Synthesis, characterization and pharmacological studies of novel isocoumarins derived from two anti-inflammatory drugs – Diclofenac and Aceclofenac

Pharmaceutical Chemistry Division, School of Advanced Sciences, VIT University, Vellore-632 014, Tamilnadu, India

E-mail : napoleonaa@gmail.com; aanapoleon@vit.ac.in

Organic and Medicinal Chemistry Research Laboratory, Organic Chemistry Division,

School of Advanced Sciences, VIT University, Vellore-632 014, Tamilnadu, India

Two novel isocoumarins 3-{2-[(2,6-dichlorophenyl)amino]benzyl}-1H-isochromen-1-one and (1-oxo-1Hisochromen-3-yl)methyl 2-(3-((2,6-dichlorophenyl)amino)phenyl)acetate were synthesized using two anti-inflammatory drugs Diclofenac and Aceclofenac by conventional heating. The compounds were prepared by dissolving the starting material of the non steroidal anti-inflammatory drug with THF and the corresponding acid chloride formation is done using thionyl chloride followed by condensation reaction of acid chlorides with homophthalic acid. The synthesized compounds were successfully characterized by FT-IR, Mass, ¹H NMR and ¹³C NMR. The compounds were evaluated for pharmacological studies such as antibacterial, antifungal, antioxidant and in vitro anti-inflammatory. Results showed promising antibacterial activity against Staphylococcus aureus, Bacillus subtilis and antifungal activity against Aspergillus, Alternaria species. Synthesized compounds also showed good antioxidant, in vitro anti-inflammatory activities when compared to that of standard.