Results 111 to 120 of about 95,231 (345)

Structural characterization of phytotoxic terpenoids from Cestrum parqui. [PDF]

, 2005
Isolation, chemical characterization and phytotoxicity of nine polyhydroxylated terpenes (five C13 nor-isoprenoids, two sesquiterpenes, a spirostane and a pseudosapogenin) from Cestrum parqui LHerr are reported.
D'Abrosca, B, DellaGreca, M, Fiorentino, A, Monaco, P, Natale, A, Oriano, P, Zarrelli, A   +6 more
core   +1 more source

Plant sesquiterpene lactones

Philosophical Transactions of the Royal Society B: Biological Sciences
Sesquiterpene lactones (STLs) are a prominent group of plant secondary metabolites predominantly found in the Asteraceae family and have multiple ecological roles and medicinal applications. This review describes the evolutionary and ecological significance of STLs, highlighting their roles in plant defence mechanisms against herbivory and as ...
Olivia Agatha, Daniela Mutwil-Anderwald, Jhing Yein Tan, Marek Mutwil   +3 more
openaire   +3 more sources

Synthesis of Crosslinked Biopolyesters Catalyzed by Natural Amino Acids

Asian Journal of Organic Chemistry, EarlyView.
Highly crosslinked bio‐polyesters were synthesized via the ROCOP reaction between epoxidized sunflower oil and biobased cyclic anhydrides. The resulting materials were comprehensively characterized by FT‐IR, TGA, and DSC. A cross‐linked network in the bio‐based polymers has been confirmed by dynamic mechanical analysis.
Enrique Francés‐Poveda, Abigail Montiel, Oscar A. Douglas‐Gallardo, Carmen Moya‐López, Genesys L. Mahecha, Mario E. Flores, Felipe de la Cruz‐Martínez, Francisca Werlinger, Javier Martínez, Agustín Lara‐Sánchez   +9 more
wiley   +1 more source

Exo‐Selective Intramolecular (4+3) Cycloadditions to Trans‐Fused Perhydroazulenes: An Asymmetric Formal Synthesis of (−)‐Pseudolaric Acid B

Angewandte Chemie, EarlyView.
We present an asymmetric formal synthesis of pseudolaric acid B, for which we developed a new family of substrates with an epoxide geminally tethered to a sidechain bearing a furan, which undergoes a TESOTf‐catalyzed intramolecular (4+3) cycloaddition to yield the trans‐fused perhydroazulene core and the requisite quaternary stereocenter of the natural
Zengsheng Yin, Yuxuan He, Guo Wei, Yuchen Zhou, Antonio Rizzo, Yun He, Elizabeth H. Krenske, Pauline Chiu   +7 more
wiley   +2 more sources

7-epi-griffonilide, a new lactone from Bauhinia pentandra: complete 1H and 13C chemical shift assignments

Anais da Academia Brasileira de Ciências
A new lactone, 7-epi-griffonilide (1), and six known compounds, 2, 3a - 3c, 4a and 4b, were isolated from the leaves of Bauhinia pentandra (Fabaceae). The structures elucidation of 1 and 2 were based on detailed 2D NMR techniques and spectral comparison ...
MACIA C.S. DE ALMEIDA, LUCIANA G.S. SOUZA, DANIELE A. FERREIRA, FRANCISCO C.L. PINTO, DÉBORA R. DE OLIVEIRA, GILVANDETE M.P. SANTIAGO, FRANCISCO J.Q. MONTE, RAIMUNDO BRAZ-FILHO, TELMA L.G. DE LEMOS   +8 more
doaj   +1 more source

Changes in the Chemical Composition of Plum Distillate During Maturation with Oak Chips under Different Conditions

Food Technology and Biotechnology, 2017
This study investigates the effect of ageing on the qualitative and quantitative composition of plum distillate in contact with oak wood chips. Maturation was performed with lightly toasted French oak (Quercus sessiflora and Quercus robur) chips or oak ...
Maria Balcerek, Katarzyna Pielech-Przybylska, Urszula Dziekońska-Kubczak, Piotr Patelski, Ewelina Strąk   +4 more
doaj   +1 more source

The Synthesis of Cyclopropyl‐Fused Tetrahydrofurans from Vinylcyclopropanes

Asian Journal of Organic Chemistry, EarlyView.
Vinylcyclopropanes undergo iodocyclization to afford a series of oxabicyclo[3.1.0]hexanols. These substrates were shown to be useful intermediates for the construction of various cyclopropyl‐fused polycycles. Abstract The rapid synthesis of oxabicyclo[3.1.0]hexanols from various vinylcyclopropanes is described.
Alexander J. Craig, Andrew P. Cording, Selena C. L. Gilmer, Jackson S. Henneveld, Sinan Gai, Owain H. Harker, Nigel T. Lucas, Bill C. Hawkins   +7 more
wiley   +1 more source

Algicidal lactones from the marine Roseobacter clade bacterium Ruegeria pomeroyi

Beilstein Journal of Organic Chemistry, 2012
Volatiles released by the marine Roseobacter clade bacterium Rugeria pomeroyi were collected by use of a closed-loop stripping headspace apparatus (CLSA) and analysed by GC–MS.
Ramona Riclea, Julia Gleitzmann, Hilke Bruns, Corina Junker, Barbara Schulz, Jeroen S. Dickschat   +5 more
doaj   +1 more source

A hepatoprotective experiment on taro vegetable (Colocasia esculenta (L.) Schott) flower employing animal models by mitigating oxidative stress

Animal Models and Experimental Medicine, EarlyView.
The antioxidant efficacy of Colocasia esculenta flower’s methanolic extract was assessed using 2,2′‐azino‐bis‐(3‐ethylbenzothiazoline‐6‐sulfonic) (ABTS) and 2,2‐diphenyl‐1‐picrylhydrazyl (DPPH) scavenging assay. The hepatoprotective effect was investigated by assessing liver injury indicators (amino transferase [ALT], aspartate amino transferase [AST],
Mahathir Mohammad, Fahmida Tasnim Richi, Rabiul Hossain, Md. Arafat, Pair Ahmed Jiko, Nazim Uddin Emon, Sayed Al Hossain Rabbi, Tirtha Khastagir, Md. Hemayet Hossain, Safaet Alam   +9 more
wiley   +1 more source

Deciphering Tryptophan Oxygenation: Key Modulators of 2‐Oxindole Formation in MarE

Angewandte Chemie, EarlyView.
This study reveals that MarE, a heme‐dependent aromatic oxygenase, favors dioxygenation of β‐methyl‐l‐tryptophan in the absence of ascorbate and demonstrates how structural and redox tuning shifts its reactivity toward selective monooxygenation, yielding a 2‐oxindole scaffold. These findings offer new insights into enzyme‐controlled indole oxidation in
Romie C. Nguyen, Inchul Shin, Aimin Liu
wiley   +2 more sources