WO2002072595A2 - Verfahren zur herstellung von pentopyranosyl-nucleosiden - Google Patents
Verfahren zur herstellung von pentopyranosyl-nucleosiden Download PDFInfo
- Publication number
- WO2002072595A2 WO2002072595A2 PCT/EP2002/002536 EP0202536W WO02072595A2 WO 2002072595 A2 WO2002072595 A2 WO 2002072595A2 EP 0202536 W EP0202536 W EP 0202536W WO 02072595 A2 WO02072595 A2 WO 02072595A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hydrogen
- benzoyl
- group
- independently
- pyranosyl
- Prior art date
Links
- 0 B[C@@]([C@@](*1O)O*)OCC1O* Chemical compound B[C@@]([C@@](*1O)O*)OCC1O* 0.000 description 2
- FHLQCHFJVURNBA-UHFFFAOYSA-N CC(C(N1)=O)=CN(C(C(C2O)OC(c3ccccc3)=O)OCC2O)C1=O Chemical compound CC(C(N1)=O)=CN(C(C(C2O)OC(c3ccccc3)=O)OCC2O)C1=O FHLQCHFJVURNBA-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
- C07H19/00—Compounds containing a hetero ring sharing one ring hetero atom with a saccharide radical; Nucleosides; Mononucleotides; Anhydro-derivatives thereof
- C07H19/02—Compounds containing a hetero ring sharing one ring hetero atom with a saccharide radical; Nucleosides; Mononucleotides; Anhydro-derivatives thereof sharing nitrogen
- C07H19/04—Heterocyclic radicals containing only nitrogen atoms as ring hetero atom
- C07H19/06—Pyrimidine radicals
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
- C07H19/00—Compounds containing a hetero ring sharing one ring hetero atom with a saccharide radical; Nucleosides; Mononucleotides; Anhydro-derivatives thereof
- C07H19/02—Compounds containing a hetero ring sharing one ring hetero atom with a saccharide radical; Nucleosides; Mononucleotides; Anhydro-derivatives thereof sharing nitrogen
- C07H19/04—Heterocyclic radicals containing only nitrogen atoms as ring hetero atom
- C07H19/16—Purine radicals
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/55—Design of synthesis routes, e.g. reducing the use of auxiliary or protecting groups
Definitions
- the present invention relates to an improved process for the preparation of pentopyranosyl nucleosides.
- Pentopyranosyl nucleosides and oligomers represent a new group of substances that was first developed by Eschenmoser et al. (Helv. Chim. Acta 1993, 76, 2161; Helv. Chim Acta 1995, 78, 1621; Angew. Chem. 1996, 108, 1619-1623). Over time, the pentopyranosyl nucleosides have emerged as a promising tool for labeling biomolecules and addressing biomolecules on solid surfaces such as surfaces. B in the production of biochips. This development is mainly due to the progress in the conjugation of pentopyranosyl nucleosides with biomolecules. At the same time, new processes for the production of pentopyranosyl nucleosides and oligomers had to be made available in order to cover the need for these substances.
- the object is achieved by the present invention, which represents a significant improvement and simplification of the process for the products of the formulas I and II described in the aforementioned DE-A-19741715.
- the 2 ' protective group migrates from the 2 ' position to the 3 ' position of the pentopyranoside, a catalyst of the formulas IVa and / or IVb being used.
- the present invention thus relates to a process for the synthesis of pentopyranosyl nucleosides, preferably pentopyranosyl nucleosides of the formula I or II
- R 1 is hydrogen, -OH, bromine or chlorine
- R 12 , R 13 , R 14 and R 15 independently of one another, identically or differently, are each hydrogen, -OR 7 , C n H 2n + ⁇ or C n H 2n - ⁇ , -C (O) R 9 , wherein R 7 has the meaning defined above and R 9 is a linear or branched, optionally substituted alkyl or aryl radical,
- S c2 is hydrogen or a protective group selected from an optionally substituted acyl, trityl, silyl or allyloxycarbonyl group, and n in the above formulas is an integer from 1 to 12, preferably 1 to 8 and in particular 1 to 4, R 1 has one of the meanings defined for R 1 ,
- R 2 , R 3 and R 4 are independently the same or different, each
- Is hydrogen O, C n H 2n + ⁇ or -OC n H 2n + ⁇ or -OC n H 2n - ⁇ or C n H 2n NR 10 ' R 11' ,
- R 10 and R 11 independently of one another have one of the meanings defined for R 10 and R 1 ,
- X ' has one of the meanings defined for X
- S c r and S C 2- independently of one another have one of the meanings defined for S c ⁇ and S C 2, comprising the rearrangement of an optionally substituted acyl protective group S c ⁇ or S c r from 2 ' -O- to 3 ' - O atom of the pyranosyl radical in the presence of a catalyst of the formula IVa and / or of the formula IVb
- A represents -CH 2 - or -NR 20 -
- R 20 denotes hydrogen, alkyl, cycloalkyl, aryl, arylalkyl or a polymer radical, in particular a radical of the polystyrene, which are optionally substituted,
- D is a group of the formula -C m H 2m - and m is an integer from 1 to 6,
- R 18 , R 19 and R 24 independently of one another, identical or different, denote hydrogen, alkyl, cycloalkyl, aryl or arylalkyl, which are optionally substituted, it being possible for R 18 and R 19 to also be linked to one another, as a result of which a group —C 0 H 2o - or -C 0 H 2o -2- with o is an integer from 2 to 4 and
- R 21 represents a group -NR 22 R 23 , in which R 22 and R 23, independently of one another, identical or different, represent hydrogen, alkyl, cycloalkyl, aryl or arylalkyl, which are optionally substituted.
- Preferred radicals R to R 20 and R 22 to R 24 can contain up to 12, in particular up to 8, carbon atoms.
- Particularly preferred aryl radicals or cycloalkyl radicals contain 5 to 7 carbon atoms and particularly preferred alkyl up to 6 carbon atoms.
- An acyl protecting group has the general formula - (O) CR 25 , in which R 25 represents an optionally substituted organic radical, such as an alkyl, cycloalkyl, aryl or arylalkyl radical.
- R 25 represents an optionally substituted organic radical, such as an alkyl, cycloalkyl, aryl or arylalkyl radical.
- Aryl residues can be carbocyclic be aromatic or heterocyclic aromatic.
- R 25 is preferably alkyl having one to six carbon atoms, phenyl or benzyl.
- a trityl protecting group has the general formula -C- (R 26 ) 3 , in which R 26 is an optionally substituted aryl radical, in particular an optionally substituted phenyl radical. Preferred substituents correspond to those of the radical R 25 .
- a silyl protecting group has the general formula -Si (R 25 ) 3 , in which R 25 has the meaning given above.
- the protective groups defined preferably contain up to 12 carbon atoms, it being possible for up to 4 carbon atoms to be replaced by heteroatoms, in particular from the group N, O, S and P.
- the method according to the invention comprises the steps: a) presentation of an unprotected pentopyranoside b) protection of the 2 ' position of the pyranosyl radical with an optionally substituted acyl protective group and, if appropriate, protection of further free positions with protective groups, in particular, if appropriate, protection of the 4 ' position the pyranosyl radical with a protective group S c2 or S c2 ' , c) splitting off a protective group which may be in the 3 ' position of the pyranosyl radical and d) rearrangement of the optionally substituted acyl protective group from the 2 ' position to the 3 ' position below Use of a catalyst of the formula IVa and / or IVb defined above.
- the method according to the invention comprises in step b) the protection of the 2 ' and 4 ' positions and, if appropriate, the 3 'position simultaneously or in a different order with a protective group, the splitting off of a position which may be in the 3 ' position Pyranosylrestes protecting group and then a rearrangement of the protective group S c1 or Sd- from the 2 ' position to the unprotected 3 ' position using a catalyst of formula IVa and / or IVb.
- Catalysts of the formulas IVa and IVb are preferably used, in which R 18 , R 19 and R 24 are, independently of one another, identical or different, hydrogen or alkyl having one to six, preferably one to four, carbon atoms or R 18 and R 19 together are a group - (CH 2 ) P -, where p is an integer from 2 to 4.
- V Veerrbbiinndduunnggeenn wwoorriinn RR WWaasssseerrssttooff or alkyl with one to six, preferably one to four carbon atoms.
- Particularly preferred groups A are -CH2-, -NH-, -N (CH3) -, -N (C2H5) -, - N (C 3 H 7 ) - and -N (C Hg) -.
- radicals R 21 are -N (CH3) 2, -N (C2H5) 2, -N (C3Hy) 2 or N (C 4 H 9 ) 2 .
- radicals R 18 are hydrogen, CH3, C2H5, C3H7 or
- Particularly preferred radicals R 19 are hydrogen, CH3, C2H5, C3H7 or C4H9. Particularly preferred radicals R 24 are hydrogen, CH3, C2H5, C3H7 or
- R18 and R19 are complementary j n the formulas IVa or IVb to a penta-, hexa- or heptacyclic ring, it can involve a saturated alkyl or a mono- or polyunsaturated alkylene groups.
- radicals are substituted in the above formulas, these are substituents which are inert under the respective reaction conditions.
- Preferred examples are organic radicals, such as alkyl, cycloalkyl, aryl or aralkyl, preferably having up to 12 carbon atoms, in particular alkyl having one to six carbon atoms, phenyl or benzyl.
- the radicals can be substituted one or more times, with one to four-fold substituted radicals being preferred.
- Synthesis process for the products of formulas I and II a migration of the 2 ' protective group from the 2 ' position to the 3 ' position of the pentopyranoside, also referred to there as migration reaction, is carried out.
- the 2 ' hydroxyl group is selectively released to give R1 equal to OH [cf. Formula I] or R " 1 'is equal to OH [cf. formula II], which in turn is now available for further reactions.
- the reactive pentopyranosylphosporamidites can be obtained by phosphitylation, which are used for the synthesis of the oligomeric pentopyranosyl nucleosides are needed.
- a ß-D-ribopyranosyl nucleoside Shown is the migration of an acyl radical (for example, a benzoyl group) from the 2 'position to the 3' position of a 4 'position with the protective group SG (for example, a trityl group) provided ß-D-ribo-pyranosyl-nucleoside (nucleobase B ).
- an acyl radical for example, a benzoyl group
- the protective group SG for example, a trityl group
- a benzoyl group is particularly preferably used as the migrating acyl group in the process described in DE-A-19741715 (Scheme 1):
- this reaction is achieved in a special embodiment in the presence of a base, in particular in the presence of N-ethyldiisopropylamine and / or triethylamine.
- the reaction can advantageously also be carried out in the same reaction vessel as a one-pot reaction.
- Example 1 which describes a synthesis of 1- ⁇ 3 ' -O-benzoyl-4 ' -O - [(4,4 ' - dimethoxytriphenyl) methyl] -ß-D-ribo-pyranosyl ⁇ thymine first tritylated the free 4 ' position and then benzoylated in the 2' position. Relatively large quantities of the following chemicals were then used for the migration reaction:
- FIG. 1 shows some typical examples of catalysts of the formula IVa or IVb (referred to there as compounds Va to Vf) which are commercially available and which can be used advantageously in the process according to the invention.
- Polymer-bound variants can also be used, such as. B. polymer bound TBD (Vc, from Aldrich number 35,875-4).
- Vc polymer bound TBD
- Polymer-bound catalysts can be easily separated by filtration. Most other highly effective catalysts, such as Va-d and Vf, can be easily removed by washing the organic reaction solution with water, provided that a water-immiscible solvent has been used or after the water-soluble solvent has been replaced by one.
- the catalyst of the formula IVa or IVb can be used at room temperature in amounts of 0.01 to 20 molar equivalents, preferably in amounts of 0.05 to 10 molar equivalents, particularly preferably in amounts of 0.1 to 0.99 molar equivalents, based on the amount on an unprotected output connection.
- Equimolar or superstoichiometric amounts for example 2-10 molar equivalents, can also be used, especially with inexpensive catalysts, if a very rapid reaction is desired.
- the reaction is usually carried out in an inert organic solvent or in suitable solvent mixtures, for example in tetrahydrofuran, methyl or ethyl acetate, N, N-dimethylformamide, dimethyl sulfoxide, diethyl ether, dioxane, acetonitrile, ethylene glycol dimethyl ether, benzene, toluene, dichloromethane or Dichloroethane, preferably in an inert, low-boiling solvent in which the reaction components can be easily dissolved at room temperature or with mild heating.
- an inert organic solvent or in suitable solvent mixtures for example in tetrahydrofuran, methyl or ethyl acetate, N, N-dimethylformamide, dimethyl sulfoxide, diethyl ether, dioxane, acetonitrile, ethylene glycol dimethyl ether, benzene, toluene, dichloromethane or Dichloroe
- the reaction temperature is usually from 0 ° C. to the boiling point of the solvent, preferably from 15 ° C. to 40 ° C., particularly preferably at room temperature around 20 ° C.
- reaction times are in the range of one to a few minutes, when using equimolar or superstoichiometric amounts of the catalyst IVa or IVb up to about 6-12 hours when using 0.01 to 0.99 molar equivalents.
- the starting compound is 1- ⁇ 2 '-O-benzoyl-4' -O - [(4,4 '-dimethoxytriphenyl) methyl] - .beta.-D-ribo-pyranosyl ⁇ thymine was benzoylation of 1- ⁇ 4' - O - [(4,4 ' - dimethoxy-triphenyl] methyl) -ß-D-ribo-pyranosyl ⁇ thymine with benzoyl chloride in
- Fig. 2 describes the time conversion of the migration reaction after HPLC determination.
- the activity of various catalysts, as shown in FIG. 2 was investigated.
- the 4 N-Benzoyl-1- ⁇ 2 '-O- benzoyl-4'-O - [(4,4' -dimethoxytriphenyl) methyl] -beta-D-ribo-pyranosyl ⁇ cytosine can either be obtained according to DE-A-19741715 (example 2 there) in 51% yield, or better, while completely avoiding the expensive column chromatography as a pure crystalline product, in 46% overall yield as follows:
- Tritylation and migration reaction in accordance with the present process according to the invention were not carried out as a one-pot reaction as recommended in DE-A-19741715 (example 2 there), since the desired end product can more conveniently be isolated purely without column chromatography. This is especially true because after the practically quantitative tritylation, by simply precipitating the intermediate product, all the excess reagents were already separable and therefore no chromatography was required even after the migration reaction:
- Example 3 course of the reaction in the synthesis of N-benzoyl-1- ⁇ 3 '-O-benzoyl-4' -O - [(4,4 dimethoxytriphenyl) methyl) -beta-D-ribo-pyranosyl ⁇ cytosine with catalysts of the formula (IV).
- Fig. 3 shows the results of the reaction of 1- ⁇ 2 '-O-benzoyl-4' -O - [(4,4 '- dimethoxytriphenyl) methyl) -beta-D-ribo-pyranosyl ⁇ cytosine for 1- ⁇ 3 ' -O-Benzoyl-4'- O - [(4,4'-dimethoxytriphenyl) methyl) -ß-D-ribopyranosyl ⁇ cytosine with 10% of a catalyst of formula (IV) at 22 ° C in ethyl acetate.
- the reaction could also be carried out with catalytic amounts of DBU (Va).
- the corresponding mixture gave 14.68 ⁇ l (0.098 mmol), ie 0.4 Molar equivalents DBU (Va), same result after 75 min reaction time.
- a conversion of 50% was determined after 2 hours by means of HPLC.
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Abstract
Description
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02719986A EP1370567A2 (de) | 2001-03-09 | 2002-03-07 | Verfahren zur herstellung von pentopyranosyl-nucleosiden |
US10/469,073 US20040068107A1 (en) | 2001-03-09 | 2002-03-07 | Method for the production of pentopyranosly nucleosides |
AU2002251062A AU2002251062A1 (en) | 2001-03-09 | 2002-03-07 | Method for the production of pentopyranosyl nucleosides |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10111681.0 | 2001-03-09 | ||
DE10111681A DE10111681A1 (de) | 2001-03-09 | 2001-03-09 | Verbessertes Verfahren zur Herstellung von Pentopyranosyl-Nucleosiden |
Publications (2)
Publication Number | Publication Date |
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WO2002072595A2 true WO2002072595A2 (de) | 2002-09-19 |
WO2002072595A3 WO2002072595A3 (de) | 2003-01-23 |
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ID=7677070
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/EP2002/002536 WO2002072595A2 (de) | 2001-03-09 | 2002-03-07 | Verfahren zur herstellung von pentopyranosyl-nucleosiden |
Country Status (5)
Country | Link |
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US (1) | US20040068107A1 (de) |
EP (1) | EP1370567A2 (de) |
AU (1) | AU2002251062A1 (de) |
DE (1) | DE10111681A1 (de) |
WO (1) | WO2002072595A2 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7700761B2 (en) | 1998-08-18 | 2010-04-20 | Nanogen Recognomics Gmbh | 3-deoxypentopyranosyl nucleic acid, its production and its use |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19741715A1 (de) * | 1997-09-22 | 1999-03-25 | Hoechst Ag | Pentopyranosyl-Nucleosid, seine Herstellung und Verwendung |
DE19815901A1 (de) * | 1998-04-08 | 1999-10-14 | Aventis Res & Tech Gmbh & Co | Verfahren zur Herstellung von Pentopyranosyl-Nucleosiden |
-
2001
- 2001-03-09 DE DE10111681A patent/DE10111681A1/de not_active Withdrawn
-
2002
- 2002-03-07 US US10/469,073 patent/US20040068107A1/en not_active Abandoned
- 2002-03-07 AU AU2002251062A patent/AU2002251062A1/en not_active Abandoned
- 2002-03-07 WO PCT/EP2002/002536 patent/WO2002072595A2/de not_active Application Discontinuation
- 2002-03-07 EP EP02719986A patent/EP1370567A2/de not_active Withdrawn
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7700761B2 (en) | 1998-08-18 | 2010-04-20 | Nanogen Recognomics Gmbh | 3-deoxypentopyranosyl nucleic acid, its production and its use |
Also Published As
Publication number | Publication date |
---|---|
WO2002072595A3 (de) | 2003-01-23 |
DE10111681A1 (de) | 2002-10-02 |
AU2002251062A1 (en) | 2002-09-24 |
EP1370567A2 (de) | 2003-12-17 |
US20040068107A1 (en) | 2004-04-08 |
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