Synthesis of novel benzothiophene derivatives via cyclization reactions

Benzothiophenes and their derivatives have been gained big importance as important candidates for pharmaceutical applications since they show remarkable analgesic, antibacterial, anti-inflammatory, antiparasitic, antifungal, hypoglycemic, antitumor and anticancer activities. They have also essential compounds for agrochemical and material sciences. Different kind of synthetic methods were employed for the synthesis of benzothiophene structures in literature. Moreover, they have been isolated from different kinds of plants and used to treat different type of diseases for many years. In the present study, a novel methodogies were investigated for the synthesis of anisole substituted benzothiophene derivatives. A variety of organic reactions were performed for the formation of desired benzothiophenes such as, Pd-catalyzed Sonogashira Coupling Reactions, Electrophilic Cyclization Reactions and Stille Coupling reactions. All synthesized compounds were characterized by using 1H-NMR, 13C-NMR, IR and HRMS. Key words: Benzothiophenes, Cyclization reactions, Sonogashira coupling reactions.