Results 51 to 60 of about 22,861 (258)

Deprotonation and Alkylation of Weakly Acidic C(sp3)─H Bonds Through In Situ Generation of a Strong Hydride Base From 1,1,3,3‐Tetramethyldisiloxane and Potassium tert‐Butoxide

Angewandte Chemie, EarlyView.
The use of 1,1,3,3‐tetramethyldisiloxane (TMDSO) and potassium tert‐butoxide enables direct alkylation of weakly acidic carbon–hydrogen bonds with alkyl halides. Experimental and computational studies support the formation of a substrate‐associated hydride‐like base, providing a single‐step alternative to the classical deprotonation and electrophile ...
Piers St. Onge, Brandon White, Han Yao, Travis Dudding, Stephen G. Newman   +4 more
wiley   +2 more sources

Dyotropic Rearrangement of Hypervalent Iodine Species: Migrative Heterofunctionalization of Quaternary Carbons

Angewandte Chemie, EarlyView.
1,2‐Aryl migration involving in situ‐generated alkyl iodine(III) species proceeds through a previously unrecognized 1,2‐C/I(III) dyotropic rearrangement. Migratory aryl fluorination, acetoxylation, and alkoxylation of 2‐alkyl‐2‐aryl‐3‐iodopropanoates provide α‐heterofunctionalized products, accompanied by aryl migration from the α‐ to the β‐position ...
Chen‐Xu Liu, Qian Wang, Matthew D. Wodrich, Jieping Zhu   +3 more
wiley   +2 more sources

Copper-Catalyzed Synthesis of Axially Chiral Biaryls with Diaryliodonium Salts as Arylation Reagents

Molecules, 2021
NOBIN and BINAM derivatives harboring biaryl frameworks are recognized as a class of important atropisomers with versatile applications. Here, we present an efficient synthetic route to access such compounds through copper-catalyzed domino arylation of N-
Ji-Wei Zhang, Shao-Hua Xiang, Shaoyu Li, Bin Tan   +3 more
doaj   +1 more source

Speciation‐Controlled C–F Bond Functionalization Enabled by Zwitterionic Pnictinidenes

Angewandte Chemie, Volume 138, Issue 39, 21 September 2026.
Zwitterionic pnictinidenes turn C–F activation into C–X bond construction, enabling broad defluorinative functionalization of polyfluoro(hetero)arenes under mild conditions. Rather than following a metallomimetic Sb(I)/Sb(III) redox turnover, catalysis is redirected by ligand scrambling into a redox‐neutral manifold, revealing catalyst speciation as a ...
Irene Sánchez‐Sordo, Sergio Fernandez, Selwin Fernando, Diego M. Andrada, Oriol Planas   +4 more
wiley   +2 more sources

Electrocatalytic Polarity Inversion of Azlactones: Access to α‐Quaternary Amino Acids with Electron‐Rich SOMOphiles

Angewandte Chemie, EarlyView.
Electrocatalytic polarity inversion of azlactones unlocks their coupling with electron‐rich reaction partners. Triarylamine‐mediated oxidation of the azlactone enolate generates an electrophilic radical intermediate that undergoes selective C4 functionalization with diverse SOMOphiles.
Paula Rodríguez, David Buedo, Alberto Vega‐Peñaloza, Kian Gosling, Stuart C. D. Kennington, Bart Limburg, Xavier Companyó   +6 more
wiley   +2 more sources

Copper-catalyzed asymmetric sp3 C–H arylation of tetrahydroisoquinoline mediated by a visible light photoredox catalyst

Beilstein Journal of Organic Chemistry, 2016
This report describes a highly enantioselective oxidative sp3 C–H arylation of N-aryltetrahydroisoquinolines (THIQs) through a dual catalysis platform. The combination of the photoredox catalyst, [Ir(ppy)2(dtbbpy)]PF6, and chiral copper catalysts provide
Pierre Querard, Inna Perepichka, Eli Zysman-Colman, Chao-Jun Li   +3 more
doaj   +1 more source

Strategies Towards the Synthesis of N2-Substituted 1,2,3-Triazoles

Anais da Academia Brasileira de Ciências, 2019
The chemistry of 1,2,3-triazoles gained much attention since the discovery of the copper catalyzed Alkyne-azide cycloaddition (CuAAC) reaction which delivers exclusively the 1,4-regioisomer in high yields.
RODRIGO OCTÁVIO M.A. DE SOUZA, LEANDRO S. DE MARIZ E MIRANDA   +1 more
doaj   +1 more source

“On Water” Palladium Catalyzed Direct Arylation of 1H-Indazole and 1H-7-Azaindazole

Molecules, 2020
The C3 direct arylation of 1H-indazole and 1H-7-azaindazole has been a significant challenge due to the lack of the reactivity at this position. In this paper, we describe a mild and an efficient synthesis of new series of C3-aryled 1H-indazoles and C3 ...
Khadija Gambouz, Abdelmoula El Abbouchi, Sarah Nassiri, Franck Suzenet, Mostapha Bousmina, Mohamed Akssira, Gérald Guillaumet, Saïd El Kazzouli   +7 more
doaj   +1 more source

Pd‐Catalyzed Asymmetric Dearomative Heck/Tsuji‐Trost Difunctionalization of Naphthalenes

Advanced Science, EarlyView.
We have developed a palladium‐catalyzed asymmetric dearomative Heck/Tsuji‐Trost 1,4‐difunctionalization reaction of naphthalenes, affording 4‐aminospirocyclohexene oxindole products bearing two remote chiral centers. Through the effect of the newly designed chiral sulfinamide phosphine ligand with large steric hindrance, side reactions are inhibited ...
Long‐Ling Ma, Bing Xu, Junliang Zhang, Zhan‐Ming Zhang   +3 more
wiley   +1 more source

The C3-H Bond Functionalization of Quinoxalin-2(1H)-Ones With Hypervalent Iodine(III) Reagents

Frontiers in Chemistry, 2020
The modification of quinoxalin-2(1H)-ones via direct C-H bond functionalization has begun to receive widespread attention, due to quinoxalin-2(1H)-one derivatives' various biological activities and pharmaceutical properties. This mini review concentrates
Yushi Tan, Jiabo Wang, Hong-Yu Zhang, Yuecheng Zhang, Jiquan Zhao   +4 more
doaj   +1 more source