A novel synthetic route to 1,2-dimethyl-5-phenyl-1<i>H</i>-imidazo[4,5-<i>b</i>]pyridin-7-ol
作者:Randall Lis、Joseph A. Traina、John C. Huffman
DOI:10.1002/jhet.5570270311
日期:1990.3
in the formation of 8-ethoxycarbonyl-6,7-dimethyl-4-oxo-2-phenylimidazo[1,5-a]pyrimidin-5-ium, hydroxide, inner salt. This compound was then transformed into 1,2-dimethyl-5-phenyl-1H-imidazo-[4,5-b]pyridin-7-ol via several intermediates. A number of structurally interesting compounds were also isolated during the course of this work. Thus, the target ring system was formed by a circuitous series of
加热4-氨基-1,2-二甲基-1H-咪唑-5-羧酸乙酯与乙酸苯甲酰乙酯的混合物导致形成8-乙氧基羰基-6,7-二甲基-4-氧代-2-苯基咪唑并[1,5 - a ]嘧啶-5-鎓,氢氧化物,内盐。然后通过几种中间体将该化合物转化为1,2-二甲基-5-苯基-1 H-咪唑-[4,5 - b ]吡啶-7-醇。在这项工作过程中,还分离出了许多结构上有趣的化合物。因此,目标环系统是由一系列环链互变异构/重排形成的。