The present book entitled Synthesis and biological screening of some heterocyclic compounds describes the syntheses of compounds such as chromones, pyrazolines, benzothiazepines, chlorochromones, salicyloyl pyrazoles, organophosphorus compounds, pyrimidines, halogenated thiadiazoles and triazoles containing pyridine, dibenzofuran, quinoline, indazole and pyrazole moieties.The structures of all compounds were assigned on the basis of IR, NMR and mass spectrum. Purity of the compounds was checked by TLC on silica gel G plates.