Ligand-free copper-catalyzed borylative defluorination: access to gem-difluoroallyl boronic acid derivatives?

Organic & Biomolecular Chemistry Pub Date: 2021-09-22 DOI: 10.1039/D1OB01533H

Abstract

We report a ligand-free copper-catalyzed β-borylation, defluorination of β-substituted, α-trifluoromethyl-α,β-unsaturated esters. The reaction affords geminal-difluoroallyl boronic acid derivatives in moderate to good yield. The reaction was tolerant of various substrates, and the utility of products was demonstrated in the defluorinative functionalization of the difluoroalkene to afford enol ethers.

Graphical abstract: Ligand-free copper-catalyzed borylative defluorination: access to gem-difluoroallyl boronic acid derivatives
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