NEW MATERIAL:The 1,4-disubstituted benzene of formulaI(R is 1W10C alkyl or alkoxy; the group of formula II is group of formula III, formula IV or formula V).
EXAMPLE: 1-(trans-4'-Cyclohexylcyclohexyl)-4-methoxybenzene.
USE: A component of a liquid crystal composition. It is a smectic liquid crystal having low viscosity, and is suitable especially for improving the viscosity of the composition. The compound of formulaIwherein the group of formula II is formula III or formula V is especially stable to moisture, air, heat, light, etc.
PROCESS: The compound of formulaIwherein the group of formula II is formula IV can be prepared by (1) reacting the 4-substituted bromobenzene of formula VI with metallic magnesium, (2) reacting the resultant compound of formula VII with 4-cyclohexylcyclohexanone of formula VIII to obtain the compound of formula IX, and (3) dehydrating the product using KHSO4 as a catalyst. Reduction of the product with Raney-nickel catalyst affords another compound of formulaIwherein the group of formula II is formula III.
TSUJI MASAKAZU
KOJIMA TETSUHIKO
| JPS5612323A | 1981-02-06 |