(2,4-Dimethoxy-phenyl)-acetyl chloride → 2-(2,4-dimethoxy-phenyl)-N-{4-[2-(2-methyl-5-oxo-4,4-diphenyl-4,5-dihydro-imidazol-1-yl)-acetyl]-phenyl}-acetamide

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Reaction Steps

Synthesis in analogy to Example 8 starting from 3-[2-(4-amino-phenyl)-2-oxo-ethyl]-2-methyl-5,5-diphenyl-3,5-dihydro-imidazol-4-one and (2,4-dimethoxy-phenyl)-acetyl chloride to yield 2-(2,4-dimethoxy-phenyl)-N-{4-[2-(2-methyl-5-oxo-4,4-diphenyl-4,5-dihydro-imidazol-1-yl)-acetyl]-phenyl}-acetamide (55 mg, 0.098 mmol) which is dissolved 5 mL dry ethanol. Subsequently LiBH4 (22.5 mg, 0.98 mmol) is added and the reaction mixture is stirred for 4 hour at reflux temperature. The reaction is then diluted with 5 mL water and the solvents evaporated. The residue is purified by preparative HPLC (method 3) to yield 2-(2,4-dimethoxy-phenyl)-N-{4-[1-hydroxy-2-(2-methyl-5-oxo-4,4-diphenyl-4,5-dihydro-imidazol-1-yl)-ethyl]-phenyl}-acetamide (15 mg, 27%). LC/MS at 254 nm; [M+H] 565; Rt=3.006 min.

Provenance & Evidence