Results 21 to 30 of about 15,949 (256)

A straightforward approach towards combined α-amino and α-hydroxy acids based on Passerini reactions

open access: yesBeilstein Journal of Organic Chemistry, 2011
Complex amino acids with an α-acyloxycarbonyl functionality in the side chain are easily available through epoxide opening by chelated enolates and subsequent oxidation/Passerini reaction. This protocol works with both, aldehyde and ketone intermediates,
Ameer F. Zahoor   +2 more
doaj   +1 more source

Anti-bacterial screening and sequential synthesis of 1,2,3-triazoles ‎from alcohols and epoxides in water [PDF]

open access: yesشیمی کاربردی روز, 2017
The triazole core is an important part of the therapeutically drugs such as antimicrobial, analgesic and anti-inflammatory agents. Therefore, a facile synthesis of a series of 1,2,3-triazoles has been introduced by the sequential azidation of alcohols or
Mohammad Javaherian   +3 more
doaj   +1 more source

Recent Advances in Greener and Energy Efficient Alkene Epoxidation Processes

open access: yesEnergies, 2022
The chemical industry is considered to be one of the largest consumers of energy in the manufacturing sector. As the cost of energy is rising rapidly, coupled with the increasingly stringent standards for the release of harmful chemicals and gases into ...
Misbahu Ladan Mohammed, Basudeb Saha
doaj   +1 more source

Constraints on the Role of Laplace Pressure in Multiphase Reactions and Viscosity of Organic Aerosols

open access: yesGeophysical Research Letters, 2022
Aerosol chemistry has broad relevance for climate and global public health. The role of interfacial phenomena in condensed‐phase aerosol reactions remains poorly understood.
Sarah S. Petters
doaj   +1 more source

Valorization of CO2 through the Synthesis of Cyclic Carbonates Catalyzed by ZIFs

open access: yesMolecules, 2022
One way to exploit CO2 is to use it as a feedstock for the production of cyclic carbonates via its reaction with organic epoxides. As far as we know, there is still no heterogeneous catalyst that accelerates the reaction in a selective, efficient and ...
José J. Delgado-Marín   +5 more
doaj   +1 more source

Stereoselective Multicomponent Reactions in the Synthesis or Transformations of Epoxides and Aziridines

open access: yesMolecules, 2019
Small ring heterocycles, such as epoxides and aziridines, are present in several natural products and are also highly versatile building blocks, frequently involved in the synthesis of numerous bioactive products and pharmaceuticals.
Allan Ribeiro da Silva   +3 more
doaj   +1 more source

Nature-Derived Epoxy Resin Monomers with Reduced Sensitizing CapacityIsosorbide-Based Bis-Epoxides

open access: yes, 2023
Epoxy resin systems (ERSs) are a class of thermosetting resins that become thermostable and insoluble polymers upon curing. They are widely used as components of protective surfaces, adhesives, and paints and in the manufacturing of composites in the ...
Kristina Luthman (802421)   +17 more
core   +1 more source

NEW ROOM TEMPERATURE LIQUIDS: SYNTHESIS AND CHARACTERIZATION [PDF]

open access: yesChemistry Journal of Moldova: General, Industrial and Ecological Chemistry, 2007
Room temperature ionic liquids (ILs) have been recognized as a new generation of solvents for “green chemistry” and represent remarkably promising classes of technologically useful and fundamentally interesting materials [1-6].
Macaev Fliur   +4 more
doaj  

Synthesis of 2,5-Disubstituted Tetrahydrofurans by Stereospecific Elimination−Cyclization of 1-Iodomethyl-1,5-bis-epoxides

open access: yes, 2016
Treatment of 1-iodomethyl-1,5-bis-epoxides with zinc in refluxing ethanol affords cis or trans 2-vinyl-5-(1-hydroxyethy)-substituted tetrahydrofurans stereospecifically in high ...
James A. Marshall (2262808)   +1 more
core   +1 more source

Alkenes from β-lithiooxyphosphonium ylides generated by trapping α-lithiated terminal epoxides with triphenylphosphine

open access: yesBeilstein Journal of Organic Chemistry, 2012
Terminal epoxides undergo lithium 2,2,6,6-tetramethylpiperidide-induced α-lithiation and subsequent interception with Ph3P to provide a new and direct entry to β-lithiooxyphosphonium ylides.
David. M. Hodgson, Rosanne S. D. Persaud
doaj   +1 more source

Home - About - Disclaimer - Privacy