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。