Processes using a phosphorus complex
US4814467A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 1988 |
| Grant date | Mar 21, 1989 |
| Priority date | — |
| Expiry date | Jan 22, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for chlorinating compounds containing a carbon atom bonded to a hetero-atom selected from the group consisting of oxygen, nitrogen and sulfur; said process comprises contacting the carbon hetero-atom containing compound with a chloro phosphorus complex of the formula EQU RP.sup..sym. CL.sub.3 P.sup..crclbar. Cl.sub.6 wherein R is selected from the group consisting of aryl, substituted aryl, alkyl and substituted alkyl, so that the hetero-atom is replaced by at least one chlorine atom; compounds capable of being chlorinated can include, for example, carboxylic acids, acid chlorides, ketones, aldehydes, alcohols, epoxides, esters, anhydrides, ethers, thiols, and aromatic nitro groups; the reaction can be extended to compounds containing the carbon to chlorine bond alpha to a carbon atom containing at least one hydrogen atom, it can be further dehydrochlorinated, e.g., by either heating to a temperature ranging from about 50.degree. C. to about 300.degree. C. or by reaction with a base selected, e.g., from alkali metal hydroxides and alkoxides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.