Heterocycles. X. Synthesis and reactions of 1,4,5-benzotriazocinium salts.
作者:HIDEAKI NATSUGARI、KANJI MEGURO、YUTAKA KUWADA
DOI:10.1248/cpb.27.2084
日期:——
Ring closure reactions of 2-chloroacetamidobenzophenone (N, N-disubstituted)-hydrazones (5) afforded 1, 4, 5-benzotriazocines (6), 1, 4-benzodiazepines (9) and 1, 4, 5-benzotriazocinium salts (8). On treatment with sodium methoxide, 5 and 8 gave 3-(N, N-disubstituted) amino-1, 4-benzodiazepin-2-ones (11) in good yields through Stevens-type rearrangement.
2-氯乙酰氨基苯甲酮(N,N-二取代)肼缩合物(5)的环合反应产生了1,4,5-苯并三氮唑啉(6)、1,4-苯并二氮杂烯(9)和1,4,5-苯并三氮唑铵盐(8)。在与甲氧化钠反应后,5和8通过Stevens类型重排反应以良好的产率生成了3-(N,N-二取代)氨基-1,4-苯并二氮杂烯-2-酮(11)。