Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels.In a patent， Application In Synthesis of 9H-Pyrido[3,4-b]indole, Which mentioned a new discovery about 244-63-3
Polystyrene-supported N,N-dimethylethylenediamine Pd(II) complex C 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 C could be easily recovered by simple filtration and reused for five cycles without any significant decrease in its activity.
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Reference：
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles