β-Vinyl-β-propiolactone reacts regio- and stereoselectively with an enolate equivalent such as cuprate derivatives of N,N-dimethylhydrazones and their bromomagnesium derivatives in the presence of a copper(I) catalyst to afford 7-oxo-(E)-3-alkenoic acids in high yields.
β-
乙烯基-
β-丙内酯在
铜(I)催化剂的存在下,区域选择性和立体选择性地与烯醇等价物(例如N,N-二甲基
脲的
铜衍
生物及其
溴镁衍
生物)反应,以高产率生成7-氧代-(E)-3-烯酸。