O-benzyl-L-serine → N-[(S,S)-2,4-dibenzyl-4-carboxybutyryl]-O-benzyl-(L)-serine

反応式

[CH2:1]([C@@H:8]1[CH2:14][C@@H:13]([CH2:15][C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=2)[C:12](=[O:22])[O:11][C:9]1=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH2:23]([O:30][CH2:31][C@@H:32]([C:34]([OH:36])=[O:35])[NH2:33])[C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1>C(Cl)Cl.CCOCC>[CH2:15]([C@H:13]([CH2:14][C@@H:8]([CH2:1][C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1)[C:9]([OH:11])=[O:10])[C:12]([NH:33][C@H:32]([C:34]([OH:36])=[O:35])[CH2:31][O:30][CH2:23][C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1)=[O:22])[C:16]1[CH:17]=[CH:18][CH:19]=[CH:20][CH:21]=1

参加物

実験手順

A solution of 0.5 g of (S,S)-2,4-dibenzylglutaric anhydride and 0.82 g of O-benzyl-(L)-serine 1,2:5,6-di-O-isopropylidene-D-glucofuranos-3-yl ester in 10 ml of methylene chloride is stirred at room temperature overnight. The solution is diluted with ether, washed with 1N hydrochloric acid, water, dried (Na2SO4), filtered and concentrated to give N-[(S,S)-2,4-dibenzyl-4-carboxybutyryl]-O-benzyl-(L)-serine 1,2:5,6-di-O-isopropylidene-D-glucofuranos-3-yl ester melting at 55°-58°; [ ]D =+2.2°.