Palladium-Catalyzed Synthesis of <i>N</i>
-Cyclohexyl Anilines from Phenols with Hydrazine or Hydroxylamine via N-N/O Cleavage
作者:Jiang-Sheng Li、Zihang Qiu、Chao-Jun Li
DOI:10.1002/adsc.201700712
日期:2017.10.25
Direct access to amines from biomass‐based phenols via deoxygenative transformation remains greatly challenging in organic synthesis. Herein, we present a palladium‐catalyzed deoxygenative amination of phenols (and their benzyl ether) with hydrazine as nitrogen source. The hydroxylamine/formic acid can be substituted for hydrazine in some cases. This deoxyamination features the involvement of a complex
Formal Cross-Coupling of Diaryl Ethers with Ammonia by Dual C(Ar)–O Bond Cleavages
作者:Dawei Cao、Huiying Zeng、Chao-Jun Li
DOI:10.1021/acscatal.8b02214
日期:2018.9.7
inorganic chemical. Herein, we report a direct conversion of diaryl ethers and ammonia into aniline derivatives and arenes, providing a model for selective lignin 4-O-5 linkage modification and PPO recycling with inexpensive ammonia. Both symmetrical and unsymmetrical diaryl ethers were successfully cross-coupled with ammonia via dual C(Ar)–O bond cleavages, generating the corresponding cyclohexylanilines
In the presence of a supported gold–palladium alloy nanoparticle catalyst (Au–Pd/Al2O3), various kinds of N-substituted anilines can be synthesized from non-aromatic compounds.
Method to convert lignin 4-O-5 diaryl ethers and their model compounds into organic chemicals
申请人:LANZHOU UNIVERSITY
公开号:US10766851B1
公开(公告)日:2020-09-08
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.