Synthesis of triphenylene and dibenzopyrene derivatives: vanadium oxytrichloride a novel reagent

Kumar, Sandeep; Varshney, S.K.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/4660

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DC Field	Value	Language
dc.contributor.author	Kumar, Sandeep	-
dc.contributor.author	Varshney, S.K.	-
dc.date.accessioned	2012-06-09T10:13:26Z	-
dc.date.available	2012-06-09T10:13:26Z	-
dc.date.issued	2001	-
dc.identifier.citation	Synthesis, 2001, p305-311	en
dc.identifier.issn	0039-7881	-
dc.identifier.issn	1437-210X (Online)	-
dc.identifier.uri	http://hdl.handle.net/2289/4660	-
dc.description	Restricted Access.	en
dc.description.abstract	This paper presents an efficient synthetic procedure for the preparation of various triphenylene and dibenzopyrene derivatives using VOCl3 as a novel reagent. Symmetrically substituted hexaalkoxytriphenylenes are obtained from o-dialkoxybenzenes by oxidative trimerization with VOCl3 in high yields. The oxidative coupling of a 3,3’,4,4’-tetraalkoxybiphenyl and 1,2-dialkoxybenzenes or 1,2,3-trialkoxybenzenes affords unsymmetrically substituted derivatives of triphenylene. The reagent oxidizes 3,3’,4,4’- tetraalkoxybiphenyl efficiently to 2,5,6,9,12,13-hexaalkoxydibenzo[ fg,op]naphthacene-1,8-quinone and its 1,10-quinone isomer. Both the quinones can be converted to liquid crystalline derivatives using well-established chemistry. Effects of solvent, reagent concentration, acid catalyst and temperature have been studied.	en
dc.language.iso	en	en
dc.publisher	Thieme Publishing	en
dc.rights	2001 Thieme Publishing	en
dc.subject	triphenylene	en
dc.subject	dibenzopyrene	en
dc.subject	vanadium oxytrichloride	en
dc.subject	oxidative coupling	en
dc.subject	discotic liquid crystals	en
dc.title	Synthesis of triphenylene and dibenzopyrene derivatives: vanadium oxytrichloride a novel reagent	en
dc.type	Article	en
Appears in Collections:	Research Papers (SCM)

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