| abstract |
NEW MATERIAL:A monomer for producing liquid crystal-forming polymers expressed by formula I (R 1 is H, Cl or methyl; R 2 is 2-20C alkylene; n is 1 or 2; X is H, methyl or cyano; R 3 * is alkyl having 4-15C asymmetric carbon atom). n USE: Useful as a liquid crystal-forming polymer, capable of exhibiting high-speed responsiveness and useful in the field of display elements, optical recording media, nonlinear optical elements, etc., and utilized as a material effectively used in the field of recording and communication. n PREPARATION: As shown in the reaction formulas, hydroxyl group in a hydroxyalkyloxybenzoic acid is acylated with (meth)acrylic acid, then converted into an acid chloride and activated. The resultant activated acid chloride is subsequently coupled with p-hydroxycinnamic acid, p-hydroxycinnamylideneacetic acid or cyano derivatives thereof and finally esterified with an optically active alcohol to afford the monomer expressed by formula I. n COPYRIGHT: (C)1990,JPO&Japio |