A facile synthesis and electro-optical properties of new liquid crystals having a vic-difluoro olefinic moiety

Chemistry Letters

Volumn , Issue 11, 1998, Pages 1169-1170

  Kanie, Kiyoshi ^a,c   Tanaka, Yoichiro ^a   Takehara, Sadao ^b   Hiyama, Tamejiro ^a,d  

^a TOKYO INSTITUTE OF TECHNOLOGY   (Japan)

^b DIC CORPORATION   (Japan)

^c UNIVERSITY OF TOKYO   (Japan)

^d KYOTO UNIVERSITY   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0032268783     PISSN: 03667022     EISSN: None     Source Type: Journal    
DOI: 10.1246/cl.1998.1169     Document Type: Article

References (18)

1. M. Hudlicky and A. E. Pavlath, Chemistry of Organic Fluorine Compounds II. A Critical Review, ACS Monograph 187, Washington, DC, 1995 and references cited therein.
2. a) H. Nohira, Nippon Kagaku Kaishi, 1994, 467.
3. b) D. Prescher, T. Thiele, R. Ruhmann, and G. Schulz, J. Fluorine Chem., 74, 185 (1995).
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5. M. Schmidt, R. Buchecker, and A. Villiger, Liquid Crystals, 7, 519 (1990).
6. K. Kitazima, O. Yokokozi, T. Tachibana, and S. Inoue, The 23rd Symposium on Liquid Crystals, 2PA12, Tokyo, 1997.
7. A prevailing method for the synthesis of vic-difluoro olefins involves the reaction of an organometallic reagent with 1,1,2-trifluoro-1-alkenes. See ref. 4.
8. M. Kuroboshi and T. Hiyama, Bull. Chem. Soc. Jpn., 68, 1799 (1995).
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11. S. Furuta, M. Kuroboshi, and T. Hiyama, Tetrahedron Lett., 36, 8243 (1995); idem, Bull. Chem. Soc. Jpn., in press.
12. 19F NMR spectroscopy.
13. Since compound 4 was not stable in neat liquid, it was necessary to immediately oxidize 4 to 5.
14. K. Kim and J. R. WcCarthy, Tetrahedron Lett., 37, 3223 (1996).
15. 3) -160.63 (ddt, J = 127, 3, 23 Hz) and -184.20 (ddt, J = 127, 77, 5 Hz)).
16. Measured by differential scanning calorimetry (DSC).
17. Observed with an optical polarizing microscope equipped with a hot stage.
18. This work was financially supported by Grant-in-Aids for Scientific Research (A) (No. 07405042) and for Scientific Research on Priority Area (284-09239102) both from the Ministry of Education, Science, Sports and Culture and by a Grant-in-Aid for Research for the Future (JSPS-RFTS 97R11601) from the Japan Society for the Promotion of Science. K.K. acknowledges the financial assistance by the Sasagawa Scientific Research Grant from the Japan Science Society and the JSPS Research Fellowship for Young Scientists. We thank Professor Tomiki Ikeda of Research Laboratory of Resources Utilization, Tokyo Institute of Technology, for DSC measurements.