Three convenient methods of reduction of the nitro group of 5-nitroimidazoles and 5-nitrothiazole that bear a diethylmethylene malonate group in an ortho-like position with respect to the nitro group and cyclization of the resulting amino derivatives are reported. These reactions afforded the target bicyclic 2-pyridones in good to excellent yields.
本报告介绍了还原 5-硝基
咪唑和
5-硝基噻唑的硝基的三种简便方法,这些
咪唑和
噻唑的硝基与
二乙基亚
甲基丙二酸二乙酯基团的位置类似于硝基的正交位置,并将得到的
氨基衍
生物环化。这些反应以良好到极佳的收率获得了目标双环 2-
吡啶酮。