[3+2] cycloadditions with 1,2-difluorovinylphenylsulfone

Abstract

[3+2] Cycloaddition reactions of (E) and (Z)-1,2-difluorovinylphenylsulfones with diphenylnitrone, ethyl- and mesitylnitrile oxides and diphenylnitrile imine have been studied. The behaviour of these new dipolarophiles has been compared to that of the related phenylvinylsulfone and 1-fluorovinylphenylsulfone