Process for preparing dl-cis-1-hydroxy-3-substituted-6,6-dimethyl-6,6a,7,8,10,10a-hexahydro-9H -dibenzo[b,d]pyran-9-ones
US4148809A · kind A · utility
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10Claims
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Key dates
| Filing date | Sep 8, 1977 |
| Grant date | Apr 10, 1979 |
| Priority date | — |
| Expiry date | Sep 8, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D311/80
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Reaction of a 5-substituted resorcinol with a 1-alkoxy-4-(1-hydroxy-1-methylethyl)-1,4-cyclohexadiene in the presence of a suitable catalyst affords the corresponding dl-cis-1-hydroxy-3-substituted-6,6-dimethyl-6,6a,7,8,10,10a-hexahydro-9H-d ibenzo[b,d]pyran-9-one.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.