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Synthesis 1988; 1988(12): 994-995
DOI: 10.1055/s-1988-27781
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A Facile 1,3-Dipolar Cycloaddition of Nitrile Oxides to Chlorocarbonyl Isocyanate: Synthesis of 4-Chlorocarbonyl-5-oxo-4,5-dihydro-1,2,4-oxadiazoles

K. Rama Rao* , Y. V. D. Nageswar, A. Gangadhar, P. B. Sattur
  • *Organic Chemistry-1, Regional Research Laboratory, Hydrabad-500 007, India
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Publication Date:
20 August 2002 (online)

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The 1,3-dipolar cycloaddition of substituted benzonitrile oxides to the C=N group of chlorocarbonyl isocyanate in chloroform gives potentially useful 3-aryl-4-chlorocarbonyl-5-oxo-4,5-dihydro-1,2,4-oxadiazoles in 75-80% yields.