Access to N-Difluoromethyl Amides, (Thio)Carbamates, Ureas, and Formamides

J Am Chem Soc. 2024 Jan 17;146(2):1276-1281. doi: 10.1021/jacs.3c13711. Epub 2024 Jan 5.

Abstract

The first efficient access to N-difluoromethyl amides, carbamates, thiocarbamates, ureas, formamides, and their derivatives is reported herein. The synthetic strategy relies on the initial synthesis and straightforward derivatization of N-CF2H carbamoyl fluorides, which were prepared through a desulfurization-fluorination of thioformamides (─NH─C(H)═S) coupled with carbonylation. The newly made N-CF2H carbonyl compounds proved to be highly robust and compatible with numerous chemical transformations and downstream derivatizations, underscoring the potential of this novel motif as a building block in complex functional molecules.