Hydrochloric Acid → 1-Adamantan-2-yl-4-benzyl-5-isopropyl-1,3-dihydro-imidazol-2-one

Participants

Reaction Steps

Adamantan-2-yl-3-(1-benzyl-3-methyl-2-oxo-butyl)-urea (100 mg) was dissolved in dry THF (2 mL) and treated with 25% HCl (5 mL) at 60° C. for 3.5 hours. The mixture was cooled, poured into ice cold 3M NaOH, saturated with NaCl. The mixture was extracted with ethyl acetate and the organic layer was separated, washed with brine, dried over Na2SO4 and evaporated. The residue was purified by flash chromatography using a gradient of 10 to 40% ethyl acetate in heptane as an eluent. Fractions containing the desired material were combined and evaporated to give 1-adamantan-2-yl-4-benzyl-5-isopropyl-1,3-dihydro-imidazol-2-one as a white foam (18 mg). MS (EI): 350.3 (M+).

Provenance & Evidence