Triethylamine → rac-2-{4-[(4S*,5R*)-2-(2-tert-butyl-4-ethoxy-pyrimidin-5yl)-4,5-bis-(4-chloro-phenyl)-4,5-dimethyl-4,5-dihydro-imidazole-1-carbonyl]-piperazin-1-yl}-acetamide

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rac-(4S*,5R*)-2-(2-tert-Butyl-4-ethoxy-pyrimidin-5-yl)-4,5-bis-(4-chloro-phenyl)-4,5-dimethyl-4,5-dihydro-imidazole-1-carbonyl chloride (110 mg, 0.2 mmol) was added to the mixture of triethylamine (140 uL, 1.0 mmol) and 2-piperazin-1-yl-acetamide dihydrochloride (52 mg, 0.24 mmol, Matrix Scientific) in 3 mL of dichloromethane at 0° C. The mixture was allowed to react for 16 h then concentrated to dryness under reduced pressure. Purification of the crude residue by flash column chromatography (40 g of silica gel, eluting with a gradient of 5 to 100% of 9:1 ethyl acetate-methanol and ethyl acetate) provided 105 mg of rac-2-{4-[(4S*,5R*)-2-(2-tert-butyl-4-ethoxy-pyrimidin-5yl)-4,5-bis-(4-chloro-phenyl)-4,5-dimethyl-4,5-dihydro-imidazole-1-carbonyl]-piperazin-1-yl}-acetamide as white solids.

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