Synthesise of (4-Ethynyl-Phenyl)-(4-trifluoromethyl-phenyl)-Diazene, a Novel Intermediate of Azobenzene Liquid Crystal with High Birefrigence
2014 ◽
Vol 584-586
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pp. 1705-1708
Keyword(s):
In order to obtain an important azobenzene liquid crystal intermediate with phenylacetylene group, Sonogashira coupling reaction was used to preparation the compound. In this paper, the intermediate was synthesized by (4-Iodo-phenyl)-(4-trifluoromethyl-phenyl)-diazene and trimethyl silyl acetylene (TMSA) as raw materials, and then the trimethyl silyl group was removaled under the action of K2CO3. During the synthesis, the optimum reaction conditions were obtained, that the mol ratio of (4-Iodo-phenyl)-(4-trifluoromethyl-phenyl)-diazene and trimethyl silyl acetylene was 1:2, the reaction temperature was 80 oC. Fourier transform infrared spectroscopy (FT-IR) was used to measure the molecular structure of the target compound.
2013 ◽
Vol 781-784
◽
pp. 280-282
2013 ◽
Vol 785-786
◽
pp. 690-692
2013 ◽
Vol 785-786
◽
pp. 680-683
2018 ◽
Vol 14
◽
pp. 1871-1884
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2009 ◽
Vol 15
(9)
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pp. 2041-2044
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2009 ◽
Vol 298
(1-2)
◽
pp. 94-98
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Keyword(s):
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