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Synthesis 1990; 1990(5): 422-424
DOI: 10.1055/s-1990-26894
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Synthesis of 2-Aryl[1,2,4]triazolo[5,1-b]benzoxazoles by Oxidative Cyclization of N-(Benzoxazol-2-yl)benzamidines

T. Sambaiah* , K. Kondal Reddy
  • *Department of Chemistry, Osmania University, Hyderabad 500007, India
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Publication Date:
17 September 2002 (online)

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The reaction of 2-aminobenzoxazoles with benzonitriles in the presence of anhydrous tin(IV) chloride gives N-(benzoxazol-2-yl)benzamidines in high yields. Cyclodehydrogenation of these compounds with lead(IV) acetate affords 2-aryl[1,2,4]triazolo[5,1-b]benzoxazoles in good yields.