The easily obtainable 5-chloro-1-phenyl-1H-pyrazole-4-carbaldehydes 2 were used as precursors in Sonogashira-type cross-coupling reactions with various alkynes to provide the corresponding 5-alkynyl-1H-pyrazole-4-carbaldehydes 3. Treatment of these with tert-butylamine with microwave assistance afforded the corresponding 1-phenylpyrazolo[4,3-c]pyridines 4. The oximes 5 – derived from the aldehydes