A Selective Synthesis of 2,2-Difluorobicyclo[1.1.1]pentane Analogues: “BCP-F<sub>2</sub>”
作者:Xiaoshen Ma、David L. Sloman、Yongxin Han、David J. Bennett
DOI:10.1021/acs.orglett.9b02026
日期:2019.9.20
The bicyclo[1.1.1]pentane (BCP) motif has been utilized as bioisosteres in drug candidates to replace phenyl, tert-butyl, and alkynyl fragments in order to improve physicochemical properties. However, bceause of the difficulty of synthesis, most BCP analogues prepared only bear 1,3-“para”-substituents. We report the first selective synthesis of 2,2-difluorobicyclo[1.1.1]pentanes via difluorocarbene
双环[1.1.1]戊烷(BCP)基序已被用作候选药物中的生物等排体,以取代苯基,叔丁基和炔基片段,以改善其理化性质。然而,由于合成的困难,大多数制备的BCP类似物仅带有1,3-“对”取代基。我们报告通过二氟卡宾插入双环[1.1.0]丁烷中的第一个选择性合成2,2-二氟双环[1.1.1]戊烷。此外,这种方法应能激发通过类似机制合成其他“邻位/间位取代的” BCP的未来研究。