Acetic Anhydride → {1-[1'-Methanesulfonyl-5-(4'-{2-[1-(2-methoxycarbonylamino-3-methyl-butyryl)-pyrrolidin-2-yl]-3H-imidazol-4-yl}-biphenyl-4-yl)-1',2',4',5'-tetrahydro-1H-[2,4']biimidazolyl-3'-carbonyl]-2-methyl-propyl}-carbamic acid methyl ester

Participants

Reaction Conditions

Reaction Steps

{1-[4-(4-Bromo-phenyl)-1′-methane sulfonyl-1′,2′,4′,5′-tetrahydro-1H-[2,4′]biimidazolyl-3′-carbonyl]-2-methyl-propyl}-carbamic acid methyl ester (62.9 mg, 0.119 mmol) [prepared as described for the synthesis of {1-[1′-Acetyl-4-(4-bromo-phenyl)-1′,2′,4′,5′-tetrahydro-1H-[2,4′]biimidazolyl-3′-carbonyl (Example BY)]-2-methyl-propyl}-carbamic acid methyl ester substituting the acetic anhydride with methyl sulfonyl chloride] was combined with [2-Methyl-1-(2-{4-[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 (54.6 mg, 0.110 mmol) under an argon atmosphere. Potassium carbonate (33.1 mg, 0.240 mmol) and Pd(PPh3)4 (12.7 mg, 0.011 mmol) were added, followed by DME (2.0 mL) and water (0.4 mL). The mixture was heated under microwave conditions for 20 minutes at 120° C. All volatiles were removed in vacuo and the crude material was dissolved in DMF and purified via RP-HPLC (eluent: water/MeCN w 0.1% TFA) to yield the product (20.1 mg): LCMS-ESI': calc'd for C40H51N9O8S: 817.9 (M+). Found: 818.6 (M+H+); 1H-NMR: 300 MHz, (MeOH-d4) δ: 7.90-7.81 (m, 10H), 5.69 (d, J=7.5 Hz, 1H), 5.48 (dd, J=6.9, 6.9 Hz, 1H), 5.27 (dd, J=8.1, 8.1 Hz, 1H), 5.17 (d, J=8.4 Hz, 1H), 4.41 (dd, J=12.0, 7.8 Hz, 1H), 4.24 (d, J=7.2 Hz, 1H), 4.11 (m, 2H), 4.00 (d, J=8.1 Hz, 1H), 3.87 (m, 2H), 3.67 (s, 3H), 3.66 (s, 3H), 3.17 (s, 3H), 2.57 (m, 1H), 2.29-1.99 (m, 5H), 1.03-0.89 (m, 12H).

Provenance & Evidence