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A SIMPLIFIED CADOGEN’S APPROACH TO SYNTHESIS OF NEW THIOPHENYL AND PYRAZOLYL INDAZOLES
M. Prasada Reddy, Ravi Chandra Babu*, M. Sudhalakshmi and A. Siva Rami Reddy
ABSTRACT Thiophene and pyrazol Schiff base have been prepared from the corresponding amines by reaction with 2-nitro benzaldehydes. These nitro compounds undergo de-oxygenative cyclization to give indazoles via nitrenes, on heating with triethylphosphite in acetonitrile. Thiophene and pyrazolyl indazoles have also been synthesized in a one pot reaction. Keywords: Thiophene and pyrazolyl indazoles, one-pot synthesis, simplified cadogan's synthesis de-oxigenative cyclisation. [Download Article] [Download Certifiate] |