Results 21 to 30 of about 1,728 (205)

Facile Synthesis of 2H-Benzo[h]Chromenes via an Arylamine-Catalyzed Mannich Cyclization Cascade Reaction

open access: yesMolecules, 2021
A simple arylamine-catalyzed Mannich-cyclization cascade reaction was developed for facile synthesis of substituted 2H-benzo[h]chromenes. The notable feature of the process included the efficient generation of ortho-quinone methides (o-QMs) catalyzed by ...
Yueteng Zhang   +5 more
doaj   +1 more source

An Enantioselective Alkene Aminoarylation to Form Chiral Indolines via Electrostatically‐Directed Palladium Catalysis

open access: yesAngewandte Chemie, EarlyView.
Enantioselective aminoarylation of ortho‐allyl anilines is achieved under mild conditions. Key to success is the electrostatically‐directed nature of the key aminopalladation step, achieved by using the sulfonated chiral ligand sSPhos on palladium. A detailed study of electronic trends allows tuning of the sulfonamide protecting group to enable good ...
Max Kadarauch   +4 more
wiley   +2 more sources

Incredible Role of Glycerol in Multicomponent Synthesis of 2,3-Dihydroquinazoline-4(1H)-ones and 1-Amidoalkyl-2-naphthols

open access: yesCroatica Chemica Acta, 2015
An efficient and green synthesis of 1-amidoalkyl-2-naphthols via one-pot three-component condensation of aromatic aldehydes, acetamide and 2-naphthol in the presence of catalytic amounts of glycerosulfonic acid in glycerol as a green solvent was ...
Maryam Hajjami   +2 more
doaj   +1 more source

A Simple and Effective Protocol for the Pechmann Reaction to Obtain 4-Methylcoumarin Derivatives Using a High-Speed Mixer Ball Mill Process

open access: yesChemistry, 2023
We hereby report a simple and efficient method for the preparation of 4-methylcoumarins series, including Coumarin 120 (7-amino-4-methylcoumarin) from phenols (or naphthols) and ethyl acetoacetate in the presence of 3 mol% InCl3.
Silvia J. Becerra-Anaya   +2 more
doaj   +1 more source

Transition-Metal-Free [3+2] Dehydration Cycloaddition of Donor-Acceptor Cyclopropanes With 2-Naphthols

open access: yesFrontiers in Chemistry, 2021
A Brønsted acid-catalyzed domino ring-opening cyclization transformation of donor-acceptor (D-A) cyclopropanes and 2-naphthols has been developed.
Hua Zhao   +4 more
doaj   +1 more source

Three-component domino reaction in Triton B: A facile synthesis of 4H-chromene derivatives

open access: yesResults in Chemistry, 2023
Herein, we report an unprecedented one-pot domino synthesis of indole- or naphthol-tethered biologically relevant 4H-chromene derivatives from readily accessible salicylaldehydes, malononitrile, and indoles/β-naphthols employing efficient, inexpensive ...
Mrinal Talukdar   +2 more
doaj   +1 more source

UCHL3 Regulates Subgenomic Flaviviral RNA Condensates to Promote Virus Propagation

open access: yesAdvanced Science, EarlyView.
ABSTRACT Flavivirus subgenomic RNAs (sfRNAs) antagonise antiviral defences, yet how sfRNAs are organized and maintained in cells remains poorly understood. Here we identify ubiquitin C‐terminal hydrolase L3 (UCHL3) as a post‐translational regulator of flavivirus sfRNA stability and function.
Oscar Trejo‐Cerro   +7 more
wiley   +1 more source

Pulsed and Cyclic Voltammetric Studies of Phenols and Naphthols in Dimethylformamide in Presence of Sodium 4-Vinylbenzenesulfonate

open access: yesChemistry
The influence of sodium 4-vinylbenzenesulfonate on the electrooxidation of phenols and naphthols was studied in dimethylformamide (DMF). The usually observed deactivation of phenol in non-aqueous environments was suppressed upon addition of sodium 4 ...
László Kiss, András Kiss
doaj   +1 more source

Chiral phosphoric acid catalyzed aminative dearomatization of α-naphthols/Michael addition sequence

open access: yesNature Communications, 2019
Catalytic asymmetric dearomatization (CADA) reactions readily convert common aromatic compounds to diverse 3D chiral, polycyclic molecules. Here, the authors report an intermolecular asymmetric dearomatization of nucleophile-tethered α-naphthols ...
Zi-Lei Xia   +3 more
doaj   +1 more source

Chiral‐Induced Spin Selectivity Effect in a 1 nm Thin 1,1′‐Binaphthyl‐2,2′‐diyl Hydrogenphosphate Self‐Assembled Monolayer on Nickel Oxide

open access: yesAdvanced Science, EarlyView.
A self‐assembled monolayer (≈0.9 nm) of an axially chiral binaphthol phosphoric acid derivative on a ferromagnetic Ni/NiOx substrate shows chiral‐induced spin selectivity (CISS) magnetoresistance of 50%–80%. This thermally and chemically robust functional stack shows the way towards practical spintronic devices based on the CISS effect.
Abin Nas Nalakath   +8 more
wiley   +1 more source

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