Results 1 to 10 of about 30,863 (282)

Diastereo- and enantioselective preparation of cyclopropanol derivatives

Beilstein Journal of Organic Chemistry, 2019
The diastereoselective carbocupration reaction of alkoxy-functionalized cyclopropene derivatives, followed by a subsequent trapping of the resulting cyclopropylmetal species with an electrophilic source of oxygen (oxenoid) afforded various ...
Marwan Simaan, Ilan Marek
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Palladium-catalyzed regio- and stereoselective alkoxycarbonylation of unsymmetrical internal alkynes toward α, β-unsaturated succinates

Tetrahedron Chem, 2022
Succinates play a vital role in industry, pharmaceutics, beverage, and cosmetics. A regio- and stereoselective alkoxycarbonylation of unsymmetrical internal alkynes with alcohols or phenols toward α, β-unsaturated succinates enabled by palladium ...
Chang-Sheng Kuai, Bing-Hong Teng, Yingying Zhao, Xiao-Feng Wu   +3 more
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(Z)-Selective Takai olefination of salicylaldehydes

Beilstein Journal of Organic Chemistry, 2017
The Takai olefination (or Takai reaction) is a method for the conversion of aldehydes to vinyl iodides, and has seen widespread implementation in organic synthesis. The reaction is usually noted for its high (E)-selectivity; however, herein we report the
Stephen M. Geddis, Caroline E. Hagerman, Warren R. J. D. Galloway, Hannah F. Sore, Jonathan M. Goodman, David R. Spring   +5 more
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Theoretical Study of the [4+2] Cycloaddition Reaction of Trifluoroethylene with Five-membered Chalcogens Heterocyclic Compounds

ARO-The Scientific Journal of Koya University, 2019
[4+2] cycloaddition reaction has enormous significant in organic chemistry synthesis reactions and yet remains unexplored for the synthesis of fluorine-containing compounds.
Haydar A. Mohammad-Salim, Hassan H. Abdallah   +1 more
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Synthesis of Novel N-Heterocyclic Compounds Containing 1,2,3-Triazole Ring System via Domino, “Click” and RDA Reactions

Molecules, 2019
An uncomplicated, high-yielding synthetic route has been developed to constitute complicated heterocycles, applying domino, click and retro-Diels⁻Alder (RDA) reaction sequences.
Márta Palkó, Mohamed El Haimer, Zsanett Kormányos, Ferenc Fülöp   +3 more
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Stereosopecificity in [Co(sep)][Co(edta)]Cl₂·2H₂O

Chemistry, 2021
The X-ray structure of racemic [Co(sep)][Co(edta)]Cl2·2H2O is reported and reveals hetero-chiral stereospecificity in the interactions of [Co(sep)]3+ with [Co(edta)]−.
Peter Osvath, Allen Oliver, A. Graham Lappin   +2 more
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Evolutionary insights into the stereoselectivity of imine reductases based on ancestral sequence reconstruction

Nature Communications
The stereoselectivity of enzymes plays a central role in asymmetric biocatalytic reactions, but there remains a dearth of evolution-driven biochemistry studies investigating the evolutionary trajectory of this vital property. Imine reductases (IREDs) are
Xin-Xin Zhu, Wen-Qing Zheng, Zi-Wei Xia, Xin-Ru Chen, Tian Jin, Xu-Wei Ding, Fei-Fei Chen, Qi Chen, Jian-He Xu, Xu-Dong Kong, Gao-Wei Zheng   +10 more
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Chiral Recognition of Flexible Melatonin Receptor Ligands Induced by Conformational Equilibria

Molecules, 2020
N-anilinoethylamides are a class of melatoninergic agents with the aniline portion mimicking the indole ring of the natural ligand and the ethylamide chain reproducing that of melatonin.
Gian Marco Elisi, Annalida Bedini, Laura Scalvini, Caterina Carmi, Silvia Bartolucci, Valeria Lucini, Francesco Scaglione, Marco Mor, Silvia Rivara, Gilberto Spadoni   +9 more
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Housing Molecularly Imprinted Polymer Nanoparticles in Polyvinylpyrrolidone/Multiwall Carbon Nanotube Nanofibers to Detect Chiral Terpene Vapors

Proceedings
This study proposes a two-step process to design a chiral sensor combining MIP (molecularly imprinted polymer) and electrospinning technologies. First, stereoselective S(-)-limonene molecularly imprinted polymer nanoparticles (MINPs) were fabricated and ...
Fabricio N. Molinari, Fabrizio De Cesare, Antonella Macagnano   +2 more
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Electrophilic Selenium Catalysis with Electrophilic N-F Reagents as the Oxidants

Molecules, 2017
A suitable oxidative system is crucial to electrophilic selenium catalysis (ESC). This short review offers the overview of recent development in ESC with electrophilic N-F reagents as the oxidants. Several highly selective transformations of alkenes such
Ruizhi Guo, Lihao Liao, Xiaodan Zhao
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