Thiophenol → 1-Thiophenyl-3,4,6-tri-O-acetyl-2-deoxy-2-phthalimido-beta-D-glucopyranose

HRID 130003Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 130003
C([O:4][C@@H:5]1[O:18][C@H:17]([CH2:19][O:20][C:21](=[O:23])[CH3:22])[C@@H:12]([O:13][C:14](=[O:16])[CH3:15])[C@H:7]([O:8][C:9](=[O:11])[CH3:10])[C@H:6]1[N:24]1[C:28](=[O:29])[C:27]2=[CH:30][CH:31]=[CH:32][CH:33]=[C:26]2[C:25]1=[O:34])(=O)C.[C:35]1([SH:41])[CH:40]=[CH:39][CH:38]=CC=1.[Sn](Cl)(Cl)(Cl)Cl>ClCCl>[S:41]1[CH:35]=[CH:40][CH:39]=[C:38]1[C@:5]1([O:18][C@H:17]([CH2:12][O:13][C:14](=[O:16])[CH3:15])[C@@H:19]([O:20][C:21](=[O:23])[CH3:22])[C@H:7]([O:8][C:9](=[O:11])[CH3:10])[C@H:6]1[N:24]1[C:25](=[O:34])[C:26]2=[CH:33][CH:32]=[CH:31][CH:30]=[C:27]2[C:28]1=[O:29])[OH:4]

Komponenten

5

Edukt 3

HCID 7969ThiophenolHCID 24287Tin tetrachlorideHCID 2728904beta-D-Glucopyranose, 2-deoxy-2-(1,3-dihydro-1,3-dioxo-2H-isoindol-2-yl)-, 1,3,4,6-tetraacetate

Produkt 1

HCID 867491291-Thiophenyl-3,4,6-tri-O-acetyl-2-deoxy-2-phthalimido-beta-D-glucopyranoseAusbeute 99 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

Compound [2] (0.31-8.02 g, 0.68-17.7 mmol) is dissolved in 3.2-100 ml of dry dichloromethane, and thiophenol (0.15-3.9 g, 1.36-35.4 mmol) and tin tetrachloride 0.35-9.22 g, 1.36-35.4 mmol) are added and the mixture is stirred until reaction is complete. The reaction mixture is diluted and then washed with saturated sodium bicarbonate solution. The crude product compound [3] obtained in this way is purified by chromatography on silica gel with an ethyl acetate/isohexane gradient (0.27-7.14 g, 0.54-14.2 mmol, about 80%) and is dissolved in anhydrous methanol (3-90 ml) and catalytic amounts of sodium methylate (prepared from 0.002-0.05 g of sodium in 0.1-2 ml of methanol) are added. After the reaction is complete, the mixture is neutralized with an acidic ion exchanger (0.2-5 g Amberlite IR-120, H+ -form) (4: 0.21-5.31 g, 0.54-14.1 mmol, about 99% yield). FAB-MS: M+H+ =378. NMR data consistent with Nicolaou et al., J. Am. Chem. Soc. 112:3695 (1990)) and T. J. Caulfield, Ph. D. Dissertation, The University of Pennsylvania (1991).

Aufarbeitung

  1. additionThe reaction mixture is diluted
  2. washwashed with saturated sodium bicarbonate solution

Quellen und Nachweise

ORD-Eintrag
ord-3cc3f1cda6eb42aa98c4f1cd1f894b2f
Quelldatensatz
uspto-grants-1995_11
Patentnummer
US05470843

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