Results 21 to 30 of about 2,940,757 (378)

Synthetic Studies on Bioactive Natural Polyketides: Intramolecular Nitrile Oxide-Olefin Cycloaddition Approach for Construction of a Macrolactone Skeleton of Macrosphelide B

open access: yesMolecules, 2011
Studies on the synthesis of macrosphelide B via an intramolecular nitrile oxide-olefin cycloaddition (INOC) is described. In particular, an asymmetric INOC approach using phase transfer catalysts seems to be a potentially efficient and versatile ...
Seung-Mann Paek, Young-Ger Suh
doaj   +2 more sources

Syntheses of Isoxazoline-Based Amino Acids by Cycloaddition of Nitrile Oxides and Their Conversion into Highly Functionalized Bioactive Amino Acid Derivatives [PDF]

open access: green, 2012
The present account illustrates the syntheses of isoxazoline- based amino acids by the cycloaddition of 1,3-dipolar nitrile oxides to the C–C double bond of unsaturated amino acid derivatives, with focus on the regio- and stereoselectivities of the ...
Fülöp, Ferenc   +2 more
core   +3 more sources

Unveiling Hydrogen Bonding and Solvent Effects on Directed Nitrile Oxide [3 + 2] Cycloaddition Reactions: Selectivity of 2,2-Dimethylpropane Nitrile Oxide with Cyclopentenylbenzamide: An MEDT Study [PDF]

open access: yesACS Omega
Sofiane Benmetir   +6 more
doaj   +2 more sources

A new approach to heterocycle-modified steroids via nitrile oxide intermediates

open access: diamondARKIVOC, 2008
Alexander V. Baranovsky   +3 more
doaj   +3 more sources

Synthesis of Functionalized 4,5-Dihydroisoxazoles Decorated with the Dimethylphosphinoyl Group

open access: yesЖурнал органічної та фармацевтичної хімії, 2023
Aim. To synthesize a hybrid molecular platform incorporating dimethylphosphinoyl and 4,5-dihydroisoxazole moieties suitable for the creation of focused combinatorial libraries of compounds. Results and discussion.
Andrii V. Fedyk, Bohdan A. Chalyk
doaj   +1 more source

The Theoretical Study on the Mechanism of [3+2] Cycloaddition Reactions between α,β-unsaturated Selenoaldehyde with Nitrone and with Nitrile Oxide

open access: yes, 2020
The reaction mechanisms of [3+2] cycloaddition (32CA) between the α,β-unsaturated selenoaldehyde with nitrone and nitrile oxide were investigated theoretically using the molecular electron density theory (MEDT). Selenoaldehyde has two unsaturations which
Haydar A. Mohammad-Salim   +3 more
semanticscholar   +1 more source

Reaction kinetics of CN + toluene and its implication on the productions of aromatic nitriles in the Taurus molecular cloud and Titan's atmosphere [PDF]

open access: yes, 2023
Reactions between cyano radical and aromatic hydrocarbons are believed to be important pathways for the formation of aromatic nitriles in the interstellar medium (ISM) including those identified in the Taurus molecular cloud (TMC-1). Aromatic nitriles might participate in the formation of polycyclic aromatic nitrogen containing hydrocarbons (PANHs) in ...
arxiv   +1 more source

A Weinreb Nitrile Oxide and Nitrone for Cycloaddition. [PDF]

open access: yesChemInform, 2004
AbstractFor Abstract see ChemInform Abstract in Full Text.
Richard W. Franck, Ajit K. Parhi
openaire   +4 more sources

Metal Catalysis Acting on Nitriles in Early Earth Hydrothermal Systems

open access: yesLife, 2023
Hydrothermal systems are areas in which heated fluids and organic molecules rush through basaltic material rich in metals and minerals. By studying malononitrile and acetonitrile, we examine the effects of metal and mineral nanoparticles on nitrile ...
Miranda Sturtz, Christopher House
doaj   +1 more source

Synthesis of Spiroisoxazolines by 1,3-Dipolar Cycloaddition

open access: yesMolecules, 1997
The cycloaddition of the chiral nitrile oxide 1 to 1-R-substituted 3,3-methylene-5,5-dimethyl-2-pyrrolidinones 2 (where R is H, n-butyl-, 1,1-dimethylethoxycarbonyl-, 1-methylethenyl- and acetyl-) proceeds regioselectively under the formation of ...
Peter Ertl   +3 more
doaj   +1 more source

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