Fluorine-containing optically active compound, process for preparing the same and liquid crystal mixture and liquid crystal element comprising the same

U.S. Patent Number: 5779934

Abstract: 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.

Inventors: Higashii; Takayuki (Irvington, NY), Fujimoto; Yukari (Takatsuki, JP), Matsumoto; Tsutomu (Kyoto, JP), Minai; Masayoshi (Moriyama, JP), Sekine; Chizu (Tsukuba, JP), Endo; Kyoko (Ibaraki, JP), Fujisawa; Koichi (Tsukuba, JP)

Assignee: Sumitomo Chemical Company, Limited (Osaka, JP)

Application Number: 08/388,424

Issued: 1998-07-14

Expired: 2006-07-14

Classes: 252/299.61 ; 252/299.62; 252/299.66; 544/242; 544/245; 544/249; 544/253; 544/295; 544/296; 544/298

Field of search: 252/299.61,299.62,299.66 544/242,245,249,253,295,296,298

Click the image above to view patent images at uspto.gov within a frame.

Click here for the fulltext page on uspto.gov within a frame.