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Direct formylation of phenols using difluorocarbene as a safe CO surrogate†
Cong-Cong Feng,Song-Lin Zhang
Organic & Biomolecular Chemistry Pub Date : 12/19/2022 00:00:00 , DOI:10.1039/D2OB02128E
Abstract

A convenient method to prepare aryl formates is reported herein that exploits difluorocarbene to serve as a CO surrogate. This reaction is proposed to occur through a sequential O-difluoromethylation of phenol, followed by α-C–F bond functionalization of the resulting aryl difluoromethyl ether intermediate by phenol or moisture through fluorosemiacetal or orthoformate intermediates. Late-stage modification of biologically and materially active compounds is demonstrated.

Graphical abstract: Direct formylation of phenols using difluorocarbene as a safe CO surrogate
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