Acetic Anhydride → HCID 59140138, compound

Participants

Reaction Steps

To a solution of 6-aminomethyl-5-fluoro-2-(2-fluoro-4-trimethylsilanyl-phenylamino)-nicotinic acid methyl ester (2.0 g, 5.5 mmol) in formic acid (30 mL) at 0° C. was added acetic anhydride (6 mL). The reaction mixture was stirred at ambient temperature for 2 hours. The reaction mixture was concentrated in vacuo and the resultant residue azeotroped with toluene, then dissolved in dichloromethane. This organic layer was washed with a saturated aqueous solution of sodium bicarbonate, followed by brine, dried (Na2SO4), filtered and concentrated in vacuo to afford the title compound as a dark brown solid (2.1 g, 100%). LCMS (method B): RT=4.36 min, [M+H]+=394.

Provenance & Evidence