Process for the production of monohaloacetylhalides
US4123460A · kind A · utility
0Cited by
1References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1977 |
| Grant date | Oct 31, 1978 |
| Priority date | — |
| Expiry date | Sep 28, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/58
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the production of a monohaloacetylhalide characterized in that a ketene is reacted with a halogen in the presence of a diester of phosphonic acid of the formula: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are the same or different alkyl or aryl, or R.sub.1 and R.sub.2 are the same or different alkyl or aryl and R.sub.3 is --COOR or --CH.sub.2 COOR, wherein R is alkyl or aryl. The diester is a solvent which impedes or prevents the formation of polyhaloacylhalides and which keeps the formation of acylhalides to a minimum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.