Results 31 to 40 of about 8,304 (240)

Deprotonative C(sp3)/C(sp2)–H (Multi)Silylation of (Hetero)Arenes Mediated by NaTMP

Angewandte Chemie, EarlyView.
An operationally simple protocol using a strongly basic sodium amide in combination with sterically emcumbered silicon electrophiles enables the deprotonative C–H (multi)silylation of a myriad of (hetero)arenes. Mechanistic investigations highlight the pivotal role of steric and coordination effects in controlling the regioselectivity and efficiency of
David Sánchez‐Roa, Sophia Belrhomari, Ana McGinley, Clevin Anto Liju, Manting Mu, Max García‐Melchor, Eva Hevia   +6 more
wiley   +2 more sources

Antipoliovirus activity of the organic extract of Eupatorium buniifolium: isolation of euparin as an active compound [PDF]

, 2013
The antiviral activity of the organic extract (OE) of Eupatorium buniifolium against poliovirus type 1 was determined by in vitro assays with an effective concentration 50 (EC50) of 23.3 ± 3.3 µg/mL.
Campos, Rodolfo Hector, Cavallaro, Lucía, Martino, Virginia Susana, Muschietti, Liliana Victoria, Visintini Jaime, María Florencia   +4 more
core   +3 more sources

Regioselective Synthesis of Benzylsilanols from Kobayashi‐Type Reagents via C(sp3)─H Bond Activating 1,4‐Palladium Migration

Angewandte Chemie, EarlyView.
A Pd‐catalyzed regioselective synthesis of benzylsilanols from Kobayashi‐type reagents has been developed through a mechanistically distinct approach involving 1,4‐Pd migration followed by intramolecular transmetalation. The reaction can be combined with various prior transition‐metal‐catalyzed processes and the resulting benzylsilanols have been ...
Ryo Shintani, Keisuke Tachibana
wiley   +2 more sources

One-Step Regioselective Synthesis of Benzofurans from Phenols and α-Haloketones

Molecules, 2019
Reported here is the direct synthesis of naphthofurans and benzofurans from readily available phenols and α-haloketones promoted by titanium tetrachloride which combines Friedel−Crafts-like alkylation and intramolecular cyclodehydration into ...
Bingqiao Wang, Qiu Zhang, Juan Luo, Zongjie Gan, Wengao Jiang, Qiang Tang   +5 more
doaj   +1 more source

Synthetic strategy toward furyl- and benzofuryl-containing building blocks for organic materials

Chimica Techno Acta, 2022
A synthetic approach to furyl- and benzofuryl-containing building blocks utilizing easily accessible substrates is reported. Cascade acid-catalyzed reactions of 2-methylfuran with α,β-unsaturated carbonyl compounds or salicyl alcohols followed by ...
Diana A. Eshmemet’eva, Danil K. Vshivkov, Yury A. Vasev, Danil A. Myasnikov   +3 more
doaj   +1 more source

High throughput synthesis of 2,5-substituted indoles using a titanium carbenoid bearing boronate functionality [PDF]

, 2008
A titanium benzylidene complex bearing a boronate group converted resin-bound esters into enol ethers. Suzuki cross-coupling with aryl iodides followed by cleavage with acid completed the solid-phase synthesis of 2,5-disubstituted N-Boc-indoles.
Hartley, R.C., Main, C.A., Petersson, H.M., Rahman, S.S.   +3 more
core   +1 more source

Strategies Toward Accessing Enantioenriched (Hetero)Benzo‐Fused 5‐ and 6‐ Membered Rings via Intermolecular Carbometalation

Angewandte Chemie, EarlyView.
The use of transition‐metal catalysts and design of chiral ligands have allowed chemists to access highly functionalized benzofused 5‐ and 6‐ membered rings in high yield and enantioselectivity. A common strategy used relies on an intermolecular carbometalation across alkynes and olefins, usually followed by a subsequent intramolecular carbometalation.
Clara Jans, Armaan Grewal, Xavier Abel‐Snape, Mark Lautens   +3 more
wiley   +2 more sources

5,6-Dihydro-2H-pyran-3(4H)-on als Baustein zur Synthese pyrananellierter Heterocyclen [PDF]

, 1984
Während 5,6-Dihydro-2H-pyran-3(4H)-on (3) sich mit ortho-substituierten Phenylcarbonylverbindungen nur in Einzelfällen regioselektiv zu pyrananellierten Heterocyclen umsetzt - z. B.
Eiden, Fritz, Wanner, Klaus Th.
core   +1 more source

Modulators of hepatic lipoprotein metabolism identified in a search for small-molecule inducers of tribbles pseudokinase 1 expression. [PDF]

PLoS ONE, 2015
Recent genome wide association studies have linked tribbles pseudokinase 1 (TRIB1) to the risk of coronary artery disease (CAD). Based on the observations that increased expression of TRIB1 reduces secretion of VLDL and is associated with lower plasma ...
Marek M Nagiec, Adam P Skepner, Joseph Negri, Michelle Eichhorn, Nicolas Kuperwasser, Eamon Comer, Giovanni Muncipinto, Aravind Subramanian, Clary Clish, Kiran Musunuru, Jeremy R Duvall, Michael Foley, Jose R Perez, Michelle A J Palmer   +13 more
doaj   +1 more source

2-(2-Methoxyphenyl)-1-benzofuran [PDF]

Acta Crystallographica Section E Structure Reports Online, 2011
In the title compound, C(15)H(12)O(2), the dihedral angle between the aromatic ring systems is 16.67 (6)°. The methyl C atom is almost coplanar with its attached benzene ring [displacement = 0.020 (2) Å]. In the crystal, the mol-ecules are connected by weak C-H⋯O bonds and face-to-edge C-H⋯π inter-actions between the 2-meth-oxy-phenyl rings.
Michaela Pojarová, Michal Dušek, Andrej Jančařík, Emanuel Makrlík, Zdeňka Sedláková   +4 more
openaire   +3 more sources