Sumitomo Chemical Company, Limited

Kyoko Endo

Masayoshi Minai

Takayuki Higashii

Chizu Sekine

Koichi Fujisawa

Yukari Fujimoto

Naoyuki Takano

Takeshi Tani

Kayoko Ueda

Tsutomu Matsumoto

The present invention relates to trans-olefin compounds represented by the general formula (1) useful as an ingredient of liquid crystal composition, trans-olefin compounds useful as intermediate of pesticides, medical drugs, liquid crystal materials and the like, a process for producing those trans-olefin compounds, a liquid crystal composition containing the trans-olefin compound as an active ingredient, and a liquid crystal element using the liquid crystal composition. ##STR1## (In the general formula (1), R.sup.1, A.sup.1, A.sup.2, A.sup.3, Z and R.sup.2 are same as defined in the specification. Also, m, p, q, n, r, s and t are each an integer as defined in the specification.)

Trans-olefin compounds, method for production thereof, liquid crystal

A fluorine-containing optically active compound represented by the formula (1): ##STR1## wherein R.sub.1 is a saturated or unsaturated C.sub.3 -C.sub.20 alkyl group or a saturated or unsaturated C.sub.3 -C.sub.20 alkoxyalkyl group; A.sup.1, A.sup.2 and A.sup.3 independently represent one of the following groups: ##STR2## provided that, when A.sup.1 is a condensed ring group, a sum of p and q is 0 or 1 and A.sup.2 and A.sup.3 are both monocyclic groups, or when A.sup.1 is a monocyclic group, a sum of p and q is 1 or 2 with the proviso that when the sum of p and q is 2, A.sup.2 and A.sup.3 are both monocyclic groups; X is --CH.sub.2 CH.sub.2 --, --CH.dbd.CH-- or --C.tbd.C--; W is a fluorine atom or a hydrogen atom; n is an integer of 1 to 10; m, p and q are each 0 or 1; u and w are each an integer of 0 to 3; and * indicates an asymmetric carbon atom, which is useful as a component of a liquid crystal mixture.

Fluorine-containing optically active compound, process for preparing the

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Ibaraki-ken, Japan

Kyoko Endo