2,5-disubstituted pyrazine derivatives, pyrimidine derivatives, and
申请人:Dainippon Ink and Chemicals, Inc.
公开号:US05128472A1
公开(公告)日:1992-07-07
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; X represents a halogen atom; and ##STR2## represents a pyrazine-2,5-diyl or a pyrimidine-2,5-diyl group; each useful as an electrooptical display material are disclosed. Further a liquid crystal composition comprising said compounds as well as a ferroelectric display device wherein said liquid crystal composition is used are disclosed.
2,5-disubstituted pyrazine derivatives, pyrimidine derivatives, and liquid crystal containing the same
申请人:DAINIPPON INK AND CHEMICALS, INC.
公开号:EP0339252A2
公开(公告)日:1989-11-02
A 2,5-disubstituted pyrazine derivaitve and a 2,5-disubstituted pyrimidine derivative of the formula (I):
wherein R¹ and R² each independently represents a straight chain or branched alkyl group containing 1 to 20 carbon atoms;
X represents a halogen atom; and
represents a pyrazine-2,5-diyl or a pyrimidine-2,5-diyl group;
each useful as an electrooptical display material are disclosed. Further a liquid crystal composition comprising said compounds as well as a ferroelectric display device wherein said liquid crystal composition is used are disclosed.
2,4-disubstituted pyrazine derivatives, pyrimidine derivatives, and
申请人:Dainippon Ink and Chemical, Inc.
公开号:US04997942A1
公开(公告)日:1991-03-05
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; X represents a halogen atom; and ##STR2## represents a pyrazine-2,5-diyl or a pyrimidine-2,5-diyl group; each useful as an electrooptical display material are disclosed. Further a liquid crystal composition comprising said compounds as well as a ferroelectric display device wherein said liquid crystal composition is used are disclosed.