The photolysis of the isoquinoline N-imides (12a-g) under basic conditions gave the corresponding 5H-2, 3-benzodiazepines (13), presumably via the 1H-2, 3-benzodiazepines (17), together with the parent isoquinolines (14), whereas irradiation of these N-imides (12) under neutral conditions gave no diazepines. Treatment of the 1-methyl-5H-diazepines (13b, f) with acetic anhydride gave the 3-acetyl-3H-2, 3-benzodiazepines (18), which reverted back to the 5H-diazepines (13) on hydrolysis. However, the 1-unsubstituted 5H-diazepines showed no such conversion. Some reactions of the 5H-diazepines (13) thus obtained were also examined.
在碱性条件下对
异喹啉N-亚酰胺(12a-g)进行光解反应,得到了相应的5H-2,3-苯并二氮杂䓬(13),推测是通过1H-2,3-苯并二氮杂䓬(17),同时伴随着母体
异喹啉(14)的生成,而在中性条件下对这些N-亚酰胺(12)进行辐照则未得到二氮杂䓬。用
乙酸酐处理1-甲基-5H-二氮杂䓬(13b, f)得到了3-乙酰基-3H-2,3-苯并二氮杂䓬(18),在
水解后又回复为5H-二氮杂䓬(13)。然而,1位未取代的5H-二氮杂䓬没有发生这种转化。对得到的5H-二氮杂䓬(13)的一些反应也进行了研究。