Abstract
Acetyl-2-chloro-3-lithiopyridine ethylene glycol ketal and 2-acetyl-4-chloro-3-lithiopyridine ethylene glytcol ketal were reacted with aromatic aldehydes and oxidation of the resulting alcohols provided the corresponding 3-aroylpyridines. These intermediateds were transformed by hydrazine hydrate to 4-acetyl-3-aryl-1H-pyrazolo [3,4-b]- and -[4,3-c] pyridine ethylene glycol ketals, which afforded the title compounds, respectively, by acid hydrolysis
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