Asymmetric synthesis of trans-disubstituted aryl-vinyl epoxides: a p-methoxy effect
作者:A Solladié-Cavallo、L Bouérat、M Roje
DOI:10.1016/s0040-4039(00)01222-3
日期:2000.9
It was found that trans-aryl-vinyl epoxides could be synthesized with 77–100% conversion from conjugated aldehydes (which could also behave as Michael acceptors and lead to cyclopropanes) and chiral sulfonium salts with ee's ranging from 95 to 100%. When a p-methoxy group was present on the arylsulfonium salt, the epoxide was the sole product whatever the solvent.
研究发现,可以从共轭醛(也可以充当迈克尔受体并生成环丙烷)和ee范围从95%到100%的手性sulf盐以77-100%的转化率合成反式-芳基-乙烯基环氧化物。当芳基ulf盐上存在对甲氧基时,无论使用哪种溶剂,环氧化物都是唯一的产物。