The Generation of Difluoroketenimine and Its Application in the Synthesis of α,α‐Difluoro‐β‐amino Amides
作者:Rui Zhang、Zhikun Zhang、Qi Zhou、Lefei Yu、Jianbo Wang
DOI:10.1002/anie.201901591
日期:2019.4.16
Fluorine‐containing β‐amino acids and their derivatives have attracted significant attention due to their importance in life sciences. Herein the previously unknown difluoroketenimine, the analogue of the elusive difluoroketene, has been generated by the reaction of difluorocarbene and isocyanide, which further undergoes [2+2] cycloaddition with imine. The three‐component reaction affords α,α‐difluoro‐β‐amino amides
A new and efficient method was developed for the synthesis of novel gem-difluoromethylene-containing isocyanide, which can be used as a building block for the synthesis of difluorinated pseudopeptides via Ugi reaction. (C) 2009 Elsevier Ltd. All rights reserved.