Diterpene acids from Juniperus communis subsp. Hemisphaerica

Feliciano, Arturo San; Caballero, Esther; Rey, Benedicto del; Sancho, Isabel

doi:10.1016/s0031-9422(00)98270-0

Cited by 26 publications

(12 citation statements)

References 3 publications

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“…This result marks a significant difference between J. brevifolia hexane extract and identical extracts from others Juniperus species like J. communis, J. sabina and J. thurifera [37][38][39], which are very rich in pimarane and labdane diterpene type compounds.…”

Section: Resultsmentioning

confidence: 86%

The chemical composition of hexane extract from bark ofJuniperus brevifolia

Seca

Silva

2008

Natural Product Research

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The phytochemical analysis of the bark of Juniperus brevifolia was undertaken for the first time. The GC-MS analysis of the hexane extract from bark of "cedro-do-mato" (J. brevifolia) allowed to identify three rare compounds for the first time in Juniperus genus: 6,7-dehydroferrugin-12-methyl ether, 11-hydroxy-6,7-dehydroferruginol and 6,7-dehydrohinokiol. The results also showed that the chemical composition of the extract were essentially abietane-type diterpenoids with alcohol function (44.9%) and with carbonyl function (8.6%). Fatty acids such palmitic, oleic, stearic and docosanoic acids were the second most abundant family of identified compounds (9.5%) and its value increased (12.7%) after alkaline hydrolysis, mainly due to docosanoic and tetradocosanoic acids. Sterols like sitosterol and stigmast-4-en-3-one, were also present (6.6%), along with esters of sterols (8.4%). Significant quantities of the long-chain aliphatic alcohols (ca 3.7%) were identified in the hexane extract only after alkaline hydrolysis.

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Section: Resultsmentioning

confidence: 86%

The chemical composition of hexane extract from bark ofJuniperus brevifolia

Seca

Silva

2008

Natural Product Research

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“…Few papers have been published on phytochemical studies of J. communis subsp. hemisphaerica (San Feliciano et al, 1991, 1995.…”

Section: Introductionmentioning

confidence: 99%

Antioxidant Activity of the Essential Oils of Different Parts ofJuniperus communis. subsp.hemisphaerica. andJuniperus oblonga.

Emami

Javadi

Hassanzadeh

2007

Pharmaceutical Biology

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The essential oils of different parts of Juniperus communis subsp. hemisphaerica (Presl) Nyman (Cupressaceae) and Juniperus oblonga M. B. were examined for their potential radical scavenging activity. The compositions of the essential oils of these plants were studied qualitatively and quantitatively by GC and GC-MS. The main components of the essential oils as well as positive controls were subjected to antioxidant testing. A rapid evaluation for antioxidants, using two TLC screening methods, showed that all tested oils and their main components have antioxidant activity. The abilities of the volatile oils to act as nonspecific donors for hydrogen atoms for electron were checked in the diphenylpicrylhydrazyl (DPPH) assay. In the DPPH assay, the strongest effect among the essential oils was measured for the oil of leaves of male J. communis subsp. hemisphaerica at a concentration of 4 mL=mL (24.0%) In the deoxyribose degradation assay, the essential oils, pure components, and positive controls were tested at different concentrations. Most of the tested compounds showed some antioxidant effects. The fruit oil of J. oblonga has the strongest effect among the tested volatile oils.The deoxyribose assay was modified in three different ways to assess whether the oils exhibited site-specific effects. The results of the current study, which demonstrate the DPPH scavenging activity of the essential oils of the of leaves of male J. communis subsp. hemisphaerica and the OH radical scavenging effects of the fruit oil of J. oblong suggest the use of these two essential oils in very low concentrations for preserving food materials.

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“….5 (C-5), 24.1 (C-6), 37.9 (C-7), 148.3 (C-8), 56.6 (C-9), 39.6 (C-10), 24.5 (C-11), 159.9 (C-12), 138.2 (C-13), 129.1 (C-14), 103.9 (C-15), 27.9 (C-16), 103.6 (C-17), 21.7 (C-18), 14.4 (C-19), 54.3 (C-20). Based on the spectral data, compound 3 was identified as communic acid (3) (Feliciano, Caballero, Rey, & Sancho, 1991 .3 (C-2), 42.1 (C-3), 33.6 (C-4), 55.5 (C-5), 24.1 (C-6), 37.9 (C-7), 148.3 (C-8), 56.6 (C-9), 39.6 (C-10), 24.5 (C-11), 125.2 (C-12), 137.2 (C-13), 29.1 (C-14), 179.5 (C-15), 197.2 (C-16), 108.2 (C-17), 21.7 (C-18), 14.4 (C-19), 54.3 (C-20). Based on the spectral data, compound 4 was identified as copallic acid (Tsichritzis & Jakupovic, 1990).…”

Section: Generalmentioning

confidence: 99%