反应详情

A mixture of 7-methyl-2-propyl-3-[2′-(1H-tetrazol-5-yl)biphenyl-4-ylmethyl]-3H-benzoimidazole-5-carboxylic acid ((R)-1-benzyl-2-benzyloxycarbamoylethyl)amide and 7-methyl-2-propyl-1-[2′-(1H-tetrazol-5-yl)biphenyl-4-ylmethyl]-1H-benzoimidazole-5-carboxylic acid ((R)-1-benzyl-2-benzyloxycarbamoylethyl)amide were dissolved in EtOH (50 mL), followed by the addition of 10% Pd/C (200 mg). The final mixture was bubbled with nitrogen gas for 5 minutes, and degassed. The reaction mixture was stirred under hydrogen (1 atm) for 12 hours, and filtered through Celite®. The filtrate was concentrated to afford a pale brown oil. The oil was dissolved in 50% aqueous acetic acid, and purified by reversed phase preparative HPLC. The desired product, compound 2-b (minor component), was isolated as a colorless solid.

1. customThe final mixture was bubbled with nitrogen gas for 5 minutes
2. customdegassed
3. filtrationfiltered through Celite®
4. concentrationThe filtrate was concentrated
5. customto afford a pale brown oil
6. custompurified by reversed phase preparative HPLC