Reaction of pentafluoro-2-azapropene with?,?-unsaturated alcohols
摘要:
Pentafluoro-2-azapropene reacts vigorously with beta, gamma-unsaturated alcohols in the presence of bases to give either the corresponding N-trifluoromethylcarbamates or the products of the vinyl substitution of the fluorine atoms at the azomethine bond. The intermediate azanions do not undergo [3,3]-sigmatropic rearrangement to give perfluoro-2-azapropenyl ethers.