High temperature, catalytic Friedel-Crafts synthesis of benzene phosphorus dichloride
US5698736A · kind A · utility
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10References
7Claims
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Key dates
| Filing date | Jan 31, 1997 |
| Grant date | Dec 16, 1997 |
| Priority date | — |
| Expiry date | Jan 31, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/52
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Benzene phosphorus dichloride can be prepared by the reaction of benzene and phosphorus trichloride in the presence of a catalytically effective amount of a Friedel-Crafts catalyst, such as aluminum trichloride or ferric trichloride, at elevated temperature, such as from about 200.degree. C. to about 250.degree. C., and superatmospheric pressure, such as no less than the vapor pressure of the components at the chosen reaction temperature, to insure a liquid reaction medium.
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