A new fluorine containing acyl anion equivalent 1,1 difluoro-2-lithio-
2-[(N,N-diethylcarbamato)-ethene 9 has been prepared and trapped with
a number of electrophiles in good yields. Transacylation of the first
formed lithium alkoxides releases a difluoroenolate, affording difluor
omethylketones upon work-up.