Sodium hydride → HCID 10196736, compound

Participants

Reaction Steps

To a solution of the quinazolinedione of Step G (245 mg, 0.825 mmol) in dimethylformamide (5 mL) was added sodium hydride (60% oil dispersion, 36 mg, 0.90 mmol) and the reaction was allowed to stir at room temperature. In a separate reaction flask containing a solution of the pyrazole acid of Step D (500 mg, 1.65 mmol) in dichloromethane (10 mL) was added oxalyl chloride (0.17 mL, 1.95 mmol) and one drop of DMF. This mixture was stirred for 2 hours, then concentrated and placed under vacuum. The acid chloride was divided into two equal portions. One of these portions was taken up in 5 mL of DMF and added to the quinazolinedione/NaH reaction mixture and the resulting mixture was stirred at room temperature for 3 hours. The reaction was partitioned between ethyl acetate and water, washed twice with water, then with brine and dried over sodium sulfate. The crude product was purified by chromatography on silica gel with 99:1 chloroform/acetone as eluent to afford the title compound, a compound of the present invention.

Provenance & Evidence