Cyclohexane carbaldehyde compounds and processes for preparing silacyclohexane-based liquid crystal compounds from the carbaldehyde

摘要

A cyclohexane carbaldehyde compound of the following formula (I) <IMAGE> (I) wherein Ar represents a phenyl group or a tolyl group, and R represents a phenyl group, a tolyl group, a linear alkyl group, a mono or difiuoroalkyl group, a branched alkyl group or an alkoxyalkyl group. Processes for preparing a silacyclohexane-based liquid crystal compound of the following formula (II) or (III) from the cyclohexane carbaldehyde are also described sents a phenyl group, a tolyl group, a linear alkyl group, a mono or difiuoroalkyl group, a branched alkyl group or an alkoxyalkyl group, X represents R or OR, in which R has the same meaning as defined above, CN, F, C1, Br, CF3, OCF3, OCHFCL, OCF2Cl, CF2Cl, (O)mCY1=CX1X2, O(CH2)r(CF2)sX3, wherein m is a value of 0 or 1, Y1 and X1 independently represent H, F or Cl, X2 represents F or Cl, r and s are, respectively, a value of 0, 1 or 2 provided that r+s=2, 3 or 4, and X3 represents H, F or Cl, Y represents a halogen or a methyl group, Z represents a halogen or CH3, i is a value of 0, 1 or 2, and j is a value of 0, 1 or 2.