“…Trifluoroethanol has been widely used as an inexpensive starting material for prepation of 2,2-difluoro enol derivatives [4]. More recently, a novel C-F bond cleavage chemistry with trifluoromethyl compounds has been developed by Uneyama and co-workers, which significantly expanded both the preparation and the synthetic applications of 2,2-difluoro enol building blocks [5,9]. However, compared to the 2,2-difluoro enol silyl ethers, 2,2-difluoro enol carboxylic esters are less explored [6,8].…”