o-Thioquinone methide reacted with enamines to give [4+2] cycloadduct in good yield. In the case of morpholinoenamine, 1 : 2 adduct was obtained. Thiobenzoylketene thioacetals underwent dimerization accompanied by concomitant desulfurization upon reaction with 1-(1-pyrrolidinyl)cyclohexene. The reaction mechanism of these reactions were discussed. Some other reactions of thioacylketene thioacetals with enamines were also described.
o-Thioquinone methide 与烯胺反应生成 [4+2] 环加合物,收率很高。在吗啉烯胺的情况下,得到了 1 : 2 的加合物。
硫代苯甲酮
硫代
乙醛在与 1-(1-
吡咯烷基)
环己烯反应时会发生二聚化,并同时脱
硫。讨论了这些反应的反应机理。此外,还介绍了
硫代酮
硫代
乙醛与烯胺的其他一些反应。