Processes for preparing aklylene and dialkyl ketals and alkyl alpha-enol ethers of alpha-acetyl cinnamic acids or esters thereof
US4786748A · kind A · utility
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Key dates
| Filing date | Oct 13, 1987 |
| Grant date | Nov 22, 1988 |
| Priority date | — |
| Expiry date | Oct 13, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C69/618
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Alkylene or dialkyl ketal of an alpha-acetyl cinnamic acid or ester therof are obtained by reacting alpha-acetyl cinnamic acid or an ester thereof with a ketalizing agent selected from the group consisting of alkyl glycols, dialkyl detals and trialkyl orthoesters in the presence of the transition metal catalyst and an acid catalyst. Also, alkyl alpha-enol ethers of alpha-acetyl cinnamic acid are obtained by heating the alkylene or dialkyl ketals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.