Process for the preparation of trisubstituted ureas by reductive carbonylation
US5241118A · kind A · utility
8Cited by
6References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 22, 1991 |
| Grant date | Aug 31, 1993 |
| Priority date | — |
| Expiry date | Nov 22, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C273/1809
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for preparing trisubstituted ureas is disclosed. A nitroarene is reacted with carbon monoxide and a secondary amine in the presence of a Group VIII transition metal catalyst and optionally one or more promoters selected from primary amines, halide ion-containing compounds, and chelating phosphorus and nitrogen compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.