Water → HCID 13050866, compound

Participants

Reaction Steps

In pyridine (3 ml) was dissolved methyl 2-(3-methoxy-5-hydroxy-1,4-naphthoquinon-2-yl)-3-methoxy-5-methylbenzoate (20 mg) as obtained in Example 3, followed by addition of acetic anhydride (3 ml). The mixture was allowed to stand at room temperature overnight. After addition of water, the mixture was extracted with ethyl acetate. The solvent layer was washed with dilute HCl, water and dilute aqueous sodium hydrogen carbonate in that order, and dried over magnesium sulfate. The solvent was then distilled off and the residue was crystallized by addition of methanol. The above procedure gave methyl 2-(3-methoxy-5-acetoxy-1,4-naphthoquinon-2-yl)-3-methoxy-5-methylbenzoate (13 mg).

Provenance & Evidence