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Title:
OPTICALLY ACTIVE COMPOUND HAVING 4-FLUORO-1-ALKYNYL GROUP AND LIQUID CRYSTAL COMPOSITION
Document Type and Number:
Japanese Patent JPH08143488
Kind Code:
A
Abstract:

PURPOSE: To obtain a new low viscosity, liquid-crystalline and colorless optically active compound and composition excellent in chemical stability and useful for optical switching elements capable of responding at thigh speeds in wide temperature ranges and used for displays, etc.

CONSTITUTION: The optically active compound of formula I [R1 is F, (1-10C alkoxy group-substituted) 1-18C alkyl; X is single bond,-O-; m is 0, 1, preferably 0; when m is 1, the ring A is (mono-or difluorinated) 1,4-phenylene, pyrimidin-2,5- diyl, etc., the ring b, the ring C are independently (mono-or difluorinated) 1,4- phenylene, etc.; R2 is 1-18C alkyl, * is asymmetric carbon]. For example, (R)-1-(4-cyanophenyl)-1-decyn-4-ol. The compound of formula I is obtained by reacting an aromatic halide of formula II (Z is Br, I) with an optically active 1-alkyn-4-ol of formula III and subsequently reacting the reaction product with a compound of formula IV. The liquid crystal composition contains the compound of formula I preferably in an amount of 1-30wt.%.


Inventors:
TAKEHARA SADAO
OSAWA MASASHI
ITO KAYOKO
HIYAMA TAMEJIROU
KUSUMOTO TETSUO
SATO KENICHI
OGINO KUMIKO
Application Number:
JP1994000280451
Publication Date:
June 04, 1996
Filing Date:
November 15, 1994
Export Citation:
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Assignee:
DAINIPPON INK & CHEMICALS
SAGAMI CHEM RES
International Classes:
G02F1/13; C07C22/00; C07C22/08; C07C43/192; C07C43/225; C07D239/26; C07D239/34; C09K19/30; C09K19/34; C09K19/58; (IPC1-7): C07C22/00; C07C22/08; C07C43/192; C07C43/225; C07D239/26; C07D239/34; C09K19/30; C09K19/34; C09K19/58; G02F1/13
Attorney, Agent or Firm:
高橋 勝利