Compound having unsaturated side chain, process for preparing the same, liquid crystalline polymer prepared from the same, liquid crystal mixture and display element

摘要

A compound having an unsaturated side chain represented by the formula: <IMAGE> (1) in which A and B are the same and different and represent an aromatic or heterocyclic group or either one of A and B represents a single bond; X1, X2 and X3 are the same or different and represent a hydrogen atom or a lower alkyl group; R1 represents a saturated or unsaturated alkyl group which may be substituted with a halogen atom or an alkoxyalkyl group which may be substituted with a halogen atom; X represents -CH2CH2-, -CH=CH-, -C 3BOND C- or a single bond; n is an integer of 0 to 6; q is an integer of 1 to 15; p and s are each 0 or 1; and the asterisk * indicates an asymmetric carbon atom, which is useful as an intermediate of a liquid crystal or a monomer of a liquid crystalline polymer.