Hydrochloric Acid → 2-Methoxy-5-((3R,4S,5R,6R)-3,4,5-tris-benzyloxy-6-benzyloxymethyl-2-hydroxy-tetrahydro-pyran-2-yl)-benzaldehyde
Reaktionsgleichung
[CH2:1]([O:8][C@@H:9]1[C@@H:14]([O:15][CH2:16][C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)[C@H:13]([O:23][CH2:24][C:25]2[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=2)[C@@H:12]([CH2:31][O:32][CH2:33][C:34]2[CH:39]=[CH:38][CH:37]=[CH:36][CH:35]=2)[O:11][C:10]1([C:41]1[CH:46]=[CH:45][C:44]([O:47][CH3:48])=[C:43]([CH:49]2OCC[O:50]2)[CH:42]=1)[OH:40])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.Cl>C1COCC1>[CH3:48][O:47][C:44]1[CH:45]=[CH:46][C:41]([C:10]2([OH:40])[C@H:9]([O:8][CH2:1][C:2]3[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=3)[C@@H:14]([O:15][CH2:16][C:17]3[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=3)[C@H:13]([O:23][CH2:24][C:25]3[CH:26]=[CH:27][CH:28]=[CH:29][CH:30]=3)[C@@H:12]([CH2:31][O:32][CH2:33][C:34]3[CH:39]=[CH:38][CH:37]=[CH:36][CH:35]=3)[O:11]2)=[CH:42][C:43]=1[CH:49]=[O:50]Komponenten
4
Versuchsvorschrift
To a stirred solution of compound prepared in step II (4.80 g, 6.68 mmol) in THF (20 mL) was added 6N HCl (10 mL) and stirred for 16 h. This reaction mixture was concentrated under reduced pressure, diluted with ethyl acetate (100 mL) washed with sat. NH4Cl (20 mL), dried over sodium sulfate, concentrated and purified by silica gel column chromatography to furnish 2-Methoxy-5-((3R,4S,5R,6R)-3,4,5-tris-benzyloxy-6-benzyloxymethyl-2-hydroxy-tetrahydro-pyran-2-yl)-benzaldehyde (3.2 g).