NEW MATERIAL:A liquid crystal compound of formula (X, Y are 1W6C alkyl or alkoxy).
EXAMPLE: 4-(n-Propyl)-cyclohexanecarboxylic acid 4'-ethoxyphenyl thioester.
USE: Raw material of liquid crystal composition. Suitable to a twisted nematic display, a display based on guest-host effect, etc.
PROCESS: The objective cyclohexanecarboxylic acid thioester is prepared by reacting (A) an acid chloride obtained by reacting a cyclohexanecarboxylic acid obtained by the reduction of benzoic acid, with thionyl chloride, etc., with (B) a thiophenol obtained from a phenol or aniline having the objective group at the p-position, in the presence of (C) a tertiary amine such as triethylamine or pyridine, etc.