Studies toward c n c o c s and c se bonds formations for the construction of five membered heterocycles

Abstract

The thesis consists of five chapters First chapter presents the cycloaddition of oxiranes with isoselenocyanates using BF3 226 710 8482 Et2O This procedure is allows to access 2 imino 1 3 oxaselenolanes and 2 oxazolidinones in good to high yields with wide variety of substrate scope In chapter 2 Fe catalyzed synthesis of azolidines are described by the the cycloaddition of aziridines with isocyanates isothiocyanates isoselenocyanates and carbodiimides is demonstrated using Fe NO3 3 226 710 8482 9H2O in aqueous