Tropone tosylhydrazone sodium salt was allowed to react with silver chromate to give 2-tosyl- 2H-indazole. The reaction is thought to proceed through the cyclization of the hydrazyl radical intermediate. Under the same conditions, sodium salts of m-nitrobenzaldehyde tosylhydrazone (5), benzylideneacetone tosylhydrazone derivatives (7a and 7b), and β- ionone tosylhydrazone (9) reacted to yield m-nitrobenzonitrile from 5 and pyrazole ...
