Synthesis of Isopropenylcyclopropanes − Revision of the Relative Configuration of Cyclopropyl Ketones Obtained by 1,3-Elimination of γ-Epoxy Ketones
作者:Janine Cossy、Nicolas Blanchard、Christophe Meyer
DOI:10.1002/1099-0690(200101)2001:2<339::aid-ejoc339>3.0.co;2-j
日期:2001.1
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。