Chemical composition variability of the essential oil of <i>Conyza canadensis</i> Cronq.

Lis, Anna; Piggott, John; Góra, J.

doi:10.1002/ffj.1177

Cited by 17 publications

(8 citation statements)

References 3 publications

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“…This was not unexpected, because the composition of C. canadensis essential oil can vary according to the collection site and the growth phase of the plant. 17,18 The chloroform fraction, with fewer concomitant compounds, was submitted to preparative flash chromatography in order to isolate the analytes of interest. The NMR spectra of the isolated compounds 1 and 2 agreed with published data, except for the C-8 and C-9 carbons of compound 1.…”

Section: Resultsmentioning

confidence: 99%

Conyza canadensis: Green Extraction Method of Bioactive Compounds and Evaluation of Their Antifungal Activity

Porto¹,

Rath²,

Queiroz³

2016

J. Braz. Chem. Soc.

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Synthetic fungicides are a common treatment for post-harvest diseases in fruits, although demand is increasing for alternatives such as biopesticides. The aim of this work was to investigate the presence of naturally occurring antifungal compounds in Brazilian specimens of the weed Conyza canadensis. Two compounds [(4Z)-lachnophyllum lactone and (4Z,8Z)-matricaria lactone] were isolated and their antifungal activities were evaluated against eight postharvest disease fungi. Aspergillus niger, Cladosporium sp., and Penicillium digitatum proved susceptible to the treatment (minimum inhibitory concentrations varying from 32 to 64 µg mL -1 ). These fungi are common postharvest pathogens of fruits and vegetables, causing rots and secreting mycotoxins. A green and sustainable extraction method employing pressurized hot water was developed and optimized (100 °C, 4 × 1 min cycles). Yields of 1.46 and 0.24 mg g -1 were obtained for (4Z)-lachnophyllum lactone and (4Z,8Z)-matricaria lactone, respectively. The extract could be applied directly to fruits and vegetables in postharvest treatments.

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Section: Resultsmentioning

confidence: 99%

Conyza canadensis: Green Extraction Method of Bioactive Compounds and Evaluation of Their Antifungal Activity

Porto¹,

Rath²,

Queiroz³

2016

J. Braz. Chem. Soc.

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“…Thus, Barbosa and coworkers (2005) found that C. bonarensis contains matricaria methyl ether and manool, along with limonene and carvone as the main volatiles metabolites. Hrutfiord et al (1988) and Lis et al (2002) described the presence of trans-a-bergamotene, cis-a-bergamotene, (Z)-b-farnesene and R-(þ)-limonene, together with b-pinene and myrcene for C. canadensis. Finally, Ndiege et al (2005) identified five major components including limonene, 2-methyl-5-(methylethyl)-2-cyclohexen-1-ol, 1,8-cineol, perillaldehyde and perillalcohol in the oil of C. newii.…”

Section: Discussionmentioning

confidence: 99%

Quality control tests for the crude drug ofConyza filaginoides

Ovalle-Magallanes

Rivero‐Cruz

Mata

2013

Pharmaceutical Biology

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Context: Conyza filaginoides (D.C.) Hieron (Asteraceae) is a medicinal Mexican plant highly prized in contemporary Mexico for the treatment of upset stomach and diabetes. Objective: This work was undertaken to develop a suitable high performance liquid chromatography (HPLC)-diode array detection (DAD) method for quantifying rutin (1), the main active principle from the aerial parts of C. filaginoides. Materials and methods: The method was performed using a LiChrospher 100 RP-18 column. The mobile phase was water (containing 0.1% phosphoric acid)-methanol-acetonitrile (80:5:15, v/v) at a flow rate of 1.2 mL min À1. Results: Limits of detection and quantification were 7.5 and 22.8 mg mL À1, respectively. The main recoveries measured at three concentrations were higher than 98%, with RSD 52%. Quantitative analysis of a few samples showed the presence of high concentrations of 1 (3.6 AE 0.2 g/100 g of dry plant material). The volatile components were extracted by hydrodistillation or head space solid-phase microextraction (HS-SPME), and thereafter analyzed by gas chromatography coupled to mass spectrometry (GC-MS). Forty-three chemical constituents representing 90% of the total content of the oil were identified. The major light volatile compounds obtained by HS-SPME revealed a high content of monoterpene hydrocarbons.Conclusions: A precise, reliable, and accurate analytical HPLC method to detect and quantify 1 in the crude drug and some preparations were developed and fully validated. The volatile components of the plant are described for the first time. The proposed method would be useful for quality control assurance of this important Mexican plant.

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“…The layers were separated and the water layer was extracted with hexane (3 × 20 ml). The collected organic layers were washed with water and dried over MgSO 4 . After decantation from the drying agent, the solvent was evaporated in a rotary evaporator.…”

Section: Synthesis Of Isomeric C 14 2-alkylalkanalsmentioning

confidence: 99%

“…3,4 Octanal has been found in lavender essential oil; 1 nonanal in small concentrations (0.02%) in essential oils obtained from rose, root of iris and the plant Solidago virgaurea; 1,5 decanal in nerol; 6 undecanal in the essential oil of Citrus spp. and of the plant Fortunella marginata; 6 dodecanal in the essential oil of pine needles and of the plants Chamaecyparis lawsonia and Anthemis altissima L. 1,6,7 The presence of tetradecanal has also been noted in the essential oil of Salvia nemorosa.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and olfactory properties of 2‐alkylalkanals, analogues of 2‐methylundecanal

Gibka

Gliński

2006

Flavour & Fragrance J

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A series of 2-alkylalkanals containing 14 carbon atoms was obtained in a two-step synthesis starting from tridecan-x-ones, (x = 2 -6) in the Darzens reaction. In the first step, 1-carbomethoxy-2,2-dialkyl oxiranes (glycidyl esters) were synthesized with moderate yields (27-49%) in the reaction between ketone and methyl chloroacetate in the presence of sodium t-butoxide. The esters derived from tridecan-2-one and tridecan-3-one have pleasant, fruity wild-strawberry odours, while the others are almost odourless. In the second step, the hydrolysis of the obtained esters was performed and their subsequent decarboxylation led to the formation of 2-alkylalkanals with good or moderate yields (65-39%). The odour characteristics of these aldehydes are quite similar to that of 2-methylundecanal (MNA).

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Chemical composition variability of the essential oil of Conyza canadensis Cronq.

Cited by 17 publications

References 3 publications

Conyza canadensis: Green Extraction Method of Bioactive Compounds and Evaluation of Their Antifungal Activity

Conyza canadensis: Green Extraction Method of Bioactive Compounds and Evaluation of Their Antifungal Activity

Quality control tests for the crude drug ofConyza filaginoides

Synthesis and olfactory properties of 2‐alkylalkanals, analogues of 2‐methylundecanal

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