Lithium Hexamethyldisilazide → 5-(2-Fluoro-4-iodophenylamino)-imidazo[1,5-a]pyridine-6-carboxylic acid (2-vinyloxyethoxy)-amide

Participants

Reaction Conditions

Reaction Steps

To a solution of 5-(2-fluoro-4-iodophenylamino)imidazo[1,5-a]pyridine-6-carboxylic acid methyl ester (1.5 g, 3.64 mmol) and O-(2-vinyloxyethyl)hydroxylamine (749 mg, 7.28 mmol) in THF (30 mL) at 0° C. was added lithium bis(trimethylsilyl)amide as a solution in THF (18 mL, 1 M, 18 mmol) over 5 minutes. The reaction mixture was stirred at ˜0° C. for 1 hour before being quenched with saturated aqueous ammonium chloride. Volatile solvents were removed in vacuo and then diethyl ether (10 mL) and ethyl acetate (20 mL) added. The resultant mixture was sonicated causing a precipitate to form which was filtered off to give the title compound as a yellow solid (1.07 g, 61%). LCMS (Method B): RT=2.79 min, M+H+=483.

Provenance & Evidence