PURPOSE:To obtain a new phenyl ester-based anti-ferroelectric liquid crystal substance useful for a liquid crystal display element taking advantage of high- speed response, switching between three stable states, clear threshold value characteristics and excellent memory properties. CONSTITUTION:A phenyl ester-based anti-ferroelectric liquid crystal substance shown formula I (R is 6-14C straight-chain aliphatic alkyl; X is single bond or O; K and L are 1 or 2; (n) is 2-8; C* is asymmetric carbon atom) such as 4-(1-ethylheptyloxycarbonylphenyl) 4'-desiloxy-biphenyl-4-carboxylate. The compound shown by formula I in the case of X is O is obtained by reacting a compound shown by formula II with a compound shown by the formula RBr to give a compound shown by formula III, on the other hand, converting a compound shown by formula IV into an acid chloride, reacting the acid chloride with a compound shown by formula V, reacting the prepared compound shown by formula VI with benzylamine to give a compound shown by formula VII, reacting the compound shown by formula III with thionyl chloride to form an acid chloride and reacting the compound shown by formula VII with the acid chloride.
PHENYL ESTER-BASED LIQUID CRYSTAL SUBSTANCE