Rates of acid-catalyzed NH proton exechange of enaminones, an H NMR study
Author(s):
Shaabania. , Sadeghi Nejat , F
Abstract:
1H NMR spectra of a series of enaminones R-CO-CH=C (NHCH2Ph) -R[1, R=CH3; 2, R=C6H5; 3, R=CF3; 4, R=CH2CH2CH2; 5, R=CH2C (CH3) 2CH2], were obtained in the presence of trifluoroacetic acid in CDCl3 or DMSO-d6 at 28ـC. Steric, solvent, electronic and hydrogen bonding effects on the rates of acid-catalyzed NHproton exchanges were investigated. Rate constants were calculated by the 1H NMR lineshape analysis.
Language:
English
Published:
Iranian Journal of Chemistry and Chemical Engineering, Volume:19 Issue: 1, May-Jun 2000
Page:
29
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