Dichotomous Reactivity in the Reaction of Triethyl- and Triphenylphosphane HBr Salts with Dimethyl Acetals: A Novel Entry to α-Alkoxy-Functionalized Ylides and General Synthesis of Vinyl Ethers and Alkoxy Dienes
作者:Priyabrata Das、James McNulty
DOI:10.1002/ejoc.201000601
日期:2010.7
discovery of dichotomous reactivity in the reaction of trialkyl- vs. triphenylphosphane HBr salts with acetals allows entry to functionalized α-methoxy phosphonium salts and a novel process for tertiary phosphane methylation. The new protocol opens a general entry to the synthesis of vinyl ethers and differentially substituted 1,3-dienes via Wittig reactions of the functionalized ylides derived from
三烷基与三苯基膦 HBr 盐与缩醛反应中二分反应性的发现允许进入官能化的 α-甲氧基鏻盐和叔膦甲基化的新方法。新协议打开了合成乙烯基醚和差异取代的 1,3-二烯的通用入口,通过来自 α-甲氧基鏻盐的官能化叶立德的 Wittig 反应。