Process for preparing disubstituted urea and carbamate compounds from amines, carbon dioxide, and epoxides
US9233939B2 · kind B2 · utility
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Key dates
| Filing date | Dec 20, 2013 |
| Grant date | Jan 12, 2016 |
| Priority date | — |
| Expiry date | Feb 19, 2034 |
Classification
- Technology area (CPC —)General
Abstract
The present disclosure relates to a method for preparing a disubstituted urea and carbamate compounds simultaneously through a one-pot reaction of an amine, carbon dioxide and an alkylene oxide compound in the presence of an ionic liquid-based complex catalyst system containing indium. In accordance with the present disclosure, a disubstituted urea and carbamate compounds can be prepared simultaneously at high yield. In addition, the ionic liquid-based catalyst containing indium according to the present disclosure is economical because it can be reused several times.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.