Results 181 to 190 of about 286,921 (352)

Electrocatalytic Dehydrogenative Lactonization of Benzylic Alcohols: A Sustainable Access to Phthalides via N‐hydroxyphthalimide Mediation

open access: yesAdvanced Synthesis &Catalysis, EarlyView.
A mild, scalable electrocatalytic method for direct lactonization of benzylic alcohols to phthalides using N‐hydroxyphthalimide as a redox mediator is reported. This metal‐free process proceeds via a phthalimide‐N‐oxyl‐mediated hydrogen atom transfer mechanism, shows broad scope with good to excellent yields, and enables late‐stage functionalizations ...
Pietro Ronco   +6 more
wiley   +1 more source

Installation of Trifluoromethylated Quaternary Carbon Stereocenters via Asymmetric Epoxidation of Tetrasubstituted Alkenes

open access: yesAdvanced Synthesis &Catalysis, EarlyView.
The catalytic enantioselective epoxidation of acyclic tetrasubstituted alkenes, bearing a trifluoromethyl group, is reported. In the presence of Takemoto's thiourea organocatalyst and tert‐butyl hydroperoxide, epoxides are obtained with excellent yield and good to high enantioselectivity.
Vincenzo Battaglia   +4 more
wiley   +1 more source

Cu(I)‐Catalyzed Interrupted Cycloaddition Between Azides, Ag(I)‐Acetylides, and Diorganoyl Dichalcogenides

open access: yesAdvanced Synthesis &Catalysis, EarlyView.
Unleashing the power of Ag(I)‐acetylides with LiCl/dimethyl sulfoxide (DMSO). The LiCl/DMSO mixture have an unexplored ability to dramatically increase the solubility of Ag(I)‐acetylides regardless of their molecular structure, which is explored to achieve high chemoselectivity in the Cu(I)‐catalyzed interrupted cycloaddition between organic azides, Ag(
Diego Seckler   +8 more
wiley   +1 more source

Development of f‐ELISA Sensors with Ultrahigh Sensitivity for On‐Site Colorimetric Detection of Fentanyl and Norfentanyl

open access: yesAdvanced Sensor Research, EarlyView.
A foam‐based ELISA (f‐ELISA) platform was developed using chemically modified melamine foam to enable rapid, ultrasensitive, and selective colorimetric detection of fentanyl and norfentanyl. Abstract Rapid and accurate detection of fentanyl in unknown products and aqueous samples can find the unexpected existence of the toxic chemical and assist law ...
Makela Norwood, Bofeng Pan, Gang Sun
wiley   +1 more source

A Polyoxometalate—Carbon Nanotube Enhanced Electrochemical Sensor for Aptamer‐Based Diagnostics

open access: yesAdvanced Sensor Research, EarlyView.
The high electroactive surface area of multi‐walled carbon nanotubes decorated with aptamer‐functionalized polyoxovanadate units enables a ≈1000‐fold increase in peak current response for a model diclofenac detection in aqueous solution compared to unmodified platinum microelectrodes.
Eric Vogelsberg   +2 more
wiley   +1 more source

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