Ruthenium-Catalyzed Aminomethylation and Methylation of Phenol Derivatives Utilizing Methanol as the C<sub>1</sub>Source
作者:Seoksun Kim、Soon Hyeok Hong
DOI:10.1002/adsc.201601117
日期:2017.3.6
involving ortho‐aminomethylation of phenol was developed via ruthenium‐catalyzed dehydrogenation of methanol, an environmentally benign C1 building block, without the use of reactive reagents. The reaction was successfully applied to a range of substrates. When naphthol was employed instead of phenol, only methylation was observed. On the basis of various mechanistic studies, we propose that formamide barely
phenols were prepared and investigated by 1H and 13C NMR spectroscopy in chloroform-d1 solution. The chemical shifts of intramolecular hydrogen-bonded protons in Mannich bases depend on the pKa of the parent phenols. A correlation between Hammett's constants, σp, and 13C NMR chemical shifts of para carbon atoms has been found. All the results obtained from 1H and 13C NMR spectra show that in the case