Hydrochloric Acid → HCID 15390589, compound

Participants

Reaction Steps

A methanol (40 mL) solution of 2-(4-chloro-2-fluoro-5-methoxycarbonyloxyphenyl)-5,6-dihydroimidazo [1,5-a] pyridine-1,3[2H, 7H]-dione (3.13 g, 8.8 mmol) and potassium carbonate (1.22 g, 8.8 mmol) was stirred at 50°-60° C. for 8 hours. Diethyl ether (20 mL) and 1N hydrochloric acid (30 mL) were added to the resulting mixture, and the organic layer was separated and then the aqueous layer was extracted with diethyl ether (20 mL×2 times). The organic layer combined was washed with a saturated sodium chloride solution (30 mL) and dried over anhydrous magnesium sulfate. After removal of magnesium sulfate by filtration, the filtrate was evaporated to give crude product, which was purified by silica gel column (Wakogel C-200, ethyl acetate/hexane=1/1) to obtain a white solid of 2-(4-chloro-2-fluoro-5-hydroxyphenyl)-5,6-dihydroimidazo [1,5-a] pyridine-1,3[2H, 7H]-dione (0.93 g, yield:5.8%).

Provenance & Evidence