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。