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Synthesis of Some Novel Aromatic Alkynyl Silanes: Mesomorphic Characterization of Ethynyl-Substituted Rod-Shaped Molecules |
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| Authors: | H. T. Srinivasa S. Hariprasad |
| Affiliation: | 1. Department of Studies in Chemistry , Bangalore University , Bangalore , India;2. Raman Research Institute , Sadashivanagara , Bangalore , India;3. Department of Studies in Chemistry , Bangalore University , Bangalore , India |
| Abstract: | The synthesis and characterization of 10 new rod-shaped substituted benzoates possessing the 4-(2-trimethylsilyl)ethynyl group in terminal phenyl position is reported employing the simple and efficient Sonogashira cross-coupling and DCC esterification. 4′-Dodecylbiphenyl-4-carboxylic(2-trimethylsilylethynyl)-phenyl ester (3i), 4-(4′-hexadecyloxybenzyloxy) carboxylic-4-trimethylsilanylethynyl-phenyl ester (3j), and 1,4-bis(4-(pentyloxy)phenyl)buta-1,3-diyne (7) compounds were evaluated for liquid crystal property. [Supplemental materials are available for this article. Go to the publisher's online edition of Molecular Crystals and Liquid Crystals to view the free supplemental file.] |
| Keywords: | Liquid crystals Smectic mesophase Sonogashira coupling 2-trime- thylsilylethynyl |