Preparation of 2-substituted pyrroles and indoles by regioselective alkylation and deprotection of 1-(2-trimethylsilylethoxymethyl)pyrrole and 1-(2-trimethylsilylethoxymethyl) indole
作者:Martin P. Edwards、Annette M. Doherty、Steven V. Ley、Helen M. Organ
DOI:10.1016/s0040-4020(01)87342-7
日期:1986.1
After N-alkylation of pyrrole and indole with 2-trimethylsilylethoxymethyl chloride the products of the reaction could be regioselectively deprotonated with n-butyllithium at the 2-position. Reaction of the resulting anions with acid chlorides, lactones, silyl chlorides or aldehydes gave addition products, some of which were deprotected to the parent pyrrole or indole using anhydrous tetra--butylammonium
在吡咯和吲哚用2-三甲基甲硅烷基乙氧基甲基氯进行N-烷基化反应后,可以在2-位用正丁基锂对反应产物进行区域选择性去质子化。所得阴离子与酰氯,内酯,甲硅烷基氯或醛反应,得到加成产物,其中一些用无水四丁基氟化铵脱保护成母体吡咯或吲哚。