(2S,3S)-4-benzyloxy-2,3-epoxy-1-butanol tert-butyldimethylsilyl ether → (2R,3R)-4-benzyloxy-1-tert-butyldimethylsilyloxy-3-(3-tolylmethyl)-2-butanol
Reaktionsgleichung
[Si:1]([O:8][CH2:9][C@@H:10]1[O:21][C@H:11]1[CH2:12][O:13][CH2:14][C:15]1[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].[C:22]1([CH3:31])[CH:27]=[CH:26][CH:25]=[C:24]([CH2:28][Mg]Br)[CH:23]=1>>[CH2:14]([O:13][CH2:12][C@@H:11]([CH2:31][C:22]1[CH:23]=[C:24]([CH3:28])[CH:25]=[CH:26][CH:27]=1)[C@@H:10]([OH:21])[CH2:9][O:8][Si:1]([C:4]([CH3:5])([CH3:6])[CH3:7])([CH3:2])[CH3:3])[C:15]1[CH:16]=[CH:17][CH:18]=[CH:19][CH:20]=1Komponenten
3
Versuchsvorschrift
325 mg of (2S,3S)-4-benzyloxy-2,3-epoxy-1-butanol tert-butyldimethylsilyl ether obtained in Example 53, was subjected to Grignard reaction in the same manner as in Example 53 by using 3-tolylmethyl magnesium bromide (0.8M diethyl ether solution). The product was purificated by silica gel column chromatography to obtain 210 mg of (2R,3R)-4-benzyloxy-1-tert-butyldimethylsilyloxy-3-(3-tolylmethyl)-2-butanol as colorless oily substance.