Results 21 to 30 of about 55,888 (222)

Organocatalyzed enantioselective desymmetrization of aziridines and epoxides

open access: yesBeilstein Journal of Organic Chemistry, 2013
Enantioselective desymmetrization of meso-aziridines and meso-epoxides with various nucleophiles by organocatalysis has emerged as a cutting-edge approach in recent years.
Ping-An Wang
doaj   +1 more source

Gold Nanoparticle-Catalyzed Environmentally Benign Deoxygenation of Epoxides to Alkenes

open access: yesMolecules, 2011
We have developed a highly efficient and green catalytic deoxygenation of epoxides to alkenes using gold nanoparticles (NPs) supported on hydrotalcite [HT: Mg6Al2CO3(OH)16] (Au/HT) with alcohols, CO/H2O or H2 as the reducing reagent.
Kiyotomi Kaneda   +4 more
doaj   +1 more source

Synthesis of Pluri-Functional Amine Hardeners from Bio-Based Aromatic Aldehydes for Epoxy Amine Thermosets

open access: yesMolecules, 2019
Most of the current amine hardeners are petro-sourced and only a few studies have focused on the research of bio-based substitutes. Hence, in an eco-friendly context, our team proposed the design of bio-based amine monomers with aromatic structures. This
Anne-Sophie Mora   +4 more
doaj   +1 more source

The Ability of NCP@POCl2-x Core-Shell Magnetic Nano-Catalyst for Simultaneous Conversion of Epoxides into Cyanohydrin and α,β-Unsaturated Carboxylic Acid [PDF]

open access: yesJournal of Optoelectronical Nanostructures
: This paper presents a new environmental, and remarkably efficient heterogeneous magnetic nanocomposite, NCP@POCl2-x (Fe3O4@SiO2@CS@POCl2-x), designed for the regioselective production of cyanide compounds from epoxides using NaCN, subsequently ...
Farzaneh Ebrahimzadeh
doaj   +1 more source

One-pot synthesis of epoxides from benzyl alcohols and aldehydes

open access: yesBeilstein Journal of Organic Chemistry, 2018
A one-pot synthesis of epoxides from commercially available benzyl alcohols and aldehydes is described. The reaction proceeds through in situ generation of sulfonium salts from benzyl alcohols and their subsequent deprotonation for use in Corey ...
Edwin Alfonzo   +2 more
doaj   +1 more source

Unexpected Formation of Oxetanes during the Synthesis of Dodeco-6,7-diuloses

open access: yesMolbank, 2020
During the synthesis of symmetrical dodeco-6,7-diuloses that are potential candidates for inhibition of glycosidases, an unanticipated epoxide-oxetane rearrangement was observed.
Marius Bayer   +2 more
doaj   +1 more source

Aspochalasin H1: A New Cyclic Aspochalasin from Hawaiian Plant-Associated Endophytic Fungus Aspergillus sp. FT1307

open access: yesMolecules, 2021
Aspergillus is one of the most diverse genera, and it is chemically profound and known to produce many biologically active secondary metabolites. In the present study, a new aspochalasin H1 (1), together with nine known compounds (2–10), were isolated ...
Mallique Qader   +5 more
doaj   +1 more source

SYNTHESIS OF PINONIC ACID NEW DERIVATIVES [PDF]

open access: yesChemistry Journal of Moldova: General, Industrial and Ecological Chemistry, 2008
The method for synthetising new derivatives of the pinonic acid using, at the key step, the reaction of condensation with epichlorohydrin, has been elaborated.
Alexandru Gudima   +2 more
doaj  

Water and Aqueous Mixtures as Convenient Alternative Media for Organoselenium Chemistry

open access: yesMolecules, 2016
Even if water is the natural environment for bioorganic reactions, its use in organic chemistry is often severely limited by the high insolubility of the organic derivatives.
Claudio Santi   +5 more
doaj   +1 more source

Azetidine synthesis by La(OTf)3-catalyzed intramolecular regioselective aminolysis of cis-3,4-epoxy amines

open access: yesFrontiers in Chemistry, 2023
Azetidine is a prevalent structural motif found in various biologically active compounds. In this research paper, we report La(OTf)3-catalyzed intramolecular regioselective aminolysis of cis-3,4-epoxy amines to afford azetidines.
Yuse Kuriyama   +2 more
doaj   +1 more source

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