Enantioselective Synthesis of (1R,2S)-1-Amino-2-vinylcyclopropanecarboxylic Acid Ethyl Ester (Vinyl-ACCA-OEt) by Asymmetric Phase-Transfer Catalyzed Cyclopropanation of (E)-N-Phenylmethyleneglycine Ethyl Ester
摘要:
A concise asymmetric synthesis of (1R,2S)-1-amino-2-vinylcyclopropanecarboxylic acid ethyl ester, a key intermediate in the preparation of many hepatitis C virus inhibitors, is described. Stereoselective cyclopropanation of (E)-N-phenylmethyleneglycine ethyl ester was effected by treatment with trans-1,4-dibromo-2-butene in the presence of a catalytic amount of a chiral phase-transfer catalyst. Microscale high-throughput experimentation techniques were successfully used to identify a cinchonidine-derived catalyst that provided (1R,2S)-1-(E)-N-phenylmethylene-amino-2-vinylcyclopropanecarboxylic acid ethyl ester in up to 84% cc. This was translated to a lab scale process to attain 78% yield and 77.4% cc. Chiral purity upgrade and isolation of the ester was accomplished via preparatory supercritical fluid chromatography followed by crystallization of the ester as its tosylate salt. The improved synthesis described herein represents a potentially more economical preparation of this valuable intermediate.
[EN] MACROCYCLIC SERINE PROTEASE INHIBITORS<br/>[FR] INHIBITEURS MACROCYCLIQUES DE LA SÉRINE PROTÉASE
申请人:IDENIX PHARMACEUTICALS INC
公开号:WO2009014730A1
公开(公告)日:2009-01-29
Provided herein are macrocyclic serine protease inhibitor compounds, for example, of Formula I, pharmaceutical compositions comprising such compounds, and processes of preparation thereof. Also provided are methods of their use for the treatment of an HCV infection in a host in need thereof.
The present invention provides compounds, pharmaceutically acceptable compositions thereof, and methods of using the same.
本发明提供了化合物、药学上可接受的组合物以及使用它们的方法。
[EN] MACROCYCLIC INHIBITORS OF HEPATITIS C PROTEASE<br/>[FR] INHIBITEURS MACROCYCLIQUES DE LA PROTÉASE DU VIRUS DE L'HÉPATITE C
申请人:PHENOMIX CORP
公开号:WO2010033466A1
公开(公告)日:2010-03-25
The invention provides macrocyclic compounds inhibitory to the Hepatitis C viral protease, compositions and combinations including the compounds, methods of treatment of conditions wherein inhibition of the Hepatitis C viral protease is medically indicated, and methods of treatment of a Hepatitis C viral infection in a human patient.
The invention is an algorithm and method for designing an inhibitor that covalently binds a target polypeptide. The algorithm and method can be used to rapidly and efficiently convert reversible inhibitors into irreversible inhibitors.
The present invention relates to enzyme inhibitors. More specifically, the present invention relates to ligand-directed covalent modification of proteins; method of designing same; pharmaceutical formulation of same; and method of use.