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Radical halogenations

N Bromosuccimmide provides a low concentration of molecular bromine which reacts with alkenes by a mechanism analogous to that of other free radical halogenations... [Pg.397]

The comparative ease with which a benzylic hydrogen is abstracted leads to high selectivity m free radical halogenations of alkylbenzenes Thus chlorination of toluene... [Pg.441]

Sections Free radical halogenation and oxidation involve reactions at the benzylic 11 12-11 13 carbon See Table 112... [Pg.465]

Halogenation (Sections 4 14 and 12 5) Replacement of a hy drogen by a halogen The most frequently encountered ex amples are the free radical halogenation of alkanes and the halogenation of arenes by electrophilic aromatic substitution... [Pg.1285]

Mechanism and selectivity of free-radical halogenation with cyclic N-haloimides 99MI19. [Pg.211]

Preparing Alkyl Halides from Alkanes Radical Halogenation 33B... [Pg.335]

Simple alkyl halides can be prepared by radical halogenation of alkanes, but mixtures of products usually result. The reactivity order of alkanes toward halogenation is identical to the stability order of radicals R3C- > R2CH- > RCH2-. Alkyl halides can also be prepared from alkenes by reaction with /V-bromo-succinimide (NBS) to give the product of allylic bromination. The NBS bromi-nation of alkenes takes place through an intermediate allylic radical, which is stabilized by resonance. [Pg.352]

A number of other methods exist for the a halogenation of carboxylic acids or their derivatives. Acyl halides can be a brominated or chlorinated by use of NBS or NCS and HBr or HCl. The latter is an ionic, not a free-radical halogenation (see 14-2). Direct iodination of carboxylic acids has been achieved with I2—Cu acetate in HOAc. " ° Acyl chlorides can be a iodinated with I2 and a trace of HI. Carboxylic esters can be a halogenated by conversion to their enolate ions with lithium A-isopropylcyclohexylamide in THF and treatment of this solution at -78°C with... [Pg.778]


See other pages where Radical halogenations is mentioned: [Pg.134]    [Pg.180]    [Pg.329]    [Pg.439]    [Pg.439]    [Pg.441]    [Pg.757]    [Pg.148]    [Pg.704]    [Pg.31]    [Pg.180]    [Pg.329]    [Pg.439]    [Pg.439]    [Pg.441]    [Pg.757]    [Pg.335]    [Pg.258]    [Pg.293]    [Pg.553]    [Pg.464]    [Pg.1651]    [Pg.1666]    [Pg.34]    [Pg.16]   
See also in sourсe #XX -- [ Pg.542 ]

See also in sourсe #XX -- [ Pg.192 ]




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Alkanes free-radical halogenation

Alkanes radical halogenation, mechanism

Alkenes, radical halogenation

Alkenes, radical halogenation cleavage

Alkenes, radical halogenation halogens

Alkenes, radical halogenation reaction with peroxides

Alkenes, radical halogenation reactions

Alkenes, radical halogenation reactivity with bromine

Alkyl radicals halogen substituted

Alkylbenzenes free radical halogenation

Allylic carbon radical halogenation

Allylic halogenation, radical

Atom transfer radical polymerization carbon—halogen bond

Benzylic halogenation, radical

Bromine radical halogenation with

Condensation polymers free radical halogenation

Ethane radical halogenation

Fluorine radical halogenation with

Free radical allylic halogenation

Free radical benzylic halogenation

Free radical halogenation of alkanes

Free radicals halogenated methanes

Free-Radical Halogenation of Alkylbenzenes

Free-radical Halogenations by Tethered Reagents

Free-radical halogenation. See

Free-radical halogenations

Free-radical reactions halogenation

Halides, alkyl from radical halogenation

Haloalkanes, Halogenation, and Radical Reactions

Halogen Substituted Hydrocarbon Radicals

Halogen atom transfer addition reactions radical cyclizations

Halogen atom transfer reactions radical cyclizations

Halogen oxide radicals, kinetics

Halogen radicals

Halogen radicals

Halogen, free radical transfer reactions

Halogen, radical substitution

Halogen, substituted carbon-centered radical

Halogenated alkyl radical additions to double and triple bonds

Halogenated silyl radical

Halogenation free radical

Halogenation free-radical chain mechanism

Halogenation photochemical free-radical

Halogenation radical processes

Halogenation synthetic radical

Halogenation with radicals

Halogenation, by free-radicals

Halogenation, radical, allylic benzylic hydrogen

Halogenation, radical, allylic hydrogen

Halogenation, radical, allylic reaction

Halogens reaction with radicals

Halogens, 6,168. radical abstraction

Hydrocarbons radical halogenation, mechanism

Hydrocarbons radical halogenations

Kinetic analysis radical halogenations

Mechanism , free-radical halogenation

Methane radical halogenations

Molecular Radicals Halogen Oxide

Other Radical Halogenations of Methane

Part A Radical Halogenation of Alkanes

Preparing Alkyl Halides from Alkanes Radical Halogenation

Propagation steps alkane radical halogenation

Pyridines radical halogenation

Quinolines halogenation by free-radicals

Radical Halogenation at an Allylic Carbon

Radical Halogenation of Alkanes

Radical Halogenation of Ethane

Radical Replacement of Halogen by Hydrogen

Radical addition halogens

Radical chain mechanism halogenation

Radical chain reactions halogenation

Radical halogenation of hydrocarbons

Radical halogenation, alkylbenzenes

Radical halogenation, methane

Radical halogenations of methane

Radical reactions halogenation

Radical relay halogenation

Radical substitution halogenation

Radical substitution reactions halogenation

Radical, halogenation

Radical, halogenation

Radicals halogen atom

Radicals halogen bridging

Radicals halogen containing alkyl

Radicals multiple halogen substitution

Radicals radical halogenation

Radicals, anti-Markovnikov halogen

Radicals, from halogens

Rate determining step radical halogenation

Reaction with halogenated methyl radicals

Reactions involving Halogen Oxide Radicals

Reactions of Alkanes Bond-Dissociation Energies, Radical Halogenation, and Relative Reactivity

Reactions of Halogen Atoms, Free Radicals, and Excited States

Regiochemistry of Free Radical Halogenation

Regioselectivity alkane radical halogenation

Selectivity in Radical Halogenation with Fluorine and Bromine

The Free-Radical Chain Mechanism of Halogenation

Thiazoles halogenation by free-radicals

Transition state free radical halogenation

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