Results 111 to 120 of about 65,551 (284)
Oxidative Generation and Reactivity of the Cyclopropyl Radical From a Martin Silicate
Chemistry – A European Journal, EarlyView.A photoredox strategy employing Martin silicates enables the oxidative generation and controlled capture of cyclopropyl radicals, including the naked one, long considered challenging intermediates. The method affords functionalized cyclopropanes through both Giese‐type additions and dual nickel/photoredox C(sp3)−C(sp2) cross‐couplings.
Amal Lakhal +3 more
wiley +1 more source
, 2013 We investigated the effects of coumarin application on growth, net nitrate uptake, concentration of nitrate (NO3-), ammonium (NH4+), soluble proteins and enzymes [nitrate reductase (NR), glutamine synthase (GS) and glutamate dehydrogenase (GDH ...
Zhou, Xianrong +3 more
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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 +1 more
wiley +1 more source
Control of Gemcitabine Activity With Blue and Red Light
Chemistry – A European Journal, EarlyView.Treating cancer with chemotherapy is generally associated with many side effects, which can be addressed by selectively releasing the desired drugs with visible light. Sixteen new blue light‐activatable cytostatics were introduced, with the gemcitabine derivative exhibiting ideal properties.
Nils F. Kersten +6 more
wiley +1 more source
π‐Extended Salphen Scaffolds Enable CO2 Electroreduction and Singlet Oxygen Generation
Chemistry – A European Journal, EarlyView.New family of π‐extended salen ligands bearing phenylene bridge and tunable phenyl‐based substituents, and their corresponding boron difluoride complexes. Thanks to the extended π‐delocalization over the molecule, the ligands themselves show promising results in electrochemical CO2 reduction to CO, while the complexes act as efficient photosensitizers ...
Vincenzo Langellotti +10 more
wiley +1 more source
Semi-quantitative method for determining coumarin derivatives in objects of various origin
Разработка и регистрация лекарственных средствIntroduction. Coumarin and its derivatives are biologically active substances (BAS) of plant origin that exhibit a range of pharmacological activities as well as toxicological effects.
V. S. Shurakova +4 more
doaj +1 more source
Chemistry – A European Journal, EarlyView.A new silver‐catalyzed H/D exchange reaction was developed for the labelling of quinones and related compounds. Both homogeneous and heterogeneous catalytic processes were implemented using heavy water as a simple deuterium source. The corresponding deuterated compounds were obtained with high isotopic enrichment through a practical method that opens ...
Joyce C. de Oliveira +7 more
wiley +1 more source
, 1934 Action of Chlorine and Bromine on Coumarin-4-and Coumarin-3-acetic Acids : Coumarin-3- and -4-halogenoacetic Acids and 4 ...
(Miss) K. RADHABAI, B. B. DEY
core +1 more source
Chemistry – A European Journal, EarlyView.Robust, bio‐derived, and freestanding films based on cellulose nanocrystals (CNCs), covalently decorated with achiral fluorophores, transduce shape chirality and supramolecular helicity into near‐white circularly polarized luminescence (CPL). With composites covering the visible spectrum, near‐white, right‐handed CPL with high luminescence dissymmetry (
Asmita Shah +10 more
wiley +1 more source
Coumarin containing hybrids and their pharmacological activities
, 2022 Coumarin moiety is of great interest to both chemists and biologists as it is present in a wide variety of naturally occurring bioactive compounds. Studies have lent scientific credence to the biological activities of several coumarin derivatives.
Makhanya, Talent R. +4 more
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