Methyl Carbamate → {1-[2-(5-{6-[4-(2-{1-[2-Methoxycarbonylamino-2-(2-methoxy-phenyl)-acetyl]-pyrrolidin-2-yl}-3H-imidazol-4-yl)-phenyl]-naphthalen-2-yl}-1H-imidazol-2-yl)-pyrrolidine-1-carbonyl]-2-methyl-propyl}-carbamic acid methyl ester

Participants

Reaction Conditions

Reaction Steps

{1-[2-(5-{6-[4-(2-{1-P-Methoxycarbonylamino-2-(2-methoxy-phenyl)-acetyl]-pyrrolidin-2-yl}-3H-imidazol-4-yl)-phenyl]-naphthalen-2-yl}-1H-imidazol-2-yl)-pyrrolidine-1-carbonyl]-2-methyl-propyl}-carbamic acid methyl ester. To a solution of {2-Methyl-1-[2-(5-{6-[4-(2-pyrrolidin-2-yl-3H-imidazol-4-yl)-phenyl]-naphthalen-2-yl}-1H-imidazol-2-yl)-pyrrolidine-1-carbonyl]-propyl}-carbamic acid methyl ester (0.04 g, 0.05 mmol) and (S)-Methoxycarbonylamino-(2-methoxy-phenyl)-acetic acid (0.02 g, 0.08 mmol, 1.5 equiv.) in CH2Cl2 (0.5 mL) was added K3PO4 (0.03 g, 0.15 mmol, 3 equiv.). The slurry was cooled to 0° C. and COMU (0.03 g, 0.06 mmol, 1.25 equiv.) and the reaction was stirred at 0° C. for 1 hour. The slurry was diluted with CH2Cl2 and filtered. The filtrate was concentrated and the crude product was purified by preparative HPLC (Gemini, 15→40% MeCN in H2O (0.1% formic acid)) and lyophilized to provide {1-[2-(5-{6-[4-(2-{1-[2-Methoxycarbonylamino-2-(2-methoxy-phenyl)-acetyl]-pyrrolidin-2-yl}-3H-imidazol-4-yl)-phenyl]-naphthalen-2-yl}-1H-imidazol-2-yl)-pyrrolidine-1-carbonyl]-2-methyl-propyl}-carbamic acid methyl ester (0.02 g, 50%) as a white powder. LCMS-ESI+: calc'd for C48H52N8O7: 852.4 (M+). Found: 853.6 (M+H+). 1H-NMR: 400 MHz, (acetone-d6) δ: (Mixture of rotomers) 10.96-11.01 (m, 2H), 8.29 (s, 1H), 8.07 (s, 1H), 7.73-7.89 (m, 7H), 7.35-7.48 (m, 4H), 7.33 (t, 1H), 7.05 (d, 1H), 6.96 (t, 1H), 6.36 (d, 1H), 5.91 (d, 1H), 5.21-5.26 (m, 3H), 4.29 (t, 1H), 3.90 (s, 3H), 3.78-3.93 (m, 2H), 3.60 (s, 3H), 3.58 (s, 3H), 3.30 (q, 2H), 2.59-2.65 (m, 2H), 2.36 (m, 1H), 1.90-2.21 (m, 6H), 0.85-0.93 (m, 6H).

Provenance & Evidence