Process for the preparation of polyhalogenphenyl carbamates
US4347377A · kind A · utility
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8Claims
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Assignee
Inventors
Key dates
| Filing date | Sep 19, 1980 |
| Grant date | Aug 31, 1982 |
| Priority date | — |
| Expiry date | Sep 19, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C271/06
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention concerns a new process for the preparation of polyhalogenphenyl carbamates of the formula (I) EQU R.sup.2 -OCONHR.sup.1 (I) wherein PA1 R.sup.1 is alkyl, aralkyl or aryl, where the aromatic rings may optionally be substituted; and PA1 R.sup.2 is phenyl substituted with three, four or five halogens, through intermediates of the formula (IV) EQU (R.sup.2 --O).sub.2 C.dbd.NR.sup.1 (IV) wherein R.sup.1 and R.sup.2 are as defined above. The compounds of the formula (I) are valuable acylating agents. The intermediates of the formula (IV) are new compounds, which are also encompassed by the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.