Hydrochloric Acid → 5-(1'-{[3,5-Diethoxy-4-(1-methyl-1H-pyrazol-4-yl)phenyl]carbonyl}-4-oxospiro[chroman-2,4'-piperidin]-6-yl)pyridine-3-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

Carbonyldiimidazole (130 mg) and triethylamine (0.446 mL) were added to a DMF solution (4 mL) of 3,5-diethoxy-4-(1-methyl-1H-pyrazol-4-yl)benzoic acid (232 mg), and stirred at 70° C. for 2 hours. To the reaction liquid, added was a DMF suspension (2 ml) of 5-(4-oxospiro[chroman-2,4′-piperidin]-6-yl)pyridine-3-carboxylic acid dihydrochloride (370 mg) and triethylamine (0.335 ml) that had been prepared separately, and further stirred at that temperature for 1 hour. 1 N hydrochloric acid and water were added to the reaction liquid, the resulting solid was taken out through filtration, and recrystallized from methanol to obtain the title compound.

Provenance & Evidence