Bromination of 7- O-Substituted-8-methyl-coumarins and 4 H-Chromen-4-ones with N-Bromosuccinimide in CCl 4
CHENG Ming, QIU Ya, LIU Hong-Shan, XIA Peng, CHEN Ying
Chin. J. Org. Chem. . 2010, (11): 1737 -1741 .