HCID 22456838, compound → HCID 22456853, compound

Participants

Reaction Steps

A solution of (±)-1-[2-(3,4-dimethoxyphenyl)-2-ethoxyethyl]-1,3-dihydro-3-(phenylmethyl)-2H-imidazol-2-one (4.86 g) in THF (100 ml) was stirred at RT. Phenyllithium (1.278 g) was added dropwise and the mixture was stirred overnight at RT. The mixture was carefully poured out into ice/water (200 ml), then extracted three times with CH2Cl2 (150 ml). The separated organic layer was dried (MgSO4), filtered, and the solvent was evaporated The residue was purified by short column chromatography over silica gel (eluent: CH2Cl2 /(CH3OH/NH3) 95/5). The desired fractions were collected and the solvent was evaporated. The residue was crystallized from ethylacetate. The precipitate was filtered off, wased with ethylacetate and DIPE, then dried, yielding 0.1 g (3%) of (±)-1-[2(3,4-dimethoxyphenyl)-2-ethoxyethyl]-1,3-dihydro-2H-imidazol-2-one (comp. 15; mp. 133.6° C.).

Provenance & Evidence