Browsing by Author "Śmist, Małgorzata"

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    Comparison of extraction methods for the determination of essential oil content and composition of lavender leaves
    (Видавництво Львівської політехніки, 2013) Adaszyńska-Skwirzyńska, Michalina; Śmist, Małgorzata; Swarcewicz, Maria
    In this paper, comparison of the volatile components composition in the samples obtained by hydrodistillation of Lavandula angustifolia leaves is described. The comparison of the lavender essential oil obtained by hydrodistillation in the Deryng and Clevenger type apparatus, according to the pharmacopoeial methods (FP VI and VII), showed the presence of the same terpenoids in both essential oils, however, the relative percentage composition of the components were different. The oils contain 37 identified compounds, of which the main are: borneol and caryophyllene oxide. Most of the compounds identified in the oils belong to monoterpenoids group (61.9-71.09%). The essential oils yields, measured after distillation according to Polish Pharmacopoeia VI (Deryng apparatus, 3 h) and VII (Clevenger type apparatus, 2 h), were the same and amounted to 0.45% v/w.
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    Synthesis of aryl-fused 1,4-oxazines and 1,4-oxazepines
    (Видавництво Львівської політехніки, 2011) Śmist, Małgorzata; Kwiecień, Halina
    Simple routes for the synthesis of 1,4-benzoxazin-3-ones, 1,4-naphthoxazin-3-ones and 1,4-naphthoxazepin-3-ones are described herein. 1,4-Naphthoxazepin-3-ones were prepared by reductive amination of appropriate formyl esters. This synthesis proceeded via azines which underwent reduction with the use of aluminum amalgam and subsequent ring closure. On the other hand, derivatives of aryl-fused 1,4-oxazines were obtained from corresponding nitro esters by catalytic reduction with hydrogen and simultaneous intramolecular cyclization of amine intermediate.