Results 1 to 10 of about 2,206 (129)

Fully Selective Synthesis of Spirocyclic-1,2-oxazine N-Oxides via Non-Catalysed Hetero Diels-Alder Reactions with the Participation of Cyanofunctionalysed Conjugated Nitroalkenes [PDF]

open access: goldMolecules, 2023
Hetero Diels-Alder (HDA) reactions with the participation of E-2-aryl-1-cyano-1-nitroethenes and methylenecyclopentane were evaluated on the basis of experimental as well as quantumchemical data.
Przemysław Woliński   +5 more
doaj   +2 more sources

Organocatalytic Asymmetric Conjugate Addition of Aldehydes to Maleimides and Nitroalkenes in Deep Eutectic Solvents [PDF]

open access: goldMolecules, 2019
A chiral primary amine-salicylamide is used as an organocatalyst for the enantioselective conjugate addition of α,α-disubstituted aldehydes to maleimides and nitroalkenes.
Alejandro Torregrosa-Chinillach   +3 more
doaj   +2 more sources

Organo-photocatalytic Synthesis of Functionalized Pyrroles from 2H-Azirines and α-Substituted Nitroalkenes [PDF]

open access: goldSynOpen, 2022
An efficient organo-photocatalytic method for the synthesis of tetrasubstituted pyrroles bearing a ketone, ester, alcohol, or nitro group at the 3-position has been developed.
Lalita Devi   +3 more
doaj   +2 more sources

Characterization and quantification of endogenous fatty acid nitroalkene metabolites in human urine[S] [PDF]

open access: hybridJournal of Lipid Research, 2013
The oxidation and nitration of unsaturated fatty acids transforms cell membrane and lipoprotein constituents into mediators that regulate signal transduction.
Sonia R. Salvatore   +7 more
doaj   +2 more sources

Recent Advances in Asymmetric Organocatalyzed Conjugate Additions to Nitroalkenes

open access: yesMolecules, 2017
The asymmetric conjugate addition of carbon and heteroatom nucleophiles to nitroalkenes is a very interesting tool for the construction of highly functionalized synthetic building blocks.
Diego A. Alonso   +6 more
doaj   +3 more sources

The Puzzle of the New Type of Intermediate in the Course of [2 + 2] Cycloaddition with the Participation of Conjugated Nitroalkenes: MEDT Computational Study [PDF]

open access: goldMolecules
The phenomena of regio- and stereoselectivity and the molecular mechanism of the [2 + 2] cycloaddition reaction between (E)-2-arylnitroethenes and the ynamine molecular system were analyzed using wb97xd/6-311 + G(d) (PCM) quantumchemical calculations. It
Radomir Jasiński, Agnieszka Kącka-Zych
doaj   +2 more sources

Imidazoline‐Proline and Imidazoline‐Prolinate Ligands for Copper‐Catalyzed Asymmetric Exo‐Selective [3 + 2] Cycloaddition of Iminoesters with Nitroalkenes

open access: yesChemistryEurope
Diphenylethylenediamine‐derived imidazoline‐amino acid derivatives are designed as nonphosphine chiral nitrogen ligands for metal‐catalyzed exo‐selective [3 + 2] cycloaddition reaction of iminoesters with nitroalkenes.
Yan Yu   +4 more
doaj   +2 more sources

Stereodivergent Access to Aliphatic Nitro Compounds Bearing Multi‐Contiguous Stereocenters via Sequential Catalysis

open access: yesAdvanced Science
Herein, we report a highly efficient synthesis of aliphatic nitro compounds bearing multi‐contiguous stereocenters in good yields (up to 72%) with excellent diastereo‐ and enantio‐selectivities (up to 12:1 dr, and >99% ee) by combining copper‐catalyzed ...
Jia‐Hao Xie   +4 more
doaj   +2 more sources

Synthesis of Amino-Acid-Based Nitroalkenes

open access: yesOrganics, 2022
Fatty-acid-based nitroalkenes have recently received great attention because of their bioactivities. On the contrary, peptide- or amino-acid-based nitroalkenes have been scarcely explored so far, although they may exhibit interesting biological ...
Velisaria-Eleni Gerogianni   +3 more
doaj   +1 more source

Iridium-Catalyzed and pH-Dependent Reductions of Nitroalkenes to Ketones

open access: yesMolecules, 2022
A highly chemoselective conversion of α,β-disubstituted nitroalkenes to ketones is developed. An acid-compatible iridium catalyst serves as the key to the conversion.
Tingting Wang   +4 more
doaj   +1 more source

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