An efficient one-pot four-component synthesis of 5H-spiro[benzo[7,8]chromeno[2,3-c]pyrazole-7,3′-indoline]-2′,5,6(9H)-trione derivatives catalyzed by MgCl2

Physical Sciences and Engineering Chemistry Organic Chemistry

Tianhua Shen, Zhijie Fu, Fengfeng Che, Haibo Dang, Yan Lin, Qingbao Song,