3-Aminopyridine → 5-(4-Morpholinylsulfonyl)-2-[(phenylmethyl)oxy]-N-3-pyridinylbenzamide

Participants

Reaction Conditions

Reaction Steps

A solution of oxalyl chloride (0.06 ml, 0.66 mmol) in dichloromethane (5 ml) was added dropwise over 1 min to a stirred solution of 5-(4-morpholinylsulfonyl)-2-[(phenylmethyl)oxy]benzoic acid (may be prepared as described in Description 66; 250 mg, 0.66 mmol) in dichloromethane (5 ml) at 0° C. The reaction mixture was stirred at 25° C. for 0.5 h. The organic phase was evaporated in vacuo to give the crude acyl chloride as a yellow solid. A solution of this crude acyl chloride in dichloromethane (5 ml) was added dropwise over 5 min to a stirred solution of 3-pyridinamine (62.3 mg, 0.66 mmol) and diisopropylethylamine (0.12 ml, 0.66 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 and saturated brine (10 ml) two times, dried over sodium sulfate, and evaporated in vacuo to give the crude product as a orange oil.

Provenance & Evidence