Reaction of sulfene with heterocyclic N, N??disubstituted α??aminomethyleneketones. X. Synthesis of thieno [2, 3??h]??1, 2??benzoxathiin derivatives

…, P Schenone, G Menozzi, G Romussi

Index: Mosti, Luisa; Schenone, Pietro; Menozzi, Giulia; Romussi, Giovanni Journal of Heterocyclic Chemistry, 1982 , vol. 19, p. 1057 - 1059

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Citation Number: 5

Abstract

Abstract The polar 1, 4-cycloaddition of sulfene to N, N-disubstituted (E) 5-aminomethylene- 6, 7-dihydrobenzo [b]-thiophen-4 (5H) ones II gave in excellent yield and only in the case of aliphatic N-substitution, N, N-disubstituted 4-amino-3, 4, 5, 6-tetrahydrothieno [2, 3-h]-1, 2- benzoxathiin 2, 2-dioxides III, which are derivatives of the new heterocyclic system thieno [2, 3-h]-1, 2-benzoxathiin. Dehydrogenation with DDQ of cycloadducts IIIa-d was successful ...