NHPh 2 POCl3 5-A6 o Ph o K洲NPh NH C Ph NH NH O P-ONHPh O O NMe2 POCl3 NMe2 5-A6 NHPh O P O Cl Cl Cl P O Cl Cl Cl O NH Ph P O Cl O NH Ph Cl + Cl NH Cl O Ph P O Cl Cl