Hydrosilylation of olefins catalyzed with cobalt(II)-dehydroacetic acid complexes and self-supported catalysts

Dehydroacetic acid [3-acetyl-4-hydroxy-6-methyl-2H-pyran-2-one, DHA] can provide O,O′-bidentate coordination sites, and the conjugated π system (CC–CO) in the dehydroacetic acid molecules can effectively stabilize the electronic state of the metal center. This characteristic makes dehydroacetic acid an important ligand in the fields of coordination chemistry and catalysis. A series of cobalt(II)-dehydroacetic acid complexes have been successfully prepared and utilized insoluble cobalt salts to support dehydroacetic acid, creating self-supported catalysts. These two types of catalysts can efficiently catalyze the hydrosilylation reaction of various olefins under mild conditions. Compared to traditional catalysts, these two types of catalysts not only exhibit significantly enhanced catalytic activity but also show superior selectivity for the reaction products.