Synthesis and properties of N-(alkenylidene)trifluoromethanesulfonamides


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Abstract

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 due to the presence of an acidic NH proton, which hampers formation of carbon-centered anion.

About the authors

B. A. Shainyan

Favorskii Irkutsk Institute of Chemistry, Siberian Branch

Author for correspondence.
Email: bagrat@irioch.irk.ru
Russian Federation, ul. Favorskogo 1, Irkutsk, 664033

L. L. Tolstikova

Favorskii Irkutsk Institute of Chemistry, Siberian Branch

Email: bagrat@irioch.irk.ru
Russian Federation, ul. Favorskogo 1, Irkutsk, 664033

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