Structurally diverse heterocycles represent a class of medicinally and biologically important chemical entities,and their chemical synthesis has attracted a great deal of attention from organic chemists.Presently,a large number of different synthetic methodologies have been developed for the construction of structurally complex and diverse hetereocycles.Moreover,the cycloaddition reactions have functionedas the efficient and robust strategies for the synthesis of heterocycles.Despite the tremendous advances with respect to the synthesis of heterocycles via cycloaddition reactions,the further development of novle cycloaddition reactions remaines highly demanded for the synthesis of unknown biologically active heterocycles.On the basis of the previous works of our and other research groups,we have successfully designed some novel cycloaddition reactions,which enabled the easy construction of the potential bioactive hetereocycles.It has been demonstrated that these cycloaddition reactions underwent readily under the optimal reaction conditions,and furnished the desired hetereocycles in reasonable chemical yields and stereoselectivities.Moreover,the attempted cycloaddition reactions exhibited the excellent and wide substrate scopes.