Infrared, 1H and 13C NMR Spectral Studies of some 4-([1,1′-Biphenyl]-4-yl)-6-(Substituted Phenyl)-5,6-Dihydro-4H-1,3-Oxazine-2-Amines: Assessment of Substituent Effects

About ten titled compounds were prepared by microwave assisted silica-phosphoric acid catalysed cyclization of substituted styryl 4-biphenyl ketones and urea under solvent-free conditions. The infrared frequencies (ν, cm -1 ) of NH 2 , C=N, COC stretches, NMR spectral chemical shifts (δ, ppm) of NH...

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Veröffentlicht in:International letters of chemistry, physics and astronomy physics and astronomy, 2015-05, Vol.50, p.9-16
Hauptverfasser: Thirunarayanan, G., Sathiyendiran, V., Vanangamudi, Ganesan, Arulkumaran, R., Manikandan, V., Suresh, R., Kamalakkannan, D., Sakthinathan, S.P., Sundararajan, R., Sathiyamorthi, K., Balaji, S., Vijayakumar, R., Senbagam, R.
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Sprache:eng
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Zusammenfassung:About ten titled compounds were prepared by microwave assisted silica-phosphoric acid catalysed cyclization of substituted styryl 4-biphenyl ketones and urea under solvent-free conditions. The infrared frequencies (ν, cm -1 ) of NH 2 , C=N, COC stretches, NMR spectral chemical shifts (δ, ppm) of NH 2 , H 4-6 , C=N, and C 4 - 6 were assigned and correlated with Hammett substituent constants, F and R parameters using single and multi-regression analysis. From the results of statistical analysis, the effect of substituents on the infrared frequencies (ν, cm -1 ) and NMR chemical shifts (δ, ppm) has been studied.
ISSN:2299-3843
2299-3843
DOI:10.56431/p-9opx39