A facile synthesis and characterization of some novel benzimidazole derivatives
Rahul B. Shinde, Dattatraya N. Pansare, Rohini N. Shelke, Aniket P. Sarkate, Shailee V. Tiwari, Mukund N. Bangal, Devidas S. Bhagat, Ashok M. Zine
Abstract
We successfully synthesized a series of novel benzimidazole derivatives with high yields in our current research study. The synthesis procedure involved condensing Ethyl 3-[[3-amino-4-(treiethylamino) benzoyl] (pyridine-5-yl) amino]-propanoate with various aromatic carboxylic acids, using EDC.HCl and a small amount of DMAP as catalysts. The resulting compounds underwent cyclization through coupling in the presence of acetic acid under reflux conditions. Notably, both the coupling and cyclization reactions were efficiently achieved, with the former occurring at room temperature and the latter at reflux temperature. Our synthesis method is both environmentally friendly and cost-effective. To characterize the synthesized compounds, we employed modern spectroscopic techniques such as FT-IR, 1H NMR, 13C NMR, and mass spectrometry.