(+-)-Pantolactone → Keto-pantoyllactone

HRID 399616

Reaktionsgleichung

Reaktionsgleichung von HRID 399616
[CH3:1][C:2]1([CH3:9])[CH:7]([OH:8])[C:5](=[O:6])[O:4][CH2:3]1.ClN1C(=O)N(Cl)C(=O)N(Cl)C1=O>>[CH3:1][C:2]1([CH3:9])[C:7](=[O:8])[C:5](=[O:6])[O:4][CH2:3]1

Komponenten

3

Edukt 2

HCID 989(+-)-PantolactoneHCID 6909Trichloroisocyanuric Acid

Produkt 1

HCID 39Keto-pantoyllactoneAusbeute 98,6 %

Versuchsvorschrift

5 g (38.4 mmol) of pantolactone were reacted with 3.6 g (15.5 mmol) of trichloroisocyanuric acid as described in Example 13. In contrast to Example 13, 63 mg (0.24 mmol) of Tempo derivative D were used as the catalyst. The reaction had finished after 1 hour. After recrystallization of the crude product there were obtained 4.85 g (98%) of ketopantolactone, m.p. 68°-69° C., GC content: 100% (area percent).

Aufarbeitung

  1. customAfter recrystallization of the crude product

Quellen und Nachweise

ORD-Eintrag
ord-a288b4aad0334adc806393786dec98dc
Quelldatensatz
uspto-grants-1998_10
Patentnummer
US05821374

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