Basic alumina supported one-pot synthesis of structurally diverse pyridine/quinolinine-fused novel diazepanium, diazocanium, imidazodilinium and tetrahydro-pyrimidiniums
作者:Rupankar Paira、Arindam Maity、Shyamal Mondal、Subhendu Naskar、Krishnendu B. Sahu、Pritam Saha、Abhijit Hazra、E. Padmanaban、Sukdeb Banerjee、Nirup B. Mondal
DOI:10.1016/j.tetlet.2011.01.134
日期:2011.4
Basic alumina supported solvent-free one-pot synthesis of pyridine-fused polycyclic diazepaniums was achieved under microwave irradiation. The process was successfully extended to the synthesis of pyridine-fused bicyclic imidazolidiniums and tetrahydro-pyrimidiniums and also of tri- and tetracyclic diaza-heterocycle-fused quinoliniums. The dual characteristic of basic alumina, a solid support as well as a base, was successfully employed in the current investigation. The method emerged to be an effective route in terms of product yield, reaction time, and ease of purification and most importantly for environment friendly protocols. (c) 2011 Elsevier Ltd. All rights reserved.