Preparation of alkyl (alkoxycarbonylcyclohexyl) cyclohexenecarboxylates and dialkyl biphenyldicarboxylates
US5194669A · kind A · utility
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Key dates
| Filing date | Sep 13, 1991 |
| Grant date | Mar 16, 1993 |
| Priority date | — |
| Expiry date | Sep 13, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C67/465
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed are processes for the preparation of alkyl (alkoxycarbonylcyclohexyl)cyclohexenecarboxylates by the dimerization of alkyl 3-cyclohexenecarboxylates and the dehydrogenation of the alkyl (alkoxycarbonylcyclohexyl) cyclohexenecarboxylates to dialkyl biphenyldicarboxylates. The processes are especially useful for the preparation of dialkyl 4,4'-biphenyldicarboxylates which are intermediates in the preparation of high performance polyesters.
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