摘要:
An optically active functional compound represented by the following formula (1) is disclosed: ##STR1## wherein R denotes an alkyl group having 1-14 carbon atoms; -X- denotes ##STR2## denotes a single bond, ##STR3## n=0, 1 or 2; and C* denotes an asymmetric carbon atom. The compound of the formula (1) may be produced through an optically active compound of the following formula (2) or (3): ##STR4## The compounds of the above formulas (1)-(3) are all characterized by a trifluoromethyl group providing a large spontaneous polarization attached to an asymmetric carbon atom.
摘要:
An optically active functional compound represented by the following formula (1) is disclosed: ##STR1## wherein R denotes an alkyl group having 1-14 carbon atoms; --X-- denotes ##STR2## Y denotes a single bond, ##STR3## or --O--; n=0, 1 or 2; and C* denotes an asymmetric carbon atom. The compound of the formula (1) may be produced through an optically active compound of the following formula (2) or (3): ##STR4## The compounds of the above formulas (1)-(3) are all characterized by a trifluoromethyl group providing a large spontaneous polarization attached to an asymmetric carbon atom.
摘要翻译:公开了由下式(1)表示的光学活性官能化合物:其中R表示具有1-14个碳原子的烷基; -X-表示 Y表示单键,或-O-; n = 0,1或2; C *表示不对称碳原子。 (1)的化合物可以通过下式(2)或(3)的光学活性化合物制备:(3)上述式(1) - (3)的全部特征在于提供附着在不对称碳原子上的大的自发极化的三氟甲基。
摘要:
An optically active, generally mesomorphic compound represented by the following formula (I): ##STR1## wherein R.sub.1 denotes an alkyl group having 1-18 carbon atoms, R.sub.2 denotes an alkyl group having 1-12 carbon atoms; X denotes a single bond, --O--, ##STR2## Y denotes a single bond, ##STR3## --CH.sub.2 O-- or --OCH.sub.2 --; Z denotes --OCH.sub.2 --, ##STR4## C* denotes an asymmetric carbon atom; k, m and n are respectively 0, 1 or 2 with proviso that k+m+n amounts to 2 or 3; and p is 1 or 2.
摘要:
An optically active, generally mesomorphic compound represented by the following formula (I): ##STR1## wherein R.sub.1 denotes an alkyl group having 1-18 carbon atoms, R.sub.2 denotes an alkyl group having 1-12 carbon atoms; X denotes a single bond, --O--, ##STR2## Y denotes a single bond, ##STR3## --CH.sub.2 O-- or --OCH.sub.2 --; Z denotes --OCH.sub.2 --, ##STR4## respectively denotes ##STR5## C* denotes an asymmetric carbon atom; k, m and n are respectively 0, 1 or 2 with proviso that k+m+n amounts to 2 or 3; and p is 1 or 2.
摘要翻译:由下式(I)表示的光学活性的通常介晶化合物:其中R1表示具有1-18个碳原子的烷基,R2表示具有1-12个碳原子的烷基; X表示单键,-O-,Y表示单键,图示-CH 2 O-或-OCH 2 - ; Z表示-OCH2-,分别表示不对称碳原子; C *表示不对称碳原子; k,m和n分别为0,1或2,条件是k + m + n为2或3; p为1或2。
摘要:
A liquid crystal composition, comprising: at least one optically active mesomorphic compound having an asymmetric carbon atom to which a fluorine atom is directly bonded.
摘要:
An optically active mesomorphic compound is represented by the following formula (I): ##STR1## wherein R.sub.1 and R.sub.2 are respectively an alkyl group having 1 to 16 carbon atoms, and C* denotes an asymmetric carbon atom. The mesomorphic compound has a fluorine atom directly connected to the asymmetric carbon atom and is effectively used as a liquid crystal component providing an increased spontaneous polarization and an improved responsiveness.
摘要:
An optically active 2-cyano-2-methyl-alkanoic acid represented by the formula: ##STR1## is produced by optical resolution of the corresponding racemic mixture thereof with an optically active amine and is reduced to provide an optically active 2-cyano-2-methyl-1-alkanol represented by the formula: ##STR2## wherein R.sub.1 denotes an alkyl groups having 3-10 carbon atoms, R.sub.2 denotes an alkyl group having 2-10 carbon atoms and C* denotes an asymmetric carbon atom. These compounds are characterized by having a CN group with a large dipole moment directly attached to an asymmetric carbon atom and are effective for controlling the liquid crystal state of a liquid crystal composition when added thereto.
摘要:
An optically active 2-fluoro-1-alkanol compound represented by the formula (Ia): ##STR1## wherein R is an alkyl group having 1-16 carbon atoms, and C* is an asymmetric carbon atom; and an optically active compound derived from the fluoroalkanol and represented by the formula (Ib): ##STR2## wherein R and C* are the same as above, m is 1 or 2, n is 0 or 1, and A is a releasable substituent. Because of the fluorine atom directly attached to an asymmetric carbon atom, these compounds are particularly effective in increasing a spontaneous polarization, improving a electric field responsive characteristic of a liquid crystal composition, and controlling the liquid crystal state.
摘要:
A fluoroalkane derivative represented by the formula: ##STR1## wherein R denotes an alkyl group having 1-16 carbon atoms, C* denotes an asymmetric carbon atom, R.sup.1 denotes an alkyl or alkoxy group having 1-16 carbon atoms; ##STR2## respectively denote a phenylene group ##STR3## a cyclohexylene group ##STR4## or a pyrimidinylene group ##STR5## p is 0 or 1, q is 0 or 1 when p is 1, r is 0 or 1; and l, m and n are respectively 0 or a positive integer satisfying the relationship of l+m+n.gtoreq.1. The fluoroalkane derivative has a fluorine atom providing a large dipole moment and directly connected to an asymmetric carbon atom, so that it provides a high speed responsive characteristic through an increased spontaneous polarization when contained in a liquid crystal composition, especially a ferroelectric liquid crystal composition.
摘要:
An optically active 2-fluoro-1-alkanol compound represented by the formula (Ia): ##STR1## wherein R is an alkyl group having 1-16 carbon atoms, and C* is an asymmetric carbon atom; and an optically active compound derived from the fluoroalkanol and represented by the formula (Ib): ##STR2## wherein R and C* are the same as above, m is 1 or 2, n is 0 or 1, and A is a releasable substitutent. Because of the fluorine atom directly attached to an asymmetric carbon atom, these compounds are particularly effective in increasing a spontaneous polarization, improving a electric field responsive characteristic of a liquid crystal composition, and controlling the liquid crystal state.