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'
对苯醌(1)与几种有机锂化合物(甲基-乙基-正丁基-苯基苯基)的反应在用水水解后导致生成相应的粗二醇4,将其依次用氢化钠和碘甲烷处理,得到预期的1 ,以立体选择性的方式,1,4-二烷基-1,4-二甲氧基环己-2,5-二烯2a-d。使用具有两种不同的有机锂试剂的串联方法,然后通过相同的方法进行甲基化,从而立体选择性地产生了混合的1-烷基-4-烷基′衍生物2e,f。