ZrCl4-Catalyzed Synthesis of Pyrimido[4,5-b]quinolin-2,4-(1H,3H)- diones and 11H-Indeno[1,2-b]quinolin-11-ones
Guodong Yin, Yuan Li, Ling Fan
Chinese Journal of Organic Chemistry . 2021, (3): 1234 -1240 .  DOI: 10.6023/cjoc202007056