T. Sugaya et al., SYNTHESIS OF A 6H-PYRAZOLO[4,5,1-DE]ACRIDIN-6-ONE DERIVATIVE - A USEFUL INTERMEDIATE OF ANTITUMOR AGENTS, Synthesis, (1), 1994, pp. 73-76
A 6H-pyrazolo[4,5,1-de]acridin-6-one derivative, a useful intermediate
of antitumor agents, was prepared by a facile synthetic route from 2-
bromobenzoic acid and 6-nitroindazole involving a halogenocopper(I)-ca
talyzed Ullmann coupling reaction and Friedel-Crafts cyclization.