Process for the preparation of pure alkyl alkylacetoacetates
US5786501A · kind A · utility
1Cited by
5References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 25, 1997 |
| Grant date | Jul 28, 1998 |
| Priority date | — |
| Expiry date | Feb 25, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C67/60
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the purification of alkyl alkylacetoacetates of the general formula: ##STR1## in which R.sup.1 is a C.sub.1 -C.sub.10 -alkyl group and R.sup.2 is a C.sub.1 -C.sub.4 -alkyl group. In the process, an alkyl alkylacetoacetate which contains an alkyl alkenylacetoacetate of the general formula: ##STR2## in which R.sup.1 and R.sup.2 have the above-stated meaning, and/or further by-products as an impurity, is converted with an ester of the general formula: ##STR3## in which R.sup.2 has the above-stated meaning, in the presence of a base, into an intermediate which is separated off.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.