Light-mediated copper-catalyzed phosphorus/halogen exchange in 1,1-difluoroalkylphosphonium salts
作者:Liubov I. Panferova、Vitalij V. Levin、Marina I. Struchkova、Alexander D. Dilman
DOI:10.1039/c8cc09115c
日期:——
A method for the assembly of the halodifluoromethyl group (CF2X, X = Cl, Br, I) is described. The reaction involves the light-mediated substitution of the triphenylphosphine by halide anions in readily accessible gem-difluorinated phosphonium salts.
Nucleophilic Bromo- and Iododifluoromethylation of Aldehydes
作者:Mikhail D. Kosobokov、Vitalij V. Levin、Marina I. Struchkova、Alexander D. Dilman
DOI:10.1021/ol501674n
日期:2014.7.18
A method for bromo- and iododifluoromethylation of aldehydes using bromo- and iodo-substituted difluoromethyl silicon reagents (Me3SiCF2X) is described. The reaction is performed in the presence of a combination of tetrabutylammonium and lithium salts Bu4NX/LiX (X = Br or I) in propionitrile. It is believed that, in this process, a short-lived halodifluoromethyl carbanion serves as nucleophile, which