N-Alkenylidenetrifluoromethanesulfonamides TfN=CH–CR=C(Me)R′ (R, R′ = H, Me) have been synthesized by reaction of N-sulfinyltrifluoromethanesulfonamide TfNSO with (E)-but-2-enal, (E)-2-methylbut- 2-enal, and 3-methylbut-2-enal. Despite greater stability of N-alkenylidenetrifluoromethanesulfonamides relative to their propargyl isomers TfNHCH2C≡CR, no rearrangement of the latter into the former occurs
Ñ -Alkenylidenetrifluoromethanesulfonamides TFN = CH-CR = C(Me)的R'(R,R'= H,Me)的已通过的反应合成Ñ与(-sulfinyltrifluoromethanesulfonamide TfNSO ë) -丁-2-烯醛,(ë) - 2-甲基丁-2-烯醛和3-甲基丁-2-烯醛。尽管相对于其炔丙基异构体TfNHCH 2 C = CR,N-烯基亚乙基
三氟甲烷磺酰胺的稳定性更高,但由于存在酸性NH质子,后者没有重排成前者,这阻碍了以碳为中心的阴离子的形成。