1345824-05-6Relevant articles and documents
A Chiral Pentafluorinated Isopropyl Group via Iodine(I)/(III) Catalysis
Meyer, Stephanie,H?fliger, Joel,Sch?fer, Michael,Molloy, John J.,Daniliuc, Constantin G.,Gilmour, Ryan
, p. 6430 - 6434 (2021/02/26)
An I(I)/(III) catalysis strategy to construct an enantioenriched fluorinated isostere of the iPr group is reported. The difluorination of readily accessible α-CF3-styrenes is enabled by the in situ generation of a chiral ArIF2 species to forge a stereocentre with the substituents F, CH2F and CF3 (up to 95 %, >20:1 vicinal:geminal difluorination). The replacement of the metabolically labile benzylic proton results in a highly preorganised scaffold as was determined by X-ray crystallography (π→σ* and stereoelectronic gauche σ→σ* interactions). A process of catalyst editing is disclosed in which preliminary validation of enantioselectivity is placed on a structural foundation.