Process for the preparation of (S)-N-tert-butyl-1,2,3,4-tetrahydroisoquinoline-3-carboxyamide
申请人:Clariant LSM Italia S.p.A
公开号:US06340760B1
公开(公告)日:2002-01-22
A description is given here of a novel process for the synthesis of N-carboxyanhydride of formula VI
by reacting (3S)-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid with triphosgene in dioxane; a description is also given of a process for the synthesis of (S)-N-tert-butyl-1,2,3,4-tetrahydroisoquinoline-3-carboxyamide by treating the N-carboxyanhydride VI so obtained with tert-butylamine.
这里描述了一种新颖的合成N-羧酸酐VI的过程,其方法是将(3S)-1,2,3,4-四氢异喹啉-3-羧酸与三氯甲酰胺在二恶烷中反应;同时还描述了一种合成(S)-N-叔丁基-1,2,3,4-四氢异喹啉-3-羧酰胺的方法,该方法是将所得的N-羧酸酐VI与叔丁基胺处理。