Dainippon Ink and Chemicals, Incorporated

Sagami Chemical Research Center

Kawamura Institute of Chemical Research

Other

Kayoko Nakamura

Takeshi Kuriyama

Sadao Takehara

Toru Fujisawa

Masashi Osawa

Tadao Shoji

Tamejiro Hiyama

Hiroshi Ogawa

Akiko Nakayama

Tetsuo Kusumoto

Kiyoharu Nishide

Kusumoto, Tetsuo

A 2,5-disubstituted pyrizine derivative and a 2,5-disubstituted pyrimidine derivative of the formula (I): ##STR1## wherein R.sup.1 and R.sup.2 each independently represents a straight-chain or branched alkyl group containing 1 to 20 carbon atoms;

2,5-disubstituted pyrazine derivatives, pyrimidine derivatives, and

The present invention discloses an optically active compound represented by the following general formula (I): ##STR1## wherein R.sup.1 represents an alkyl, alkoxyl, or alkoxyalkanoyloxy group which has 1 to 18 carbon atoms and may be substituted with fluorine, chlorine, or cyano group; R.sup.2 represents an alkyl group having 1 to 18 carbon atoms; ##STR2## m is 0 or 1; Y represents a single bond, --CH.sub.2 O--, or --COO--; Z represents a single bond or --COO--; and C* and C** each independently represents an asymmetric carbon atom of the (R) and (S) configuration, an intermediate therefor being represented by the following general formula (II): ##STR3## wherein R.sup.2 represents an alkyl group having 1 to 18 carbon atoms, n is 0 or 1, and C* and C** each independently represents an asymmetric carbon atom of the (R) or (S) configuration, a process for producing the intermediate, and a liquid-crystal compound using the optically active compound.

Optically active compound, intermediate therefor, process for producing

An optically active lactone derivative represented by the following general formula (I): ##STR1## wherein R.sup.1 represents a straight-chain or branched alkyl, alkoxyl, alkanoyloxy, alkoxycarbonyl, alkoxyalkyl, alkoxyalkanoyloxy, or alkoxyalkoxyl group having 1 to 20 carbon atoms or an optically active group of each of the above kinds, R.sup.2 represents a straight-chain or branched alkyl group having 1 to 20 carbon atoms, ##STR2## or trans-1,4-cyclohexylene group of the formula and the asymmetric carbon atoms at the 2- and 4-positions in the lactone ring each independently is of the (S) or (R) configuration, an intermediate therefor, a process for producing the intermediate, a liquid-crystal composition, and a liquid-crystal display device.

Optically active lactone derivative, intermediate therefor, process for

A 2,5-disubstituted pyrazine derivative and a 2,5-disubstituted pyrimidine derivative of the formula (I): ##STR1## wherein R.sup.1 and R.sup.2 each independently represents a straight-chain or branched alkyl group containing 1 to 20 carbon atoms;

2,4-disubstituted pyrazine derivatives, pyrimidine derivatives, and

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Chiba, Japan

Kayoko Nakamura