HK40027082A

HK40027082A - Novel intermediates useful for the synthesis of aminopyrimidine derivatives, process for preparing the same, and process for preparing aminopyrimidine derivatives using the same

Info

Publication number: HK40027082A
Application number: HK62020016613.5A
Authority: HK
Inventors: Sang-Ho Oh; Ja-Heouk Khoo; Jong-Chul Lim; Doo-Byung Lee; Jung-Ae Lee; Jun-Sup Lee; Hyun Ju; Woo-Seob Shin; Sang-Seol JEON
Original assignee: Yuhan Corporation
Priority date: 2017-07-28
Filing date: 2018-07-25
Publication date: 2021-01-15

Description

Novel intermediate useful for synthesis of aminopyrimidine derivative, method for preparing same, and method for preparing aminopyrimidine derivative using same

Technical Field

The present invention relates to novel intermediates useful in the synthesis of aminopyrimidine derivatives and to processes for their preparation. Furthermore, the present invention relates to a process for preparing aminopyrimidine derivatives or pharmaceutically acceptable salts thereof using the novel intermediates.

Background

WO 2016/060443 discloses aminopyrimidine derivatives or pharmaceutically acceptable salts thereof having selective inhibitory activity on protein kinases, especially protein kinases of mutant epidermal growth factor receptors. The aminopyrimidine derivatives or pharmaceutically acceptable salts thereof can provide effective and safe treatment of non-small cell lung cancer. WO 2016/060443 discloses N- (5- (4- (4- ((dimethylamino) methyl) -3-phenyl-1H-pyrazol-1-yl) pyrimidin-2-ylamino) -4-methoxy-2-morpholinophenyl) acrylamide as aminopyrimidine derivatives of the following formula 1 and a method for preparing the same.

< formula 1>

WO 2016/060443 also discloses derivatives of aminopyrimidines useful for preparing formula (I)The method of (a) is, for example, a method according to the following reaction scheme. In the following reaction scheme, R₁Can be methoxy, R₂Can be hydrogen, R₃May be morpholinyl, R₄Can be hydrogen, R₅Can be phenyl, R₆Can be hydrogen, and R₇May be dimethylamino.

< reaction scheme >

In particular, the process for the preparation of the compound of formula (I) according to the above reaction scheme comprises reacting a compound of formula (a) with a compound of formula (b) by using sodium hydride to obtain a compound of formula (c); reacting a compound of formula (c) with a compound of formula (d) by using sodium hydride to obtain a compound of formula (e); performing a reductive amination of the compound of formula (e) to obtain a compound of formula (f); reducing the compound of formula (f) by using iron and ammonium chloride to obtain a compound of formula (g); and reacting the compound of formula (g) with acryloyl chloride to obtain the compound of formula (I).

The process comprises the reaction using sodium hydride to prepare a compound of formula (c) and a compound of formula (e). However, since sodium hydride has a high possibility of fire and explosion, there is a problem that it is difficult to use for industrial mass production.

Furthermore, the method comprises the use of iron in the step of reducing the nitro group of the compound of formula (f) to its amino group. However, the use of iron may cause corrosion and contamination in the reactor, which makes it difficult to apply it to mass production. Furthermore, during the reduction with iron and ammonium chloride to obtain the compound of formula (g), unknown pitches and degradation products are produced; and the product (i.e., the compound of formula (g)) was obtained in black. Thus, in order to obtain the final product (the compound of formula (I) having a suitable purity), a purification process needs to be performed by column chromatography, which is difficult to apply to mass production.

In addition, since acryloyl chloride used in the final step of preparing the compound of formula (I) has low stability, it is difficult to handle it at the production site. Furthermore, it is difficult to prepare the compound of formula (I) with suitable purity because various degradation products are generated during the reaction of the compound of formula (g) with acryloyl chloride.

Disclosure of Invention

Technical problem

The present invention provides a novel process suitable for industrial mass production and capable of preparing N- (5- (4- (4- ((dimethylamino) methyl) -3-phenyl-1H-pyrazol-1-yl) pyrimidin-2-ylamino) -4-methoxy-2-morpholinophenyl) acrylamide (compound of formula 1) or a pharmaceutically acceptable salt thereof with high purity and yield.

Furthermore, the present invention also provides novel intermediates useful in the process and processes for their preparation.

Solution to the problem

According to one aspect of the present invention, there is provided a process for the preparation of N- (5- (4- (4- ((dimethylamino) methyl) -3-phenyl-1H-pyrazol-1-yl) pyrimidin-2-ylamino) -4-methoxy-2-morpholinophenyl) acrylamide (the compound of formula 1) or a pharmaceutically acceptable salt thereof, comprising (a) reacting N- (5- (4- (4-formyl-3-phenyl-1H-pyrazol-1-yl) pyrimidin-2-ylamino) -4-methoxy-2-morpholinophenyl) acrylamide (the compound of formula 2) with dimethylamine or an acid addition salt thereof in the presence of a reducing agent and a base to form N- (5- (4- (4- (4-, (4-pyrazol-1H-yl) pyrimidin-2-ylamino) -4-methoxy-2-morpholinophenyl) acrylamide (the compound of formula 2) (dimethylamino) methyl) -3-phenyl-1H-pyrazol-1-yl) pyrimidin-2-ylamino) -4-methoxy-2-morpholinophenyl) acrylamide (a compound of formula 1); and (b) isolating the N- (5- (4- (4- ((dimethylamino) methyl) -3-phenyl-1H-pyrazol-1-yl) pyrimidin-2-ylamino) -4-methoxy-2-morpholinophenyl) acrylamide (compound of formula 1) from the reaction mixture of step (a).

In one embodiment, N- (5- (4- (4-formyl-3-phenyl-1H-pyrazol-1-yl) pyrimidin-2-ylamino) -4-methoxy-2-morpholinophenyl) acrylamide (compound of formula 2) may be obtained by reacting N- (5-carboxamido-4-methoxy-2-morpholinophenyl) acrylamide (compound of formula 4) with 1- (2- (methylsulfonyl) pyrimidin-4-yl) -3-phenyl-1H-pyrazole-4-carbaldehyde (compound of formula 10).

In another embodiment, N- (5-carboxamido-4-methoxy-2-morpholinophenyl) acrylamide (a compound of formula 4) may be obtained by a process comprising: (i) reacting N- (5-amino-2-methoxy-4-morpholinophenyl) carboxamide (a compound of formula 6) with a compound of formula 14 to form a compound of formula 5; and (ii) reacting the compound of formula 5 with a base to obtain N- (5-carboxamido-4-methoxy-2-morpholinophenyl) acrylamide:

< formula 14>

< formula 5>

Wherein X and Y are independently of each other halogen.

In another embodiment, N- (5-amino-2-methoxy-4-morpholinophenyl) carboxamide (compound of formula 6) may be obtained by performing a reduction of N- (2-methoxy-4-morpholino-5-nitrophenyl) carboxamide (compound of formula 7). N- (2-methoxy-4-morpholino-5-nitrophenyl) carboxamide (the compound of formula 7) may be obtained by performing formylation of 2-methoxy-4-morpholino-5-nitroaniline (the compound of formula 8).

In another embodiment, 1- (2- (methylsulfonyl) pyrimidin-4-yl) -3-phenyl-1H-pyrazole-4-carbaldehyde (a compound of formula 10) can be obtained by reacting 1- (2- (methylthio) pyrimidin-4-yl) -3-phenyl-1H-pyrazole-4-carbaldehyde with an oxidizing agent. 1- (2- (methylthio) pyrimidin-4-yl) -3-phenyl-1H-pyrazole-4-carbaldehyde can be obtained by reacting 4-chloro-2- (methylthio) pyrimidine with 3-phenyl-1H-pyrazole-4-carbaldehyde.

According to another aspect of the present invention, there is provided N- (5- (4- (4-formyl-3-phenyl-1H-pyrazol-1-yl) pyrimidin-2-ylamino) -4-methoxy-2-morpholinophenyl) acrylamide (a compound of formula 2).

According to another aspect of the present invention, there is provided N- (5-carboxamido-4-methoxy-2-morpholinophenyl) acrylamide (a compound of formula 4).

According to another aspect of the present invention, there is provided a compound of formula 5:

< formula 5>

Wherein Y is halogen.

According to another aspect of the present invention, there is provided N- (5-amino-2-methoxy-4-morpholinophenyl) carboxamide (a compound of formula 6).

The invention has the advantages of

The process of the present invention effectively solves the problems involved in the prior art processes by preparing N- (5- (4- (4- ((dimethylamino) methyl) -3-phenyl-1H-pyrazol-1-yl) pyrimidin-2-ylamino) -4-methoxy-2-morpholinophenyl) acrylamide (compound of formula 1) via a novel intermediate, i.e., a compound of formulae 2, 4, 5 and 6. That is, the method of the present invention includes preparing the compound of formula 5 from the compound of formula 6. The compound of formula 5 is then converted to the compound of formula 4, thereby enabling the use of acryloyl chloride to be avoided. Also, in the method of the present invention, the removal and control of impurities can be easily performed. In addition, since the present invention can avoid the use of iron and ammonium chloride in the step for preparing the compound of formula 6 (i.e., in the reduction step), the method can solve the problems of corrosion and contamination in the reactor caused by the use of iron; thus being suitable for industrial mass production.

Best mode for carrying out the invention

The present invention provides a process for the preparation of N- (5- ((4- (4- ((dimethylamino) methyl) -3-phenyl-1H-pyrazol-1-yl) pyrimidin-2-yl) amino) -4-methoxy-2-morpholinophenyl) acrylamide, or a pharmaceutically acceptable salt thereof, via novel intermediates. The overall reaction scheme of the process of the present invention is represented as the following reaction scheme 1.

< reaction scheme 1>

In reaction scheme 1, X and Y are independently from each other halogen.

Hereinafter, the method of the present invention will be described in detail with reference to the corresponding steps of reaction scheme 1.

The present invention provides a process for the preparation of N- (5- (4- (4- ((dimethylamino) methyl) -3-phenyl-1H-pyrazol-1-yl) pyrimidin-2-ylamino) -4-methoxy-2-morpholinophenyl) acrylamide (the compound of formula 1), or a pharmaceutically acceptable salt thereof, comprising (a) reacting N- (5- (4- (4-formyl-3-phenyl-1H-pyrazol-1-yl) pyrimidin-2-ylamino) -4-methoxy-2-morpholinophenyl) acrylamide (the compound of formula 2) with dimethylamine, or an acid addition salt thereof, in the presence of a reducing agent and a base to form N- (5- (4- (4- ((dimethylamino) methyl amino) methyl) acrylamide (the compound of formula 2) Yl) -3-phenyl-1H-pyrazol-1-yl) pyrimidin-2-ylamino) -4-methoxy-2-morpholinophenyl) acrylamide (the compound of formula 1); and (b) isolating the N- (5- (4- (4- ((dimethylamino) methyl) -3-phenyl-1H-pyrazol-1-yl) pyrimidin-2-ylamino) -4-methoxy-2-morpholinophenyl) acrylamide (compound of formula 1) from the reaction mixture of step (a).

In the process of the present invention, the reaction of step (a) is a reductive amination. The reducing agent used in the reductive amination may be one or more selected from the group consisting of: sodium triacetoxyborohydride, sodium cyanoborohydride, and sodium borohydride. Preferably, the reducing agent may be sodium triacetoxyborohydride. The reducing agent may be used in an amount ranging from 1.0 to 5.0 equivalents, preferably from 1.0 to 3.0 equivalents, per 1 equivalent of the compound of formula 2, but the amount thereof may vary depending on the reducing agent. The base used in the reaction may be one or more selected from the group consisting of: sodium carbonate, sodium bicarbonate, potassium carbonate, potassium phosphate (including monobasic, dibasic and tribasic potassium phosphates), sodium phosphate (including monobasic, dibasic and tribasic sodium phosphates), 1, 8-diazabicyclo [5.4.0] undec-7-ene (DBU), 1, 4-diazabicyclo [2.2.2] octane (DABCO), 1, 5-diazabicyclo [4.3.0] non-5-ene (DBN), pyridine, triethylamine, diisopropylamine and diisopropylethylamine. The reductive amination can be carried out in the presence of one or more solvents selected from the group consisting of dimethylacetamide, dimethylformamide, dichloromethane, tetrahydrofuran, acetonitrile, and ethyl acetate. Moreover, the reaction may be carried out at a temperature in the range of 0 to 50 ℃, preferably 20 to 30 ℃. Thus, the reaction can be carried out under mild conditions; therefore, the method is suitable for industrial large-scale production.

The isolation of step (b) may be carried out by crystallization from the reaction mixture of step (a). For example, the isolation of step (b) may be performed by crystallization by adding an anti-solvent to the reaction mixture of step (a). The antisolvent may be C₁～C₅An alcohol (e.g., methanol, ethanol, isopropanol, butanol, etc.), water, or a mixture thereof, preferably water. Although the amount of the antisolvent to be used is not particularly limited, the antisolvent may be used, for example, in a weight ratio ranging from 2 to 20 times, preferably from 3 to 10 times, based on the compound of formula 2. The separation step may also be carried out at a temperature in the range of from 0 to 40 ℃, preferably from 20 to 30 ℃. Thus, the process of the invention can be carried out under mild conditions; therefore, the method is suitable for industrial large-scale production.

In the method of the present invention, N- (5- (4- (4-formyl-3-phenyl-1H-pyrazol-1-yl) pyrimidin-2-ylamino) -4-methoxy-2-morpholinophenyl) acrylamide (compound of formula 2) used in step (a) may be obtained by reacting N- (5-carboxamido-4-methoxy-2-morpholinophenyl) acrylamide (compound of formula 4) with 1- (2- (methylsulfonyl) pyrimidin-4-yl) -3-phenyl-1H-pyrazole-4-carbaldehyde (compound of formula 10). The reaction of the compound of formula 4 with the compound of formula 10 may be carried out in the presence of one or more bases selected from sodium hydride, C₁～C₆Sodium alkoxide, C₁～C₆Potassium alkoxide, sodium carbonate, potassium carbonate, lithium carbonate, cesium carbonate, sodium hydrogen carbonate, potassium phosphate, 1, 8-diazabicyclo [5.4.0]Undec-7-ene (DBU), 1, 4-diazabicyclo [2.2.2]Octane (DABCO), 1, 5-diazabicyclo [4.3.0]]Non-5-ene (DBN), pyridine, dimethylaminopyridine and triethylamine, preferably C₁～C₆Sodium alkoxide or C₁～C₆Potassium alkoxide, more preferably C₁～C₆And (3) sodium alkoxide. The base may be in the range of 1 to 5 moles, preferably 1.0 to 2.0 moles, per 1 mole of the compound of formula 4The amount of (B) is used. Further, the reaction of the compound of formula 4 with the compound of formula 10 may be carried out in the presence of an inert solvent, for example, in the presence of one or more solvents selected from dimethylformamide, dimethylacetamide, dichloromethane, dimethylsulfoxide, tetrahydrofuran, hexamethylphosphoramide, C₁～C₅Alcohols, diethyl ether, ethyl acetate, acetonitrile and acetone. Preferably, the reaction can be carried out in dimethylformamide or tetrahydrofuran. Moreover, the reaction may be carried out at a temperature in the range of 0 to 50 ℃, preferably 0 to 30 ℃.

In the method of the present invention, N- (5-carboxamido-4-methoxy-2-morpholinophenyl) acrylamide (compound of formula 4) can be obtained by a method comprising: (i) reacting N- (5-amino-2-methoxy-4-morpholinophenyl) carboxamide (a compound of formula 6) with a compound of formula 14 to form a compound of formula 5; and (ii) reacting the compound of formula 5 with a base to obtain N- (5-carboxamido-4-methoxy-2-morpholinophenyl) acrylamide:

< formula 14>

< formula 5>

Wherein X and Y are independently of each other halogen.

In one embodiment of the process of the present invention, steps (i) and (ii) may be carried out in a one-pot reaction without isolating the compound of formula 5. Thus, the process of the present invention is suitable for industrial mass production.

The reaction of step (i), i.e., the reaction of the compound of formula 6 with the compound of formula 14, may be carried out in the presence of one or more bases selected from potassium tert-butoxide, sodium hydroxide, potassium hydroxide, sodium hydride, sodium carbonate, sodium bicarbonate, potassium carbonate, potassium phosphate (including potassium mono-, di-and tri-basic phosphates), sodium phosphate (i)Including monobasic, dibasic and tribasic sodium phosphates), 1, 8-diazabicyclo [5.4.0]Undec-7-ene (DBU), 1, 4-diazabicyclo [2.2.2]Octane (DABCO), 1, 5-diazabicyclo [4.3.0]]Non-5-ene (DBN), pyridine, triethylamine, diisopropylamine and diisopropylethylamine. The base may be used in an amount ranging from 1 to 5 equivalents, preferably from 1 to 3 equivalents, per 1 equivalent of the compound of formula 6. The reaction may be carried out in the presence of one or more solvents selected from the group consisting of acetone, acetonitrile, methyl ethyl ketone, dimethylformamide, dimethylacetamide, dichloromethane, dimethyl sulfoxide, dimethyl sulfonamide, tetrahydrofuran, hexamethylphosphoramide, C₁～C₅Alcohols, dimethyl ether, diethyl ether, diisopropyl ether, ethyl acetate, dimethoxyethane and toluene. Preferably, the solvent may be acetone, acetonitrile, methyl ethyl ketone, or C₁～C₅Alcohols (such as methanol, ethanol, propanol, isopropanol, butanol, etc.). More preferably, the solvent may be acetonitrile. The reaction may be carried out at a temperature in the range of O to 100 ℃, preferably 10 to 30 ℃.

In the reaction of step (ii), i.e., the reaction of the compound of formula 5 with a base, the base may be one or more selected from the group consisting of: potassium tert-butoxide, sodium hydroxide, potassium hydroxide, lithium hydroxide, sodium hydride, sodium carbonate, sodium bicarbonate, potassium carbonate, potassium phosphate (including monobasic, dibasic and tribasic potassium phosphates), sodium phosphate (including monobasic, dibasic and tribasic sodium phosphates), 1, 8-diazabicyclo [5.4.0]Undec-7-ene (DBU), 1, 4-diazabicyclo [2.2.2]Octane (DABCO), 1, 5-diazabicyclo [4.3.0]]Non-5-ene (DBN), pyridine, triethylamine, diisopropylamine and diisopropylethylamine. The base may preferably be sodium hydroxide, triethylamine or diisopropylamine, more preferably triethylamine. The base may be used in an amount ranging from 1 to 20 equivalents, preferably from 5 to 10 equivalents, per 1 equivalent of the compound of formula 6. Further, the reaction may be carried out in the presence of a solvent selected from acetonitrile, methyl ethyl ketone, acetone, methyl isobutyl ketone, dichloromethane, dichloroethane, dimethylformamide, dimethylacetamide, dimethylsulfoxide, tetrahydrofuran, C₁～C₅Alcohol, methanolBenzene, ethyl acetate, isopropyl acetate, diethyl ether, water, and mixtures thereof. Preferably, the solvent may be selected from C₁～C₅Alcohols, acetonitrile, tetrahydrofuran, methyl ethyl ketone, acetone, methylene chloride, water, and mixtures thereof. More preferably, the solvent may be C₁～C₅An alcohol. The reaction of the compound of formula 5 with a base may be carried out at a temperature in the range of 40 to 150 ℃, preferably in the range of 60 to 100 ℃, more preferably at the reflux temperature of the solvent used.

In the method of the present invention, N- (5-amino-2-methoxy-4-morpholinophenyl) carboxamide (compound of formula 6) may be obtained by performing reduction of N- (2-methoxy-4-morpholino-5-nitrophenyl) carboxamide (compound of formula 7). The reduction may be carried out using a reducing agent selected from formic acid and ammonium formate. The amount of reducing agent can range from 1 to 15 equivalents per 1 equivalent of the compound of formula 7. Moreover, the reduction may be carried out in the presence of a catalyst selected from palladium, palladium on carbon, zinc, copper, magnesium and platinum, preferably in the presence of palladium on carbon. The reaction may be carried out in the presence of an inert solvent, for example in the presence of one or more solvents selected from dimethylformamide, dimethylacetamide, dichloromethane, dimethyl sulfoxide, tetrahydrofuran, hexamethylphosphoramide, C₁～C₅Alcohols, diethyl ether, ethyl acetate, acetonitrile and acetone. Preferably, the solvent may be tetrahydrofuran and/or ethanol. Moreover, the reaction may be carried out at a temperature in the range of 0 to 50 ℃, preferably 20 to 30 ℃.

In the method of the present invention, N- (2-methoxy-4-morpholino-5-nitrophenyl) carboxamide (compound of formula 7) may be obtained by performing formylation of 2-methoxy-4-morpholino-5-nitroaniline (compound of formula 8). The formylation may be carried out using a mixture of acetic acid (e.g., anhydrous acetic acid) and formic acid. The amount of each of acetic acid and formic acid to be used may be in the range of 2 to 5 moles, preferably 2.5 to 3.5 moles, per 1 mole of the compound of formula 8. Furthermore, the formylation may be carried out in the presence of an inert solvent, for example in the presence of one or more solvents selected from dimethylDimethylformamide, dimethylacetamide, dichloromethane, dimethyl sulfoxide, tetrahydrofuran, hexamethylphosphoramide, C₁～C₅Alcohols, diethyl ether, ethyl acetate, acetonitrile and acetone. Preferably, the solvent may be dimethylformamide, dimethylacetamide, tetrahydrofuran, or a mixture thereof. Moreover, the reaction may be carried out at a temperature in the range of 0 to 70 ℃, preferably 20 to 50 ℃.

In the method of the present invention, 2-methoxy-4-morpholino-5-nitroaniline (compound of formula 8) can be obtained by reacting 4-fluoro-2-methoxy-5-nitroaniline (compound of formula 9) with morpholine (compound of formula 15). The reaction may be carried out in the presence of one or more bases selected from C₁～C₆Sodium alkoxide, C₁～C₆Potassium alkoxide, sodium carbonate, potassium carbonate, lithium carbonate, cesium carbonate, sodium hydrogen carbonate, potassium phosphate, 1, 8-diazabicyclo [5.4.0]Undec-7-ene (DBU), 1, 4-diazabicyclo [2.2.2]Octane (DABCO), 1, 5-diazabicyclo [4.3.0]]Non-5-ene (DBN), pyridine, dimethylaminopyridine, triethylamine and diisopropylethylamine. Preferably, the base may be triethylamine or diisopropylethylamine. The reaction may be carried out in the presence of an inert solvent, for example in the presence of one or more solvents selected from dimethylformamide, dimethylacetamide, dichloromethane, dimethyl sulfoxide, tetrahydrofuran, hexamethylphosphoramide, C₁～C₅Alcohols, diethyl ether, ethyl acetate, acetonitrile and acetone. Preferably, the solvent may be acetonitrile or tetrahydrofuran. Moreover, the reaction may be carried out at a temperature in the range of 0 to 100 ℃, preferably 70 to 80 ℃.

In one embodiment, the compound of formula 10 used as an intermediate in reaction scheme 1 may be prepared according to reaction scheme 2 below.

< reaction scheme 2>

1- (2- (methylsulfonyl) pyrimidin-4-yl) -3-phenyl-1H-pyri-dineOxazole-4-carbaldehyde (a compound of formula 10) can be obtained by reacting 1- (2- (methylthio) pyrimidin-4-yl) -3-phenyl-1H-pyrazole-4-carbaldehyde (a compound of formula 11) with an oxidizing agent. The oxidizing agent may be one or more selected from the group consisting of: potassium permanganate, chromic acid, oxygen, hydrogen peroxide and 3-chloroperbenzoic acid. Preferably, the oxidizing agent may be hydrogen peroxide. The amount of the oxidizing agent to be used may be in the range of 1.8 to 10.0 moles, preferably 2.0 to 5.0 moles, per 1 mole of the compound of formula 17. Moreover, the reaction rate can be increased by performing the oxidation in the presence of a catalyst such as ammonium molybdate tetrahydrate. The reaction may be carried out in the presence of one or more solvents selected from C₁～C₅Alcohols, carbon tetrachloride, chloroform, methylene chloride, acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, pentane, hexane, heptane, octane, nonane, decane, undecane, dodecane, cyclohexane, petroleum ether, kerosene, toluene, xylene, mesitylene, and benzene.

1- (2- (methylthio) pyrimidin-4-yl) -3-phenyl-1H-pyrazole-4-carbaldehyde (the compound of formula 11) can be obtained by reacting 4-chloro-2- (methylthio) pyrimidine (the compound of formula 12) with 3-phenyl-1H-pyrazole-4-carbaldehyde (the compound of formula 13). The reaction of the compound of formula 12 with the compound of formula 13 may be carried out in the presence of one or more bases selected from potassium tert-butoxide, sodium hydroxide, potassium hydroxide, sodium hydride, sodium carbonate, potassium phosphates (including monobasic potassium phosphate, dibasic potassium phosphate, and tribasic potassium phosphate), sodium phosphates (including monobasic sodium phosphate, dibasic sodium phosphate, and tribasic sodium phosphate), 1, 8-diazabicyclo [5.4.0]Undec-7-ene (DBU), 1, 4-diazabicyclo [2.2.2]Octane (DABCO), 1, 5-diazabicyclo [4.3.O]Non-5-ene (DBN), pyridine, triethylamine, diisopropylamine and diisopropylethylamine. Preferably, the base may be selected from sodium carbonate, potassium carbonate and potassium phosphate. The reaction may be carried out in the presence of one or more solvents selected from the group consisting of dichloromethane, dichloroethane, dimethylformamide, dimethylacetamide, dimethylsulfoxide, tetrahydrofuran, C₁～C₅Alcohols, ethyl acetate, acetone, methyl ethyl ketone, acetonitrile and toluene. Preferably, the solvent is selected fromDichloromethane, dimethylformamide and dimethylacetamide. More preferably, the solvent may be dimethylformamide. Moreover, the reaction may be carried out at a temperature in the range of 0 to 100 ℃, preferably 40 to 60 ℃.

The present invention includes within its scope novel intermediates useful in the novel process.

That is, the present invention provides N- (5- (4- (4-formyl-3-phenyl-1H-pyrazol-1-yl) pyrimidin-2-ylamino) -4-methoxy-2-morpholinophenyl) acrylamide (a compound of formula 2).

Furthermore, the present invention provides N- (5-carboxamido-4-methoxy-2-morpholinophenyl) acrylamide (a compound of formula 4).

Furthermore, the present invention provides a compound of formula 5:

< formula 5>

Wherein Y is halogen.

Furthermore, the present invention provides N- (5-amino-2-methoxy-4-morpholinophenyl) carboxamide (compound of formula 6).

The following examples are provided for illustrative purposes only and are not intended to limit the scope of the present invention.

Example 1: preparation of 2-methoxy-4-morpholino-5-nitroaniline (Compound 8)

A mixture of 4-fluoro-2-methoxy-5-nitroaniline (60.0g, 0.322mol), acetonitrile (600.0mL), diisopropylethylamine (93.3g, 0.623mol) and morpholine (84.2g, 0.967mol) was refluxed with stirring for 4 hours. Purified water (1.8L) was added to the reaction mixture. The resulting solid was filtered and then dried in vacuo to obtain 78.0g of the title compound. (yield: 96.0%)

¹H-NMR(400MHz，DMSO)δ7.21(s，1H)，6.76(s，1H)，5.03(s，2H)，3.89(s，3H)，3.69(t，4H)，2.92(t，4H)

Example 2: preparation of N- (2-methoxy-4-morpholino-5-nitrophenyl) carboxamide (Compound 7)

A mixture of anhydrous acetic acid (254.0g, 2.487mol) and formic acid (137.4g, 2.984mol) was stirred at 50 ℃ for 30 minutes. To the reaction mixture were added 2-methoxy-4-morpholino-5-nitroaniline (210.0g, 0.829mol) and tetrahydrofuran (219mL), which was then stirred at 20-25 ℃ for 1 hour. To the reaction mixture was added methyl tert-butyl ether (2.1L). The resulting solid was filtered and then dried in vacuo to obtain 211.0g of the title compound. (yield: 91.0%)

¹H-NMR(400MHz，DMSO)δ9.88(s，1H)，8.85(s，1H)，8.29(d，1H)，6.83(s，1H)，3.99(s，1H)，3.72-3.74(t，4H)，3.03-3.05(t，4H)

Example 3: n- (5-amino-2-methoxy-4-morpholinophenyl) carboxamide (Compound 6)

A mixture of N- (2-methoxy-4-morpholino-5-nitrophenyl) formamide (100.0g, 0.356mol), ethanol (700.0mL), tetrahydrofuran (700.0mL), 10% palladium on carbon (5.0g), and ammonium formate (200.0g) was stirred at room temperature for 1 hour. The reaction mixture was stirred at 40 ℃ for 2 hours and then filtered using celite. The resulting filtrate was concentrated under reduced pressure. To the resulting residue were added dichloromethane (1.4L) and purified water (1.0L), which was then stirred. The separated organic layer was concentrated under reduced pressure to obtain 61.0g of the title compound. (yield: 68.3%)

¹H-NMR(400MHz，DMSO)δ9.33(s，1H)，8.20(s，1H)，7.58(s，1H)，6.66(s，1H)，4.49(s，2H)，3.73(m，7H)，2.77(t，4H)

Example 4: preparation of 1- (2- (methylthio) pyrimidin-4-yl) -3-phenyl-1H-pyrazole-4-carbaldehyde (compound 11)

A mixture of 4-chloro-2- (methylthio) pyrimidine (102.6g, 0.639mol), 3-phenyl-1H-pyrazole-4-carbaldehyde (100.0g, 0.581mol), potassium carbonate (160.5g, 1.162mol) and dimethylformamide (700mL) was stirred at 40-50 ℃ for 2 hours. Purified water (1.6L) was slowly added to the reaction mixture, which was then stirred at room temperature for 2 hours. The resulting solid was filtered and then dried in vacuo to obtain 154.0g of the title compound. (yield: 89.5%)

¹H-NMR(400MHz，CDCl₃)δ10.10(s，1H)，9.20(s，1H)，8.65(d，1H)，7.84-7.86(m，2H)，7.67-7.71(m，3H)，2.65(s，3H)

Example 5: process for preparing 1- (2- (methylsulfonyl) pyrimidin-4-yl) -3-phenyl-1H-pyrazole-4-carbaldehyde (compound 10) Preparation of

To a solution of 1- (2- (methylthio) pyrimidin-4-yl) -3-phenyl-1H-pyrazole-4-carbaldehyde (3.0g, 10.1mmol) in ethanol (21.0mL) were added a 35% hydrogen peroxide solution (3.4g, 30.3mmol) and ammonium molybdate tetrahydrate (0.4g, 0.3 mmol). The reaction mixture was stirred for 2 hours, then extracted with dichloromethane (30.0mL) and purified water (30.0 mL). The separated organic layer was washed with a 10% sodium sulfite solution (21.0mL) and purified water, and then concentrated under reduced pressure. The residue obtained is crystallized by adding isopropanol. The resulting solid was filtered and then dried in vacuo to obtain 2.8g of the title compound. (yield: 84.3%)

¹H-NMR(400MHz，CDCl₃)δ10.12(s，1H)，9.30(s，1H)，9.00(d，1H)，8.27(d，2H)，7.87-7.93(m，2H)，7.48-7.54(m，3H)，3.44(s，3H)

Example 6: preparation of N- (5-carboxamido-4-methoxy-2-morpholinophenyl) acrylamide (Compound 4)

A mixture of N- (5-amino-2-methoxy-4-morpholinophenyl) carboxamide (20.0g, 0.080mol), acetonitrile (200.0mL), sodium bicarbonate (20.0g, 0.239mol) and 3-chloropropionyl chloride (13.1g, 0.103mol) was stirred at 20-30 ℃ for 30 minutes. To the reaction mixture were added dichloromethane (300.0mL) and purified water (200.0mL), which was then stirred. The separated organic layer was concentrated under reduced pressure to prepare 3-chloro-N- (5-carboxamido-4-methoxy-2-morpholinophenyl) propionamide (compound 5), to which were then added N-propanol (140.0mL) and triethylamine (80.5g, 0.796mol), followed by refluxing with stirring for 3 hours. The reaction mixture was allowed to cool to room temperature. The resulting solid was filtered and then dried in vacuo to obtain 24.2g of the title compound. (yield: 99.6%)

¹H-NMR(400MHz，DMSO)δ10.49(br，1H)，9.55(s，1H)，9.09(s，1H)，8.58(s，1H)，8.24(s，1H)，6.83(s，1H)，6.62(dd，1H)，6.21(d，1H)，5.71(d，1H)，3.85(s，3H)，3.76(t，4H)，2.82(t，4H)

Practice ofExample 7: n- (5- (4- (4-formyl-3-phenyl-1H-pyrazol-1-yl) pyrimidin-2-ylamino) -4-methoxy Preparation of 2-morpholinophenyl) acrylamide (Compound 2)

A mixture of N- (5-carboxamido-4-methoxy-2-morpholinophenyl) acrylamide (15.0g, 0.049mol), tetrahydrofuran (125.0mL), 1- (2- (methylsulfonyl) pyrimidin-4-yl) -3-phenyl-1H-pyrazole-4-carbaldehyde (17.7g, 0.054mol) and sodium tert-butoxide (4.5g, 0.054mol) was stirred at 20-30 ℃ for 1 hour. To the reaction mixture was added 2N NaOH solution (45.0mL), which was then stirred at room temperature for 15 hours. Purified water (75.0mL) was slowly added to the reaction mixture, which was then stirred at 20-30 ℃ for 2 hours. The resulting solid was filtered and then dried in vacuo to obtain 14.4g of the title compound. (yield: 55.8%)

¹H-NMR(400MHz，DMSO)δ10.15(s，1H)，9.95(br，1H)，9.17(s，1H)，8.98(br，1H)，8.62(d，1H)，8.37(s，1H)，8.02(m，2)，7.51(m，3H)，7.38(d，1H)，6.94(s，1H)，6.73(dd，1H)，6.30(d，1H)，5.80(d，1H)，3.90(s，3H)，3.82(t，4H)，2.86(t，4H)

Example 8: n- (5- (4- (4- ((dimethylamino) methyl) -3-phenyl-1H-pyrazol-1-yl) pyrimidin-2-ylamino) Preparation of yl) -4-methoxy-2-morpholinophenyl) acrylamide (Compound 1)

A mixture of N- (5- (4- (4-formyl-3-phenyl-1H-pyrazol-1-yl) pyrimidin-2-ylamino) -4-methoxy-2-morpholinophenyl) acrylamide (3.0g, 0.006mol), dimethylacetamide (30.0mL), dimethylamine hydrochloride (0.9g, 0.011mol), and diisopropylethylamine (3.7g, 0.029mol) was stirred at 20-30 ℃ for 1 hour. Sodium triacetoxyborohydride (3.6g, 0.017mol) was added to the reaction mixture, which was then stirred at 20-30 ℃ for 1 hour. Purified water (30.0mL) was added to the reaction mixture, which was then stirred for 1 hour. The resulting solid was filtered under reduced pressure and then dried in vacuo to obtain 2.9g of the title compound. (yield: 92.0%)

¹H-NMR(400MHz，DMSO)δ9.15(s，2H)，9.08(s，1H)，8.54(d，1H)，8.18(s，1H)，8.05(d，2H)，7.48(m.2H)，7.36(m，1H)，7.34(d，1H)，6.96(s，1H)，6.74(q，1H)，6.44(d，1H)，5.85(d，1H)，3.91(s，3H)，3.82(s，4H)，3.46(1s，1H)，2.86(s，4H)，2.21(s，6H)

Claims

1. A process for the preparation of N- (5- (4- (4- ((dimethylamino) methyl) -3-phenyl-1H-pyrazol-1-yl) pyrimidin-2-ylamino) -4-methoxy-2-morpholinophenyl) acrylamide, or a pharmaceutically acceptable salt thereof, comprising

(a) Reacting N- (5- (4- (4-formyl-3-phenyl-1H-pyrazol-1-yl) pyrimidin-2-ylamino) -4-methoxy-2-morpholinophenyl) acrylamide with dimethylamine, or an acid addition salt thereof, in the presence of a reducing agent and a base to form N- (5- (4- (4- ((dimethylamino) methyl) -3-phenyl-1H-pyrazol-1-yl) pyrimidin-2-ylamino) -4-methoxy-2-morpholinophenyl) acrylamide; and

(b) isolating the N- (5- (4- (4- ((dimethylamino) methyl) -3-phenyl-1H-pyrazol-1-yl) pyrimidin-2-ylamino) -4-methoxy-2-morpholinophenyl) acrylamide from the reaction mixture of step (a).

2. The method of claim 1, wherein the reducing agent is one or more selected from the group consisting of: sodium triacetoxyborohydride, sodium cyanoborohydride, and sodium borohydride.

3. The process according to claim 1, wherein the reducing agent is used in a ratio in the range of 1 to 5 equivalents per 1 equivalent of N- (5- (4- (4-formyl-3-phenyl-1H-pyrazol-1-yl) pyrimidin-2-ylamino) -4-methoxy-2-morpholinophenyl) acrylamide.

4. The method of claim 1, wherein the base is one or more selected from the group consisting of: sodium carbonate, sodium bicarbonate, potassium carbonate, potassium phosphate, sodium phosphate, 1, 8-diazabicyclo [5.4.0] undec-7-ene, 1, 4-diazabicyclo [2.2.2] octane, 1, 5-diazabicyclo [4.3.0] non-5-ene, pyridine, triethylamine, diisopropylamine, and diisopropylethylamine.

5. The process of claim 1, wherein the reaction of step (a) is carried out in one or more solvents selected from the group consisting of dimethylacetamide, dimethylformamide, dichloromethane, tetrahydrofuran, acetonitrile and ethyl acetate.

6. The process of claim 1, wherein the isolation of step (b) is performed by crystallization by adding an anti-solvent to the reaction mixture of step (a).

7. The method of claim 6, wherein the anti-solvent is C₁～C₅Alcohol, water, or mixtures thereof.

8. The process according to any one of claims 1 to 7, wherein the N- (5- (4- (4-formyl-3-phenyl-1H-pyrazol-1-yl) pyrimidin-2-ylamino) -4-methoxy-2-morpholinophenyl) acrylamide is obtained by reacting N- (5-carboxamido-4-methoxy-2-morpholinophenyl) acrylamide with 1- (2- (methylsulfonyl) pyrimidin-4-yl) -3-phenyl-1H-pyrazole-4-carbaldehyde.

9. The process according to claim 8, wherein the reaction is carried out in the presence of one or more bases selected from sodium hydride, C₁～C₆Sodium alkoxide, C₁～C₆Potassium alkoxide, sodium carbonate, potassium carbonate, lithium carbonate, cesium carbonate, sodium hydrogen carbonate, potassium phosphate, 1, 8-diazabicyclo [5.4.O]Undec-7-ene, 1, 4-diazabicyclo [2.2.2]Octane, 1, 5-diazabicyclo [4.3.0]Non-5-ene, pyridine, dimethylaminopyridine and triethylamine.

10. The process of claim 8, wherein the N- (5-carboxamido-4-methoxy-2-morpholinophenyl) acrylamide is obtained by a process comprising

(i) Reacting N- (5-amino-2-methoxy-4-morpholinophenyl) carboxamide with a compound of formula 14 to form a compound of formula 5; and

(ii) reacting a compound of formula 5 with a base to obtain N- (5-carboxamido-4-methoxy-2-morpholinophenyl) acrylamide:

< formula 14>

< formula 5>

Wherein X and Y are independently of each other halogen.

11. The process of claim 10, wherein steps (i) and (ii) are carried out in a one-pot reaction without isolating the compound of formula 5.

12. The process of claim 10, wherein the reaction of step (i) is carried out in the presence of one or more bases selected from potassium tert-butoxide, sodium hydroxide, potassium hydroxide, sodium hydride, sodium carbonate, sodium bicarbonate, potassium carbonate, potassium phosphate, sodium phosphate, 1, 8-diazabicyclo [5.4.0] undec-7-ene, 1, 4-diazabicyclo [2.2.2] octane, 1, 5-diazabicyclo [4.3.0] non-5-ene, pyridine, triethylamine, diisopropylamine, and diisopropylethylamine.

13. The process of claim 10, wherein the base used in step (ii) is one or more selected from the group consisting of: potassium tert-butoxide, sodium hydroxide, potassium hydroxide, lithium hydroxide, sodium hydride, sodium carbonate, sodium bicarbonate, potassium carbonate, potassium phosphate, sodium phosphate, 1, 8-diazabicyclo [5.4.0] undec-7-ene, 1, 4-diazabicyclo [2.2.2] octane, 1, 5-diazabicyclo [4.3.0] non-5-ene, pyridine, triethylamine, diisopropylamine, and diisopropylethylamine.

14. The process according to claim 10, wherein the N- (5-amino-2-methoxy-4-morpholinophenyl) carboxamide is obtained by performing a reduction of N- (2-methoxy-4-morpholino-5-nitrophenyl) carboxamide.

15. The method of claim 14, wherein the reduction is performed using a reducing agent selected from the group consisting of formic acid and ammonium formate.

16. The method of claim 14, wherein the reduction is carried out in the presence of a catalyst selected from the group consisting of palladium, palladium on carbon, zinc, copper, magnesium, and platinum.

17. The process of claim 14, wherein the N- (2-methoxy-4-morpholino-5-nitrophenyl) carboxamide is obtained by performing formylation of 2-methoxy-4-morpholino-5-nitroaniline.

18. The process of claim 17, wherein the formylation is performed using a mixture of acetic acid and formic acid.

19. The process according to claim 8, wherein the 1- (2- (methylsulfonyl) pyrimidin-4-yl) -3-phenyl-1H-pyrazole-4-carbaldehyde is obtained by reacting 1- (2- (methylthio) pyrimidin-4-yl) -3-phenyl-1H-pyrazole-4-carbaldehyde with an oxidizing agent.

20. The method of claim 19, wherein the oxidizing agent is one or more selected from the group consisting of: potassium permanganate, chromic acid, oxygen, hydrogen peroxide and 3-chloroperbenzoic acid.

21. The process of claim 19, wherein the reaction is carried out in the presence of one or more solvents selected from C₁～C₅Alcohols, carbon tetrachloride, chloroform, methylene chloride, acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, pentane, hexane, heptane, octane, nonane, decane, undecane, dodecane, cyclohexane, petroleum ether, kerosene, toluene, xylene, mesitylene, and benzene.

22. The process according to claim 19, wherein the 1- (2- (methylthio) pyrimidin-4-yl) -3-phenyl-1H-pyrazole-4-carbaldehyde is obtained by reacting 4-chloro-2- (methylthio) pyrimidine with 3-phenyl-1H-pyrazole-4-carbaldehyde.

23. The process of claim 22, wherein the reaction is carried out in the presence of one or more bases selected from potassium tert-butoxide, sodium hydroxide, potassium hydroxide, sodium hydride, sodium carbonate, potassium phosphate, sodium phosphate, 1, 8-diazabicyclo [5.4.0] undec-7-ene, 1, 4-bis-azabicyclo [2.2.2] octane, 1, 5-diazabicyclo [4.3.0] non-5-ene, pyridine, triethylamine, diisopropylamine, and diisopropylethylamine.

24. The process of claim 22, wherein the reaction is carried out in the presence of one or more solvents selected from dichloromethane, dichloroethane, dimethylformamide, dimethylacetamide, dimethylsulfoxide, tetrahydrofuran, C₁～C₅Alcohols, ethyl acetate, acetone, methyl ethyl ketone, acetonitrile and toluene.

N- (5- (4- (4-formyl-3-phenyl-1H-pyrazol-1-yl) pyrimidin-2-ylamino) -4-methoxy-2-morpholinophenyl) acrylamide.

N- (5-carboxamido-4-methoxy-2-morpholinophenyl) acrylamide.

27. A compound of formula 5 or a salt thereof:

< formula 5>

Wherein Y is halogen.

N- (5-amino-2-methoxy-4-morpholinophenyl) carboxamide.