4-氨基-2-氯-3-硝基吡啶置于水体系中,用 二甲基亚砜 作为反应溶剂,化学反应 4.0H,以69%的收率获得产物2-羟基-3-硝基-4-氨基吡啶
参考文献:New Substituted Imidazo-Pyridinones And Imidazo-Pyridazinones,The Preparation Thereof And Their Use As Pharmaceutical Compositions
标题:New Substituted Imidazo-Pyridinones And Imidazo-Pyridazinones,The Preparation Thereof And Their Use As Pharmaceutical Compositions
摘要:本发明涉及通式所示的取代咪唑吡啶酮和咪唑吡啶酮,其中r1至r4如权利要求书中所定义,它们的互变异构体,立体异构体,混合物及其盐,具有有价值的药理特性,特别是对酶二肽基肽酶-Iv(dpp-Iv)活性的抑制作用.