<i>gem</i>-Difluorination of Methylenecyclopropanes (MCPs) Featuring a Wagner–Meerwein Rearrangement: Synthesis of 2-Arylsubstituted <i>gem</i>-Difluorocyclobutanes
作者:Peng-Peng Lin、Long-Ling Huang、Si-Xin Feng、Shuang Yang、Honggen Wang、Zhi-Shu Huang、Qingjiang Li
DOI:10.1021/acs.orglett.1c00767
日期:2021.4.16
The protocol proceeds via a Wagner–Meerwein rearrangement with mild reaction conditions, good functional group tolerance, and moderate to good yields. The product could be readily transformed to gem-difluorocyclobutane-containing carboxylic acid, amine, and alcohol, all of which are useful building blocks for biologically active molecule synthesis.
双氟二氟环丁烷双核是药物化学中有价值的结构元素。宝石-二氟环丁烷的策略,特别是2-取代的情况,是局限性的,并且常常遭受苛刻的反应条件。本文报道了用于合成2-芳基取代的宝石-二氟环丁烷的芳基取代的亚甲基环丙烷(MCP)的迁移性宝石-二氟化。使用市售的Selectfluor(F-TEDA-BF 4)和Py·HF作为氟源。该方案通过Wagner-Meerwein重排进行,反应条件温和,官能团耐受性好,产率中等至良好。该产品可以很容易地转化为宝石含-二氟环丁烷的羧酸,胺和醇,它们都是生物活性分子合成的有用组成部分。