Results 91 to 100 of about 55,695 (341)

1,5-Induction in reactions between 2-alkoxy-(2-tributylstannylethylidene)cyclohexanes and aldehydes

open access: yesJournal of the Brazilian Chemical Society, 2001
2-Methoxy(2-tributylstannylethylidene)cyclohexane 16 undergoes stereoselective transmetalation on treatment with tin(IV) chloride to generate the allyltin trichloride 19 which reacts with aldehydes to give the (Z)-(3-hydroxyalkylidene)-2 ...
Kumar Poonam   +2 more
doaj  

Pushing the limits of concertedness. A waltz of wandering carbocations. [PDF]

open access: yes, 2019
Among the array of complex terpene-forming carbocation cyclization/rearrangement reactions, the so-called "triple shift" reactions are among the most unexpected.
Castiñeira Reis, Marta   +3 more
core  

Enhancing Organic Light‐Emitting Diode Performance Using Naturally Derived Diatomite: A Cost‐Effective and Eco‐Friendly Strategy

open access: yesAdvanced Optical Materials, EarlyView.
Diatomite‐based light extraction structures enable enhanced photon outcoupling through multi‐angle scattering and far‐field redistribution. By harnessing the unique scattering behavior of diatomite, this approach introduces randomly oriented scattering centers that effectively reshape internal light propagation.
Chang Min Lee   +12 more
wiley   +1 more source

Highly-functionalised difluorinated cyclohexane polyols via the Diels–Alder reaction : regiochemical control via the phenylsulfonyl group [PDF]

open access: yes, 2005
A difluorinated dienophile underwent cycloaddition reactions with a range of furans to afford cycloadducts whichcould be processed regio- and stereoselectively via episulfonium ions, generated by the reaction between their alkenyl groups and ...
Crowley, Patrick J   +5 more
core   +1 more source

Competitive Bidirectional Response in Bi‐Polymeric Mechanochromic Cantilevers Toward Color Imaging‐Based VOC Discrimination

open access: yesAdvanced Optical Materials, EarlyView.
In bi‐polymeric mechanochromic cantilevers composed of polydimethylsiloxane (PDMS) and off‐stoichiometry thiol‐ene‐epoxy (OSTE+), differential swelling between the two polymers in response to VOC exposure induces a competitive bidirectional bending and corresponding color changes, with three characteristic response modes related to the Hansen ...
Ferran Pujol‐Vila   +2 more
wiley   +1 more source

Nitromethane conjugate addition to 2-[(1E,3E)-4-arylbuta-1,3-dien-1-yl]-4Hchromen- 4-ones [PDF]

open access: yes, 2017
Chromone are a group of oxygen-containing heterocycles, which are often associated to important biological activities.1 Chromone derivatives are also seen as interesting scaffolds to input further functionalizations,2 most of them through chemical ...
Albuquerque, Hélio   +3 more
core   +1 more source

Fluorescent sensing of maleate versus fumarate by a neutral cyclohexane based thiourea receptor [PDF]

open access: yes, 2006
A new cyclohexyl based fluorescent anion receptor, is able to recognize maleate versus fumarate both as their TMA salts.Costero Nieto, Ana Maria, Ana.Costero@uv.es ; Colera Llavata, Manuel, Manuel.Colera@uv.es ; Gaviña Costero, Pablo, Pablo.Gavina@uv.es ;
Colera Llavata, Manuel   +3 more
core   +2 more sources

Photoluminescence of Mechanochemically Manufactured Rare‐Earth Doped CsPbCl3 Microcrystals

open access: yesAdvanced Photonics Research, EarlyView.
The mechanochemical approach presented in this work allows for exceptional control over dopant incorporation, producing high‐quality powders suited to melt‐growth of single crystals. Through complementary structural characterization techniques (X‐ray diffraction, energy‐dispersive X‐ray spectroscopy, and X‐ray fluorescence), the nominal doping ...
Morris E. Olumba   +8 more
wiley   +1 more source

Cooperative Photocatalysis of 9,10‐Phenanthrenequinone and Sn(OTf)2 for Direct Mannich Reaction of Ethers via Hydrogen Atom Transfer Pathway

open access: yesAdvanced Synthesis &Catalysis, EarlyView.
A dual photocatalytic system of o‐PQ and Sn(OTf)2 enables visible light‐induced Mannich‐type addition of ethers to nitrones via Csp³–H activation. This oxidant‐free method offers broad scope and good yields. Mechanistic studies suggest that a photoexcited o‐PQ–Sn(II) complex mediates hydrogen atom transfer to form α‐oxy radicals for nitrone addition. A
Pradip Ramdas Thorve   +2 more
wiley   +1 more source

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