Tolan derivative compound and liquid crystal composition containing same compound

Abstract

Abstract NEW MATERIAL:A tolan derivative compound expressed by formula I (R is 1-10C straight-chain alkyl; X is Cl or F). USE:A chemically stable material, useful as a liquid crystal composition or electrooptical element, having weak positive dielectric anisotropy, excellent in compatibility with other liquid crystals or nonliquid crystals and suitable as a liquid crystal composition for increasing values ( n) of refractive index anisotropy and reducing viscosity. PREPARATION:As shown in the reaction formulas, a compound expressed by formula II is reacted with thionyl chloride to provide a product, which is then reacted with an alkoxybenzene in the presence of anhydrous aluminum chloride. The resultant product compound expressed by formula III is subsequently reduced with lithium aluminum hydride and dehydrated with potassium hydrogensulfate. Bromine is then added and dehydrobromination is subsequently carried out using 1,5-diazabicyclo[5.4.0]undecene-5 to afford the compound expressed by formula I.

Inventors

• 👤 Katsuhiko Takeda
• 👤 勝彦 武田
• 👤 Tetsuhito Aihara
• 👤 徹人 相原
• 👤 Tamon Tachibana
• 👤 橘　多聞
• 👤 Riyousei Hayashi
• 👤 林　両成

Bibliographic Details