1-benzyl 5-tert-butyl (5S)-3-benzyl-2-oxoimidazolidine-1,5-dicarboxylate → tert-butyl (S)-1-benzyl-2-oxoimidazolidine-4-carboxylate
Reaction equation
[CH2:1]([N:8]1[CH2:12][C@@H:11]([C:13]([O:15][C:16]([CH3:19])([CH3:18])[CH3:17])=[O:14])[N:10](C(OCC2C=CC=CC=2)=O)[C:9]1=[O:30])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1>[Pd].CO>[CH2:1]([N:8]1[CH2:12][C@@H:11]([C:13]([O:15][C:16]([CH3:18])([CH3:17])[CH3:19])=[O:14])[NH:10][C:9]1=[O:30])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1Participants
4
Procedure
7.4 g of tert.-butyl (4S)-1-benzyl-3-benzyloxycarbonyl-2-oxo-imidazolidine-4-carboxylate, 0.1 g of palladium-black and 200 ml of methanol are treated in the same manner as described in Example 1-(3). 4.7 g of tert.-butyl(4S)-1-benzyl-2-oxo-imidazolidine-4-carboxylate are obtained as colorless crystals. Yield: 94.3%