Abstract

AbstractThe 1,3‐dipolar cycloadditions of C,N‐diphenylnitrone, C‐phenyl‐N‐methylnitrone, triphenylnitrone, mesitylnitrile oxide and tetracyanocarbonyl ylide with 1,1‐difluoroallene (DFA) are reported and discussed with respect to regiochemistry. Each of the dipoles adds exclusively to the C2—C3, non‐fluorine‐substituted π‐bond of DFA. The nitrones all undergo regiospecific reactions while mesitylnitrile oxide does not. The results are discussed with respect to FMO theory and other factors which can give rise to regiochemical variation.

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