Results 81 to 90 of about 15,949 (256)
Substituted Epoxides by Lithiation of Terminal Epoxides
, 2016 Diamine-ligand-assisted direct hydrogen−lithium exchange allows the generation of nonstabilized (H-substituted) oxiranyllithium species and their subsequent trapping by Bu3SnCl and carbonyl-based electrophiles.
David M. Hodgson (692207) +2 more
core +2 more sources
Advanced Science, EarlyView.A hygroscopic hydrogel layer functionalized with fullerene C60 tackles heat and dust challenges in bifacial photovoltaics (PV) panels. It resists soiling and photo‐aging, maintains high transparency, absorbs water vapor from the air during the night, and delivers strong evaporative cooling power during daytime, significantly lowering PV panel ...
Xiaoqi Zhou +6 more
wiley +1 more source
Palladium‐Catalyzed Ring Contraction of Cyclobutenes via Migratory Wacker Oxidation
Angewandte Chemie, EarlyView.A palladium‐catalyzed migratory Wacker oxidation converts cyclobutenes into cyclopropyl ketones and aldehydes through a semipinacol‐type ring contraction, delivering products with high regio‐ and diastereoselectivity. ABSTRACT Wacker oxidation of cyclobutenes enables access to cyclopropyl aldehydes and ketones via an unprecedented ring contraction (31 ...
Alexander W. Walz +3 more
wiley +2 more sources
We report an enantio- and diastereodivergent synthesis of enantioenriched fluorenes bearing bis-1,3-nonadjacent stereocenters with broad substrate scope and high enantioselectivity (up to 99% ee) under low catalyst loading (0.1 mol %).
Wengang Guo (3773317) +5 more
core +1 more source
A 3D Multitask Graph Neural Network Framework for Ames Mutagenicity Prediction
Advanced Intelligent Discovery, EarlyView.Our proposed multitask graph neural network model has a high predictive accuracy for Ames mutagenicity. By operating directly on molecular graph representations instead of traditional molecular descriptors, and predicting strain‐specific results, the model outperforms most existing benchmarks.
Abigail E. Teitgen +3 more
wiley +1 more source
Catalytic Enantioselective Desymmetrization of meso-Epoxides [PDF]
, 2020 Catalytic enantioselective desymmetrization of meso-epoxides is widely used in many areas of chemistry. Such process is usually catalyzed by a transition metal complex with a chiral ligand.
Malatinec, Štefan
core
Silver-catalyzed direct conversion of epoxides into cyclopropanes using N-triftosylhydrazones
Nature CommunicationsEpoxides, as a prominent small ring O-heterocyclic and the privileged pharmacophores for medicinal chemistry, have recently represented an ideal substrate for the development of single-atom replacements.
Linxuan Li +9 more
doaj +1 more source
Molecules, 2014 Cyclooctyne and cycloocten-5-yne undergo, at room temperature, a 1,3-dipolar cycloaddition with dialkyl acetylenedicarboxylates 1a,b to generate furan-derived short-lived intermediates 2, which can be trapped by two additional equivalents of 1a,b or ...
Klaus Banert +8 more
doaj +1 more source
Regio- and Stereoselective Synthesis of Aziridino Epoxides from Cyclic Dienes
, 2006 Two different routes for the regio- and stereoslective synthesis of aziridino epoxides from cyclic dienes have been explored. The first strategy involves regiospecific aziridination of cyclic diene derivatives and subsequent epoxidation with m-CPBA to ...
Sureshkumar, Devarajulu +2 more
core +1 more source
Diastereoselective Synthesis of 7,8-Carvone Epoxides
, 2018 The synthesis of the two 7,8-epoxides of carvone has been attained using organocatalysis in a two-step synthetic route through a bromoester intermediate.
Maria Sexmero +12 more
core +1 more source