Scopoletin and Hispidulin in Baccharis magellanica

Cordano, Gianni F.; Peña, Amalia Muñoz de la; Medina, Jorge J.

doi:10.1021/np50023a029

Cited by 6 publications

(3 citation statements)

References 2 publications

(2 reference statements)

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“…In the semiarid zones from Atacama to the Patagonia region of Austral Southerm Chile grow B. linnearis, B. magellanica, and B. umbelliformis (tribe, Eupatorieae; family, Asteraceae). B. linnearis is a dominant shrub that can be found growing either in communities as with associated flora or in solitary form throughout central to south-central regions (3); B. magellanica and B. umbelliformis grow in semiarid regions of Austral Southern Chile (5)(6)(7). These plants exhibit strong effects of survival under different stress environmental conditions (8).…”

Section: Introductionmentioning

confidence: 99%

“…Here, we report the plant growth inhibitory effects of p-hydroxyacetophenone (1), p-O-glycoside acetophenone (2), p-bromo-acetophenone (3), p-methoxy-acetophenone (4), 4′acetyl-acetophenone (5), acetophenone (6), tremetone (7), 10, 11-epoxy-tremetone (8), 10,11-dihydrotremetone (9), 4′-hydroxytremetone (10), 4′-acetyl-tremetone (11), 10,11-epoxy-4′-hydroxytremetone (12), and MeOH and CH 2 Cl 2 extracts on germination and other physiological activities (shoot-root elongation, seed respiration, O 2 uptake, H + uptake, and redox inhibition in chloroplasts and mitochondria). Dicots assayed were lettuce (Lactuca satiVa cv.…”

Section: Introductionmentioning

confidence: 99%

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Plant Growth Inhibitory Activity of p-Hydroxyacetophenones and Tremetones from Chilean Endemic Baccharis Species and Some Analogous: A Comparative Study

Céspedes

Uchoa

Salazar

et al. 2002

J. Agric. Food Chem.

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Plant growth inhibitory effects of acetophenones 1-6, tremetones 7-12, and MeOH and CH(2)Cl(2) extracts from the aerial parts of Baccharis linnearis, Baccharis magellanica, and Baccharis umbelliformis collected in Chile were assayed as growth inhibitory activity in ranges of 10-500 microM and 0.1-150 ppm, respectively. The effects on seedling growth, germination, and respiration of ryegrass, lettuce, green tomato, and red clover weedy target species were measured. In addition to the inhibitory activity on bleaching of crocin induced by alkoxyl radicals, these compounds also demonstrated scavenging properties toward 2,2-diphenyl-1-picrylhydrazyl in thin-layer chromatography autographic and spectrophotometric assays. In addition, acetophenones and tremetones also showed inhibition of H(+) uptake and oxygen uptake respiration in isolated chloroplasts and mitochondria, respectively. Our results indicate that 1, 4, 7-12, and CH(2)Cl(2) extracts interfere with the dicot preemergence properties, mainly energy metabolism of the seeds at the level of respiration. These compounds appear to have selective effects on the radicle more than shoot growth of dicot seeds. Also, the levels of radicle inhibition obtained with some compounds on Physalis ixocarpa and Trifolium pratense are totally comparable to those of ovatifolin, a known natural growth inhibitor. This behavior might be responsible for its plant growth inhibitory properties and its possible role as an allelopathic agent.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Plant Growth Inhibitory Activity of p-Hydroxyacetophenones and Tremetones from Chilean Endemic Baccharis Species and Some Analogous: A Comparative Study

Céspedes

Uchoa

Salazar

et al. 2002

J. Agric. Food Chem.

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“…), along with coumarins such as isoscopoletin (1b), scoparone (1c), and herniarin (1d), which showed antibacterial and fungicide activities [6] [21]. Coumarins 1a -1c were also extracted from many plants [22], or from the fruit of Solanum dasyphyllum [23], exhibiting anticonvulsant action in a murine model [24]. Ayapin (1e) and citropten (1f) are two coumarins isolated from diverse natural sources, with potential antileukemia activity [25].…”

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confidence: 99%

New Approach for the Construction of the Coumarin Frame and Application in the Total Synthesis of Natural Products

Jerezano

Jiménez

Cruz

et al. 2011

Helvetica Chimica Acta

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A new synthetic approach is described for building the coumarin scaffold through the Lewis acid‐promoted cyclization of novel aryl 3‐(dimethylamino)prop‐2‐enoates 2a–2f. The latter precursors were prepared via aminomethylenation of the corresponding aryl acetates 4a–4f with the Bredereck reagent. This approach was used for the synthesis of biologically active natural compounds 1a–1f, through a three‐step procedure starting from the corresponding phenols.

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Flavones and flavonols

Wollenweber¹,

Jay²

1988

The Flavonoids

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Scopoletin and Hispidulin in Baccharis magellanica

Cited by 6 publications

References 2 publications

Plant Growth Inhibitory Activity of p-Hydroxyacetophenones and Tremetones from Chilean Endemic Baccharis Species and Some Analogous: A Comparative Study

Plant Growth Inhibitory Activity of p-Hydroxyacetophenones and Tremetones from Chilean Endemic Baccharis Species and Some Analogous: A Comparative Study

New Approach for the Construction of the Coumarin Frame and Application in the Total Synthesis of Natural Products

Flavones and flavonols

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