ChemInform Abstract: The Base‐Induced Cascade Rearrangement of 4‐Acetylamino‐3‐arylazo‐1,2,5‐oxadiazole 2‐Oxides (Furoxans) into 4‐Acetylamino‐2‐aryl‐5‐nitro‐2H‐1,2,3‐triazoles.

Abstract

The Base-Induced Cascade Rearrangement of 4-Acetylamino-3arylazo-1,2,5-oxadiazole 2-Oxides (Furoxans) into 4-Acetylamino-2-aryl-5-nitro-2H-1,2,3-triazoles.-The furoxans (I) undergo a mononuclear rearrangement in an aqueous basic medium with the formation of the triazoles (II). A mechanism with two successive (cascade) rearrangements is discussed. The preparation of (I) by known procedures (5 steps) is also given. -(BARYSHNIKOVA, EKATERINA L.; KULIKOV, ALEXANDER S.; OVCHINNIKOV, IGOR V.; SOLOMENTSEV, VLADIMIR V.; MAKHOVA, NINA N.; Mendeleev Commun