Attempted synthesis of a tenidap isomer and formation of an unexpected stable water adduct
作者:Klára Esses-Reiter、József Reiter
DOI:10.1002/jhet.5570370441
日期:2000.7
An attempt to synthesize the Tenidap isomer 13 was performed starting from 2-ethoxy-5-chloroindole (9). The acylation and carbamoylation reactions of 9 led to the expected intermediate 12, however the hydrolysis of 12 in acidic or alkaline media did not yielded the expected 13. Instead an unusually stable water adduct 18 or the cleavage product 16 was formed. The formation of the unexpectedly stable
从2-乙氧基-5-氯吲哚(9)开始尝试合成替尼达普异构体13。9的酰化和氨基甲酰化反应产生预期的中间体12,但是12在酸性或碱性介质中的水解未产生预期的13。相反,形成了异常稳定的水加合物18或裂解产物16。异常稳定的水加合物18的形成是由位置1上的噻吩酰基的空间和电子效应引起的,水解10和16证明了这一点。