Synthesis of formazan-3-yltriazolium salts: A new class of formazan and crown-formazan derivatives of expected useful applications-Science-Chemical Encyclopedia-lookchem

Synthesis of formazan-3-yltriazolium salts: A new class of formazan and crown-formazan derivatives of expected useful applications
Add time:08/04/2019 Source:sciencedirect.com

The 1-aza-2-azoniaallene salts 3 react with 3-cyanoformazans 4–6 to give the corresponding 5-(1,5-diarylformazan-3-yl)triazolium salts 7–9 or the rearrangement derivatives 10–12 or the oxidation products 13–15. Reaction of 3a,d with the crown cyanoformazan 18 gave the corresponding crown-formazanyltriazolium salts 19a,d. Oxidation of the formazans 4. 10b with t-BuOCl afforded the corresponding tetrazolium salts 16. 13b.

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