Over the last few years research has become more and more important due to it's usefullness to society. Thish book contain synthesis of heterocyclic compounds specially pyrazole aldehyde and various amine of pyridine and thiazole derivatives. Thish book mainly focous on synthesis of schiff base derivatives, charactorization and biological activity of synthesized compounds. Thish book is usefull for research students whoever working in the field of synthetic organic chemistry.