Reaction of sulfene and dichloroketene with open??chain N, N??disubstituted α??aminomethyleneketones. Synthesis of 4??dialkylamino??3, 4??dihydro??5, 6??dimethyl??1, 2?? …

A Bargagna, P Schenone, F Bondavalli…

Index: Bargagna, Alberto; Schenone, Pietro; Bondavalli, Francesco; Longobardi, Mario Journal of Heterocyclic Chemistry, 1980 , vol. 17, p. 33 - 37

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Citation Number: 6

Abstract

Abstract Cycloaddition of sulfene to N, N-disubstituted 4-amino-3-methyl-3-buten-2-ones (III) occurred in fair to good yield only in the case of aliphatic N-substitution to give 4- dialkylamino-3, 4-dihydro-5, 6-dimethyl-1, 2-oxathiin 2, 2-dioxides, whereas N, N- disubstituted 1-amino-1-penten-3-ones (II) did not react at all. Cycloaddition of dichloroketene to II, III and N, N-disubstituted 4-amino-3-buten-2-ones occurred only in the ...