Preparation of gamma-pyrones
US4082717A · kind A · utility
6Cited by
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14Claims
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Key dates
| Filing date | Sep 9, 1976 |
| Grant date | Apr 4, 1978 |
| Priority date | — |
| Expiry date | Sep 9, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D309/32
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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 gamma-pyrones are prepared in analogous manner from appropriate alcohols.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.