Weinreb amide based synthetic equivalents for convenient access to 4-aryl-1,2,3,4-tetrahydroisoquinolines
作者:Harikrishna Kommidi、Sivaraman Balasubramaniam、Indrapal Singh Aidhen
DOI:10.1016/j.tet.2010.03.074
日期:2010.5
N-methoxy-N-methyl-N′-benzyl-N′-tert-butyloxy carbonyl glycinamide based on WA functionality were developed for the convenient synthesis of 4-aryl-1,2,3,4-tetrahydroisoquinoline framework. Two simple reactions, N-benzylation and addition of arylmagnesium halide on the WA functionality of the former afforded the key intermediate for convenient synthesis of N-phenylsulfonyl protected 4-aryl-1,2,3,4-tetrahydroisoquinoline
新的合成的等同物,Ñ甲氧基Ñ甲基Ñ ' -苯磺酰基甘氨酰胺和Ñ甲氧基Ñ甲基Ñ ' -苄基- ñ ' -叔-butyloxy羰基于WA功能甘氨酰胺被用于的方便合成开发4-芳基-1,2,3,4-四氢异喹啉骨架。两个简单的反应,N-苄基化和芳基卤化镁在前者的WA功能上的加成提供了方便合成N的关键中间体-苯磺酰基通过还原和酸促进的环化作用来保护4-芳基-1,2,3,4-四氢异喹啉。对于后者,在WA官能团上添加卤化芳基镁,然后按照相同的方案,以良好的产率直接合成了4-芳基-1,2,3,4-四氢异喹啉。酸促进的环化步骤能够同时去除N -Boc保护。