Hydrochloric Acid → HCID 59309757, compound

Participants

Reaction Steps

To a mixture of 2-amino-9-[2-chloro-5-(2,3-difluoro-6-methoxybenzyloxy)-4-methoxyphenyl]-6-methoxy-7,9-dihydro-8H-purin-8-one (40 mg) and N,N-diisopropyl-ethylamine (0.15 mL) in ethyl acetate (4 mL) was added acetoxyacetyl chloride (0.078 mL), and the mixture was stirred at room temperature overnight. To the reaction mixture was added 1 mol/L hydrochloric acid, and the resulting mixture was extracted with ethyl acetate. The extract was washed with water and brine, and dried over anhydrous sodium sulfate. The solvent was removed under reduced pressure, and the residue was dissolved in methanol (1 mL)-tetrahydrofuran (2 mL). To the solution was added sodium methoxide (28% methanol solution, 0.05 mL), and the mixture was stirred at room temperature for 1 hour. To the reaction mixture was added 1 mol/L hydrochloric acid, and the mixture was poured into a saturated aqueous ammonium chloride solution, and the resulting mixture was extracted with ethyl acetate. The extract was washed with water and brine, and dried over anhydrous sodium sulfate. The solvent was removed under reduced pressure, and the residue was purified by column chromatography on silica gel (eluent: n-hexane/ethyl acetate=1/1−ethyl acetate) to give the title compound (4 mg).

Provenance & Evidence