Mono- and difluorinations of sulfides were achieved using a novel fluorinating reagent, IF5–Et3N–3HF. The reagent is applicable for substrates having various electron-withdrawing groups, such as an ester, amide, ketone, nitrile, sulfone, or trifluoromethyl. Because more than one fluorine atom on IF5 is used, a large excess amount of the reagent is not necessary, even for the difluorination reaction.
Polyfluorination of Aryl Alkyl Sulfides by IF<sub>5</sub> with Concomitant Migration of the Arylthio Group
作者:Shinichi Ayuba、Tsuyoshi Fukuhara、Shoji Hara
DOI:10.1021/ol034912s
日期:2003.8.1
[reaction: see text] In the reaction of p-chlorophenyl alkyl sulfides with IF(5), polyfluorination reaction took place on the alkyl chain with the migration of the arylthio group. Consequently, p-chlorophenyl polyfluoroalkyl sulfides, having 3-7 fluorine atoms depending on alkyl chain length, could be obtained selectively.