Reformatsky reactions with N-arylpyrrolidine-2-thiones: synthesis of tricyclic analogues of quinolone antibacterial agents
作者:Joseph P Michael、Charles B de Koning、Gladys D Hosken、Trevor V Stanbury
DOI:10.1016/s0040-4020(01)00964-4
日期:2001.11
Abstract A convenient synthesis of 5-oxo-1,2,3,5-tetrahydropyrrolo[1,2- a ]quinoline-4-carboxylic acids, tricyclic analogues of the quinolone antibiotics, is described. Key steps in the route are a novel zinc-mediated Reformatsky reaction between diethyl bromomalonate and N -arylpyrrolidine-2-thiones 18 , and cyclisation of the resulting diethyl pyrrolidinylidenemalonate intermediates 19 in polyphosphoric
摘要 描述了一种方便合成 5-oxo-1,2,3,5-四氢吡咯并[1,2-a]喹啉-4-羧酸的方法,它是喹诺酮类抗生素的三环类似物。该路线的关键步骤是溴丙二酸二乙酯和 N-芳基吡咯烷-2-硫酮 18 之间的新型锌介导的 Reformatsky 反应,以及所得吡咯烷基亚丙二酸二乙酯中间体 19 在多磷酸中的环化。这些产品被证明没有生物活性。