stereoselective routes towards isopropenylcyclopropanes have been devised. Secondary cis-isopropenylcyclopropylcarbinols have been obtained either by regio- and stereoselective hydroxy-directed cyclopropanation of the corresponding dienols or from bicyclic cyclopropyl lactones derived from intramolecular cyclopropanation of allylic diazoacetates. Contrary to previous reports, base-induced 1,3-elimination of γ-epoxy
已经设计了通往异
丙烯基
环丙烷的有效立体选择性路线。已经通过相应二烯醇的区域和立体选择性羟基定向
环丙烷化或从烯丙基
重氮乙酸酯的分子内
环丙烷化衍生的双环环丙基内酯获得二级顺式-异
丙烯基
环丙基甲醇。与之前的报道相反,γ-环氧酮的碱诱导 1,3-消除已被证明可以提供反式-2-(羟甲基)环丙基酮,并且已经重新研究了这些化合物的反应性。