Synthesis of Indanone based spirocyclic molecules

Synthesis of indanone based spirocyclic molecules following 1,3-dipolar cycloaddition reaction consists of two chapter. Chapter I deals withone pot, three component synthesis of spiroindenoquinoxaline pyrrolidine fused nitrochromene derivatives following 1,3-dipolar cycloaddition. Chaapter II deals with one pot, three component 1,3-dipolar cycloaddition: Regio and diastereoselective synthesis of spiropyrrolidinyl indenoquinoxaline based chromene nitrile derivatives.