ЭКСТРАКЦИЯ БЕТУЛИНА АЛИФАТИЧЕСКИМИ СПИРТАМИ C3-C4 ИЗ БЕРЕСТЫ БЕРЕЗЫ, ГИДРОЛИЗОВАННОЙ В ВОДНОМ РАСТВОРЕ ЩЕЛОЧИ

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Левданский, Владимир Александрович ; Левданский, Александр Владимирович (2014)
  • Publisher: Altai State University
  • Journal: Khimiia rastitel'nogo syr'ia (Chemistry of plant raw material) (issn: 1029-5143, eissn: 1029-5151)
  • Related identifiers: doi: 10.14258/jcprm.1401131
  • Subject: береста, щелочной гидролиз, гидроксид натрия, гидроксид калия, экстракция, изопропанол, бутанол, изобутанол, бетулин. | birch bark, alkaline hydrolysis, sodium hydroxide, potassium hydroxide, extraction, isopropanol, butanol, isobutanol, betulin.
    mesheuropmc: complex mixtures

It was established, that after hydrolysis of birch bark in water solution of alkali in the presence of isopropanol, butanol and isobutanol two layers were formed. The top layer contained betulin dissolved in alcohol, and the bottom layer contained a water-soluble alkali and its hydrolysis products of bark. Betulin was isolated by the separation and concentration of the alcohol layer. The structure of betulin was confirmed by methods of IR and NMR spectroscopy.
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