Sodium Hydroxide → HCID 18472313, compound

Participants

Reaction Steps

To a solution of ethyl 6—(4-methylphenyl)-2-methyl-2H-1-benzopyran-3-carboxylate (3.0 g) in ethanol-tetrahydrofuran (30-30 ml) was added 1N sodium hydroxide (12 ml) at room temperature, and the mixture was stirred for 16 hours. Under reduced pressure, the solvent was evaporated and acidified with 1N hydrochloric acid. The mixture was extracted with ethyl acetate. The organic layer was washed with saturated sodium chloride solution and dried with magnesium sulfate. Under reduced pressure, the solvent was evaporated to give 6—(4-methylphenyl)-2-methyl-2H-1-benzopyran-3-carboxylic acid (2.15 g) as yellow crystals.

Provenance & Evidence