Organic chemistry plays an important part in our daily life because food, clothes, paper, ink, rubber, soap, perfumes, medicines etc. are indispensable to us for proper living. Organic compounds are important constituents of many products e.g., paint, food, plastic, explosive, medicine, petrochemical, pesticide etc. Further, the study of organic chemistry is important for chemists and pharmacists in order to synthesize medicines for the alleviation of human suffering. Heterocyclic compounds are one of the most important classes of compounds which are of great importance in pharmaceutics because of their specific chemical reactivity. Nitrogen containing heterocycles are structural constituent of a variety of active pharmaceuticals, biologically active natural and non-natural compounds.