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Reaction of 6-aryl-1,5-diazabicyclo[3.1.0]hexanes with aryl isocyanates and aryl isothiocyanates
Molchanov,Sipkin,Koptelov,Kostikov
, p. 1779 - 1780 (2007/10/03)
Heating 6-aryl-1,5-diazabicyclo[3.1.0]hexanes in the presence of aryl isocyanates or aryl isothiocyanates leads to the formation of the corresponding 2,3-diarylperhydropyrazolo[1,2-a][1,2,4]triazol-1-one or 2,3-diarylperhydropyrazolo[1,2a][1,2,4]triazol-1-thione in good yield as a result of 1,3-dipolar cycloaddition of isocyanate (isothiocyanate) to an initially formed ylide.
