Примери коришћења Electrophilic на Енглеском и њихови преводи на Српски
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Synthesis of benzene derivatives: electrophilic aromatic substitution.
These electrophilic groups react with amino acid side chains to form covalent adducts.
Toluene reacts as a normal aromatic hydrocarbon in electrophilic aromatic substitution.
Electrophilic reagents attack preferably at the Natom and at the b-C-atoms, while nucleophilic reagents prefer the a- and c-C-atoms.
Being aromatic it undergoes electrophilic substitution reactions at the -2 or -2,5 positions.
It has an antioxidant effect due to the presence of sulfhydryl groups(SH-groups) that can neutralize electrophilic oxidative toxins.
This nucleophile reacts with the electrophilic alkene 3 to form 4 in a conjugate addition reaction.
Due to their electron withdrawing effects,sulfonate protecting groups can be used to prevent electrophilic aromatic substitution.
The steric effect of tri-(tert-butyl)amine makes electrophilic reactions, like forming the tetraalkylammonium cation, difficult.
Examination of the resonance contributors shows the increased electron density of the ring,leading to increased rates of electrophilic substitution.
Addition reactions that proceed by a nucleophilic and electrophilic opening of the ring are the most general reaction class.
Electrophilic reactions to other unsaturated compounds than arenes generally lead to electrophilic addition rather than substitution.
However, experimental methods can be used while undertaking electrophilic substitution on pyridine N-oxide.
Electrophiles are involved in electrophilic substitution reactions and particularly in electrophilic aromatic substitutions.
The substitutions mainly happen at the three-position which is one of the electron-rich carbon atoms located in the ring making it prone to electrophilic addition.
The most reactive position on indole for electrophilic aromatic substitution is C3, which is 1013 times more reactive than benzene.
Electrophilic aromatic substitution or EAS is an organic reaction in which an atom, usually hydrogen, in an aromatic system is replaced by an electrophile….
Superelectrophiles are defined as cationic electrophilic reagents with greatly enhanced reactivities in the presence of superacids.
Electrophilic aromatic substitution is an organic reaction in which an atom that is attached to an aromatic system(usually hydrogen) is replaced by an electrophile.
This usually uses a prosthetic group or a coenzyme,forming electrophilic alpha and beta unsaturated carbonyl compounds and imines.
Second, he is describing electrophilic aromatic substitution, proceeding(third) through a Wheland intermediate, in which(fourth) the conjugation of the ring is broken.
The calculated pi-electron density marks C5 as the primary site for electrophilic substitution, and C2 as the site for nucleophilic substitution.
Aromatic sulfonation is an organic reaction in which a hydrogen atom on an arene is replaced by a sulfonic acid functional group in an electrophilic aromatic substitution.
The Grignard reagent functions as a nucleophile,attacking the electrophilic carbon atom that is present within the polar bond of a carbonyl group.
These reactions are catalysed by a large group of broad-specificity transferases,which in combination can metabolise almost any hydrophobic compound that contains nucleophilic or electrophilic groups.
The Grignard reagents function as a common nucleophile,attacking the electrophilic group such as the carbon atom that is present within the polar bond of a carbonyl group.
Typical conditions involve heating the aromatic compound with sulfuric acid: C6H6+ H2SO4→ C6H5SO3H+ H2O Sulfur trioxide orits protonated derivative is the actual electrophile in this electrophilic aromatic substitution.
Lipscomb investigated,"… the carboranes,C2B10H12, and the sites of electrophilic attack on these compounds[14] using nuclear magnetic resonance(NMR) spectroscopy.
A particularly large scale application of this method is the production of alkylbenzenesulfonic acids: RC6H5+ SO3→ RC6H4SO3H In this reaction, sulfur trioxide is an electrophile andthe arene undergoes electrophilic aromatic substitution.
Its antioxidant properties can be expressed quantitatively as a redox potential: I-⇌ 1⁄2 I2+ e- E°=- 0.54 volts(versus SHE) Because iodide is easily oxidized,some enzymes readily convert it into electrophilic iodinating agents, as required for the biosynthesis of myriad iodide-containing natural products.