<i>gem</i>-Halofluorocyclopropanes via [2 + 1] Cycloadditions of In Situ Generated CFX Carbene with Alkenes
作者:Colby Barrett、Vinayak Krishnamurti、Xanath Ispizua-Rodriguez、Ziyue Zhu、Christopher J. Koch、G. K. Surya Prakash
DOI:10.1021/acs.orglett.2c02126
日期:2022.7.29
developed. The method employs ethyl dibromofluoroacetate (EDBFA) as an accessible and inexpensive source of the bromofluorocarbene (:CFBr) intermediate. The protocol provides the bromofluorocyclopropane products in excellent yields, including examples synthesized in multigram scales. The chlorinated ester, ethyl dichlorofluoroacetate (EDCFA), is also utilized to make the analogous gem-chlorofluorocyclopropanes
已开发出一种在温和条件下有效且操作简单的偕溴氟环丙烷合成方法。该方法使用二溴氟乙酸乙酯 (EDBFA) 作为溴氟卡宾 (:CFBr) 中间体的可获取且廉价的来源。该协议以优异的产量提供溴氟环丙烷产品,包括以多克规模合成的示例。氯化酯二氯氟乙酸乙酯 (EDCFA) 也用于制造类似的宝石-氯氟环丙烷。