Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... The treatment of α-trifluoromethyl styrene with organolithium reagents results in the selective formation of gem-difluoroalkenes in good to excellent yield. This reaction has been applied to the synthesis of a range functionalised gem-difluoroalkenes.