Method of preparing dialkyl dicarbonates
US4929748A · kind A · utility
13Cited by
0References
21Claims
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Assignee
Inventor
Key dates
| Filing date | Dec 7, 1988 |
| Grant date | May 29, 1990 |
| Priority date | — |
| Expiry date | Dec 7, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C68/02
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A dialkyl dicarbonate (dialkyl pyrocarbonate) is prepared by contacting an alkyl haloformate (such as ethyl chloroformate) with an alkali metal carbonate (such as potassium carbonate) in the presence of a catalytic amount of a crown ether (such as 18 crown 6) and a solvating amount of a solvent (such as acetonitrile). The process of the invention is easy to carry out, it does not employ particularly hazardous materials, and provides a high yield of dicarbonate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.