alexa Synthesis of Symmetrical and Unsymmetrical Triphenylene Discotic Liquid Crystals Using Antimony(V)Chloride Under Scholl Oxidation
ISSN: 2161-0401

Organic Chemistry: Current Research
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Research Article

Synthesis of Symmetrical and Unsymmetrical Triphenylene Discotic Liquid Crystals Using Antimony(V)Chloride Under Scholl Oxidation

Sandeep Kumar* and Srinivasa HT
Raman Research Institute, C.V. Raman Avenue, Sadashivanagar, Bangalore, India
Corresponding Author : Sandeep Kumar
Raman Research Institute, C.V. Raman Avenue
Sadashivanagar, Bangalore, India
Tel: +918023610122
Fax: +918023610492
E-mail: [email protected]
Received March 22, 2013; Accepted April 15, 2013; Published April 22, 2013
Citation: Kumar S, Srinivasa HT (2013) Synthesis of Symmetrical and Unsymmetrical Triphenylene Discotic Liquid Crystals Using Antimony(V)Chloride Under Scholl Oxidation. Organic Chem Curr Res 2:116. doi:10.4172/2161-0401.1000116
Copyright: © 2013 Kumar S, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Triphenylene-based discotic liquid crystals, useful in studying the energy and charge migration in self-organized systems, are the most widely synthesized and studied discotic liquid crystals. In this paper, we report an efficient synthetic procedure for the preparation of symmetrical and unsymmetrical triphenylene discotic liquid crystals using antimony pentachloride as a novel reagent. Scholl oxidative trimarization of 1,2-dialkoxybenzenes with SbCl5 yields hexaalkoxytriphenylenes in good yield, while the oxidative coupling of a 3,3’,4,4’-tetraalkoxybiphenyl with a 1,2,3-trialkoxybenzene affords an unsymmetrically substituted heptaalkoxy-triphenylene derivative. The potential of this new reagent was compared with the other known reagents for the synthesis of alkoxytriphenylenes.

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