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One‐pot Synthesis of a 3,4,5‐Triaryltriazole from the Subsitituted 1,3,4‐Oxadiazole: Crystal Structures Characterization
Authors:Jing‐Jing Jiang  Guo‐Ping Shen  Xin He  Xuan Shen  Dun‐Ru Zhu
Affiliation:College of Chemistry and Chemical Engineering, State Key Laboratory of Materials‐oriented Chemical Engineering, Nanjing University of Technology, Nanjing, China
Abstract:Two heterocyclic compounds, 2‐(p‐bromophenyl)‐5‐(2‐pyridyl)‐1,3,4‐oxadiazole ( 1 ) and 3‐(p‐bromophenyl)‐4‐phenyl‐5‐(2‐pyridyl)‐1,2,4‐triazole ( 2 ) were successfully synthesized and characterized by UV–vis, FTIR, 1H NMR, ESI‐MS spectra, elemental analysis, and single crystal X‐ray crystallography. The structural analysis indicates that 1 is almost a planar molecule but 2 not. The crystal structure of 1 is stabilized by two kinds of intermolecular π–π interactions and two types of intermolecular C–H···N hydrogen bonds, whereas 2 by three kinds of C–H···π interactions and three types of intermolecular C–H···N hydrogen bonds. Additional, 2 can be prepared directly from 1 in an aniline solution at 190°C in a yield of 70%.
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