Results 241 to 250 of about 113,868 (281)

Montmorillonite K-10 catalyzed synthesis of Hantzsch dihydropyridine derivatives from methyl arenes via in situ generated ammonia under microwave irradiation in neat conditions. [PDF]

RSC Adv
Singh V, Rajput K, Singh S, Srivastava V.   +3 more
europepmc   +1 more source

Photothermal Conversion Promotes Challenging SNAr for Facile C─N Bond Formation

Angewandte Chemie, EarlyView.
Photothermal conversion enables facile aromatic C─N bond formation via red light irradiation. A variety of inter‐ and intramolecular SNAr transformations are achieved under mild, schematically simple conditions. Additionally, a thermally promoted halogen exchange mechanism provides access to aryl bromides, chlorides, and fluorides – making this ...
Megan E. Matter, Rory C. Devin, Erin E. Stache   +2 more
wiley   +1 more source

Temperature‐Responsive Near‐Infrared Emission Enabled by Reversible π‐Umpolung with an Alkenyl‐Strapped Diarylboryl Unit

Angewandte Chemie, EarlyView.
Coordination of a Lewis base switches an electron‐accepting tricoordinate boron center into an electron‐donating tetracoordinate one. An alkenyl‐strapped diphenylthienylboryl π‐system undergoes phosphine‐induced reversible π‐umpolung, where transformation from an acceptor–acceptor–acceptor framework to a donor–acceptor–donor system gives rise to ...
Satoru Kitamura, Mika Sakai, Shigehiro Yamaguchi   +2 more
wiley   +1 more source

Sustainable Ammonia Electrosynthesis Coupled With Glycerol Valorization via an Adaptive Tri‐Component Catalyst

Angewandte Chemie International Edition, EarlyView.
A Cu‐Ni‐W tri‐component catalyst enables efficient nitrate‐to‐ammonia conversion under pulsed electrolysis. Combined experimental and theoretical studies attribute its performance to component synergism and regulated intermediates. Its facile adaptation for glycerol valorization to formic acid underscores a versatile system design concept, advancing ...
Christean Nickel, David Leander Troglauer, Chia‐Yu Chang, Tiansheng Bai, Tobias Rios‐Studer, Ingo Lieberwirth, Kevin Sowa, Boris Mashtakov, Bahareh Feizi Mohazzab, Lijie Ci, Deping Li, Xiaohang Lin, Bing Joe Hwang, Rongji Liu, Dandan Gao   +14 more
wiley   +1 more source

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CHAPTER 18. Microwave Irradiation

2021
Microwaves (MWs) represent a convenient and rapid source of heating, affecting high temperature reactions by shortening the reaction times, while significantly affecting the quality and quantity of the desired products. Depending on the organic transformation, MWs might have a specific effect in enhancing the reaction rates compared to conventional ...
Maramai, Samuele, Taddei, Maurizio
openaire   +3 more sources

Formaldehyde fixation and microwave irradiation

The Histochemical Journal, 1988
Formaldehyde is the most commonly used fixative in pathology laboratories. However, due to time pressures, this fixative is often not optimally exploited. The majority of biopsies are only partly fixed when histoprocessing is started, with adverse effects.
BOON, ME, GERRITS, PO, MOORLAG, HE, NIEUWENHUIS, P, KOK, LP   +4 more
openaire   +3 more sources

Microwave Irradiation in Organic Synthesis

ChemInform, 2005
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Nelly N Romanova, Alexander G Gravis, Nikolai V Zyk   +2 more
openaire   +1 more source

Behavioral Sensitivity to Microwave Irradiation

Science, 1971
Rats assayed by the technique of conditional suppression were able to detect the presence of 12.25-centimeter microwaves at doses of power approximating 0.5 to 6.4 milliwatts per gram. The assay, which controlled for sensitization, for pseudo and temporal conditioning, and for several possible sources of artifactual cueing, revealed that irradiation by
N W, King, D R, Justesen, R L, Clarke
openaire   +3 more sources

Medical microwave irradiator coagulator

2000 10th International Crimean Microwave Conference. "Microwave and Telecommunication Technology". Conference Proceedings (IEEE Cat. No.00EX415), 2000
The design of an experimentally tested microwave irradiator-coagulator is described. Characteristics of the microwave radiation source small-size continuously operating 8 millimeter magnetron are presented. Results of the preliminary clinical approbation and prospects for an application are discussed for an experimental specimen of the portable medical
A.A. Gurko, V.D. Yeremka, L.V. Pisarenko, N.K. Goloborod'ko   +3 more
openaire   +1 more source

Cross-Metathesis Assisted by Microwave Irradiation

The Journal of Organic Chemistry, 2005
Microwave irradiation effectively accelerates cross-coupling metathesis reactions between deactivated olefins. Reactions have been carried out with the phosphine-free Hoveyda-Grubbs catalyst and the "second generation Grubbs' catalyst." While there have been reports that a "microwave effect" is observed in various transformations, the accelerations we ...
Frédéric C, Bargiggia, William V, Murray   +1 more
openaire   +2 more sources