| 摘要 |
NEW MATERIAL:A monomer for producing liquid crystal-forming polymers expressed by formula I (R1 is H, Cl or methyl; R2 is 2-20C alkylene; n is 1 or 2; X is H, methyl or cyano; R3* is alkyl having 4-15C asymmetric carbon atom). 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. 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. |
