A new photochemical synthesis of cyclopropanecarboxylic acids present in pyrethroids by the aza-di-π-methane rearrangement
作者:Diego Armesto、Mar G. Gallego、William M. Horspool、Antonia R. Agarrabeitia
DOI:10.1016/0040-4020(95)00527-f
日期:1995.8
A novel synthetic route to chrysanthemic acid, 2-cyclopentylidenmethyl-3,3-dimethylcyclopropanecarboxylic acid, fluorenespiro-2,2-dimethylcyclopropanecarboxylic acid and indenespiro-2,2-dimethylcyclopropanecarboxylic acid, all of them present in pyrethroids of known insecticidal activity, is described. The key step in the synthesis is the aza-di-n-rnethane rearrangement of some 1-aza-1,4,6-trienes
描述了一种新的合成方法,可以合成菊酸,2-环戊二烯基-3,3-二甲基环丙烷羧酸,芴螺-2,2-二甲基环丙烷羧酸和茚螺-2,2-二甲基环丙烷羧酸,它们都存在于已知具有杀虫活性的拟除虫菊酯中。合成中的关键步骤是使用三重态敏化对一些1-aza-1,4,6-三烯和一些1-aza-1,4-二烯进行aza-di-n-乙烷重排。