1-(2,5-Xylyl)piperazine → (RS)-4-[4-(2,5-dimethyl-phenyl)-piperazine-1-carbonyl]-1-(3-methoxy-benzenesulfonyl)-3-phenyl-imidazolidin-2-one

Beteiligte Stoffe

Reaktionsschritte

To a solution of (RS)-1-(3-methoxy-benzenesulfonyl)-2-oxo-3-phenyl-imidazolidine-4-carboxylic acid (0.040 g) in tetrahydrofuran (2 ml) were added 1-(2,5-dimethylphenyl)-piperazine (0.030 g), (benzotriazol-1-yloxy)-tris-(dimethylamino)-phosphonium-hexafluorophosphate (BOP reagent, 0.071 g) and N-ethyl-diisopropylamine (0.041 g). The mixture was stirred at room temperature for 4 h. The solvent was evaporated and the product was purified by chromatography (SiO2, cyclohexane/ethyl acetate 4:1=>1:1) to give (RS)-4-[4-(2,5-dimethyl-phenyl)-piperazine-1-carbonyl]-1-(3-methoxy-benzenesulfonyl)-3-phenyl-imidazolidin-2-one (0.065 g) as a colorless solid. MS: 549.0 ([M+H]+)

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