Results 61 to 70 of about 18,013 (253)

Pressurized Liquid Extraction of Coumarins from Fruits of Heracleum leskowii with Application of Solvents with Different Polarity under Increasing Temperature

Molecules, 2012
Coumarins are nowadays an important group of organic compounds from natural sources that are useful in a number of fields. Because they possess different pharmacological properties, finding the proper extraction conditions for their separation from plant
Krystyna Skalicka-Woźniak, Kazimierz Głowniak   +1 more
doaj   +1 more source

NATURAL COVALENTLY COMBINED DERIVATIVES OF 2H-1-BENZOPYRAN-2-ONE

Разработка и регистрация лекарственных средств, 2019
Coumarins, known as 2Н-1-benzopyran-2-one (or 2H-chromen-2-one), are present in remarkable amounts in plants, also have been detected in microorganisms and animal sources.
A. Z. Abyshev, C. B. Nguyen
doaj  

Allelochemical Activity of Eugenol-Derived Coumarins on Lactuca sativa L.

Plants, 2020
Coumarins are widely distributed substances in plant species that promote phytotoxic effects, allowing them to be exploited as herbicides less harmful to the environment, since many invasive species have demonstrated resistance to commercially available ...
Kamilla Pacheco Govêa, Rafaella Sueko Tomita Pereira, Mateus Donizetti Oliveira de Assis, Pâmela Ingrid Alves, Guilherme Andrade Brancaglion, André Eidi Toyota, José Vaz Cardoso Machado, Diogo Teixeira Carvalho, Thiago Corrêa de Souza, Luiz Alberto Beijo, Luciene de Oliveira Ribeiro Trindade, Sandro Barbosa   +11 more
doaj   +1 more source

Opium trade and use during the Late Bronze Age: Organic residue analysis of ceramic vessels from the burials of Tel Yehud, Israel

Archaeometry, EarlyView., 2022
Abstract Organic residue analysis was conducted on various vessels from burials at Tel Yehud, Israel. The analyses led to new reliable evidence for the presence of opioid alkaloids and their decomposition products. This research revitalizes a decades‐old discussion on the presence and function of the opium trade across a cultural region of utmost ...
Vanessa Linares, Eriola Jakoel, Ron Be’eri, Oded Lipschits, Ronny Neumann, Yuval Gadot   +5 more
wiley   +1 more source

Anticancer potential of coumarins from the Ferulago genus

Results in Chemistry
Cancer treatment needs better therapeutic agents with fewer side effects compared to the present anticancer and antitumor drugs. Possessing a wide range of chemicals, natural products are considered rich sources of bioactive compounds in treating a broad
Mansour Mofasseri, Elham Eini, Saber Mofasseri, Bahram Hanifehpour, Fatemeh Zanbili, Ahmad Poursattar Marjani   +5 more
doaj   +1 more source

Elucidation of the biosynthesis pathway and heterologous construction of a sustainable route for producing umbelliferone

Journal of Biological Engineering, 2019
Background Coumarins play roles in many biological processes. Angelica decursiva is one of the major sources of coumarins in China. Due to increasing demand for coumarins in the marketplace, traditional extraction from plants is now considered ...
Yucheng Zhao, Xiangyun Jian, Jialin Wu, Wanchun Huang, Chuanlong Huang, Jun Luo, Lingyi Kong   +6 more
doaj   +1 more source

Photosensitizing Au(I) Catalysis With Coumarins

Chemistry – A European Journal, EarlyView.
A Au(I) complex with a tethered coumarin fragment was synthesized and characterized by UV‐vis and emission spectroscopy. Its ability to facilitate photo‐driven cross‐coupling reactions through single‐electron and energy transfer events was evaluated. ABSTRACT Gold catalysis shows versatility in a wide range of challenging transformations, wherein light‐
Liliana Capulín Flores, Jacob J. van der Wal, Johannes E. M. N. Klein   +2 more
wiley   +1 more source

Coumarins in traditional medicine: Bridging ancient wisdom and scientific progress

Phytomedicine Plus
Coumarins are a diverse group of naturally occurring compounds long recognized in traditional medicine for their broad therapeutic potential. This narrative review explores their journey from ancient healing traditions—such as Ayurveda, Traditional ...
Yasser Fakri Mustafa
doaj   +1 more source

Fluorogenic Sydnones for Bioorthogonal Labeling of DNA

Chemistry – A European Journal, EarlyView.
Conjugates of sydnones with cyanine‐styryl dyes combine bioorthogonal reactivity with fluorogenicity. The reactivity with bicyclo[6.1.0]non‐4‐yne (BCN)‐modified DNA showed second‐order rate constants of up to k2 = 2,300 M−1s−1 and fluorescence turn‐on by one magnitude of order.
Kerstin Müller, Hans‐Achim Wagenknecht   +1 more
wiley   +1 more source

Synthetic Strategies for the Construction of Cyclobutane‐Fused Heterocycles

European Journal of Organic Chemistry, EarlyView.
Cyclobutane‐fused heterocycles are important motifs commonly present in bioactive compounds, recognized for their rigid 3D structures that confer unique properties. However, synthesizing these compounds remains challenging. This review discusses current methods for their synthesis, such as photochemical, metal‐catalyzed, and Lewis acid‐mediated [2 + 2]
Michela Vargiu, Mauro Uras, Angelo Frongia   +2 more
wiley   +1 more source