申请人:Sumitomo Chemical Company, Limited
公开号:US04105673A1
公开(公告)日:1978-08-08
An improved process for producing a large ring lactone which comprises subjecting a hydroxy acid to intramolecular condensation by the use of a 1-substituted-2-halopyridinium salt or a 1-substituted-2-haloquinolinium salt as a condensing agent in the presence of an acid captor in an anhydrous organic solvent. According to this process, a variety of lactones, even complex lactones such as macrolides can be obtained in good yields.
一种改进的生产大环内酯的方法,包括将羟基酸通过在无水有机溶剂中使用1-取代-2-卤吡啶盐或1-取代-2-卤喹啉盐作为缩合剂,在酸捕获剂的存在下进行分子内缩合。根据这种方法,可以以较高的产率获得各种内酯,甚至是复杂的内酯,如大环内酯。