[CH3:1][O:2][CH2:3][CH2:4][N:5]1[CH:9]=[C:8]([C:10]2[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=2)[NH:7][C:6]1=[O:16]>[Pd].C(O)C>[CH3:1][O:2][CH2:3][CH2:4][N:5]1[CH2:9][CH:8]([C:10]2[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=2)[NH:7][C:6]1=[O:16]The 1-(2-methoxyethyl)-4-phenyl-4-imidazolin-2-one (6.5 g) so obtained is next admixed with 10% palladium on carbon (0.7 g) in ethanol (50 ml). The mixture is thereafter hydrogenated at 50 psi at room temperature for four hours and the catalyst is filtered. Resultant filtrate is finally concentrated to yield racemic 1-(2-methoxyethyl)-4-phenyl-2-imidazolidone (6.0 g), [α]D20 =-0.2(c=1 in CHCl3).
Wird geladen…