Ammonium Acetate → HCID 178502205, 화합물

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(1-{3-Acetyl-5-[2-(4-bromo-phenyl)-2-oxo-ethylcarbamoyl]-imidazolidine-1-carbonyl}-2-methyl-propyl)-carbamic acid methyl ester (203 mg, 0.397 mmol) was dissolved in m-xylenes (4 mL) and heated at 135° C. Solid ammonium acetate (200 mg, 2.58 mmol) was added and the reaction was stirred at 135° C. After 120 minutes, the reaction was cooled to room temperature and the volatiles were removed in vacuo. The crude material was purified via silica gel chromatography (eluent: EtOAc w 10% MeOH/hexanes) to yield the product {1-[1′-Acetyl-4-(4-bromo-phenyl)-1′,2′,4′,5′-tetrahydro-1H-[2,4′]biimidazolyl-3′-carbonyl]-2-methyl-propyl}-carbamic acid methyl ester (162 mg, 0.329 mmol): LCMS-ESI+: calc'd for C21H26BrN5O4: 492.4 (M+). Found: 492.3/494.3 (M+H+).

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