LIQUID CRYSTAL COMPOUND AND COMPOSITION

Japanese Patent JPH0625059

A

PURPOSE: To obtain a new compound useful as a liquid crystal composition used in a liquid crystal display element.

CONSTITUTION: The compound of formula 1 (R1 is 1-18C alkyl or alkenyl; A is formula 7 to 11; NAP is 2,6-naphthylene; R2 is 1-18C alkyl). The compound of formula 1 in which A is formula 7 is obtained by reacting a compound of formula 5 derived from 6-bromo-2-naphthol with a compound of formula 6 in the presence of a Pd catalyst. When this compound is used as a component of a chiral smectic C phase liquid crystal composition, a liquid crystal composition good in orienting properties without zigzag defects can be obtained and a liquid crystal display element having a high contrast ratio can be obtained. Since other smectic phases are not exhibited in a low-temperature region, this compound can be used as a component of the chiral smectic C phase liquid crystal composition to extend the temperature range of the chiral smectic C phase.

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SATO MASAHIRO
SUGITA NAOKO
WATANABE TETSUYA
YOSHIO KUNIKIYO
YANAGI TATSURO

JP21627392A

February 01, 1994

June 22, 1992

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SANYO CHEMICAL IND LTD

C07D239/34; C07C43/205; C07C43/215; C07C43/225; C09K19/32; C09K19/34; (IPC1-7): C07C43/225; C07C43/205; C07C43/215; C07D239/34; C09K19/32; C09K19/34

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