Palladium‐Catalyzed Methylation of Nitroarenes with Methanol
作者:Lin Wang、Helfried Neumann、Matthias Beller
DOI:10.1002/anie.201814146
日期:2019.4.8
procedure for the synthesis of N‐methyl‐arylamines directly from nitroarenes using methanol as green methylating agent was developed. The key to success is the use of a specific catalyst system consisting of palladium acetate and the ligand 1‐[2,6‐bis(isopropyl)phenyl]‐2‐[tert‐butyl(2‐pyridinyl)phosphino]‐1H‐Imidazole (L1). The generality of this protocol is demonstrated in the synthesis of more than 20