Ph C6H4OCH3-p PCI O、/CH4OCH3 Et2O,-10℃ OH Ph H mp147℃ mp171℃ UV light Ph Ph C6H4OCH3 PCls Et2O,-10℃ N H′C6H4OCH3p HO mp117℃ mp156℃Et 2O, C Ph C6H4OCH3 N OH PCl 5 -10℃ -p mp147℃ C C6H4OCH3 Ph N H O mp171℃ C Ph C6H4OCH3 N HO UV light mp117℃ -p -10℃ C C6H4OCH3 Ph N H O PCl 5 Et 2O, mp156℃