Siberian Federal University 
- Issue
- Journal of Siberian Federal University. Chemistry. 2011 4 (3)
- Authors
- Kuznetsova, Svetlana A.; Skvortsova, Galina P.; Skurydina, Evgeniya S.; Malyar, Yuriy N.
- Contact information
- Kuznetsova, Svetlana A. : Siberian Federal University Institute of Chemistry and Chemical Technology SB RAS , 79 Svobodny, Krasnoyarsk, 660041 Russia 42 K. Marx st., Krasnoyarsk, 660049 Russia , e-mail: ; Skvortsova, Galina P. : Institute of Chemistry and Chemical Technology SB RAS , 42 K. Marx st., Krasnoyarsk, 660049 Russia; Skurydina, Evgeniya S. : Institute of Chemistry and Chemical Technology SB RAS , 42 K. Marx st., Krasnoyarsk, 660049 Russia; Malyar, Yuriy N. : Institute of Chemistry and Chemical Technology SB RAS , 42 K. Marx st., Krasnoyarsk, 660049 Russia
- Keywords
- birch bark; acylation; propionic acid; betulin dipropionate; activation; overheated steam
- Abstract
It was studied the influence of conditions of outer birch bark acylation by propionic acid and activation of overheated steam on the yield and composition of triterpene derived products. It was established that depending on the acylation conditions could be obtained the extracts with different contents of betulin dipropionate, betulin monopropionate, betulin and lupeol. It was shown that the extracts with the highest contents of betulin dipropionate 85-91 % was obtained from the initial birch bark the fraction of 2-5 mm and pre-activated birch bark the fraction of 10-20 mm. The structure of betulin dipropionate was confirmed by elemental analysis, FTIR spectroscopy, PMR and C13 NMR.
- Pages
- 248-256
- Paper at repository of SibFU
- https://elib.sfu-kras.ru/handle/2311/2594
Journal of Siberian Federal University. Chemistry / Influence of Conditions of Outer Birch Bark Acylation and Activation on the Yield and Composition of Extracts
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