Hydrochloric Acid → HCID 86585087, Verbindung
Reaktionsgleichung
[CH3:1][C:2]([O:4][CH2:5][C@H:6]1[O:11][CH:10]=[C:9](OC(C)=O)[C@@H:8]([O:16][C:17]([CH3:19])=[O:18])[C@@H:7]1[O:20][C:21]([CH3:23])=[O:22])=[O:3].N1C=CC=CC=1.Cl.C(Cl)(Cl)Cl.[OH:35][NH2:36]>>[C:17]([O:16][C@H:8]1[C@H:7]([O:20][C:21](=[O:22])[CH3:23])[C@@H:6]([CH2:5][O:4][C:2](=[O:3])[CH3:1])[O:11][CH2:10][C:9]1=[N:36][OH:35])(=[O:18])[CH3:19]Komponenten
Versuchsvorschrift
[litt=F. W. Lichtenthaler and P. Jarglis. Tetrahedron Letters 21 (1980) 1425-1428] To a solution of 2,3,4,6-tetra-O-acetyl-2-hydroxy-D-glucal (7.90 g, 23.9 mmol) in dry pyridine (40 mL, 496 mmol), HONH2, HCl (5.85 g, 84.2 mmol) was added and the mixture was stirred for 24 h. The reaction mixture was concentrated and dissolved in CHCl3 (300 mL). The organic phase was washed with 1 M HCl (aq., 75 mL), sat. aq. NaHCO3 (75 mL) and H2O (75 mL), dried (MgSO4) and evaporated to a syrup of 2, (7.19 g, 99%). By addition of a small volume of EtOH the product crystallysed (4.43 g, 61%, mp 86-89° C.). Two recrystallisations from toluene afforded an analytical sample: mp 90-92° C.; [α]D−39.4° (c 1.3, CHCl3) [Lit. mp 89-90° C., [α]D−39.0 (c 0.4, CHCl3)].
Aufarbeitung
- concentrationThe reaction mixture was concentrated
- dissolutiondissolved in CHCl3 (300 mL)
- washThe organic phase was washed with 1 M HCl (aq., 75 mL), sat. aq. NaHCO3 (75 mL) and H2O (75 mL)
- dry with materialdried (MgSO4)
- customevaporated to a syrup of 2, (7.19 g, 99%)
- additionBy addition of a small volume of EtOH the product
- customTwo recrystallisations from toluene
- customafforded an analytical sample
Quellen und Nachweise
- ORD-Eintrag
- ord-c2c654a76d65450f99f8b801894b52b4
- Quelldatensatz
- uspto-grants-2005_01
- Patentnummer
- US06846505B2
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