Results 11 to 20 of about 55,888 (222)

Exploring Sesquiterpene Lactones from <i>Saussurea lappa</i>: Isolation, Structural Modifications, and Herbicide Bioassay Evaluation. [PDF]

open access: yesPlants (Basel)
Considering the resistance of weeds to different herbicides with different mechanisms of action, the search for new, more selective compounds with low toxicity to other species in nature has been very important for the development of agriculture. Because
Alvarenga ES   +4 more
europepmc   +2 more sources

Oxidation of cycloalkene using supported ruthenium catalysts under solvent-free conditions [PDF]

open access: yesChemical Industry and Chemical Engineering Quarterly, 2022
The present paper employs supported ruthenium nanoparticles alongside catalytic quantities of the radical initiator, which are proven to be capable of cyclooctene oxidation with green conditions, in the absence of solvent, with air as the main oxidant ...
Alsaiari Raiedhah Abdullah
doaj   +1 more source

Computational insights into the spontaneity of epoxide formation from halohydrins and other mechanistic details of Williamson’s ether synthesis

open access: yesChemistry Journal of Moldova: General, Industrial and Ecological Chemistry, 2023
The reaction mechanism of several Williamson‟s ether syntheses have been studied using density functional theory with triple-ζ basis sets. These computations show that the synthesis of geometrically-strained epoxide from deprotonated halohydrins is due ...
Pedro J. Silva
doaj   +1 more source

Si-Imidazole-HSO4 Functionalized Magnetic Fe3O4 Nanoparticles as an Efficient and Reusable Catalyst for the Regioselective Ring Opening of Epoxides in Water [PDF]

open access: yesNanochemistry Research, 2016
An efficient and simple method for the preparation of Si-Imidazole-HSO4 functionalized magnetic Fe3O4 nanoparticles (Si-Im-HSO4 MNPs) and used as an efficient and reusable magnetic catalysts for the regioselective ring opening of epoxides under green ...
Eshagh Rezaee Nezhad   +1 more
doaj   +1 more source

Study of metal acetylacetonates as catalyst in the reaction of CO2 and styrene oxide to produce styrene carbonate [PDF]

open access: yesشیمی کاربردی روز, 2021
Employing carbon dioxide as a renewable C1 building block in chemical reactions is attracting attentions in recent years. Reacting CO2 with high energy reagents such as H2 and epoxides in the presence of suitable catalysts is a strategy to overcome the ...
Masoumeh Taherimehr
doaj   +1 more source

Deep Eutectic Solvents as Catalysts for Cyclic Carbonates Synthesis from CO2 and Epoxides

open access: yesMolecules, 2022
In recent years, the chemical industry has put emphasis on designing or modifying chemical processes that would increasingly meet the requirements of the adopted proecological sustainable development strategy and the principles of green chemistry.
Dorota Mańka, Agnieszka Siewniak
doaj   +1 more source

Crystal structure of (1R,2S,4R,7R,8S,9R)-3,3-dichloro-8,9-epoxy-4,8,12,12-tetramethyltricyclo[5.5.0.02,4]dodecane

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2015
The title compound, C16H24Cl2O, is built up from two fused six- and seven-membered rings which bear a dichlorocyclopropane group and an epoxy group, respectively.
Ahmed Benzalim   +4 more
doaj   +1 more source

In situ epoxide generation by dimethyldioxirane oxidation and the use of epichlorohydrin in the flow synthesis of a library of β-amino alcohols [PDF]

open access: yesRoyal Society Open Science, 2018
The flow coupling of epichlorohydrin with substituted phenols, while efficient, limits the nature of the epoxide available for the development of focused libraries of β-amino alcohols.
Peter J. Cossar   +3 more
doaj   +1 more source

A Diastereoselective Synthetic Approach towards the Synthesis of Berkeleylactone F and Its 4-epi-Derivative

open access: yesSynOpen, 2020
A diastereoselective approach to the synthesis of berkeleylactone F is presented. The synthetic strategy is initiated with commercially available (R)-glycidol, 1,6-heptadiyne, and (R)-(+)-methyl lactate.
Srijana Subba   +2 more
doaj   +1 more source

Enantioselective Synthesis of 2,2-Disubstituted Terminal Epoxides via Catalytic Asymmetric Corey-Chaykovsky Epoxidation of Ketones

open access: yesMolecules, 2012
Catalytic asymmetric Corey-Chaykovsky epoxidation of various ketones with dimethyloxosulfonium methylide using a heterobimetallic La-Li3-BINOL complex (LLB) is described.
Shigeki Matsunaga   +3 more
doaj   +1 more source

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