Synthesis of n-(2,4-dinitrophenyl)-4-nitrobenzamide (TNBA) using solid acid catalysts
US11834389B2 · kind B2 · utility
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Key dates
| Filing date | May 18, 2021 |
| Grant date | Dec 5, 2023 |
| Priority date | — |
| Expiry date | Mar 12, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/00051
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of making N-(2,4-dinitrophenyl)-4-nitrobenzamide from a mixture of 2,4-dinitroaniline, 4-nitrobenzoyl chloride, and solid acid catalyst in an organic solvent, wherein the solid acid catalyst is not soluble in the organic solvent, the solid acid catalyst being an acidic clay, an ion exchange resin, a beta zeolite, a sulfonated tetrafluoroethylene-based fluoropolymer-copolymer, or some mixture of these.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.