Water → HCID 178524292, compound

Participants

Reaction Conditions

Reaction Steps

A solution of 7-chloro-3-(carboxy)pyrazolo[3,4-c][1]benzazepine-4,10(1H,9H)-dione (500 mg, 1.72 mmol) (compound of Example 9) and 1,1′-carbonyldiimidazole (418 mg, 2.58 mmol) in N,N-dimethylformamide (7 mL) was stirred for 16.75 hours. In one portion, phenol (486 mg, 5.16 mmol) was added and the solution was stirred for 24 hours at 70° C. To the resulting solution was added water (30 mL), giving a precipitate which was separated by filtration. This crude product was purified by chromatography eluting with chloroform: 2-propanol (98:2-90:10) to give the title compound (330 mg, 53% yield, m.p. 265° C.).

Provenance & Evidence