Preparation of gamma-pyrones

Details Preparation of gamma-pyrones Preparation of gamma-pyrones

1979-09-04

1982-04-06

Chan, Nicky

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2603459R, C07D30922

Patent

active

043235069

ABSTRACT:
2-Methyl-3-hydroxy-4H-pyran-4-one is prepared by contacting 1(2-furyl)-1-ethanol in aqueous solution with two equivalents of a halogen oxidant at room temperature and then heating until the hydrolysis of the formed 4-halo-dihydropyran intermediate is substantially complete. Other valuable related gammapyrones are prepared in analogous manner from appropriate alcohols.

REFERENCES:
Torii et al., Chemistry Letters, No. 5, pp. 495-498, (1976).
Paulsen et al., Tet. Lett., No. 49-50, pp. 4377-4380, (1974).
Hajivarnava et al., Carbo. Res., 49, pp. 93-102, (1976).

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