3,4-dichlorobenzoic acid 4-(trans-4'-(trans-4"-alkylcyclohexyl) cyclohexyl)phenyl ester

Abstract

Abstract NEW MATERIAL:The compound of formula I (R is H or 1-10C alkyl). EXAMPLE:3, 4-Dichlorobenzoic acid 4-[ trans-4'-( trans-4''-propylcyclohexyl )-cyclohexyl]phenyl ester. USE:A liquid crystal substance exhibiting a liquid crystal phase over a wide temperature range, having high clear point, and nevertheless, low viscosity and positive dielectric anisotropy. When the compound is used as a component of a liquid crystal composition, the clear point of the composition can be raised without increasing the viscosity of the composition nor too much affecting the threshold voltage and saturation voltage. PROCESS:The compound of formula I can be prepared by (1) reacting 4-bromoanisole of formula II with metallic Mg, (2) reacting the product with 4-(trans-4'- alkylcyclohexyl)cyclohexanone to obtain the compound of formula III, (3) subjecting the compound successively to dehydration, reduction, and demethylation, and (4) reacting the resultant compound of formula IV with 4-dichlorobenzoic acid chloride.

Inventors

• 👤 Shigeru Sugimori
• 👤 滋 杉森
• 👤 Tetsuhiko Kojima
• 👤 哲彦 小島

Bibliographic Details