PURPOSE: To provide the subject compound having a low viscosity, stable to light and useful for producing a rapid-response liquid crystal composition.
CONSTITUTION: Compounds of formula I [A1 to A4 are a trans-1,4-disubstituted cyclohexylene or a 1,4-substituted phenylene; provided that the above-mentioned groups may have one or more halogens, etc., as (substituent) groups. One or more CH may be substituted with N; Y1 and Y2 are -COO-, single bond, etc.; m and n are 0 or 1; R1 and R2 are a 1-10C alkyl, a halogen, etc.; provided that, in the case of an alkyl, 0 may be inserted into C-C bond, etc.], e.g. 1- fluoro-1,2-bis(4-n-propylphenyl)ethane. The compound of formula I is obtained, e.g. by reacting a reducing agent such as sodium boronhydride with a ketone derivative of formula II and subsequently reacting the resultant hydroxy compound of formula III with diethylaminosulfate trifluoride as a fluorination agent.
YOKOKOJI OSAMU
MIYAJIMA TAKASHI
KO HIDEMASA
MACHIDA KATSUTOSHI
SEIMI CHEM KK