Tin tetrachloride → 4-O-(2,3,4,6-tetra-O-acetyl-alpha-D-galactopyranosyl)-2,3,6-tri-O-acetyl-beta-D-glucopyranosyl azide

HRID 991155Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 991155
C(O[C@@H:5]1[O:42][C@H:41]([CH2:43][O:44][C:45](=[O:47])[CH3:46])[C@@H:16]([O:17][C@@H:18]2[O:35][C@H:34]([CH2:36][O:37][C:38](=[O:40])[CH3:39])[C@H:29]([O:30][C:31](=[O:33])[CH3:32])[C@H:24]([O:25][C:26](=[O:28])[CH3:27])[C@H:19]2[O:20][C:21](=[O:23])[CH3:22])[C@H:11]([O:12][C:13](=[O:15])[CH3:14])[C@H:6]1[O:7][C:8](=[O:10])[CH3:9])(=O)C.C[Si]([N:52]=[N+:53]=[N-:54])(C)C.Cl[Sn](Cl)(Cl)Cl>C(Cl)Cl>[C:21]([O:20][C@@H:19]1[C@@H:24]([O:25][C:26](=[O:28])[CH3:27])[C@@H:29]([O:30][C:31](=[O:33])[CH3:32])[C@@H:34]([CH2:36][O:37][C:38](=[O:40])[CH3:39])[O:35][C@@H:18]1[O:17][C@@H:16]1[C@@H:41]([CH2:43][O:44][C:45](=[O:47])[CH3:46])[O:42][C@@H:5]([N:52]=[N+:53]=[N-:54])[C@H:6]([O:7][C:8](=[O:10])[CH3:9])[C@H:11]1[O:12][C:13](=[O:15])[CH3:14])(=[O:23])[CH3:22]

Komponenten

5

Edukt 3

HCID 24287Tin tetrachlorideHCID 78378AzidotrimethylsilaneHCID 2802067Lactose octaacetate

Produkt 1

HCID 233928434-O-(2,3,4,6-tetra-O-acetyl-alpha-D-galactopyranosyl)-2,3,6-tri-O-acetyl-beta-D-glucopyranosyl azideAusbeute 90 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel2×

Versuchsvorschrift

A mixture of β-lactose octaacetate (203 mg, 0.3 mmol), trimethylsilyl azide (41 mg, 0.35 mmol), and SnCl4 (40 mg, 0.15 mmol) in CH2Cl2 (1.5 ml) was stirred overnight at room temperature. The solution was diluted with CH2Cl2 (20 ml) and washed twice with 1 M potassium fluoride solution (5 ml), water (5 ml) and evaporated affording 4-O-(2,3,4,6-tetra-O-acetyl-α-D-galactopyranosyl)-2,3,6-tri-O-acetyl-β-D-glucopyranosyl azide (25) (178 mg 90%).

Aufarbeitung

  1. washwashed twice with 1 M potassium fluoride solution (5 ml), water (5 ml)
  2. customevaporated

Quellen und Nachweise

ORD-Eintrag
ord-f2796038b5264caea933d86126f27f55
Quelldatensatz
uspto-grants-2002_10
Patentnummer
US06462183B1

Notizen zur Reaktion

Wird geladen…