Tandem acid-promoted intramolecular azide-hydrazone electrocyclization/hydrolysis approach for the synthesis of N-Aminotetrazoles

A general method for the synthesis of a series of previously unknown N-(heteroaryl)-and N-(aryl) aminotetrazoles through the tandem electrocyclization/hydrolysis of azidohydrazones was accomplished. The described protocol was suitable for a wide array of the target N-substituted aminotetrazoles which were prepared in good to high yields under smooth reaction conditions. Importantly, the presented approach is considered as a direct route to 1,2,5-oxadiazole-substituted aminotetrazole derivatives in good and high yields and may be realized on a gram scale. Therefore, facile synthesis of N- (heteroaryl)- andN-(aryl)aminotetrazoles unveils novel opportunities to study application prospectives of these compounds as functional materials or drug candidates. (c) 2021 Elsevier Ltd. All rights reserved.