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Communication | Regular issue | Vol 22, No. 9, 1984, pp.1943-1946
Published online, 1st January, 1970
DOI: 10.3987/R-1984-09-1943
A Novel Synthesis of 6-Methoxy and 7-Methoxy Flavonols

Takkellapati Sudhakar Rao, Shubhada Deshpande, Hari Har Mathur, and Girish Kumar Trivedi*

*Department of Chemistry, Indian Institute of Technology, Powai, Bombay 400 076, India


Condensation of 4-methoxy- (1) or 5-methoxy- (2) salicylaldehyde with ω-nitrostyrene (3-6) in the presence of triethylamine yields 7-methoxy or 6-methoxy-3-nitro-2H-flavene (7-13), which on treatment with alkaline hydrogen peroxide yields the corresponding flavonol (7a-13a) .