Method to convert lignin 4-O-5 diaryl ethers and their model compounds into organic chemicals
US10766851B1 · kind B1 · utility
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Key dates
| Filing date | Aug 22, 2019 |
| Grant date | Sep 8, 2020 |
| Priority date | — |
| Expiry date | Aug 22, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2601/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
It is provided a method of converting a diaryl ether source such as lignin and/or polyphenylene oxide (PPO) containing 4-O-5 linkages and an inorganic chemical such as ammonia into an organic compound, comprising reacting said diaryl ether source with the inorganic chemical in presence of a catalyst, preferably palladium, transforming the 4-O-5 linkages of said diaryl ether source into the organic compound. It is provided a palladium-catalyzed synthesis of aniline derivatives from 4-O-5 linkage lignin model compounds and cheap industrial inorganic chemical ammonia via dual C(Ar)—O bond cleavage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.