Results 1 to 10 of about 580,019 (132)

Investigation of cold-formed steel top-hat sections under bending [PDF]

, 2013
In recent years, with the introduction of higher strength grades, cold-formed steel sections have become increasingly more slender. As a result, top-hat purlin sections have become an alternative to conventional zed purlins, particularly when smaller ...
Uzzaman, Asraf, Wrzesien, A.M., Lim, JBP, Hamilton, Robert, Nash, David   +4 more
core   +3 more sources

TBADT‐Mediated C‐C Bond Formation Exploiting Aryl Aldehydes in a Photochemical Flow Reactor

ChemCatChem, Volume 15, Issue 2, January 20, 2023., 2023
Scaled Photochemical Reactions: A continuous flow approach for the photochemical synthesis of β‐ketonitriles and related species is presented. This approach tolerates (hetero)aromatic substrates and uses readily available TBADT as an effective HAT catalyst reaching throughputs of up to 41 mmol/h.
Adam Cruise, Marcus Baumann
wiley   +1 more source

Foto‐Induzierte Ruthenium‐Katalysierte Doppel C(sp2)−H/C(sp3)−H Funktionalisierungen durch Radikalübertragungen

Angewandte Chemie, Volume 134, Issue 32, August 8, 2022., 2022
Die Ruthenium‐katalysierten doppelten distalen C(sp2)−H/C(sp3)−H‐Funktionalisierungen über Radikalübertragungen wurden durch milde Photokatalyse mit sichtbarem Licht ohne exogenen Photokatalysator erreicht, wobei meta‐Aren‐ und Wasserstoffatomtransfer (HAT)‐Funktionalisierungen mit einem einzigen Katalysator gezeigt wurden.
Yulei Wang, Shan Chen, Xinran Chen, Agnese Zangarelli, Lutz Ackermann   +4 more
wiley   +1 more source

SET and HAT/PCET acid‐mediated oxidation processes in helical shaped fused bis‐phenothiazines

ChemPhysChem, Volume 22, Issue 14, Page 1446-1454, July 16, 2021., 2021
Oxidation of differently substituted thia[4]helicenes: Single electron transfer and/or hydrogen atom transfer/proton‐coupled electron transfer processes operative on helical shaped fused bis‐phenothiazines are measured and studied rationalizing the role of substitution pattern and medium pH on the formation of Hel•+ radical cations and/or HelO ...
Riccardo Amorati, Luca Valgimigli, Andrea Baschieri, Yafang Guo, Fabio Mollica, Stefano Menichetti, Michela Lupi, Caterina Viglianisi   +7 more
wiley   +1 more source

Selectfluor® Radical Dication (TEDA2+.) – A Versatile Species in Modern Synthetic Organic Chemistry

Asian Journal of Organic Chemistry, Volume 9, Issue 7, Page 992-1007, July 2020., 2020
Photochemistry: This review aims to highlight recent progress on the applications of Selectfluor®‐derived radical dication TEDA2+. in synthetic organic chemistry. This species offers distinct and diverse reactivity patterns that can be exploited to promote the formation of a wide range of C–heteroatom and C−C bonds via radical processes.
Francisco José Aguilar Troyano, Kay Merkens, Adrián Gómez‐Suárez   +2 more
wiley   +1 more source

Cross‐Coupling of Gaseous Alkanes with (Hetero)Aryl Bromides via Dual Nickel/Photoredox Catalysis

Angewandte Chemie, Volume 137, Issue 2, January 10, 2025.
A catalytic methodology for the direct cross‐coupling of gaseous alkanes with (hetero)aryl bromides through the combination of metallaphotoredox‐mediated hydrogen atom transfer and nickel catalysis is reported. The method provides an efficient platform for the conversion of these abundant chemical feedstocks into high‐value alkyl(hetero)arenes and ...
Akshay M. Nair, Pol Martínez‐Balart, Sergio Barbeira‐Arán, Martín Fañanás‐Mastral   +3 more
wiley   +2 more sources

Site‐Selective B─H Activation via HAT Toward Xanthyl‐closo‐Carboranes as Bench‐Stable Precursors of Organosulfur Boron Clusters

Angewandte Chemie International Edition, Volume 65, Issue 24, 8 June 2026.
A light mediated direct regioselective B─H functionalization, via hydrogen atom transfer (HAT), is described. Unexplored xanthyl‐closo‐carboranes as novel bench‐stable and versatile platforms to access sulfur‐containing boron clusters are reported for the first time.
Marco Rusconi, Eugenia Magi, Polyssena Renzi, Emanuele Azzi, Valeria Lagostina, Enrico Salvadori, Mario Chiesa, Birgit Hischa, Giovanni Ghigo, Annamaria Deagostino   +9 more
wiley   +1 more source

Global mapping of the regulatory interactions of histone residues

FEBS Letters, Volume 589, Issue 24PartB, Page 4061-4070, December 21, 2015., 2015
Histone residues can serve as platforms for specific regulatory function. Here we constructed a map of regulatory associations between histone residues and a wide spectrum of chromatin regulation factors based on gene expression changes by histone point mutations in Saccharomyces cerevisiae.
Inkyung Jung, Jungmin Seo, Heun-Sik Lee, Lawrence W. Stanton, Dongsup Kim, Jung Kyoon Choi   +5 more
wiley   +1 more source

Copper Joins the Monoelectronic Game: Leveraging the CuI Potential for SET‐, XAT‐, and HAT‐Driven Catalytic Organic Synthesis

ChemCatChem, Volume 18, Issue 11, 15 June 2026.
This review surveys the emerging role of copper(I) catalysis in sustainable synthesis, highlighting its exceptional capacity for monoelectronic processes. By examining the strategies based on electron, halogen, and hydrogen transfer processes (SET, XAT, and HAT, respectively), we outline key reactivity trends, design principles, and the synthetic ...
Antonio Torres‐Calis, Juventino J. García   +1 more
wiley   +1 more source

Environmental regulation of the neural epigenome

FEBS Letters, Volume 585, Issue 13, Page 2049-2058, July 07, 2011., 2011
Parental effects are a major source of phenotypic plasticity. Moreover, there is evidence from studies with a wide range of species that the relevant parental signals are influenced by the quality of the parental environment. The link between the quality of the environment and the nature of the parental signal is consistent with the idea that parental ...
Christian Caldji, Ian C. Hellstrom, Tie-Yuan Zhang, Josie Diorio, Michael J. Meaney   +4 more
wiley   +1 more source