[O:1]=[C:2]([N:5]1[C@H:9]([CH2:10][C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=2)[CH2:8][O:7][C:6]1=[O:17])[CH2:3][CH3:4].[CH3:18][C@@H:19]([CH2:22][O:23][Si:24]([C:27]([CH3:30])([CH3:29])[CH3:28])([CH3:26])[CH3:25])[CH:20]=[O:21]>>[O:1]=[C:2]([N:5]1[C@H:9]([CH2:10][C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=2)[CH2:8][O:7][C:6]1=[O:17])[C@H:3]([CH3:4])[C@H:20]([OH:21])[C@@H:19]([CH3:18])[CH2:22][O:23][Si:24]([C:27]([CH3:29])([CH3:28])[CH3:30])([CH3:25])[CH3:26]This material is prepared from (R)-3-(1-oxopropyl)-4-(phenylmethyl)-2-oxazolidinone and 2-(S)-methyl-3-t-butyldimethylsiloxypropanal following the method of Evans and Gage, as described in Org. Syn., Vol. 68, 19xx, p. 83.
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