The book on Synthetic Chemistry & Heterocyclic System: The Relation with Sub-Title 'Synthesis and Biological Screening of some Halogenated Heterocyclic Compounds' is primarily intended to boost the attention of researchers in heterocyclic chemistry. The easy methods of synthesis of various heterocyclic compounds will help the researchers to develop the advances in their methodology. A large number of syntheses of various analogs included for better understanding of the subject. This book would serve as a requisite reference for synthesis of heterocyclic compounds for researchers. Further the biological assay of synthesized compounds will definitely enhance the knowledge of research work.