1,6-Dihydro-3(2H)-pyridinones. VI. Introduction of an amidocarbonylmethyl chain at C-4 of the 1,6-dihydro-3(2H)-pyridinone nucleus via photochemical (2+2) cycloaddition reaction.
作者:TAKESHI IMANISHI、MAKOTO INOUE、YASUAKI WADA、MIYOJI HANAOKA
DOI:10.1248/cpb.31.1235
日期:——
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)。