Abstract
We report a safe and readily prepared reagent [1,1′-biphenyl]-4-yl 2-bromo-2,2-difluoroacetate (BBDFA) for Cu-catalyzed trifluoromethylation of allylic or benzylic alcohols. An operationally simple and column-chromatography-free process to prepare BBDFA was developed and demonstrated on >100 g scale. Detailed reaction calorimetry and thermal analysis of the deoxytrifluoromethylation were performed using cinnamyl alcohol as a model substrate, demonstrating that the reactions could be safely implemented on preparative scale.
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