Sodium arabinate → D-Arabinonic acid
Reaktionsgleichung
[O:1]=[C:2]([O-:11])[C@H:3]([C@@H:5]([C@@H:7]([CH2:9][OH:10])[OH:8])[OH:6])[OH:4].[Na+]>O>[O:1]=[C:2]([OH:11])[C@H:3]([C@@H:5]([C@@H:7]([CH2:9][OH:10])[OH:8])[OH:6])[OH:4]Komponenten
3
Edukt 1
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
One mole of sodium arabinonate (188 g) in 300 ml of water was acidified on an acid cation exchange resin, giving a solution of arabinonic acid. The arabinonic acid was transformed into the γ-lactone by concentrating in vacuum the aqueous solution to about 200 ml when 300 ml of butanol is added. After a third concentration, the solution is removed from the flask with the aid of 100 ml of butanol and seeded. Crystallization begins at once and a large crop of crystals forms. The crystalline product (115 g) is collected on a filter, washed with butanol and dried.
Quellen und Nachweise
- ORD-Eintrag
- ord-16d94e34416b45479e241a3f72afdd3d
- Quelldatensatz