Electrochemical Formation of Indazoles from Tropone Tosylhydrazones: Electrochemical Oxidations of Sodium Salts of Tosylhydrazones of Tropone and 2-Phenyltropone
Electrochemical oxidations of the sodium salts of tropone and 2-phenyltropone tosylhydrazones afforded 2-tosyl-2H-indazole and 1-tosyl-7-phenyl-1H-indazole, respectively. The reactions proceeded through the cyclizations of the corresponding hydrazyl radicals generated by electrochemical one electron oxidations of the hydrazone anions.
Reactions of Sodium Salts of Tosylhydrazone Compounds with Silver Chromate. Formation of Indazole, Pyrazole, and Benzonitrile Derivatives
作者:Katsuhiro Saito、Takashi Toda、Toshio Mukai
DOI:10.1246/bcsj.57.1567
日期:1984.6
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 derivatives from 7a, b, and 9, respectively. m-Nitrobenzonitrile is formed by homolytic fission of nitrogen–nitrogen bond of 5. Formation of the pyrazole derivatives can be explained