In this research, a Schiff base complex magnetic nanocatalyst was designed and prepared. The structure of Fe3O4@CS-SB-CaMgFe2O4 nanocatalyst was characterized using FT-IR, XRD, VSM, FE-SEM, EDX, Mapp scanning, BET, and TGA techniques.
We provide a comprehensive overview of recent progress in this rapidly growing field by summarizing catalytic annulation reactions of ortho-alkynyl aryl ketones which involve carbo- and oxo-cyclization patterns with consideration of their mechanisms and applications.
An [IPrAu(I)]+-enabled facile construction of 1-peroxidized 1H-isochromenes from 2-alkynyl-1-carbonylbenzenes and TBHP via tandem cyclization/nucleophilic addition was successfully achieved.
A novel and highly efficient synthetic strategy toward dihydronaphthalenes via a cerium-catalyzed cycloaddition reaction has been developed.
The advancements in heterocycle synthesis through BF3·OEt2 catalyzed/mediated cyclization of alkynes have been highlighted.