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Croatica Chemica Acta, Vol. 73 No. 2, 2000.

Original scientific paper

Essential Oil and Glycosidically Bound Volatile Compounds from the Needles of Common Juniper (Juniperus communis L.)

Josip Mastelić ; Department of Organic Chemistry, Faculty of Chemical Technology, Teslina 10/5, 21000 Split, Croatia
Mladen Miloš ; Department of Organic Chemistry, Faculty of Chemical Technology, Teslina 10/5, 21000 Split, Croatia
Danica Kuštrak ; Faculty of Pharmacy and Biochemistry, A. Kovačića 1, 10000 Zagreb, Croatia
Ani Radonić ; Department of Organic Chemistry, Faculty of Chemical Technology, Teslina 10/5, 21000 Split, Croatia

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Abstract

The essential oil was isolated by hydrodistillation and glycosides were extracted with ethyl acetate from the needles of common juniper. The obtained essential oil was fractionated on microcolumn with solvents of different polarity. Ali fractions were analysed by gas chromatography-mass spectrometry (GC-MS) on two columns with different polarity of the stationary phases. Sixty-three compounds were identified. The main components of juniper needle oil were: α-pinene (16.9%), sabinene (12.1%), terpinene-4-ol (7.7%), β-phellandrene (7.3%), widdrene (6.4%), γ-terpinene (5.9%), β-terpinene (4.3%), α-terpinene (3.8%), and other compounds in smaller quantities.
After isolation, final purification of the glycosides and enzymatic hydrolysis, the liberated aglycones were analysed in the same way as fractions of the essential oil. Twenty-two aglycones were identified.
The main aglycones were: 3-phenyl-2-propen-1-ol, (32.8%), 2-phenylpropanol (6.0%), thymoquinone (4.6%), 3,4,5-trimethoxybenzaldehyde (4.3%), 3-methyl-2-buten-1-ol (2.8%), 2-phenylethanol (2.8%), 3-phenyl-2-propenal, (2.7%), methyl-3-hydroxybenzoate (2.6%), and p-cymen-8-ol, o-methoxybenzyl alcohol, methyl salycilate, α-methyl-benzyl alcohol, 1-octen-3-ol, and other compounds.

Keywords

Juniperus communis L.; needle essential oil; fractionation of essential oil; GC-MS analysis; glycosidically bound volatiles

Hrčak ID:

132073

URI

https://hrcak.srce.hr/132073

Publication date:

5.6.2000.

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