Acetic Acid → 5-chloro-thiophene-2-carboxylic acid {(1S,4R)-4-[2-fluoro-4-(2-oxo-2H-pyridin-1-yl)-phenylcarbamoyl]-2-pyrrolidin-1-yl-cyclopentyl}-amide

Participants

Reaction Steps

To a stirred solution of 5-chloro-thiophene-2-carboxylic acid {(1S,4R)-4-[2-fluoro-4-(2-oxo-2H-pyridin-1-yl)-phenylcarbamoyl]-2-oxo-cyclopentyl}-amide (75 mg) in THF (3 ml) were added pyrrolidine (0.03 ml) and acetic acid (0.02 ml). After stirring for 1 hr at r.t., NaBH3CN (11 mg) was added and stirring of the yellow reaction mixture was continued over night, then concentrated. The crude product was purified by column chromatography (silica gel; gradient: CH2Cl2→CH2Cl2MeOH 85:15) to give 5-chloro-thiophene-2-carboxylic acid {(1S,4R)-4-[2-fluoro-4-(2-oxo-2H-pyridin-1-yl)-phenylcarbamoyl]-2-pyrrolidin-1-yl-cyclopentyl}-amide (40 mg) as crystalline solid. MS 529.3 ([M+H]+).

Provenance & Evidence