3-Aminopyridine → 5-[(4-Methyl-1-piperazinyl)sulfonyl]-2-[(phenylmethyl)oxy]-N-3-pyridinylbenzamide

Participants

Reaction Conditions

Reaction Steps

A solution of oxalyl chloride (0.03 ml, 0.31 mmol) in dichloromethane (5 ml) was added dropwise over 1 min to a stirred solution of 5-[(4-methyl-1-piperazinyl)sulfonyl]-2-[(phenylmethyl)oxy]benzoic acid (may be prepared as described in Description 72; 120 mg, 0.31 mmol) in dichloromethane (5 ml) at 0° C. The reaction mixture was stirred at 25° C. for 0.5 h, and then concentrated to give crude acyl chloride. A solution of this acyl chloride in dichloromethane (5 ml) was added dropwise over 5 min to a stirred solution of 3-pyridinamine (28.9 mg, 0.31 mmol) and diisopropylethylamine (0.05 ml, 0.31 mmol) in dichloromethane (20 ml) under nitrogen at 0° C. The reaction mixture was stirred at 25° C. for 1 h. The organic phase was washed with water (25 ml) three times, saturated brine (10 ml) two times, dried over sodium sulfate, and evaporated in vacuo to give crude product as an orange oil. The crude product was crystallized from methanol to yield the title compound as a white solid. 30 mg.

Provenance & Evidence