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CN115521298A - Preparation method of brexpiprazole - Google Patents

Preparation method of brexpiprazole Download PDF

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Publication number
CN115521298A
CN115521298A CN202210498690.2A CN202210498690A CN115521298A CN 115521298 A CN115521298 A CN 115521298A CN 202210498690 A CN202210498690 A CN 202210498690A CN 115521298 A CN115521298 A CN 115521298A
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reaction
brexpiprazole
benzo
ipiprazole
bis
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Inventor
邹平
张海峰
张义森
邱小龙
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Jiangsu Huiju Pharmaceutical Co ltd
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Jiangsu Huiju Pharmaceutical Co ltd
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D409/00Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms
    • C07D409/02Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings
    • C07D409/12Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings linked by a chain containing hetero atoms as chain links

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Abstract

The invention relates to a method for preparing brexpiprazole, in particular to a method for preparing brexpiprazole by reacting 7-bromoquinoline-2 (1H) -ketone with 4- (4- (benzo [ b ] thiophene-4-yl) piperazine-1-yl) butyl-1-alcohol under the conditions of a copper reagent, alkali, a solvent and additives.

Description

Preparation method of brexpiprazole
Technical Field
The invention relates to the field of chemical synthesis, and relates to a novel method for preparing brexpiprazole.
Background
Schizophrenia and major depression (MDD) are two of the most common serious mental diseases, the pathogenesis of which is unknown and which can lead to disability, and about 1% of people worldwide are affected by it.
On 10 days 7/2015, the united states Food and Drug Administration (FDA) approved that an ipiprazole (trade name: rexulti) tablet developed together with the north medicine of danazol and the medicine of tsukamur japan was marketed, and was suitable for the treatment of schizophrenia and the adjuvant treatment of MDD. Epipiprazole can be used for treating dopamine D 2 And 5-hydroxytryptamine 1A (5-HT) 1A ) Partial agonism of receptor and on 5-HT 2A Antagonistic effects of receptors and adrenergic alpha 2 produce anti-schizophrenia effects. The brexpiprazole has good curative effect and tolerance, and can reduce the incidence of adverse reactions such as incapability of sitting and sitting, uneasiness, insomnia and the like of patients. Therefore, the brexpiprazole has good market prospect as a multi-target anti-mental disease drug.
The Chinese cultural name of the brexpiprazole is as follows: 7- [4- (4- (benzo [ b ] thiophen-4-yl) -piperazin-1-yl) butoxy ] -1H-quinolin-2-one having the following chemical structure:
Figure BDA0003634438200000011
several patents have reported the synthesis of ipiprazole. Patent CN2006800011923.0 is the original synthesis route patent of tsukamur pharmaceutical company, which uses 7-hydroxyquinolin-2 (1H) -one and 4-bromobenzo [ b ] thiophene as starting materials, and prepares ipiprazole by condensing 7- (4-chlorobutoxy) quinolin-2 (1H) -one and 4- (1-piperazinyl) -benzo [ b ] thiophene hydrochloride under alkaline conditions. The relevant synthetic route is as follows:
Figure BDA0003634438200000021
in patent CN105440026A, 7-hydroxyquinoline-2 (1H) -one is also used as a starting material, ding Wanlian and piperazinyl are sequentially introduced through two nucleophilic substitution reactions to obtain 7- (1-piperazine butoxy) -1H-quinoline-2-one, and finally benzo [ b ] thiophene fragments are introduced through a coupling reaction catalyzed by palladium acetate to prepare the ipiprazole. The synthetic route of the patent is as follows:
Figure BDA0003634438200000022
patent CN201610006862.4 reports a synthetic route using 4-amino-benzo [ b ] thiophene as an intermediate. 4-amino-benzo [ b ] thiophene firstly reacts with bis (2-chloroethyl) amine hydrochloride to prepare 4- (1-piperazinyl) -benzo [ b ] thiophene hydrochloride, and then the 4- (1-piperazinyl) -benzo [ b ] thiophene hydrochloride reacts with 7- (4-methanesulfonyloxy butoxy) quinoline-2 (1H) -ketone to realize the synthesis of the ipiprazole. The synthetic route of the patent is as follows:
Figure BDA0003634438200000023
the patent CN105541819a reports a synthetic route to the final step of preparation of ipiprazole by condensation of N, N-bis (2-chloroethyl) benzo [ b ] thiophen-4-amine with 7- (4-aminobutoxy) quinolin-2 (1H) -one under basic conditions. The synthetic route is as follows:
Figure BDA0003634438200000024
the final step in many current synthetic routes to ipiprazole involves the use of genotoxic/potentially genotoxic compounds (including chloroalkane chain compounds, sulfonyl compounds, etc.). The use of genotoxic and potentially genotoxic compounds can have a large impact on the quality of the final ipiprazole and requires strict control of the residual amount of these genotoxic compounds in the bulk drug ipiprazole. The use and removal of these genotoxic compounds and potentially genotoxic compounds is a significant challenge for the industrialization of ipiprazole. For this reason, the development of new process routes that do not involve the use of genotoxic/potentially genotoxic compounds is of great importance for the industrialization of ipiprazole. The structures of some genotoxic/potentially genotoxic compounds involved in the last step of the above synthetic route are as follows:
Figure BDA0003634438200000031
disclosure of Invention
The technical problem underlying the present invention is to provide a new synthetic process for the preparation of ipiprazole, which reaction step does not involve the use of genotoxic/potentially genotoxic compounds.
It was found that 7-bromoquinolin-2 (1H) -one reacts with 4- (4- (benzo [ b ] thiophen-4-yl) piperazin-1-yl) butan-1-ol under conditions of copper reagent, base, solvent and additives to produce ipiprazole, having the following reaction formula:
Figure BDA0003634438200000032
the copper reagent used in the reaction is Cu (OAc) 2 ,CuI。
The base used in the reaction is t BuONa, t BuOK。
The additive used in the reaction is oxalyl diamine compound comprising N 1 ,N 2 Bis (phenylethyl) oxalyldiamine, N 1 ,N 2 Bis (naphthalen-1-ylmethyl) oxalyldiamine.
The solvent used in the reaction is tert-butanol 1,4-dioxane, DMF.
The process route for preparing the brexpiprazole avoids the use of genotoxic compounds/potential genotoxic compounds, and the used catalyst is a copper compound with low price, so the method has obvious significance for improving the product quality of the brexpiprazole and industrially producing the brexpiprazole.
Detailed Description
The present invention will be more specifically understood from the following examples, which are given by way of illustration and are not intended to limit the scope of the present invention.
Example 1 preparation of Epipprazole
The Schlenk flask was equipped with magnetic stirring and 7-bromoquinolin-2 (1H) -one (2.25 g, 10.0 mmol), 4- (4- (benzo [ b ] b) were added sequentially under nitrogen]Thien-4-yl) piperazin-1-yl) butan-1-ol (3.50g, 12.05mmol), cuprous iodide (95 mg,0.5 mmol), potassium tert-butoxide (1.35g, 12mmol), N 1 ,N 2 Bis (phenylethyl) oxalyldiamine (150mg, 0.5 mmol) and
Figure BDA0003634438200000042
molecular sieves (0.5 g). The system was purged with nitrogen 3 times, and 1,4-dioxane (12 mL) was added to the reaction system under nitrogen protection. After the addition, the system was replaced with nitrogen again for 3 times, the Schlenk reaction flask was closed, and the system was heated to 80. + -. 5 ℃ and reacted for 24 hours with rapid stirring. After the reaction is finished, the system is naturally cooled to room temperature, and CH is added 2 Cl 2 (50 mL) for 10 minutes, filtered, the organic solvent removed from the filtrate under reduced pressure, and the residue recrystallized from ethanol to give brexpiprazole (white solid, 3.89g, 89.7%).
Example 2 preparation of Epipprazole
The Schlenk reaction flask was equipped with magnetic stirring,7-Bromoquinolin-2 (1H) -one (3.0 g, 13.39mmol), 4- (4- (benzo [ b ] ne) were added in succession under nitrogen protection]Thien-4-yl) piperazin-1-yl) butan-1-ol (4.70g, 16.18mmol), copper acetate (135mg, 0.68mmol), sodium tert-butoxide (1.55g, 16.1mmol), N 1 ,N 2 Bis (naphthalen-1-ylmethyl) oxalyldiamine (250 mg,0.68 mmol) and
Figure BDA0003634438200000041
molecular sieves (0.6 g). The system was purged with nitrogen 3 times, and then DMF (18 mL) was added to the reaction system under nitrogen protection. After the addition, the system was again replaced with nitrogen for 3 times, the Schlenk reaction flask was closed, and the system was heated to 80. + -. 5 ℃ and reacted for 24 hours with rapid stirring. After the reaction is finished, the system is naturally cooled to room temperature, and CH is added 2 Cl 2 (60 mL) for 10 min, filtered, the filtrate was stripped of organic solvent under reduced pressure and the residue was recrystallized from ethanol to give brexpiprazole (white solid, 4.95g, 85.3%).

Claims (6)

1. A method for preparing brexpiprazole has the following synthetic route:
Figure FDA0003634438190000011
2. the process according to claim 1, wherein 7-bromoquinolin-2 (1H) -one is reacted with 4- (4- (benzo [ b ] thiophen-4-yl) piperazin-1-yl) butan-1-ol in the presence of a copper reagent, a base, a solvent and additives.
3. The method according to claim 2, wherein the base used in the reaction comprises t BuONa, t BuOK。
4. The process of claim 2 wherein the solvent used in the reaction is t-butanol 1,4-dioxane, DMF.
5. The process according to claim 2, wherein the copper reagent used in the reaction is Cu (OAc) 2 ,CuI。
6. The process of claim 2, wherein the additive used in the reaction is oxalyldiamide compound comprising N 1 ,N 2 Bis (phenylethyl) oxalyldiamine, N 1 ,N 2 Bis (naphthalen-1-ylmethyl) oxalyldiamine.
CN202210498690.2A 2022-05-09 2022-05-09 Preparation method of brexpiprazole Pending CN115521298A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101258147A (en) * 2005-08-31 2008-09-03 大塚制药株式会社 Derivatives of 4-piperazin-1-yl-4-benz0[B]thiophene suitable for the treatment of CNS disorders
CN106916148A (en) * 2015-12-25 2017-07-04 上海科胜药物研发有限公司 A kind of synthesis is according to a method for piperazine azoles
CN113372336A (en) * 2020-02-25 2021-09-10 齐鲁制药有限公司 Preparation method and application of brexpiprazole

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101258147A (en) * 2005-08-31 2008-09-03 大塚制药株式会社 Derivatives of 4-piperazin-1-yl-4-benz0[B]thiophene suitable for the treatment of CNS disorders
CN106916148A (en) * 2015-12-25 2017-07-04 上海科胜药物研发有限公司 A kind of synthesis is according to a method for piperazine azoles
CN113372336A (en) * 2020-02-25 2021-09-10 齐鲁制药有限公司 Preparation method and application of brexpiprazole

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CHEN, ZX ET AL.: "Oxalic Diamides and tert-Butoxide: Two Types of Ligands Enabling Practical Access to Alkyl Aryl Ethers via Cu-Catalyzed Coupling Reaction", JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, vol. 141, no. 8, 28 January 2019 (2019-01-28), pages 3541 - 3549, XP055594032, DOI: 10.1021/jacs.8b12142 *

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