NOVEL PROCESSES FOR PREPARING (S)-4-AMINO-HEPTA-5,6-DIENOIC ACID AND INTERMEDIATES THEREOF
申请人:MERRELL PHARMACEUTICALS INC.
公开号:EP0705240A1
公开(公告)日:1996-04-10
[EN] NOVEL PROCESSES FOR PREPARING (S)-4-AMINO-HEPTA-5,6-DIENOIC ACID AND INTERMEDIATES THEREOF<br/>[FR] NOUVEAUX PROCEDES DE PREPARATION D'ACIDE (S)-4-AMINO-HEPTA-5,6-DIENOIQUE ET DES INTERMEDIAIRES DE CELUI-CI
申请人:MERRELL PHARMACEUTICALS INC.
公开号:WO1995000470A1
公开(公告)日:1995-01-05
(EN) The present invention relates to novel enantiospecific processes for preparing (S)-4-amino-hepta-5,6-dienoic acid and pharmaceutically acceptable salts thereof, which is useful as an irreversible inhibitor of GABA-T, to novel intermediates thereof, and a process for preparing an intermediate thereof.(FR) La présente invention concerne un nouveau procédé énantio-spécifique de préparation d'acide (S)-4-amino-hepta-5,6-diénoïque et de sels pharmaceutiquement acceptables de celui-ci. Ces composés sont utiles comme inhibiteurs irréversibles du GABA-T. L'invention concerne également de nouveaux intermédiaires de ces composés, et leur procédé de préparation.
Free radical cyclizations in alkaloid synthesis: (+)-heliotridine and (+)-hastanecine
作者:Joong-Kwon Choi、David J. Hart
DOI:10.1016/s0040-4020(01)97176-5
日期:1985.1
hydride and AIBN affords mixtures of reduction and cyclization products. Cyclization products partition between indolizidinones and pyrrolizidinones depending on the terminal alkyne substituent. When the terminal substituent is a trimethylsilyl group, synthetically useful yields of pyrrolizidinones are obtained. Applications of this chemistry to the synthesis of (+)-heliotridine (2) and (+)-hastanecine (3)