SPANphos Ligands in Palladium-Catalyzed Asymmetric Fluorination
作者:Olivier Jacquet、Nicolas D. Clément、Carolina Blanco、Marta Martinez Belmonte、Jordi Benet-Buchholz、Piet W. N. M. van Leeuwen
DOI:10.1002/ejoc.201200223
日期:2012.9
The synthesis of new enantiopure wide-bite-angle diphosphanes is described as well as their use in the palladium-catalyzedasymmetricfluorination of α-cyanoacetates. Enantiomeric excesses up to 93 % were obtained when Pd(OAc) 2 -SPANphos was used as catalyst for the fluorination of ethyl 2-cyano-2-phenylacetate with N-fluorobenzenesulfonimide (NFSI).