Facile air-oxidation of N-homopiperonyl-5,6-dimethoxyhomophthalimide: simple and efficient access to nuevamine
作者:Prasad B. Wakchaure、Srinivasan Easwar、Vedavati G. Puranik、Narshinha P. Argade
DOI:10.1016/j.tet.2007.11.104
日期:2008.2
six-step synthesis of naturally occurring (±)-nuevamine with 55% overall yield has been described, starting from methyl 2-(6-formyl-2,3-dimethoxyphenyl)acetate via the quantitative benzylic air-oxidation of the corresponding N-homopiperonyl-5,6-dimethoxyhomophthalimide to N-homopiperonyl-5,6-dimethoxyisoquinoline-1,3,4-trione as the key reaction, followed by base catalyzed regioselective alcoholysis of the
已经描述了一种容易的六步合成天然(±)-新胺的方法,其总产率为55%,它是从2-(6-甲酰基-2,3-二甲氧基苯基)乙酸甲酯开始,通过相应的苄基空气氧化定量N-高哌啶基-5,6-二甲氧基高邻苯二甲酰亚胺以N-高哌啶基-5,6-二甲氧基异喹啉-1,3,4-三酮为关键反应,随后碱催化三酮的区域选择性醇解,并发生环收缩,酸催化脱水闭环内酰胺的形成和脱羧途径。