To a 100 mL round bottom flask was added 1-(3-Chloro-3′-methanesulfonyl-biphenyl-4-yl)-2-(2,6-dichloro-phenyl)-1H-imidazole-4-carboxylic acid (1.01 g, 1.93 mmol) and anhydrous CHCl3 (17 mL). The reaction solution was cooled to 0° C. prior to addition of oxalyl chloride (0.90 mL, 9.70 mmol) and 1 drop of anhydrous DMF. The reaction solution was allowed to stir warming to r.t. over 1.5 h. The solution was concentrated in vacuo and the residue was dissolved anhydrous toluene (19 mL). To the reaction flask was added acetamide oxime (286 mg, 3.86 mmol) and pyridine (470 μL, 5.79 mmol). The reaction solution was allowed to reflux under N2 for 16 hrs. The reaction solution was diluted with EtOAc (100 mL) and washed with sat aq. NH4Cl (150 mL×2). The organic phase was dried over Na2SO4, filtered, concentrated in vacuo, and chromatographed through a 25 g SiO2 column using a 100% Hexane to 80% EtOAc gradient to yield 202 mg (18% yield) of title compound. MS (ESI) 559.0, 561.0, 563.2 [M+H]+; 1H NMR (400 MHz, DMSO-d6) δ 8.80 (s, 1H), 8.24 (t, J=2 Hz, 1H), 8.19 (d, J=2 Hz, 1H), 8.11 (d, J=8 Hz, 1H), 7.96 (d, J=8 Hz, 1H), 7.85 (dd, J=2 Hz, J2=8 Hz), 7.76 (t, J=8 Hz, 1H), 7.51-7.64 (m, 3H), 7.46 (d, J=8 Hz, 1H), 3.31 (s, 3H), 2.43 (s, 3H).
