Polystyrene‐supported Pd(II) complex‐catalysed carboacylation of 2‐arylpyridines with alcohols via C─H bond activation under solvent‐free conditions

Polystyrene-supported N,N-dimethylethylenediamine Pd(II) complex was used as an efficient catalyst for the synthesis of aromatic ketones via ortho-acylation of sp2 C─H bonds of 2-arylpyridines with alcohols as effective coupling partners. The alcohols were oxidized with tert-butyl hydroperoxide to their corresponding aldehydes in situ and efficiently coupled with 2-arylpyridines to form aryl ketones under solvent-free conditions. Furthermore, catalyst could be easily recovered by simple filtration and reused for five cycles without any significant decrease in its activity.