N-acyl α-dehydro(1-naphthyl)alanines (1) having the dialkylamino donor at the end of a side chain in methanol was found to give 1,2-dihydrobenzo[ƒ]quinolinones (2) in good yields, which were formed via the electron-transfer reaction in the excited-state (E)-isomers, while intramolecular photoaddition reactions in the (Z)- and (E)-isomers afforded minor amounts of benzo[ƒ]isoquinoline (3) and 1-azetine
取代的照射Ñ酰基α脱氢(1-
萘基)丙
氨酸(1),其具有在
甲醇中的侧链的末端的二烷基
氨基供体被发现,得到1,2-二氢-苯并[ƒ]
喹啉酮(2以良好的收率) ,是通过在激发态(E)异构体中的电子转移反应形成的,而在(Z)和(E)异构体中的分子内光加成反应提供的苯并[异]
异喹啉(3)和1-氮杂
环丁烷(4)衍
生物。取代基对产物分布的影响分析表明,庞大的
二异丙基氨基供体以及氮-苯甲酰基团发挥作用,使相对产率提高3至2。