反应详情

To a solution of ethyl 3-{6-[(2-nitrobenzoyl)amino]-1H-benzimidazol-1-yl}-3-phenylpropanoate (24 mg, 52 μmol) in a mixture of ethanol and water (5:1, 6 mL), was added palladium on carbon (50 mg, 10% w/w Pd) and ammonium formate (17 mg, 270 μmol). The suspension was heated to reflux for 2 hours, cooled to room temperature, filtered through a pad of Celite® and the filtrate was evaporated in vacuo. The residue was taken up in hydrochloric acid (20 mL of a 5N solution) was stirred at room temperature for 72 hours, evaporated in vacuo, and the residue was purified by RP-HPLC to afford the title compounds 3-{6-[(2-aminobenzoyl)amino]-1H-benzimidazol-1-yl}-3-phenylpropanoic acid, [LCMS (Method A, Mobile Phase II) RT=3.65 min, MH+ 401], and 3-{6-[(2-nitrobenzoyl)amino]-1H-benzimidazol-1-yl}-3-phenylpropanoic acid, [LCMS (Method A, Mobile Phase II) RT=3.58 min, MH+ 431].

1. temperatureThe suspension was heated
2. temperatureto reflux for 2 hours
3. filtrationfiltered through a pad of Celite®
4. customthe filtrate was evaporated in vacuo
5. customevaporated in vacuo
6. customthe residue was purified by RP-HPLC