2-(o-carboxyphenylamino)-5-(4-chlorophenyl)-9-(4-chlorophenylmethylene)-6,7,8,9-tetrahydropyrimido[4,5-b]quinolin-4-one 在
硫酸 、
溶剂黄146 作用下,
反应 8.0h,
以76%的产率得到12-(4-chlorophenyl)-8-(4-chlorophenylmethylene)-8,9,10,11-tetrahydroquino[2',3':4,5]pyrimido[2,1-b]quinazolin-13(H),14(H)-dione