Stereoselective reactions of α,β-epoxy-aldehydes; the formation of “chelation controlled” products
作者:Shouming Wang、Graham P. Howe、Ravinderjit S. Mahal、Garry Procter
DOI:10.1016/s0040-4039(00)92086-0
日期:1992.6
Treatment of the α,β-epoxy-aldehydes (1) and (2) with Lewis acids followed by in situ reaction with carbon nucleophiles produces halohydrins of the products of “chelation controlled” addition to the aldehyde with high diastereoselectivity; The regiochemistry of epoxide opening is determined by choice of Lewis acid.
用路易斯酸处理α,β-环氧-醛(1)和(2),然后与碳亲核试剂原位反应,产生“螯合控制”的产物的卤代醇,该醛具有高的非对映选择性;通过选择路易斯酸来确定环氧化物开口的区域化学。