A novel one-pot method was developed for the synthesis of the title compounds starting from 4-chloro-1-aryl-1-butanones 1, phosphorus trichloride and acetic acid. The end products 2 were obtained in 20–94% yield. The cyclization step under acidic conditions probably occurs as a result of anchimeric assistance of the phosphonic acid group.
开发了一种新颖的一锅法合成方法,从4-氯-1-芳基-1-丁酮1、三氯化磷和乙酸出发合成目标化合物。最终产物2的收率为20-94%。在酸性条件下进行的环化步骤可能是由于磷酸基的锚辅助作用而发生的。