Dimethyl Sulfate → HCID 13885835, compound

Participants

Reaction Steps

A mixture of 7.1 g (0.025 mole) of 2-[(cyanomethyl)phenylamino]-5-methoxybenzoic acid [P. C. Unangst and M. E. Carethers, J. Heterocyclic Chem., 21, 709 (1974)], 4.0 g (0.029 mole) of anhydrous potassium carbonate, and 3.0 ml (4.0 g; 0.032 mole) of dimethyl sulfate in 200 ml of acetonitrile was stirred at reflux for 24 hours. The mixture was cooled and filtered, and the filter cake was washed several times with fresh acetonitrile. The combined filtrates were evaporated to an oil, which crystallized upon standing at room temperature. Recrystallization from aqueous methanol yielded 5.1 g (68% yield) of the ester product. A sample recrystallized again as above was analytically pure, mp 107°-109° C.

Provenance & Evidence