Results 41 to 50 of about 748,226 (258)

Decarboxylative sp3 C–N Coupling via Dual Copper/Photoredox Catalysis

open access: yes, 2018
Over the last three decades, significant progress has been made in the development of methods to construct sp2 C–N bonds using palladium, copper, or nickel catalysis. However, the incorporation of alkyl substrates to form sp3 C–N bonds remains one of the
David, W. C. MacMillan   +2 more
core   +1 more source

Ni/Photoredox-Catalyzed C(sp3)−C(sp3) Coupling between Aziridines and Acetals as Alcohol-Derived Alkyl Radical Precursors

open access: yes, 2022
Aziridines are readily available C(sp3) precursors that afford valuable β-functionalized amines upon ring-opening. In this article, we report a Ni/photoredox methodology for C(sp3)−C(sp3) cross-coupling between aziridines and me-thyl/1⁰/2⁰ aliphatic ...
Sun, Dongbang, Abigail, Doyle
core   +1 more source

Dietary Protein Intake and Peritoneal Protein Losses in Peritoneal Dialysis Patients

open access: yesTherapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Introduction Peritoneal dialysis (PD) patients lose protein in their waste dialysate, potentially increasing their risk for malnutrition. We wished to determine whether there was any association between losses and dietary protein intake (DPI). Methods DPI was assessed from 24‐h dietary recall using Nutrics software.
Haalah Shaaker, Andrew Davenport
wiley   +1 more source

Conformational dependence of through-space tellurium-tellurium spin-spin coupling in peri-substituted bis(tellurides)

open access: yes, 2015
The work in this project was supported by the Engineering and Physical Sciences Research Council (EPSRC). M.B. wishes to thank EaStCHEM and the University of St Andrews for support.Three related series of peri‐substituted bis(tellurides) bearing ...
Diamond, Louise M.   +16 more
core   +1 more source

C-C Coupling Reactions between Benzofurazan Derivatives and 1,3-Diaminobenzenes

open access: yesMolecules, 2017
Aromatic substitution reactions between 1,3-diaminobenzene and chloronitrobenzofurazan derivatives have never been reported so far. The aim of the current study was to synthesize novel electron-donor and -acceptor architectures of interest in applied ...
Gabriele Micheletti   +3 more
doaj   +1 more source

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

open access: yesFEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho   +3 more
wiley   +1 more source

Intramolecular Oxidative Coupling between Unactivated Aliphatic C-H and Aryl C-H Bonds

open access: yes, 2020
Direct oxidative coupling of different inert C-H bonds is the most straightforward and environmentally benign method to construct C-C bonds. In this article, we developed a Pd-catalyzed intramolecular oxidative coupling between unactivated aliphatic and ...
Yi, Zhou   +5 more
core   +1 more source

A chemoselective polarity-mismatched photocatalytic C(sp3)–C(sp2) cross-coupling enabled by synergistic boron activation

open access: yes, 2023
We report the development of a C(sp3)–C(sp2) coupling reaction using styrene boronic acids and redox-active esters under photoredox catalysis. The reaction proceeds through an unusual polarity-mismatched radical addition mechanism that is or-thogonal to ...
Allan, Watson   +2 more
core   +1 more source

Exploration of C–H and N–H-bond functionalization towards 1-(1,2-diarylindol-3-yl)tetrahydroisoquinolines

open access: yesBeilstein Journal of Organic Chemistry, 2014
The synthesis of 1,2,3-trisubstituted indoles was investigated. More specifically, straightforward synthetic routes towards 1-(1,2-diarylindol-3-yl)-N-PG-THIQs (PG = protecting group, THIQ = tetrahydroisoquinoline) employing transition metal-catalyzed C ...
Michael Ghobrial   +2 more
doaj   +1 more source

Computational exploration of the reaction mechanism of the Cu+-catalysed synthesis of indoles from N-aryl enaminones [PDF]

open access: yesRoyal Society Open Science, 2016
We have studied the role of Cu+-phenantroline as a catalyst in the cyclization of N-aryl-enaminones using density-functional theory computations. The catalyst was found to bind the substrate upon deprotonation of its eneaminone, and to dramatically ...
Carlos E. P. Bernardo, Pedro J. Silva
doaj   +1 more source

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