Potassium Carbonate → 2-{5-[6-(4-{2-[1-(2-Methoxycarbonylamino-2-phenyl-acetyl)-pyrrolidin-2-yl]-3H-imidazol-4-yl}-phenyl)-naphthalen-2-yl]-1H-imidazol-2-yl}-pyrrolidine-1-carboxylic acid tert-butyl ester

Participants

Reaction Steps

To a solution of 2-(5-{6-[4-(2-{1-[2-Methoxycarbonylamino-2-(tetrahydro-pyran-4-yl)-acetyl]-pyrrolidin-2-yl}-3H-imidazol-4-yl)-phenyl]-naphthalen-2-yl}-1H-imidazol-2-yl)-pyrrolidine-1-carboxylic acid tert-butyl ester (0.25 g, 0.36 mmol) in EtOH (3.5 mL) was added Palladium on carbon (10%, 0.42 g, 0.39 mmol) and Potassium Carbonate (0.10 g, 0.70 mmol). The slurry was stirred at room temperature under an atmosphere of H2 for 72 h. The slurry was filtered through celite and washed with EtOH. The filtrate was concentrated to an oil and diluted with CH2Cl2 (3 mL). Methoxycarbonylamino-phenyl-acetic acid (0.11 g, 0.54 mmol) and Potassium Phosphate (0.08 g, 0.35 mmol) were added and the resulting slurry was cooled to 0° C. (external, ice). COMU (0.19 g, 0.44 mmol) was added and the reaction was stirred at 0° C. for 2 h. The slurry was diluted with CH2Cl2 and filtered through celite. The filtrate was concentrated and purified by column chromatography (SiO2, 30→100% EtOAc (10% MeOH) in Hexanes to 60% MeOH in EtOAc) to provide 2-{5-[6-(4-{2-[1-(2-Methoxycarbonylamino-2-phenyl-acetyl)-pyrrolidin-2-yl]-3H-imidazol-4-yl}-phenyl)-naphthalen-2-yl]-1H-imidazol-2-yl}-pyrrolidine-1-carboxylic acid tert-butyl ester (0.20 g, 74%). LCMS-ESI+: calc'd for C45H47N7O5: 765.36 (M+); Found: 766.64 (M+H+).

Provenance & Evidence