Trifluoroacetic acid → HCID 66755470, compound

Participants

Reaction Steps

A solution of (1-{2-[6-cyano-3-(4-methoxy-benzenesulfonyl)-2-oxo-2,3-dihydro-benzoimidazol-1-yl]-2-phenyl-acetyl}-piperidin-4-yl)-carbamic acid tert-butyl ester (254 mg, 0.39 mmol) in CH2Cl2 (5 mL) was treated with trifluoroacetic acid (5 mL). The reaction mixture was stirred at room temperature for 2 hours, concentrated in vacuo and co-evaporated the solvent with toluene (3×). The residue was dissolved in CH2Cl2 (30 mL) and treated with solid K2CO3. The reaction mixture was stirred at room temperature for 1 hour, filtered and concentrated in vacuo to afford 3-[2-(4-amino-piperidin-1-yl)-2-oxo-1-phenyl-ethyl]-1-(4-methoxy-benzenesulfonyl)-2-oxo-2,3-dihydro-1H-benzoimidazole-5-carbonitrile (179 mg, 83%) as a white solid.

Provenance & Evidence