thane has been demonstrated to be a highly versatile gem-difluoromethylene (CF2) buildingblock via the reaction of difluorophenylsulfanylmethyl radical with olefins. gem-Difluoroalkenes and products containing a midchain CF2 group and with manipulatable functionality can be readily synthesized. The first example of a gem-difluoromethylene radical synthon is also reported.
Electrophilic Difluoro(phenylthio)methylation: Generation, Stability, and Reactivity of α-Fluorocarbocations
作者:Nolan M. Betterley、Panida Surawatanawong、Samran Prabpai、Palangpon Kongsaeree、Chutima Kuhakarn、Manat Pohmakotr、Vichai Reutrakul
DOI:10.1021/ol402631t
日期:2013.11.15
Electrophilic difluoro(phenylthio)methylation of allylsilanes has been achieved using bromodifluoro(phenylthio)methane (PhSCF2Br) and silver hexafluoroantimonate (AgSbF6). The structural assignment and observation of alpha-fluorocarbocation were substantiated by NMR and theoretical calculations. Detailed mechanistic and electronic studies have provided a fundamental understanding of the reactivity and stability of the difluoro(phenylthio)methylium cation (PhSCF2+).