Reaction of azomethines with acyl isocyanates in presence of sulfur dioxide

Abstract

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. © 1975 Plenum Publishing Corporation