Investigation of the migration of the proton in the intramolecular hydrogen bond of ?-dicarbonyl compounds by modelling the 1H and 13C NMR chemical shifts of the limiting structures

1981 ◽  
Vol 17 (2) ◽  
pp. 146-154
Author(s):  
N. N. Shapet'ko ◽  
Yu. S. Bogachev ◽  
S. S. Berestova ◽  
V. G. Medvedeva ◽  
A. P. Skoldinov ◽  
...  
Steroids ◽  
2003 ◽  
Vol 68 (1) ◽  
pp. 43-53 ◽  
Author(s):  
Wajih Al-Soufi ◽  
Pedro Ramos Cabrer ◽  
Aida Jover ◽  
Rosane M. Budal ◽  
José Vázquez Tato

1995 ◽  
Vol 267 (2) ◽  
pp. 299-306 ◽  
Author(s):  
Hidemitsu Kobayashi ◽  
Masahiko Watanabe ◽  
Mariko Komido ◽  
Kyoko Matsuda ◽  
Tomoko Ikeda-Hasebe ◽  
...  

2013 ◽  
Vol 11 (1) ◽  
pp. 101-107
Author(s):  
Vidoslav Dekic ◽  
Biljana Dekic ◽  
Niko Radulovic

Synthesis and detailed spectral analysis of a new 4-substituted coumarin-amino acid derivate are presented in this paper. A new glycine derivate of (3-nitro-2-oxo-2H-chromen-4-yl)amino]acetate was prepared by condensation of 4-chloro-3-nitrocoumarin and ethyl glycinate hydrochloride. The complete assignment of 1H and 13C NMR chemical shifts of the synthesized compound was carried out by the aid of a combination of 1D (1H and 13C NMR) and 2D (1H-1H-COSY, NOESY, HSQC and HMBC) NMR experiments.


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