A convenient synthesis of pyridazino(4,5-b)quinolines and pyrrolo(3,4-b)quinolines.
作者:YOSHIHISA KURASAWA、ATSUSHI TAKADA
DOI:10.1248/cpb.28.3457
日期:——
The reaction of N-(1, 2-bisethoxycarbonylvinyl)-o-aminoacetophenone (IVc) with an excess of hydrazines or guanidines gave 4-hydroxy-1-oxo-1, 2-dihydropyridazino [4, 5-b]-quinolines (Ia, b) or 1, 3-dioxo-1, 3-dihydropyrrolo [3, 4-b] quinolines (IIIc, d), respectively. It was found that 2, 3-bishydrazinocarbonyl-4-methylquinolines (VIa, b) were converted to 4-hydroxy-1-oxo-1, 2-dihydropyridazino [4, 5-b] quinolines (Ia, b) and 1, 3-dioxo-1, 3-dihydropyrrolo [3, 4-b] quinolines (IIIa, b) under different reaction conditions.
N-(1, 2-二乙氧基羰基乙烯基)-邻氨基苯乙酮 (IVc) 与过量的肼或胍反应,得到 4-羟基-1-氧代-1, 2-二氢哒嗪基[4, 5-b]-喹啉(分别为Ia、b)或1, 3-二氧代-1, 3-二氢吡咯并[3, 4-b]喹啉(IIIc, d)。发现2, 3-双肼基羰基-4-甲基喹啉(VIa, b)转化为4-羟基-1-氧代-1, 2-二氢哒嗪基[4, 5-b]喹啉(Ia, b)和1,不同反应条件下的3-二氧代-1, 3-二氢吡咯并[3, 4-b]喹啉(IIIa, b)。