Results 31 to 40 of about 80,380 (385)

Application of Flow Thermolysis in Organic Synthesis: Easy Access to α,ω-Bis Thienyl- and Bis Pyrrolyl- Alkanes from Methylene Derivatives of Meldrum's Acid

Molecules, 2000
Thermal decomposition of Meldrum's acid derivatives and rearrangement of (alkylsulfanyl) or (propargylamino)methylene ketene intermediates leads in one step to bis thienyl- or bis pyrrolyl-alkanes.
Hamid Dhimane, Fanck Jourdain, Jean Claude Pommelet   +2 more
doaj   +1 more source

Flavouring Group Evaluation 21 Revision 6 (FGE.21Rev6): thiazoles, thiophenes, thiazoline and thienyl derivatives from chemical groups 29 and 30

EFSA Journal, 2023
The Panel on Food additives and Flavourings (FAF) was requested to evaluate the flavouring substances 2,4‐dimethyl‐3‐thiazoline [FL‐no: 15.060] and 2‐isobutyl‐3‐thiazoline [FL‐no: 15.119] in Flavouring Group Evaluation 21 revision 6 (FGE.21Rev6).
EFSA Panel on Food Additives and Flavourings (FAF), Maged Younes, Gabriele Aquilina, Laurence Castle, Gisela Degen, Karl‐Heinz Engel, Paul J Fowler, Maria Jose Frutos Fernandez, Peter Fürst, Ursula Gundert‐Remy, Rainer Gürtler, Trine Husøy, Melania Manco, Sabina Passamonti, Peter Moldeus, Romina Shah, Ine Waalkens‐Berendsen, Matthew Wright, Romualdo Benigni, Claudia Bolognesi, Kevin Chipman, Eugenia Cordelli, Karin Nørby, Camilla Svendsen, Maria Carfì, Wim Mennes   +25 more
doaj   +1 more source

Biodesulphurized subbituminous coal by different fungi and bacteria studied by reductive pyrolysis. Part 1: Initial coal [PDF]

, 2008
One of the perspective methods for clean solid fuels production is biodesulphurization. In order to increase the effect of this approach it is necessary to apply the advantages of more informative analytical techniques.
Carleer, R., Dinler-Doğanay, Gizem, Dumanlı, Ahu Gümrah, Gonsalvesh, L., Kolankaya, N., Marinov, S.P., Reggers, G., Sam, M., Stefanova, M., Thijssen, E., Yperman, J., Yürüm, Yuda   +11 more
core   +1 more source

Microwave-Assisted Synthesis of some Novel Azoles and Azolopyrimidines as Antimicrobial Agents

Molecules, 2017
In this study, new derivatives of pyrazole, isoxazole, pyrazolylthiazole, and azolopyrimidine having a thiophene ring were synthesized under microwave irradiation.
Sobhi M. Gomha, Thoraya A. Farghaly, Yahia Nasser Mabkhot, Mohie E. M. Zayed, Amany M. G. Mohamed   +4 more
doaj   +1 more source

Triggering redox activity in a thiophene compound: radical stabilization and coordination chemistry [PDF]

, 2006
The synthesis, metalation, and redox properties of an acyclic bis(iminothienyl)methene L− are presented. This π-conjugated anion displays pronounced redox activity, undergoing facile one-electron oxidation to the acyclic, metal-free, neutral radical L ...
Davison, Gray, Gray, Schrauzer, Eisenberg, Sproules, Lyons, Kaim, Krężel, Jacquet, Huang, Broere, Greenhalgh, Luca, Munhá, Lyaskovskyy, Praneeth, Kaim, Chirik, Chirik, Annibale, Pankhurst, Pankhurst, Kochem, Reddy, Schweyen, Yoshida, Tanaka, Claessens, Hennessy, Loudet, Kaszyński, Chatterjee, Rasmussen, Gopalakrishna, Wakamiya, Tabakovic, d'Oro, Singh, Kawase, Davenport, Kia, Chen, Doshi, Latos-Grazynski, Lucas, Lane   +46 more
core   +2 more sources

Ag(I)–C–H Activation Enables Near-Room-Temperature Direct α-Arylation of Benzo[b]thiophenes

Journal of the American Chemical Society, 2018
The first example of near-room-temperature α-arylation of benzo[b]thiophenes is reported. The discovery rests on the observation of a switch in α-/β-regioselectivity at different loadings of Pd2(dba)3·CHCl3 in the coupling between benzo[b]thiophene and 4-
C. Colletto, Adyasha Panigrahi, J. Fernández-Casado, Igor Larrosa   +3 more
semanticscholar   +1 more source

Light absorption spectra in oligothiophene molecules [PDF]

, 2017
Para el dictado de clases, se pueden utilizar diferentes herramientas que nos brindan las nuevas tecnologías; herramientas que nos están modificando los procesos de enseñanza-aprendizaje.
Gala, Fabrizio, Zollo, Giuseppe
core   +2 more sources

Regiocontroled Pd-catalysed C5-arylation of 3-substituted thiophene derivatives using a bromo-substituent as blocking group

Beilstein Journal of Organic Chemistry, 2016
The use of a bromo-substituent as blocking group at the C2-position of 3-substituted thiophenes allows the regioselective introduction of aryl substituents at C5-position via Pd-catalysed direct arylation.
Mariem Brahim, Hamed Ben Ammar, Jean-François Soulé, Henri Doucet   +3 more
doaj   +1 more source

Direct Vicinal Difunctionalization of Thiophenes Enabled by the Palladium/Norbornene Cooperative Catalysis.

Journal of the American Chemical Society, 2019
Herein we report a direct vicinal difunctionalization of thiophenes via the palladium/norbornene (Pd/NBE) cooperative catalysis. A series of mono- and disubstituted thiophenes can be difunctionalized site- and regio-selectively at the C4 and C5 positions
Renhe Li, Yun Zhou, Xiaolong Xu, Guangbin Dong   +3 more
semanticscholar   +1 more source

Reversible Emission Tunability from 2D‐Layered Perovskites with Conjugated Organic Cations

Advanced Photonics Research, 2021
The structural flexibility of 2D‐layered halide perovskites provides unprecedented opportunities for tuning their optical properties. For example, lattice distortions facilitate white emission that stems from self‐trapped excitons or defects, and organic
Balaji Dhanabalan, Renuka D. Pothuraju, Sergio Marras, Lea Pasquale, Liberato Manna, Roman Krahne, Milena P. Arciniegas   +6 more
doaj   +1 more source