Am. Elagrody et al., THE REACTION OF COUMARIN DERIVATIVES WITH NUCLEOPHILIC-REAGENTS, Journal of the Chemical Society of Pakistan, 15(4), 1993, pp. 261-263
Coumarin-3N-(4-bromo-2-aroylphenyl) carboxamides (II and III) have bee
n prepared from (I) by Friedel-Crafts reaction. Also, the reaction of
3-cyanocoumarin with Grignard reagents was reported.