Sarkar, Tanumay2024-02-052024-02-052022ROLL NO.166122032https://gyan.iitg.ac.in/handle/123456789/2537Supervisor: Punniyamurthy, TThe thesis is divided into four chapters. The first chapter illustrates a Ru(II)-catalyzed siteselective C-H acyloxylation of N-aryl-2-pyrimidines with carboxylic acids as the acyl source. The second chapter describes a Ni(II)-catalyzed oxidative C-H heteroarylation of arenes with azoles utilizing a removable oxazoline-based directing auxiliary. The third chapter deals with the Bi(III)- catalyzed annulation of 2-naphthols with N-sulfonylaziridines. The fourth chapter demonstrates (3+3)-cycloaddition of aziridines with diaziridines for the stereospecific synthesis of triazines under Fe(III)-catalysis.enTransition-Metal-CatalysisDirecting Group StrategyStrained Ring HeterocyclesThesis