Reactions of lead tetra-acetate. Part V. The synthesis of 1-phenylindazole and some derivatives, pyridylindazoles, and thienopyrazoles
Abstract
The method for synthesising indazoles from the arylhydrazones of aromatic ketones, by oxidation with lead tetraacetate followed by cyclisation of the resulting azoacetates with a Lewis acid, has been extended to members of the groups of compounds named in the title.