Hydrochloric Acid → {2-[2-(5-{4-[6-(2-{1-[2-Methoxycarbonylamino-2-(tetrahydro-pyran-4-yl)-acetyl]-pyrrolidin-2-yl}-3H-imidazol-4-yl)-naphthalen-2-yl]-phenyl}-1H-imidazol-2-yl)-pyrrolidin-1-yl]-2-oxo-1-phenyl-ethyl}-carbamic acid methyl ester

Participants

Reaction Steps

To a solution of 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, 0.26 mmol) in CH2Cl2 (2.5 mL) and MeOH (0.1 mL) was added HCl (in dioxanes, 4 M, 0.7 mL, 2.80 mmol). The solution was stirred at room temperature for 3 h and concentrated to dryness. The resulting solid was slurried in CH2Cl2 (4 mL). Methoxycarbonylamino-(tetrahydro-pyran-4-yl)-acetic acid (0.12 g, 0.54 mmol), HATU (0.12 g, 0.33 mmol), and DIPEA (0.2 mL, 1.15 mmol) were added. The resulting solution was stirred at room temperature for 1 h. The solution was diluted with THF and LiOH (2.5 M, 0.1 mL) was added. The solution was concentrated to dryness and the crude oil was diluted with DMF and purified by preparative HPLC (Gemini, 15→40% MeCN in H2O (0.1% formic acid)) and lyophilized to provide {2-[2-(5-{4-[6-(2-{1-[2-Methoxycarbonylamino-2-(tetrahydro-pyran-4-yl)-acetyl]-pyrrolidin-2-yl}-3H-imidazol-4-yl)-naphthalen-2-yl]-phenyl}-1H-imidazol-2-yl)-pyrrolidin-1-yl]-2-oxo-1-phenyl-ethyl}-carbamic acid methyl ester (0.083 g, 37%). LCMS-ESI+: calc'd for C49H52N8O7: 864.40 (M+); Found: 866.01 (M+H+).

Provenance & Evidence