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
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.
Nitroderivatives are transformed to cyclohexylanilines at room temperature in good yields and selectivity via a hydrogenation-amine coupling cascade reaction using Pd nanoparticles on carbon as a catalyst and a Brönsted acid.