Results 71 to 80 of about 2,334 (173)

Štetnici artičoke (Cynara scolymus L.) na području Mediterana

open access: yesGlasnik Zaštite Bilja, 2023
Artičoka (Cynara scolymus L.) je višegodišnja biljna vrsta koja zahvaljujući svojim prehrambenim ali i zdravstvenim značajkama postaje sve raširenija kultura na području primorske hrvatske i otoka. Tijekom svog razvoja artičoka je podložna napadu brojnih
Kristijan Franin   +2 more
doaj  

The Expanding Role of Diazirines in Synthetic Methodology

open access: yesEuropean Journal of Organic Chemistry, EarlyView.
Beyond their established role in photoaffinity labeling, diazirines have emerged as versatile reagents in synthetic chemistry. This review highlights their dual reactivity as carbene and nitrogen‐transfer precursors, showcasing mechanistic insights and diverse applications in cyclopropanations, cycloadditions, skeletal editing, amination, heterocycle ...
Viktor Savic   +3 more
wiley   +1 more source

Mulgravanols A and B, rare oxidized xanthenes and a new phloroglucinol isolated from the Australian rainforest plant Waterhousea mulgraveana (Myrtaceae)

open access: yes, 2020
Phytochemical investigation of the Australian rainforest plant leaves Waterhousia mulgraveana, yielded two rare oxidized xanthenes, mulgravanols A (1) and B (2) along with a new phloroglucinol, mulgravanol C (3).
Raju, Ritesh (R17740)   +4 more
core   +1 more source

Tannic Acid an Efficient Catalyst for the Synthesis of 12-aryl-8,9,10,12-tetrahydrobenzo[a]xanthen-11-one Derivatives

open access: yesOrbital: The Electronic Journal of Chemistry, 2015
Tannic acid explore a highly efficient catalytic activity for the synthesis of 12-aryl-8,9,10,12-tetrahydrobenzo[a]xanthen-11-one derivatives in excellent yields via cyclocondensation of aromatic aldehyde, β-naphthol and dimedone.
Deepak S. Kawade   +3 more
doaj   +3 more sources

Design of a New Nano Hinge Molecular Machine Based on Nitrogen Inversion: Computational Investigation [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2016
Ab initio calculations were employed to investigate nitrogen inversion as a configuration change that can supply an infinitely useful switchable control mechanism for some complex systems.
Sara Soleimani Gorgani   +1 more
doaj  

Photosensitization of Colloidal SnO2 Semiconductor Nanoparticles with Xanthene Dyes

open access: yesJournal of Chemistry, 2013
The photochemical behavior of xanthene dyes (fluorescein, erythrosine, and eosin) with colloidal SnO2 nanoparticles was probed by UV-visible, steady state, and time resolved fluorescence measurements. The prepared SnO2 nanoparticles were characterized by
N. Nagarajan   +3 more
doaj   +1 more source

Synthesis of Cysteine–Fluorophore Conjugates by Visible‐Light‐Promoted Thiol–Ene Coupling Using Organic Photocatalysts

open access: yesEuropean Journal of Organic Chemistry, EarlyView.
Cysteine–fluorophore conjugates were efficiently prepared through a visible‐light‐driven thiol–ene approach employing solely organic photocatalysts. The reaction proceeds under mild, metal‐free conditions. The fluorophore scope includes mono‐ and dialkene‐functionalized naphthalene, naphthalimide, and aromatic diimide derivatives.
Julieth Bellaizac‐Riascos   +4 more
wiley   +1 more source

9-Aryl Substituted Hydroxylated Xanthen-3-ones: Synthesis, Structure and Antioxidant Potency Evaluation

open access: yesCroatica Chemica Acta, 2015
Oxidative stress is directly related to several diseases and symptoms, where antioxidant compounds, such as xanthenes, may become important in prevention and/or treatmant.
Elma Veljović   +7 more
doaj   +1 more source

Fluorene‐based blue emitters: On the path to electrically pumped organic lasers

open access: yesFlexMat, EarlyView.
Electrically pumped efficient operation remains unrealized, a major challenge in optoelectronics. Fluorene‐based blue‐emitting semiconductors are promising gain media, thanks to their structural tunability and favorable emission properties. This review summarizes recent advances, highlights their reliability and versatility in lasing, and outlines key ...
Yong Yan   +7 more
wiley   +1 more source

Metal-free cross-dehydrogenative C–N coupling of azoles with xanthenes and related activated arylmethylenes

open access: yes, 2019
A metal-free C(sp3)–H/N–H cross-coupling of azoles with xanthenes and related activated arylmethylenes is presented. Both the use of azoles and the activation pattern of C(sp3)–H sources are essential for this transformation. In the presence of 2.0 equiv
Ying Dong (41989)   +6 more
core   +1 more source

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