Synthesis of spirotriazolines and spirooxadiazolines light-induced 1,3-dipolar [3+2] cycloadditions

Spirotriazolines and spirooxadiazolines are furnished in high yields at room temperature by the light-induced [3+2] cycloaddition with 2,5-diaryltetrazole as the precursor of nitrile imine. The use of light as the unique reagent and broad substrate scope are distinguishing features of this protocol. We developed a strategy for the construction of spirotriazolines and spirooxadiazolines by the light-induced [3+2] cycloaddition with 2,5-diaryltetrazole. The use of light as the unique reagent is a distinguishing feature of this protocol.