Photochemical reaction of N-substituted 1, 6-dihydro-3 (2H)-pyridinones (1) with vinyl acetate resulted in predominant formation of head-to-tail adducts with small amounts of head-to-head adducts. The head-to-tail adduct derivatives (22 and 30) were transformed into lactones (24 and 34), which were further derived to the 4-N, N-dimethyl-carbamoylmethyl-1, 6-dihydro-3 (2H)-pyridinones (2a and 2b, respectively).
N-取代的 1,6-二氢-3 (2H)-
吡啶酮(1)与
乙酸乙烯酯发生光
化学反应后,主要形成头尾加合物,并有少量头对头加合物。头尾加合物衍
生物(22 和 30)转化为内酯(24 和 34),再进一步衍生为 4-N,N-二甲基
氨基甲酰基甲基-1,6-二氢-3 (2H)-
吡啶酮(分别为 2a 和 2b)。