The reactions of acyl isocyanates with azomethines belong to the class of 1,4-dipolar cycloaddition reactions. Substituted 3-oxo-1,2,4-thiadiazole 1,1-dioxides were obtained as the result of three-component reactions in the presence of SO2.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1438–1440, June, 1975.
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Arbuzov, B.A., Zobova, N.N. & Rubinova, N.R. Reaction of azomethines with acyl isocyanates in presence of sulfur dioxide. Russ Chem Bull 24, 1333–1335 (1975). https://doi.org/10.1007/BF00922079
- Sulfur Dioxide