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Aromatic halogen compounds photochemical reactions

Pyrrole derivatives were used as aromatic partners in photochemical heteroarylation reactions with a number of halogen-containing compounds, for example, the quinone 593 reacts with iV-methylpyrtole to give the corresponding pyrrolyl derivative 594 (Equation 141) <1997J(P1)2369>. This reaction occurs via a charge transfer complex in the ground state. [Pg.134]

Iodine in combination with [bis(acyloxy)iodo]arenes is a classical reagent combination for the oxidative iodination of aromatic and heteroaromatic compounds [99], A typical iodination procedure involves the treatment of electron-rich arenes with the PhI(OAc)2-iodine system in a mixture of acetic acid and acetic anhydride in the presence of catalytic amounts of concentrated sulfuric acid at room temperature for 15 min [100,101]. A solvent-free, solid state oxidative halogenation of arenes using PhI(OAc)2 as the oxidant has been reported [102]. Alkanes can be directly iodinated by the reaction with the PhI(OAc)2-iodine system in the presence of f-butanol under photochemical or thermal conditions [103]. Several other iodine(in) oxidants, including recyclable hypervalent iodine reagents (Chapter 5), have been used as reagents for oxidative iodination of arenes [104-107]. For example, a mixture of iodine and [bis(trifluoroacetoxy)iodo]benzene in acetonitrile or methanol iodinates the aromatic ring of methoxy substituted alkyl aryl ketones to afford the products of electrophilic mono-iodination in 68-86% yield [107]. [Pg.160]


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See also in sourсe #XX -- [ Pg.378 , Pg.383 , Pg.389 , Pg.390 ]




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Aromatic compounds halogenation

Aromatic compounds photochemical reactions

Aromatic compounds reactions

Aromatic photochemical reactions

Aromatics halogenation

Aromatics halogens

Aromatics, halogenated

Aromatization photochemical

Halogen compounds

Halogen compounds aromatic

Halogen compounds, reaction

Halogenated aromatic

Halogenation compounds

Halogenation reactions

Halogenation reactions aromatic compounds

Photochemical aromatic

Reactions halogens

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