Sodium Bicarbonate → (2-methanesulfonyl-1-{2-[5-(4'-{2-[1-(2-methoxycarbonylamino-3-methyl-butyryl)-pyrrolidin-2-yl]-3H-imidazol-4-yl}-biphenyl-4-yl)-1H-imidazol-2-yl]-pyrrolidine-1-carbonyl}-2-methyl-propyl)-carbamic acid methyl ester

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[2-Methanesulfonyl-2-methyl-1-(2-{5-[4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]-1H-imidazol-2-yl}-pyrrolidine-1-carbonyl)-propyl]-carbamic acid methyl ester (700 mg, 1.22 mmol) and (1-{2-[5-(4-bromo-phenyl)-1H-imidazol-2-yl]-pyrrolidine-1-carbonyl}-2-methyl-propyl)-carbamic acid methyl ester (565 mg, 1.26 mmol) in 3:1 DME/H2O (15 mL) were treated with Pd(PPh3)4 (56 mg, 0.0050 mmol) and NaHCO3 (350 mg, 4.15 mmol). The mixture was stirred in a sealed tube at 80° C. for 24 hours. The mixture was filtered through a fritted glass funnel and concentrated. The mixture was subjected to a reverse phase HPLC column (5-95% MeCN—H2O; 0.1% TFA modifier) to afford (2-methanesulfonyl-1-{2-[5-(4′-{2-[1-(2-methoxycarbonylamino-3-methyl-butyryl)-pyrrolidin-2-yl]-3H-imidazol-4-yl}-biphenyl-4-yl)-1H-imidazol-2-yl]-pyrrolidine-1-carbonyl}-2-methyl-propyl)-carbamic acid methyl ester (150 mg, 15%) as a white solid (TFA salt): 1H NMR (CD3OD, 300 MHz) 7.85 (m, 10H), 5.25 (m, 2H), 4.24 (d, J=7.5 Hz, 1H), 4.13 (m, 2H), 3.88 (app d, J=7.5 Hz, 2H), 3.71 (s, 3H), 3.66 (s, 3H), 2.99 (s, 3H), 2.57 (m, 2H), 2.16 (m, 10H), 1.81 (s, 3H), 1.79 (s, 1H), 0.93 (m, 6H); MS (ESI) m/z 818 [M+H]+.

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