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Synthesis of 3-methyl-1,5-diphenyl-7-aryl-7,8-dihydro-6H-pyrazolo[4,5-b]azepines by Chintalapani Venkata Narsimha Reddy, Eligeti Rajanarendar and Ananthula Krishnamurthy is a scholarly article available to read on EtoBox.

What is Synthesis of 3-methyl-1,5-diphenyl-7-aryl-7,8-dihydro-6H-pyrazolo[4,5-b]azepines about?

3,5-Dimethyl-4-nitro-1-phenylpyrazole (I) on treatment with chalcones II under phase transfer conditions gives the Michael adducts, 3-methyl-4-nitro-1-phenyl-5-(2-aryl-4-phenyl-4-oxo-1-butyl)pyrazoles (III). The Michale adducts on cycloreduction with stannous chloride-hydrochloric acid furnish 3-methyl-1,5-diphenyl-7-aryl-7,8-dihydro-6H-pyrazolo[4,5-b]azepines (IV). IR, 1H NMR, 13C NMR and mass spectra support the structures of III and IV.

Author

Chintalapani Venkata Narsimha Reddy, Eligeti Rajanarendar and Ananthula Krishnamurthy

Published

1990

Language

EN