作者:LoriAnn M. Lentsch、David F. Wiemer
DOI:10.1021/jo990388k
日期:1999.7.1
some Grignard reagents with β-keto phosphonates results in nucleophilic addition to the carbonyl group to afford β-hydroxy phosphonates with extension of the carbon skeleton. Additions of allylmagnesium reagents have proven particularly efficient, especially in the presence of BF3·OEt2. Reactions of allylic zinc reagents with β-keto phosphonates also gave the desired β-hydroxy phosphonates, often in even
一些格氏试剂与 β-酮膦酸酯的反应导致对羰基的亲核加成得到具有碳骨架延伸的 β-羟基膦酸酯。已证明添加烯丙基镁试剂特别有效,尤其是在 BF3·OEt2 存在的情况下。烯丙基锌试剂与 β-酮膦酸酯的反应也产生了所需的 β-羟基膦酸酯,通常产率更高。使用巴豆基和异戊二烯基有机金属试剂,反应以烯丙基转座进行。由于这些烯丙基化反应扩展了原始底物的功能,因此可以对初始产物进行各种转化,从而方便地获得各种新的膦酸酯。