Synthesis of 3,3-Arylidene bis(4-hydroxycoumarin) Catalyzed by Sulfamic Acid in Aqueous Media under Microwave Irradiation
ZHOU Jian-Feng, GONG Gui-Xia, AN Li-Chao, SUN Xiao-Jun, SHU Feng-Xia
Chin. J. Org. Chem. . 2009, (12): 1988 -1991 .