1,2-Dichloroethane → 7-Methyl-2-propyl-3H-benzoimidazole-5-carboxylic acid ((R)-1-benzyl-2-benzyloxycarbamoylethyl)amide

Participants

Reaction Steps

To a solution of 7-methyl-2-propyl-3H-benzoimidazole-5-carboxylic acid (164 mg, 752 μmol) and (R)-3-amino-N-benzyloxy-4-phenylbutyramide (TFA salt: 300 mg, 754 μmol) in DMF (10 mL) containing triethylamine (210 μL), was added HOBt (151 μg, 755 μmol) and EDC (151 mg, 788 μmol). The mixture was stirred at room temperature overnight and concentrated in vacuo, yielding a pale brown residue. The residue was dissolved in DCM (100 mL) and washed sequentially with 1M H3PO4, a saturated NaHCO3 solution, and saturated aqueous NaCl. The organic layer was collected, dried over MgSO4, and concentrated to afford the title compound as a pale yellow oil (150 mg; 41% yield), which was used without further treatment. ESMS [M+H]+ calcd for C29H32N4O3, 485.26. found 485.5.

Provenance & Evidence