Alkoxymethylene derivatives I of 2,4-pentanedione, 3-oxobutanenitrile, and methyl and ethyl 3-oxobutanoates with substituted 1-phenyl-5-aminobenzimidazoles and -benzotriazoles II give the products of nucleophilic substitution III and IV which, bearing ester groups, undergo thermal cyclizations to the corresponding 8-acetyl-3-phenyl-6,9-dihydroazolo[4,5-f]quinolin-9(3H)-ones V and VI. IR, UV, 1H and 13C NMR data are given.
2,4-戊二酮,3-氧代丁腈和甲基、乙基3-氧代丁酸的烷氧基亚甲基衍生物I与取代的1-苯基-5-氨基苯并咪唑和苯并三唑II反应,生成亲核取代产物III和IV,这些产物带有酯基,经过热环化反应形成相应的8-乙酰基-3-苯基-6,9-二氢-3H-氮杂[4,5-f]喹啉-9-one V和VI。给出了红外、紫外、1H和13C NMR数据。