[1] [1] KIRSCH P, BREMER M. Nematic liquid crystals for active matrix displays: molecular design and synthesis [J]. Angewandte Chemie International Edition, 2000, 39(23): 4216-4235.

[2] [2] KIRSCH P, BREMER M, TAUGERBECK A, et al. Difluorooxymethylene-bridged liquid crystals: a novel synthesis based on the oxidative alkoxydifluorodesulfuration of dithianylium salts [J]. Angewandte Chemie International Edition, 2001, 40(8): 1480-1484.

[3] [3] LI J, HU M G, LI J L, et al. Highly fluorinated liquid crystals with wide nematic phase interval and good solubility [J]. Liquid Crystals, 2014, 41(12): 1783-1790.

[4] [4] BREMER M, KIRSCH P, KLASEN-MEMMER M, et al. The TV in your pocket: development of liquid-crystal materials for the new millennium [J]. Angewandte Chemie International Edition, 2013, 52(34): 8880-8896.

[5] [5] KIRSCH P, BREMER M. Understanding fluorine effects in liquid crystals [J]. ChemPhysChem, 2010, 11(2): 357-360.

[6] [6] KIRSCH P, BINDER W, HAHN A, et al. Super-fluorinated liquid crystals: towards the limits of polarity [J]. European Journal of Organic Chemistry, 2008, 2008(20): 3479-3487.

[7] [7] ARAKI K, YAMAMOTO T, TANAKA R, et al. Stereoselective synthesis and physicochemical properties of liquid-crystal compounds possessing a trans-2, 5-disubstituted tetrahydropyran ring with negative dielectric anisotropy [J]. Chemistry: A European Journal, 2015, 21(6): 2458-2466.

[9] [9] KIRSCH P, MAILLARD D. A convenient synthetic route to tetrahydropyran-based liquid crystals [J]. European Journal of Organic Chemistry, 2006, 2006(15): 3326-3331.

[10] [10] FRIEDMAN M R, TOYNE K J, GOODBY J W, et al. The synthesis and transition temperatures of 2-(4-alkyl-and 4-alkoxy-phenyl)-5-cyano-1-benzofurans and related diaryl-1-benzofurans—an assessment of how deviations from linearity and conformational effects in a core unit affect mesogenicity [J]. Journal of Materials Chemistry, 2001, 11(11): 2759-2772.

[12] [12] MARKUS K, EIKE P, ATSUTAKA M, et al. Benzofuran and benzothiophene derivatives, useful as components of liquid crystal media for electro-optical display devices are new: Germany, DE102004053279A [P]. 2005-06-23.

[13] [13] KUNDU N G, PAL M, MAHANTY J S, et al. Palladium-catalysed heteroannulation with acetylenic compounds: synthesis of benzofurans [J]. Journal of the Chemical Society, Perkin Transactions 1, 1997(19): 2815-2820.