Synthesis of imidazo(4,5-e)(1,4)diazepine and imidazo(4,5-e)(1,4)oxazepine derivatives using caffeidine, a hydrolysis product of caffeine.
作者:TSUTOMU OHSAKI、TAKEO KURIKI、TAISEI UEDA、JINSAKU SAKAKIBARA、MASAHISA ASANO
DOI:10.1248/cpb.34.3573
日期:——
Synthesis of imidazo[4, 5-e][1, 4]diazepines using caffeidine (1) was studied. Caffeidine was condensed with various α, β-unsaturated carboxylic acid derivatives to give N-(α, β-unsaturated acyl)caffeidines (4). Intramolecular Michael addition of 4 having an electron-withdrawing group at the β-position of the α, β-unsaturated acyl group afforded imidazo[4, 5-e][1, 4]diazepines (5, 6). Compounds of the same type (14) were also prepared by treatment of N-(α-halogenoacyl)caffeidines (13) with EtONa in abs. EtOH. On the other hand, heating of 13 in H2O gave imidazo[4, 5-e][1, 4]oxazepines (15). Compounds 5d, 15b, and 15c showed arterial relaxing activities.
研究了使用咖啡啶(1)合成咪唑并[4, 5-e][1, 4]二氮杂卓类化合物。咖啡啶与各种α, β-不饱和羧酸衍生物缩合生成N-(α, β-不饱和酰基)咖啡啶(4)。在α, β-不饱和酰基的β位具有吸电子基团的4发生分子内迈克尔加成反应,得到咪唑并[4, 5-e][1, 4]二氮杂卓(5, 6)。通过N-(α-卤代酰基)咖啡啶(13)在无水乙醇中与EtONa处理,也制备了相同类型的化合物(14)。另一方面,将13在水中加热得到咪唑并[4, 5-e][1, 4]氧氮杂卓(15)。化合物5d、15b和15c显示出动脉松弛活性。