Results 81 to 90 of about 23,969 (258)

Azoimidazolium Salts as a Platform for Persistent Neutral Aminyl Radicals and Mesoionic Carbene Au(I) Complexes as Cell‐Permeable Fluorophores

Chemistry – A European Journal, EarlyView.
Strategic electronic matching between imidazolium salts and aryldiazonium salts enables a chromatography‐free route to versatile azoimidazolium scaffolds. Fine‐tuning the substituents unveils a powerful dichotomy: strong ─OMe resonance stabilizes highly persistent neutral aminyl radicals (up to 3 weeks), whereas the superior ─NMe2 donor strength yields
Diego Dusso, Osvaldo F. López‐Saladino, Ixsoyen F. Vázquez‐Sandoval, Arturo Jiménez‐Sánchez, Virginia Gómez‐Vidales, Marcos Flores‐Álamo, Susana Porcel‐García   +6 more
wiley   +1 more source

Selective Formation of a 1,2‐Diborane(4) and Alcohol‐Driven B─B Bond Cleavage to Generate H2

Chemistry – A European Journal, EarlyView.
Diborane(4) chemistry reveals unusual reactivity of electron‐deficient p‐block compounds. Reaction of B2Cat2 (Cat = benzene‐1,2‐diolate) with mesityllithium (MesLi; Mes = 2,4,6‐trimethylphenyl) gives a rare 1,2‐diborane(4) featuring a catecholate ligand. Alcoholysis cleaves the B─B bond and ultimately generates H2.
Rayni P. Noriega, David J. Nelson, Marcus W. Drover   +2 more
wiley   +1 more source

Synthesis of Novel 3,6-Dithienyl Diketopyrrolopyrrole Dyes by Direct C-H Arylation

Molecules, 2020
Direct C-H arylation coupling is potentially a more economical and sustainable process than conventional cross-coupling. However, this method has found limited application in the synthesis of organic dyes for dye-sensitized solar cells. Although direct C-
Amsalu Efrem Yemene, Vishwesh Venkatraman, David Moe Almenningen, Bård Helge Hoff, Odd Reidar Gautun   +4 more
doaj   +1 more source

Chemoselective synthesis of aryl(pyridinyl)methanol derivatives through Ni-NIXANTPHOS catalyzed α-arylation and tandem arylation/rearrangement of pyridylmethyl ethers

, 2018
An efficient synthesis of aryl(pyridyl)-methanol derivatives using Ni-NIXANTPHOS catalyzed α-arylation and tandem arylation/rearrangement is described.
Bijun Wang, Byeong-Seon Kim, Guogang Deng, Minyan Li, Xiaodong Yang, Zhengfen Liu, Wen Chen, Hongbin Zhang, Patrick J. Walsh   +8 more
core   +1 more source

Hypervalent Iodine Phenol Dearomatization Mediated by Mechanochemistry

Chemistry – A European Journal, EarlyView.
A solvent‐free mechanochemical process has been developed that enables the rapid oxidative dearomatization of phenols. This method produces spiranic dienones with decent to good yields. This process eliminates the need for expensive and environmentally harmful perfluorinated alcohols, such as hexafluoroisopropanol and trifluoroethanol, while adhering ...
Jérémie Cuillerier, Camille Rocq, Xavier Ottenwaelder, Sylvain Canesi   +3 more
wiley   +1 more source

Peripheral Arylation of Subporphyrazines

Chemistry – A European Journal, 2013
AbstractPeripherally hexaarylated subporphyrazines (SubPzs) have been prepared through a Pd‐catalyzed, CuTC‐mediated coupling of a hexaethylsulfanylated subporphyrazine with arylboronic acids. The introduced aryl substituents strongly influence the electronic properties of the subporphyrazine through effective conjugative interaction.
Higashino T., Rodríguez-Morgade M.S., Osuka A., Torres, Tomás   +3 more
openaire   +3 more sources

Synthesis of 2,2,5-Trisubstituted 2H‑Pyrroles and 2,3,5-Trisubstituted 1H‑Pyrroles by Ligand-Controlled Site-Selective Dearomative C2-Arylation and Direct C3-Arylation

, 2019
Palladium-catalyzed site-selective dearomative C2-arylation of 2,5-diaryl-1H-pyrroles with aryl chlorides was accomplished, and a series of 2,2,5-triaryl-2H-pyrroles were synthesized.
Sakiko Fujiwara, Sakiko Fujiwara (7180421), Miyuki Yamaguchi (1814692), Kei Manabe (1814695), Miyuki Yamaguchi, Kei Manabe   +5 more
core   +1 more source

Highly Regioselective Arylation of sp³ C−H Bonds Catalyzed by Palladium Acetate

, 2016
A new palladium-catalyzed arylation process based on C−H activation has been developed. The utilization of pyridine-containing directing groups allows the β-arylation of carboxylic acid derivatives and γ-arylation of amine derivatives.
Vladimir G. Zaitsev (2669500), Olafs Daugulis (1322985), Dmitry Shabashov (1903090)   +2 more
core   +3 more sources

Scale‐down before you scale‐up: Organic electronic materials scaled at Xerox Research Centre of Canada

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract Organic electronics have emerged as a key class of functional materials for organic light‐emitting diodes (OLEDs), organic photovoltaics (OPVs), organic field‐effect transistors (OFETs), sensors, and printed electronics. However, commercialization remains dependent on the ability to reproducibly synthesize and manufacture high‐performance ...
Marko D. Saban, Benoît H. Lessard
wiley   +1 more source

Remote Migratory Reductive Arylation of Unactivated Alkenes Enabled by Electrochemical Nickel Catalysis

ChemSusChem, Volume 18, Issue 6, March 15, 2025.
we have developed an electrochemical Ni−H catalyzed arylation coupling method of unactivated alkenes with aryl halides. The method displays broad functional group tolerance and proceeds under very mild conditions. Furthermore, aryl chlorides were also compatible substrates in this catalytic system. This conversion holds significant implications for the
Chao Xu, Ru‐Han A, Xiao‐Feng Wu
wiley   +1 more source