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THE SIBERIAN AND EUROPEAN LARCH POLAR ALCOHOLS OF NEUTRAL SUBSTANCES OF WOODY GREENS

Authors: Daria Sergeevna Mikson; Viktor Ivanovich Roshchin;

THE SIBERIAN AND EUROPEAN LARCH POLAR ALCOHOLS OF NEUTRAL SUBSTANCES OF WOODY GREENS

Abstract

The composition of extractive substances extracted by petroleum ether from the woody greens of Siberian larch (Larix sibirica Ldb.) and European (Larix decidua Mill.) is presented. The woody greens of Siberian larch contain 2 times more resins (9.5%, here and further % from dry raw materials), than the woody greenery of European larch (5.2%). The alcohol fraction from Larix sibirica made up one quarter of neutral substances (25.6%), which is 2 times higher than in Larix decidua (12.85%). The fraction of diols (30.0% of the amount of alcohols) prevailed in Larix decidua, which is 3.3 times higher than in Larix sibirica. The composition of alcohols of neutral substances is different in two types of larch. Monoterpene alcohols prevailed in Larix decidua (7.0%, hereafter % of the alcohol fraction), the main components – borneol and α-terpineol. The ratio of sesquiterpene components is almost the same in both studied species of larch. In woody greens Larix sibirica major sesquiterpenoids are T-murolol and δ-cadinol, and in Larix decidua – T-cadinol, T-murolol and δ-cadinol. The main fraction of alcohols of neutral substances consisted of diterpenoids (54.3–72.0%). Aromatic diterpene alcohol – dehydroabietinol (23.5%) prevailed in the woody greens of Larix decidua, and in the woody greens of Larix sibirica its oxidized form in the form of methyl ether – 15-hydroxymethyl dehydroabietate (23.1%). Labdanoid 13-epimanool was isolated from woody greens of Larix sibirica (8.0%). Acyclic alcohol phytol was contained in both studied samples of woody greens with 2-fold dominance in Larix decidua. Tricyclic terpenoids levopimarinol and palustrol have been identified only in the woody greens of Larix decidua. The composition of alcohols identified nor-diterpenoids – 18-norisopimarinol and 18-nordehydroabietinol with the predominance of the latter in Larix sibirica. Epitorulosol and its acetate were isolated from the woody greens of Larix sibirica, and larixol was isolated from the woody greens of Larix decidua. The structures of the isolated compounds were confirmed by NMR-spectroscopy.

Keywords

лариксол, larixol, Larix sibirica Ldb., epitorulosol, древесная зелень, extractives, экстрактивные вещества, Larix decidua Mill., woody green, спирты, alcohols, эпиторулозол

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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