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US 5,665,270 AGranted
Optically active trifluorolactic acid derivative and liquid crystal composition
AssigneeChisso Corporation
InventorsMasatoshi Fukushima, Shinichi Saito
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AssigneeChisso Corporation
InventorsMasatoshi Fukushima, Shinichi Saito
Estimating the term…
An optically active compound derived from a novel trifluorolactic acid, useful as a component of a ferroelectric liquid crystal composition, and a liquid crystal composition. A compound represented by general formula (I), wherein R.sup.1 represents C.sub.1 to C.sub.18 alkyl, alkoxy, C.sub.2 to C.sub.18 alkanoyl, alkanoyloxy or alkoxycarbonyl; R.sup.2 represents optionally alkoxy-substituted alkyl (where the total number of the carbon atoms is 1 to 15); A, B and C represent each independently the group (a) or (b); v and w represent each independently --COO--, --OCO--, --CH.sub.2 O--, --OCH.sub.2 --, --CH.sub.2 --CH.sub.2 --, --CH.dbd.CH--, --C.dbd.C-- or a single bond; and x and y together represent any of the following combinations: --COO-- and --COO--; --COO-- and --CO--; --COO-- and --CH.sub.2 O--; --COO-- and --CH.sub.2 OCO--; --COO-- and --CH.sub.2 OCOO--; --O-- and --CH.sub.2 O--; --O-- and --CH.sub.2 OCO--; and --O-- and --CH.sub.2 OCOO--.
An optically active compound expressed by the formula (I) ##STR21## wherein R.sup.1 represents either one of an alkyl group, or alkoxy group of 1 to 18 carbon atoms, or an alkanoyl group, alkanoyloxy group or alkoxycarbonyl group of 2 to 18 carbon atoms, R.sup.2 represents an alkyl group which may be substituted by an alkoxy group (the total of the carbon atoms being 1 to 15), A, B and C each independently are selected from the group consisting of ##STR22## or C represents a single bond when w defined below represents a single bond, Z represents a chlorine atom or a fluorine atom, v and w each independently are selected from the group consisting of --COO--, --OCO--, --CH.sub.2 O--, --OCH.sub.2 --, --CH.sub.2 CH.sub.2 --, --CH.dbd.CH--, --C.tbd.C-- and a single bond, and x and y each are respectively selected from the following combinations consisting of --COO-- and --COO--, --COO-- and --CO--, --COO-- and --CH.sub.2 O--, --COO-- and --CH.sub.2 OCO--, --COO-- and --CH.sub.2 OCOO--, --O-- and --CH.sub.2 O--, --O-- and --CH.sub.2 OCO--, --O-- and --CH.sub.2 OCOO--.
An optically active compound expressed by the formula ##STR23## wherein R.sup.3 represents an alkyl group or aralkyl group of 1 to 10 carbon atoms.
An optically active compound used for a component of a liquid crystal composition and expressed by the formula ##STR24## wherein R.sup.4 represents an alkyl group, alkanoyl group or alkoxycarbonyl group of 1 to 16 carbon atoms, each of which may be substituted by an alkoxy group, and R.sup.5 represents a hydrogen atom, an alkyl group or aralkyl group of 1 to 10 carbon atoms.
An optically active compound expressed by the formula ##STR25## wherein R.sup.5 represents an alkyl group or aralkyl group of 1 to 16 carbon atoms each of which may be substituted by an alkoxy group, and R.sup.7 represents a hydroxyl group, a halogen atom, methanesulfonyloxy group, p-toluenesulfonyloxy group or benzenesulfonyloxy group.
An optically active compound expressed by the formula ##STR26## wherein R.sup.5 represents hydrogen atom or an alkyl group or aralkyl group of 1 to 5 carbon atoms.
Dependencies are inferred from the claim text.