Summary
By the action of methyl iodide and potassium carbonate, quercetin underwent complete methylation, while herbacetin and gossypetin yielded 3∶7∶8∶4′-tetramethyl ether and 3∶7∶8∶3′∶4′-pentamethyl ether respectively. This reagent, therefore, resembles diazomethane in the methylation of the naturally occurring flavonols.
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Rao, P.S., Reddy, P.P. & Seshadri, T.R. Methylation of hydroxy flavonols using methyl iodide and potassium carbonate. Proc. Indian Acad. Sci. (Math. Sci.) 12, 495 (1940). https://doi.org/10.1007/BF03170712
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DOI: https://doi.org/10.1007/BF03170712