Mastoor S, Faizi S, Saleem R, Siddiqui BS. NMR study of O and N, O-substituted 8-quinolinol derivatives.
MAGNETIC RESONANCE IN CHEMISTRY : MRC 2014;
52:115-121. [PMID:
24327567 DOI:
10.1002/mrc.4034]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Revised: 11/01/2013] [Accepted: 11/05/2013] [Indexed: 06/03/2023]
Abstract
The (1)H and (13)C NMR spectral study of several biologically active derivatives of 8-quinolinol have been made through extensive NMR studies including homodecoupling and 2D-NMR experiments such as COSY-45°, NOESY, and HeteroCOSY. Electron donating resonance and electron withdrawing inductive effect of several groups showed marked changes in chemical shifts of nuclei at the seventh positions of O-substituted quinolinols (2-15). Although in N-alkyl, 8-alkoxyquinolinium halides (16-21), ring A rightly showed low frequency chemical shift values.
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