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http://dx.doi.org/10.5012/bkcs.2011.32.8.2700

Preparation of Fully Substituted 1,3,4-Oxadiazole Derivatives from N-Isocyaniminotriphenylphosphorane, (E)-Cinnamic Acids, Chloroacetone and Primary Amines  

Ramazani, Ali (Chemistry Department, Zanjan University)
Nasrabadi, Fatemeh Zeinali (Chemistry Department, Zanjan University)
Karimi, Zahra (Chemistry Department, Zanjan University)
Rouhani, Morteza (Young Researchers Club, Zanjan Branch, Islamic Azad University)
Publication Information
Abstract
The 1:1 imine intermediate generated by the addition of primary amine to chloroacetone is trapped by N-isocyaniminotriphenylphosphorane in the presence of (E)-cinnamic acids and the corresponding iminophosphorane intermediate was formed. Disubstituted 1,3,4-oxadiazole derivatives are formed via intramolecular aza-Wittig reaction of the iminophosphorane intermediate. The reactions were completed in neutral conditions at room temperature. The disubstituted 1,3,4-oxadiazole derivatives were produced in excellent yields.
Keywords
N-Isocyaniminotriphenylphosphorane; Chloroacetone; (E)-Cinnamic acid; 1,3,4-Oxadiazole; aza-Wittig reaction;
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