PURPOSE: To obtain the novel chiral smectic liquid crystal consisting of an acid amide compound produced from a p-aminobenzoic acid ester and a biphenylcarboxylic acid, large in spontaneous polarization, high in electric field responsibility, and useful for liquid crystal elements, etc.
CONSTITUTION: p-Nitrobenzoic acid chloride is reacted with an optically active 2-alkanol, and the nitro group of the reactio product is reduced in the presence of palladium-carbon catalyst in a hydrogen gas atmosphere to produce an optically active 4-aminobenzoic acid ester of formula I (R2 is 3-14C alkyl; * is optically active center)[e.g. (R)-(-)-4-aminobenzoic acid 2-octyl ester]. The compound of formula I is reacted with a 4-alkyloxybiphenyl-4'-carboxylic acid chloride of formula II (R1 is 4-16C alkyl) to obtain the objective novel liquid crystal compound of formula III in which the amide group as a polar group is introduced in the liquid crystal skeleton to enlarge spontaneous polarization and enhance electric field responsibility.
MOGAMIYA HIROYUKI
SUZUKI GIICHI
HAGIWARA TAKASHI
KAWAMURA ICHIRO
KAKIMOTO MASAAKI
IMAI YOSHIO
