Information om | Engelska ordet HALOGENATION

Exempel på hur man kan använda HALOGENATION i en mening

• Several pathways exist for the halogenation of organic compounds, including free radical halogenation, ketone halogenation, electrophilic halogenation, and halogen addition reaction.
• The most important reactions of this type that take place are aromatic nitration, aromatic halogenation, aromatic sulfonation and acylation and alkylating Friedel-Crafts reactions.
• For related reasons, benzylic substituents exhibit enhanced reactivity, as in oxidation, free radical halogenation, or hydrogenolysis.
• Pyrene undergoes a series of hydrogenation reactions and is susceptible to halogenation, Diels-Alder additions, and nitration, all with varying degrees of selectivity.
• Subsequent halogenation (which usually cannot be stopped by control of stoichiometry) occurs at the position which already has a halogen substituent, until all hydrogens have been replaced by halogen atoms.
• Although acyl bromides are rarely made in comparison with acyl chlorides, they are used as intermediates in Hell-Volhard-Zelinsky halogenation.
• The Sandmeyer reaction provides a method through which one can perform unique transformations on benzene, such as halogenation, cyanation, trifluoromethylation, and hydroxylation.
• Nitrosyl fluoride is typically produced by direct reaction of nitric oxide and fluorine, although halogenation with a perfluorinated metal salt is also possible.
• After the oxidation, which is normally done with a peroxy acid, halogenation is done under basic conditions by use of dibromodifluoromethane for the halogen transfer step.
• There were several molecular modifications done to create clocortolone pivalate, including beta-hydroxylation at C-11, methylation at C-16, double bonds at C-12, esterification at C-21, and halogenation at C-6 and C-9.
• Halogen cyanides can be obtained by the reaction of halogens with metal cyanides or the halogenation of hydrocyanic acid.
• The heme-containing chloroperoxidase (CPO) exhibits peroxidase, catalase and cytochrome P450-like activities in addition to catalyzing halogenation reactions.
• The compound undergoes reactions typical of other phenyl rings, including hydroxylation, nitration, halogenation, sulfonation, and Friedel–Crafts alkylation or acylation.
• Other reactions named after him include the Darzens tetralin synthesis, Darzens halogenation and the Darzens synthesis of unsaturated ketones.
• can be obtained either by halogenation of polonium metal or by dehalogenation of polonium tetrachloride,.
• Nikolay Zelinsky, inventor of activated charcoal gas mask in Europe during World War I, co-discoverer of Hell–Volhard–Zelinsky halogenation, a founder of petrochemistry.
• halogenation of polonium dioxide with dry hydrogen chloride, gaseous thionyl chloride, or phosphorus pentachloride;.
• Walsh has demonstrated that the halogenation of unactivated methyl groups can be catalyzed by a newly discovered class of α-ketoglutarate-dependent non-heme iron halogenases, suggesting a similar enzyme family could play a role in chlorosulfolipid chlorination.
• 2,5-Dimethoxy-p-cymene can be synthesized from carvacrol by aromatic halogenation followed by nucleophilic substitution with sodium methoxide and Williamson ether synthesis using methyl iodide.
• Similarly, both-side fluorination of graphene (or chemical and mechanical exfoliation of graphite fluoride) leads to fluorographene (graphene fluoride), while partial fluorination (generally halogenation) provides fluorinated (halogenated) graphene.

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