Process for synthesizing antithrombin inhibitor of non-asymmetric non-peptide kind

An antithrombin, non-peptide technology, applied in the field of synthesis of new antithrombin inhibitors, can solve the problems of high price, low total yield, low yield, etc. high yield effect

Inactive Publication Date: 2006-11-15
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Utilize this method, start with the raw material 1 with higher price, have used N,N-dimethylformamide (DMF) that post-treatment is troublesome as solvent to synthesize compound 2; Compound 4 is synthesized compound 5 under the effect

Method used

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  • Process for synthesizing antithrombin inhibitor of non-asymmetric non-peptide kind
  • Process for synthesizing antithrombin inhibitor of non-asymmetric non-peptide kind
  • Process for synthesizing antithrombin inhibitor of non-asymmetric non-peptide kind

Examples

Experimental program
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Example Embodiment

[0038] Example 1

[0039] Synthesis of 3-(pyridine-2-imine)-propionic acid ethyl ester (10)

[0040]Under nitrogen protection, add ethyl acrylate (27.5g, 0.275mol) to compound 9 (A=H, X=N)-2-aminopyridine (22.5g, 0.25mol), and stir and reflux for 24h at a temperature higher than 100℃ , The precipitate was filtered off, the residue was concentrated and purified with a silica gel column to obtain a white solid 10 (38 g, 72%).

[0041] Synthesis of 1-(4-cyano-aniline)-acetic acid (12)

[0042] Add 150ml of water to compound 11 (6.0g, 0.05mol) and 1-chloroacetic acid (10g, 0.11mol) and heat to reflux until a large amount of yellow solid precipitates out. Filter at room temperature and rinse with water, anhydrous ethanol, and anhydrous ether. After washing, 12 (6.4 g, 73%) is obtained as a yellow solid.

[0043] Synthesis of 4-aminomethyl-3-nitro-benzoic acid (1)

[0044] 150ml of 25%-30% methylamine aqueous solution was added to compound 13 (25g, 0.124mol), and the system was reacted ...

Example Embodiment

[0059] Example 2

[0060] Synthesis of 3-(4-fluorophenyl-1-imine)-propionic acid ethyl ester (10′)

[0061] Under nitrogen protection, add ethyl acrylate (27.5g, 0.275mol) to compound 9'(A=F, X=H)-4-fluoroaniline (23.5g, 0.25mol), add 10ml of absolute ethanol and 10ml of three Ethylamine was stirred and refluxed at a temperature higher than 100°C for 24 hours, the precipitate was filtered off, and the residue was concentrated and purified with a silica gel column to obtain a light red solid 10' (43g, 77%).

[0062] Synthesis of 3-[(4-aminomethyl-3-nitro-benzoyl)-(4-fluorobenzene)-2-imine]-propionic acid ethyl ester (3′)

[0063] Dissolve compound 10' (10.5g, 0.05mol) in 30ml CH 2 Cl 2 And 30ml triethylamine, slowly add the CH of compound 2 at room temperature 2 Cl 2 Solution. The mixed system was allowed to react at room temperature for 12 hours, the precipitate was filtered off, and the residue was concentrated and purified with a silica gel column to obtain a yellow oily liquid ...

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Abstract

A process for preparing the non-chiral non-peptide antithrombase depressants BIBR-953, BIBR-1048, etc from 3-nitro-4-chlorophenyl formic acid is disclosed. Said depressant contains 1,2,5-trisubstituted benzimdazole as central skeleton or a F atom.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and relates to a method for synthesizing inhibitors containing heterocyclic compounds, especially a novel antithrombin with 1,2,5-trisubstituted benzimidazole as the central skeleton or a fluorine atom Synthesis of Inhibitors. Background technique [0002] Thromboembolism is a leading cause of disease and death in Western societies. An important cause of this symptom is the overexpression of hemagglutination. Coagulation behavior involves two crucial steps, including: 1). Prothrombin complex activation generates thrombin; 2). Thrombin hydrolyzes fibrinogen to form insoluble fibrous coagulum. In addition, thrombin mediates platelet activation, which triggers a wide range of thrombogenic secondary effects, such as proliferation of vascular smooth muscle cells and fibroblasts, monocyte chemotaxis, and neutrophil adhesion. [0003] Current clinical anticoagulant therapy mainly includes the use of...

Claims

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Application Information

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IPC IPC(8): C07D401/12
Inventor 林国强马景毅徐亮孙逊孙智华王进义
Owner FUDAN UNIV
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