Water → HCID 70154558, compound

Participants

Reaction Steps

To a suspension of ethyl 2,4-dioxo-1-[4-(4-diphenylmethoxypiperidino)butyl]-6-hydroxy-1,2,3,4-tetrahydroquinazoline-3-valerate (1.34 g, 2.13 mmol) obtained in Example 105 and potassium carbonate (354 mg, 2.56 mmol) in N,N-dimethylformamide (50.0 ml), benzyl bromide (305 ml, 2.56 mmol) was added dropwise and the reaction mixture was stirred at room temperature for 18.5 hours. The reaction mixture was combined with water and extracted with ethyl acetate. After the extract was washed with water and dried (MgSO4) the solvent was distilled off under reduced pressure. The residue was subjected to a column chromatography on a silica gel eluting with n-hexane-ethyl acetate (5:1, v/v) to give the ethyl ester of the title compound (450 mg, 29%) as an oil.

Provenance & Evidence