3,7-Diphenyl-10-(4-chlorophenyl)pyrido<2,3-d:6,5-d'>dipyrimidine-2,4,6,8(1H,3H,7H,10H)-tetraone 在
ammonium hydroxide 、 sodium dithionite 作用下,
反应 1.0h,
以85%的产率得到9-(4-Chloro-phenyl)-3,6-diphenyl-9,10-dihydro-1H,8H-1,3,6,8,9-pentaaza-anthracene-2,4,5,7-tetraone