A 13C and 1H NMR analysis of perfumes

Талзи, В. П.

doi:10.1134/s107042720601023x

Cited by 18 publications

(13 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This extract was purified by chromatography and the following allelochemicals were characterized: five sesquiterpenes ( 1 – 5 ), one fatty acid ( 6 ), two flavonoids ( 7 and 8 ), one phenylethanoid glucoside ( 9 ), two aromatic esters ( 10 and 11 ), and two sugars ( 12 and 13 ). The isolated compounds were identified by comparison of their spectroscopic data ( 1 H‐NMR, 13 C‐NMR, IR, and MS) with those reported in the literature for 1 β ,6 α ‐dihydroxy‐eudesm‐4(5)‐ene ( 1 ) ; 1 β ‐hydroxyeudesma‐5,11‐diene ( 2 ) ; T‐cadinol ( 3 ) ; loliolide ( 4 ) ; spathulenol ( 5 ) ; dimorphecolic acid ( 6 ) ; afzelin ( 7 ) ; kaempferol‐4′‐ O ‐rhamnopyranoside ( 8 ) ; benzyl salicylate ( 10 ); benzyl benzoate ( 11 ) ; both anomers of d ‐xylopyranose ( Fig. ).…”

Section: Resultsmentioning

confidence: 99%

Evaluation of the Allelopathic Potential of Leaf, Stem, and Root Extracts of Ocotea pulchella Nees et Mart

Candido

Varela

Torres

et al. 2016

Chemistry & Biodiversity

View full text Add to dashboard Cite

Despite the increase in recent decades in herbicide research on the potential of native plants, current knowledge is considered to be low. Very few studies have been carried out on the chemical profile or the biological activity of the Brazilian savanna (Cerrado) species. In the study reported here, the allelopathic activity of AcOEt and MeOH extracts of leaves, stems, and roots from Ocotea pulchella Nees was evaluated. The extracts were assayed on etiolated wheat coleoptiles. The AcOEt leaf extract was the most active and this was tested on standard target species (STS). Lycopersicon esculentum and Lactuca sativa were the most sensitive species in this test. A total of eleven compounds have been isolated and characterized. Compounds 1, 2, 4, and 6 have not been identified previously from O. pulchella and ocoteol (9) is reported for the first time in the literature. Eight compounds were tested on wheat coleoptile growth, and spathulenol, benzyl salicylate, and benzyl benzoate showed the highest activities. These compounds showed inhibitory activity on L. esculentum. The values obtained correspond to the activity exhibited by the extract and these compounds may therefore be responsible for the allelopathic activity shown by O. pulchella.

show abstract

Section: Resultsmentioning

confidence: 99%

Evaluation of the Allelopathic Potential of Leaf, Stem, and Root Extracts of Ocotea pulchella Nees et Mart

Candido

Varela

Torres

et al. 2016

Chemistry & Biodiversity

View full text Add to dashboard Cite

show abstract

“…Since all benzaldehyde products are well-known and already spectroscopically well-characterized [31,32,33,34,35], a further presentation and discussion of their spectral characteristics has been found superfluous. On the other hand, the 1-arylpropenes formed (as mixtures of geometrically isomeric cis -and trans -forms) by the isomerization of the allylbenzenes appear not to have been well-characterized spectroscopically [36,37], for which reason full details of both the 1 H- NMR spectra (600 MHz) and the 13 C-NMR spectra are presented in the Experimental.…”

Section: Resultsmentioning

confidence: 99%

Fast and Green Microwave-Assisted Conversion of Essential Oil Allylbenzenes into the Corresponding Aldehydes via Alkene Isomerization and Subsequent Potassium Permanganate Promoted Oxidative Alkene Group Cleavage

et al. 2009

View full text Add to dashboard Cite

Essential oil allylbenzenes from have been converted quickly and efficiently into the corresponding benzaldehydes in good yields by a two-step “green” reaction pathway based on a solventless alkene group isomerization by KF/Al2O3 to form the corresponding 1-arylpropene and a subsequent solventless oxidation of the latter to the corresponding benzaldehyde by KMnO4/CuSO4 5H2O. The assistance by microwave irradiation results in very short reaction times (<15 minutes). The green conversion of eugenol (4-allyl-2-methoxyphenol) into vanillin (4-hydroxy-3-methoxybenzaldehyde) has been carried out in a similar way, requiring however two additional microwave-assisted synthetic steps for acetylation of the hydroxy group prior to the oxidation reaction, and for the final deacetylation of vanillin acetate (4-acetoxy-3-methoxybenzaldehyde) by KF/Al2O3 under solvent-free conditions, respectively.

show abstract

“…Combining all the NMR spectra data, the four isolated compounds were finally recognized as citronellol (0.44 g), [17][18][19] γ-terpinene (0.22 g), 17,20 neryl acetate (0.23 g) 17 and β-pinene (0.15 g). 21 …”

Section: Structure Confirmation Of Isolated Compoundsmentioning

confidence: 99%

Chemical constituents and biological activities against Tribolium castaneum (Herbst) of the essential oil from Citrus wilsonii leaves

Chen

Yang

You

et al. 2014

JSCS

View full text Add to dashboard Cite

The essential oil obtained from Citrus wilsonii Tanaka leaves by hydrodistillation was investigated by GC and GC-MS. The main components of the essential oil were identified to be citronellol (16.94 %), neryl acetate (10.35 %), γ-terpinene (9.85 %), citronellal (9.36 %) and β-pinene (6.72 %). These four compounds, predicted with a bioactivity-test to be the active constituents, were isolated and identified. It was found that the essential oil of C. wilsonii leaves and the isolated compounds possessed fumigant and contact toxicity against Tribolium castaneum adults. The essential oil and γ-terpinene showed strong fumigant toxicity against T. castaneum (LC 50 = 8.18 and 4.09 mg L -1 , respectively). The repellency of the crude oil and the active compounds was also determined. Citronellol, neryl acetate and β-pinene were strongly repellent (100, 86 and 92 %, respectively, at 78.63 nL cm -2 , after 2 h treatment) against T. castaneum. The essential oil and citronellol exhibited the same level of repellency compared with the positive control, N, N,. The results indicate that the essential oil of C. wilsonii leaves and its active compounds had the potential to be developed as natural fumigants, insecticides and repellents for the control of T. castaneum.

show abstract

A 13C and 1H NMR analysis of perfumes

Cited by 18 publications

References 2 publications

Evaluation of the Allelopathic Potential of Leaf, Stem, and Root Extracts of Ocotea pulchella Nees et Mart

Evaluation of the Allelopathic Potential of Leaf, Stem, and Root Extracts of Ocotea pulchella Nees et Mart

Fast and Green Microwave-Assisted Conversion of Essential Oil Allylbenzenes into the Corresponding Aldehydes via Alkene Isomerization and Subsequent Potassium Permanganate Promoted Oxidative Alkene Group Cleavage

Chemical constituents and biological activities against Tribolium castaneum (Herbst) of the essential oil from Citrus wilsonii leaves

Contact Info

Product

Resources

About