Sodium Hydroxide → HCID 178424829, compound

Participants

Reaction Steps

To a solution of 3-amino-2-carbamoyl-4-[4-(3-methylphenylmethyl) phenyl]pyrazole (2.0 g) in methanol (20 ml) was added 5N sodium hydroxide solution (10 ml), and the mixture was refluxed for 4 hours. Methanol was distilled away under reduced pressure. To the residue was added water (100 ml), and the mixture was neutralized (pH 7 to 8) with conc. hydrochloric acid, and extracted with chloroform. The extract was washed with water and saturated aqueous sodium chloride solution, dried over anhydrous magnesium sulfate, and the solvent was distilled away under reduced pressure. The residue was separated and purified by using a silica-gel column chromatography (ethyl acetate:n-hexane=1:1 followed by chloroform:methanol=10:1) to give a mixture containing the title compound. This mixture Was used in the subsequent reaction without isolation.

Provenance & Evidence