Reaction of imidazole derivatives with trifluoromethylated arylacetylenes

Highly regio- and stereocontrolled preparation of α-(trifluoromethyl)-β-(phenylthio) enamines by the hydroamination of in situ-synthesized 1-(trifluoromethyl)-2-(phenylthio)ethyne

Various nitrogen nucleophiles were easily added to in situ-generated 1-(trifluoromethyl)-2-(phenylthio)ethyne to afford the corresponding trifluoromethyl enamines in good-to-high yields and with high regio- and stereocontrol under very mild conditions.

General and selective syn-carboxylation-trifluoromethylation of terminal alkynes: application to the late-stage modification of dehydrocholic acid

A general and selective syn-carboxylation-trifluoromethylation across the triple bond of terminal alkynes is developed by virtue of a reactive Cu(iii)–CF₃ complex, which produces a broad range of biologically active trifluoromethylated enol esters with excellent regio- and stereoselectivity.