Process for the preparation of aryl haloformates and diaryl carbonates
US5424473A · kind A · utility
21Cited by
9References
19Claims
0Family size
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Key dates
| Filing date | Mar 16, 1994 |
| Grant date | Jun 13, 1995 |
| Priority date | — |
| Expiry date | Mar 16, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C68/02
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process of preparing diaryl carbonates, such as diphenyl carbonate, and aryl haloformates, such as phenyl chloroformate. The process involves contacting phenol or a substituted phenol with a carbonyl halide, such as phosgene, in the presence of a phosphorus-containing catalyst. The catalyst is selected from alkyl phosphates, aryl phosphites, aryl phosphates, organic phosphinites and phosphinates, organic pyrophosphates, inorganic phosphorous and phosphoric acids, and phosphorus oxides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.