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Topic: Haloarene

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	Flash Photolysis Observation of Aryl, 2,3-Dihydrocyclohexadienyl, and Halogen Anion Radicals in Aqueous Solution: ... (Site not responding. Last check: 2007-11-06)
		A thorough investigation of the transient species from the laser flash photolysis of haloarene tethered arenes has been performed.
		Some transient species in the laser photolysis of N-benzyl-2-halopyridinium and N-(2-halobenzyl)pyridinium bromides have been investigated as an effort to understand the photocyclized reaction mechanism as well as to know the properties of the transients themselves.
		On the basis of the observation of these intermediates, their properties, and the reactant reactivities, a mechanism of the photohomolytic bond cleavage of carbon-halogen followed by radical arylation and hydrogen ejection is proposed for the intramolecular photocyclization of haloarene tethered arenes in water.
	pubs.acs.org /subscribe/journals/jacsat/118/i46/abs/ja960470m.html (277 words)

	(WO/2001/038333) PRODUCTION OF DISUBSTITUTED PENTAFULVENS VIA LITHIATED SILYL-(HALO)ARENE INTERMEDIATES (Site not responding. Last check: 2007-11-06)
		Lithiated haloarenes, although useful as intermediates in the synthesis of various end products, can be hazardous to prepare since unstable, shock sensitive compounds can be formed during lithiation of haloarenes.
		To avoid this problem, a reaction of a polyhaloarene with a hydrocarbyl lithium compound is conducted in the presence of another reactant so that the lithiated haloarene, if formed at all, exists as a transitory intermediate in low concentration.
		In this way, transitory lithiated haloarene which may be, and presumably is, formed in the reaction is converted into a non-hazardous functionally-substituted haloarene essentially as soon as such lithiated haloarene is formed.
	www.wipo.int /ipdl/IPDL-CIMAGES/view/pct/getbykey5?KEY=01/38333.010531 (279 words)

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