Stereoselective two-step chemical preparation of 1,4-dialkyl-1,4-dimethoxycyclohexa-2,5-dienes
作者:Francisco Alonso、Miguel Yus
DOI:10.1016/s0040-4020(01)89749-0
日期:1991.8
phenyllithium) led after hydrolysis with water to the corresponding crude diols 4 which were successively treated with sodium hydride and methyl iodide yielding the expected 1,4-dialkyl-1,4-dimethoxycyclohexa-2,5-dienes 2a-d in a stereoselective manner. The use of a tandem process with two different organolithium reagents followed by methylation by the same procedure yielded stereoselectively the mixed 1-alkyl-4-alkyl'