申请人:University of Alabama
公开号:US04006160A1
公开(公告)日:1977-02-01
A process is described for the preparation of N-hydroxypyrrole-2-carbonitriles, N-hydroxyimidazole-2-carbonitriles, pyrrole-2-carbonitriles, and 3-substituted-2, 3-dihydro-2-pyrrolones by thermally decomposing 2-azidoheteroaromatic N-oxides. In the process a 2-azidoheteroaromatic N-oxide is heated in a suitable solvent for a period of time sufficient to bring the reaction to completion. Removal of the solvent by conventional methods gives the desired product. Which product is obtained is determined by the choice of solvents. In non-polar aprotic solvents, N-hydroxypyrrole-2-carbonitriles or N-hydroxyimidazole-2-carbonitriles are obtained. In nucleophilic solvents capable of undergoing Michael-type additions pyrrole-2-carbonitriles, imidazole-2-carbonitriles, and 3-substituted-2,3-dihydro-2-pyrrolone derivatives are obtained where a solvent molecule comprises the 3-substituent. These compounds are useful as anti-bacterials, e.g., against E. Coli.
本文描述了一种通过热分解2-偶氮杂芳基N-氧化物制备N-羟基吡咯-2-羧腈、N-羟基咪唑-2-羧腈、吡咯-2-羧腈和3-取代-2,3-二氢-2-吡咯酮的过程。在该过程中,将2-偶氮杂芳基N-氧化物在适当的溶剂中加热一段时间以使反应完成。通过常规方法除去溶剂即可得到所需的产物。所得产物的种类取决于所选溶剂。在非极性无水溶剂中,得到N-羟基吡咯-2-羧腈或N-羟基咪唑-2-羧腈。在能够发生迈克尔型加成的亲核溶剂中,得到吡咯-2-羧腈、咪唑-2-羧腈和3-取代-2,3-二氢-2-吡咯酮衍生物,其中溶剂分子包括3-取代基。这些化合物可用作抗菌剂,例如对抗大肠杆菌。