A simple strategy avoiding the decomposition of a naked trifluoromethyl anion to difluorocarbene by a sterically very demanding organo-superbase without the help of a trifluoromethyl anion reservoir such as DMF is reported. The direct non-metallic trifluoromethylation of carbonyl compounds using fluoroform in the presence of t-Bu-P4 base afforded trifluoromethyl alcohols in high yields.
The regioselective synthesis of pyrazole triflones has been achieved by 1,3-dipolar cycloaddition of triflyl alkynes and hydrazonoyl chloride in the presence of Hünig's base. Pyrazolo[5,1-a]isoquinoline triflones were also regioselectively synthesized for the first time via tandem 1,3-dipolar cycloaddition/oxidative aromatization between triflyl alkynes and C,N-cyclic azomethine imines.
International audienceA new palladium-catalyzed decarboxylative allylation of allyl α-trifluoromethyl-β-keto esters was developed in the presence of tris(dibenzylideneacetone)dipalladium [Pd2(dba)3] and 1,2-bis(diphenylphosphino)ethane (dppe) in THF. α-Trifluoromethyl ketones featuring a quaternary carbon center were produced in good yields and the dreaded α,β-unsatd.-β,β-difluoro ketones resulting from β-elimination of a fluoride ion were not obsd
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.