Results 21 to 30 of about 349,174 (276)

Catalytic System for Cross-Coupling of Heteroaryl Iodides with a Nitronyl Nitroxide Gold Derivative at Room Temperature

Molecules, 2023
A simple and highly effective methodology for the cross-coupling of heteroaryl iodides with NN–AuPPh3 at room temperature is reported. The protocol is based on a novel catalytic system consisting of Pd2(dba)3·CHCl3 and the phosphine ligand MeCgPPh having
Igor Zayakin, Galina Romanenko, Irina Bagryanskaya, Bogdan Ugrak, Matvey Fedin, Evgeny Tretyakov   +5 more
doaj   +1 more source

Access and Modulation of Substituted Pyrrolo[3,4-c]pyrazole-4,6-(2H,5H)-diones

Molecules, 2023
The first access to polyfunctionnalized pyrrolo[3,4-c]pyrazole-4,6-(2H,5H)-dione derivatives is reported. The series were generated from diethyl acetylenedicarboxylate and arylhydrazines, which afforded the key intermediates bearing two functional ...
Abdelaziz Ejjoummany, Jonathan Elie, Ahmed El Hakmaoui, Mohamed Akssira, Sylvain Routier, Frédéric Buron   +5 more
doaj   +1 more source

Bulky-yet-flexible carbene ligands and their use in palladium cross-coupling [PDF]

, 2019
In recent years, several classes of new N-heterocyclic carbene (NHC) ligands were developed around the concept of flexible steric bulk. The steric hindrance of these ligands brings stability to the active species, while ligand flexibility still allows ...
Cazin, Catherine, Nahra, Fady, Vanden Broeck, Sofie   +2 more
core   +1 more source

3-Aryl-5-aminobiphenyl Substituted [1,2,4]triazolo[4,3-c]quinazolines: Synthesis and Photophysical Properties

Molecules, 2023
Amino-[1,1′]-biphenyl-containing 3-aryl-[1,2,4]triazolo[4,3-c]quinazoline derivatives with fluorescent properties have been designed and synthesized. The type of annelation of the triazole ring to the pyrimidine one has been unambiguously confirmed by ...
Alexandra E. Kopotilova, Tatyana N. Moshkina, Emiliya V. Nosova, Galina N. Lipunova, Ekaterina S. Starnovskaya, Dmitry S. Kopchuk, Grigory A. Kim, Vasiliy S. Gaviko, Pavel A. Slepukhin, Valery N. Charushin   +9 more
doaj   +1 more source

2,3,3 ',4 '-tetramethylbiphenyl [PDF]

, 2005
2,3,3',4'-Tetramethylbiphenyl, C₁₆H₁₈, was synthesized in a palladium-catalysed boronic acid cross-coupling reaction.
Price, D.J., Robertson, A.J.
core   +1 more source

Palladium-Catalyzed Modification of Unprotected Nucleosides, Nucleotides, and Oligonucleotides

Molecules, 2015
Synthetic modification of nucleoside structures provides access to molecules of interest as pharmaceuticals, biochemical probes, and models to study diseases.
Kevin H. Shaughnessy
doaj   +1 more source

Synthesis of chiral germanium center enabled by poly-deborylative alkylation and desymmetrization

Nature Communications
Chiral germanium centers are historically undervalued due to their extremely limited synthetic accessibility. Although germanium shares similar chemical properties with silicon, synthesizing chiral germanium centers proves significantly more challenging.
Ke Wang, Xin-Yuan Liu, Zhe Dong
doaj   +1 more source

Non-linear MPC for winding loss optimised torque control of anisotropic PMSM

The Journal of Engineering, 2019
For a non-linear anisotropic permanent magnet synchronous machine (PMSM), a prediction model for model predictive control (MPC) considering effects like cross-coupling and saturation is developed in a straight forward procedure.
Christoph Schnurr, Sören Hohmann, Johannes Kolb   +2 more
doaj   +1 more source

Improved signal injection based sensorless technique for PM brushless AC drives [PDF]

, 2007
The accuracy of rotor position estimation in the conventional signal injection based sensorless control of permanent magnet brushless AC drives depends on the load current.
Bingham, Chris, Howe, D., Li, Y., Zhu, Z .Q.   +3 more
core   +1 more source

Mapping the evolution of mitochondrial complex I through structural variation

FEBS Letters, EarlyView.
Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin, Tingting Chen, James A. Letts   +2 more
wiley   +1 more source