Magnetically Recyclable Nano-Fe<sub>2</sub>O<sub>3</sub>-Catalyzed Chemoselective Synthesis and Antioxidant Activity of Diethyl (3-((5-Aryl-1<i>H</i>-1,2,4-triazol-3-yl)thio)propyl)phosphonates
作者:M. S. R. Murty、Mohana Rao Katiki、B. Ramalingeswara Rao、Jagadeesh Babu Nanubolu、Sudheer Kumar Buddana、R. S. Prakasham
DOI:10.1080/00397911.2014.918146
日期:2014.9.17
An efficient, green, and chemoselective S-alkylation of 5-aryl-1H-1,2,4-triazole-3-thiones with diethyl (3-bromopropyl)phosphonate in water, catalyzed by nano-Fe2O3 under ligand- and base-free conditions, is reported. Clean reaction, less expensive catalyst, excellent yields, and easy workup are the advantages of the present method. The catalyst can be easily collected by a magnet and recycled without significant loss in catalytic activity. The newly synthesized compounds were screened for their antioxidant property by using 1,1-diphenyl-2-picrylhydrazyl (DPPH) scavenging assay. The majority of the compounds exhibited good antioxidant activity.