Triphosgene → 1-methyl-1H,2H,3H-imidazo(4,5-c)pyridin-2-one

Participants

Reaction Steps

To a stirred suspension of 3-amino-4-methylaminopyridine [U.S. Pat. No. 5,371,086 (1993)] (190 mg, 1.54 mmol) in CH3CN (10 mL) was added triphosgene (458 mg, 1.54 mmol) portionwise. After 1 h, the mixture was concentrated in vacuo and the residue was converted to the free base by ion exchange chromatography on a SCX cartridge, eluting with 2 M NH3 in MeOH to give the title compound. MS: m/z=150 (M+1).

Provenance & Evidence