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    • 5. 发明授权
    • Optically active naphthalene derivatives
    • 光学活性萘衍生物
    • US5072021A
    • 1991-12-10
    • US467300
    • 1990-01-16
    • Masakatsu NakatsukaTsutomu Nishizawa
    • Masakatsu NakatsukaTsutomu Nishizawa
    • C07C69/75C07C69/773C07C69/92C07C69/94C09K19/32C09K19/58
    • C07C69/94C07C69/75C07C69/92C09K19/322C09K19/584C07C2101/14
    • The present invention is directed to optically active compounds each containing a naphthalene skeleton, and to liquid crystal compositions which contain the aforesaid optical active compounds, these compositions being suitable for ferroelectric liquid crystal devices having excellent photostability and chemical stability and having a rapid responsivity. The compounds of the present invention are represented by the general formula ##STR1## wherein X is a hydrogen atom, a halogen atom, a cyano group, an alkyl group or a methoxy group, the latter two groups each having 1 or 2 carbon atoms; and A and B are independently represented by following formula and at least one of them contains an asymmetric carbon atom ##STR2## wherein C and D rings are independent and each of them is a 1,4-phenylene, 2,6-naphthylene, pyrimidine-2,5-diyl, trans-1,4-cyclohexylene, trans-1,3-dioxane-2,5-diyl, trans-1,3-oxathian-2,5-diyl, trans-1,3-dithian-2, 5-diyl or 1,3,2-dioxaborinane-2,5-diyl group; each of m and n is an integer of 0, 1 or 2; each of Z.sub.1, Z.sub.2, Z.sub.3 and Z.sub.4 is a bonding group of one or more selected from the group consisting of a single bond, --C(O)--, --O--, --CH.sub.2 --, --CH.dbd.N--, --N.dbd.CH--, --CH.dbd.CH--, --C.tbd.C--, --N.dbd.N-- and --N(O).dbd.N--; and Y is a hydrogen atom, a halogen atom, a cyano group, a straight-chain or branched alkyl group or an alkenylalkyl group, the latter two groups each having 1 to 20 carbon atoms.
    • 本发明涉及各自含有萘骨架的光学活性化合物和含有上述光学活性化合物的液晶组合物,这些组合物适用于具有优异的光稳定性和化学稳定性并且具有快速响应性的铁电液晶装置。 本发明的化合物由通式(I)表示,其中X是氢原子,卤原子,氰基,烷基或甲氧基,后两个基团各自具有1或2个 碳原子 A和B独立地由下式表示,并且它们中的至少一个含有不对称碳原子,其中C和D环是独立的,并且它们各自是1,4-亚苯基,2,6-亚萘基,嘧啶 -2,5-二基,反式-1,4-亚环己基,反式-1,3-二恶烷-2,5-二基,反式-1,3-氧硫杂-2,5-二基,反式-1,3-二噻烷 -2,5-二基或1,3,2-二氧杂硼烷烷-2,5-二基; m和n各自为0,1或2的整数; Z 1,Z 2,Z 3和Z 4中的每一个是选自单键,-C(O) - , - O - , - CH 2 - , - CH = N - , - N = CH-,-CH = CH - , - C 3BOND C - , - N = N-和-N(O)= N-; Y是氢原子,卤素原子,氰基,直链或支链烷基或链烯基烷基,后两个基团具有1至20个碳原子。