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13C NMR study of quipazines

✍ Scribed by P. Joseph-Nathan; C. García-Martínez

Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
446 KB
Volume
28
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The complete assignment of the ^13^C NMR spectra of a series of biologically active quipazines substituted at position C‐5, C‐6 or C‐7 of the quinoline moiety provides evidence for a strong conjugation between the π‐electron cloud of the pyridine ring and the nitrogen lone pair of the piperazinyl residue. The SCS values of these quipazines are compared with those of the analogous quinolines, and their deviations are discussed in terms of conjugation effects.

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