Effect of Trifluoromethyl Substitution on C-3 Position in 1H NMR of Quinolones / Coumarins

Journal Title: JOURNAL OF ADVANCES IN CHEMISTRY - Year 2014, Vol 8, Issue 3

Abstract

The structural assignment of differently substituted quinolones / coumarins was reviewed using 1H NMR spectral data. In case of quinolones / coumarins, with varied substitutions at C-4 and different positions of the benzenoid ring, there is a great variation in the 1H NMR value of the proton only attached with C-3. It was observed that when different substitutions (methyl / amino / hydroxy / acetoxy / trifluoromethyl) were carried out at C-4 position, maximum deshielding with the proton attached with C-3 was observed with trifluoromethyl substitution. The observation is same even with the variation in different groups at the benzenoid ring. 

Authors and Affiliations

Anjali Gupta, Rajinder K. Gupta

Keywords

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  • EP ID EP652661
  • DOI 10.24297/jac.v8i3.4053
  • Views 161
  • Downloads 0

How To Cite

Anjali Gupta, Rajinder K. Gupta (2014). Effect of Trifluoromethyl Substitution on C-3 Position in 1H NMR of Quinolones / Coumarins. JOURNAL OF ADVANCES IN CHEMISTRY, 8(3), 1707-1715. https://europub.co.uk/articles/-A-652661