1,1'-Carbonyldiimidazole → Methyl 6-(2-amino-3-carbamoylphenylcarbamoyl)nicotinate

Participants

Reaction Steps

A solution of 5-(methoxycarbonyl)picolinic acid (3.33 g, 18.4 mmol) in a mixture of pyridine (20 mL) and N,N-dimethylformamide (35 mL) was treated with 1,1′-carbonyldiimidazole (3.28 g, 20.2 mmol) at 45° C. for 2 hours. After cooling, 2,3-diaminobenzamide (HCl salt) (4.12 g, 18.4 mmol) was added and the mixture stirred at room temperature overnight. The mixture was concentrated and the residue used in the next step without further purification.

Provenance & Evidence