Facile syntheses of gem-difluoroalkenes from chlorodifluoromethylketones
作者:Jean-Pierre Bégué、Danièle Bonnet-Delpon、Jonathan M. Percy、Michael H. Rock、Robin D. Wilkes
DOI:10.1039/c39950001857
日期:——
Chlorodifluoromethyl ketones reacted with diazomethane to afford epoxides in high yield; upon treatment with butyllithium, the epoxides underwent efficient ring opening to afford 3,3-difluoro-2-alkyl-alken-1-ols, suitable substrates for sigmatropic rearrangement leading to compounds containing a CF2 group in mid-chain.