Results 101 to 110 of about 23,969 (258)
Direct C–H Alpha Arylation of Enones with ArI(O2CR)2 Reagents [PDF]
, 2019 Herein, we report the metal-free direct C–H arylation of enones mediated by hypervalent iodine reagents. The reaction proceeds via a reductive iodonium Claisen rearrangement of in situ b-pyridinium silyl enol ethers.
Felipe Cesar Sousa e Silva (7520025) +5 more
core +2 more sources
European Journal of Organic Chemistry, EarlyView.The nickel‐catalyzed S═NH N‐arylation of sulfonimidamides is described, with useful demonstrated substrate scope involving inexpensive and widely available (hetero)aryl chloride reaction partners, including the active pharmaceutical ingredient chlorpromazine.
Samuel A. Fisher +2 more
wiley +1 more source
Synthesis of Flavones by Intramolecular O‐Arylation of Unactivated Halogenated Aryl‐1,3‐diketones
European Journal of Organic Chemistry, EarlyView.A protocol for the synthesis of flavone derivatives starting from mono‐ and dihalogenated diketones including fluorinated derivatives in a very simple and effective way is reported. Flavones are an important class of secondary metabolites in plants. Here we report a straightforward method for the conversion of unactivated halogenated 1,3‐biaryl‐1,3 ...
Lena Deutsch +8 more
wiley +1 more source
The arylation of 2-pyrones and related heterocycles [PDF]
, 2018 2-Pyrones, and related heterocycles such as 2-pyridones, 2-coumarins and 2- quinolones, are useful model substrates to test a novel methodology due to their varied chemical properties.
Prendergast, Aisling M.
core +1 more source
Chromium(II)-catalyzed enantioselective arylation of ketones
Beilstein Journal of Organic Chemistry, 2016 The chromium-catalyzed enantioselective addition of carbo halides to carbonyl compounds is an important transformation in organic synthesis. However, the corresponding catalytic enantioselective arylation of ketones has not been reported to date. Herein,
Gang Wang +4 more
doaj +1 more source
, 2016 Using TMPZnCl·LiCl as a kinetically highly active base, nitriles and esters undergo a Pd-catalyzed α-arylation under mild conditions. Remarkably, in the case of α,β- or β,γ-unsaturated nitriles, a regioselective γ-arylation or a γ-alkenylation is ...
Fraser F. Fleming (1520524) +4 more
core +1 more source
Carbon‐Supported Catalytic Systems Assembled by π–π Interactions
European Journal of Organic Chemistry, EarlyView.This review explores the noncovalent immobilization of organic and organometallic catalysts on carbonaceous supports through π–π interactions, highlighting its potential to enhance catalyst recovery, recyclability, and the sustainability of organic synthesis.
Chloé Jamalkhan +8 more
wiley +1 more source
, 2016 The use of aryl triflates as reaction partners in a palladium-catalyzed domino direct arylation/N-arylation provides a great advantage due to the availability of starting materials.
Mathieu Blanchot (2222254) +3 more
core +1 more source
European Journal of Organic Chemistry, EarlyView.A tailored, electron‐rich, anisotropic cyclopentadienyl ligand enables rhodium(III)‐catalyzed ortho arylation of aryl ketones at 80 °C using readily available arylboronic acid pinacol esters. Direct use of a cationic catalyst promotes binding of the weak ketone directing group, while scope and competition experiments reveal how ketone electronics and ...
Laura Thirion +2 more
wiley +1 more source
An easy direct arylation of 5-pyrazolones
Beilstein Journal of Organic Chemistry, 2013 A mild, efficient and catalytic ligand-free method for the direct arylation of 5-pyrazolones by Pd-catalyzed C–H bond activation is reported. The process smoothly proceeds and yields are moderate to excellent.
Hao Gong +3 more
doaj +1 more source