Infrared spectra of 2α-substituted 3-oxotriterpenoids and conformation of ring A

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Title:Infrared spectra of 2α-substituted 3-oxotriterpenoids and conformation of ring A
Creators:
Klinot, Jiří
Hilgard, Stanislav
Krijt, Jakub
Olšovský, Petr
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 56, 5, pp. 966-972

Abstract

Infrared spectra of triterpenoid 19β,28-epoxy-18α-oleanane 3-ketones <i>I - VI</i> in the region of carbonyl stretching frequencies have been studied. Comparison of the spectra of crystals with those of solutions in various solvents, together with comparison of fundamental C=O frequencies with their first overtone leads to the conclusion that the doublet character of the carbonyl band in the solution of ketones <i>I - IV</i> with polar substituent in position 2α is caused by the chair-boat equilibrium of the ring A.

Title:Infrared spectra of 2α-substituted 3-oxotriterpenoids and conformation of ring A
Creators:
Klinot, Jiří
Hilgard, Stanislav
Krijt, Jakub
Olšovský, Petr
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:56
Number:5
Page Range:pp. 966-972
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc19910966UNSPECIFIED
ID Code:5014
Item Type:Article
Deposited On:22 Feb 2010 11:28
Last Modified:22 Feb 2010 10:28

Citation

Klinot, Jiří; Hilgard, Stanislav; Krijt, Jakub; Olšovský, Petr (1991) Infrared spectra of 2α-substituted 3-oxotriterpenoids and conformation of ring A. Collection of Czechoslovak Chemical Communications, 56 (5). pp. 966-972. ISSN 0010-0765

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