Introduction: Recently, Wang Chen of Shaoxing University and Naohiko Yoshikai Research Group of Tohoku University of Japan designed and developed a new type of Co/Al and Co/Mg bimetallic catalyst, which contains phosphine/secondary phosphine oxide (PSPO) bifunctional ligand, which can be used for site-selective C-H alkylation of azaromatics and alkynes. These catalysts can make pyridine, pyridone
