Asymmetric Epoxidation of α-Substituted Acroleins Catalyzed by Diphenylprolinol Silyl Ether
作者:Bojan P. Bondzic、Tatsuya Urushima、Hayato Ishikawa、Yujiro Hayashi
DOI:10.1021/ol102269s
日期:2010.12.3
Asymmetric epoxidation of α-substituted acroleins with hydrogen peroxide has been catalyzed by diphenylprolinol diphenylmethylsilyl ether to afford α-substituted-β,β-unsubstituted-α,β-epoxy aldehyde with excellent enantioselectivity and the generation of a chiral quaternary carbon center. The method was applied to a short synthesis of (R)-methyl palmoxirate.
二苯基脯氨醇二苯基甲基甲硅烷基醚已催化过氧化氢对α-取代的丙烯醛进行不对称环氧化,得到具有优异对映选择性和手性季碳中心的α-取代-β,β-未取代-α,β-环氧醛。该方法用于(R)-棕榈酸甲酯的短合成。