申请人:Clariant International Ltd.
公开号:US06616989B1
公开(公告)日:2003-09-09
Isoxazole derivatives of the formula (I)
where the symbols and indices have the following meanings, for example:
T is
X is S or O
R1 and R2 are identical or different and are each hydrogen, F, CN or a straight-chain or branched C1-C20-alkyl or C2-C20-alkenyl radical (with or without asymmetric carbon atoms),
A1 and A2 are undirected and identical or different and are each phenylene-1,4-diyl,
M1 is undirected and is —OC(═O)—, —OCH2—, —SC(═O)—, —SCH2—, —CH2CH2—, —OC(═O)CH2CH2—, —OCH2CH2CH2—, —C≡C—, —(CH2)4— or a single bond;
a is 0 or 1,
are used in liquid-crystal mixtures.
公式(I)的异唑啉衍生物,其中符号和指数的含义如下,例如:T为X为S或OR1,R2是相同或不同的氢、F、CN或直链或支链C1-C20-烷基或C2-C20-烯基基团(带有或不带有不对称碳原子),A1和A2是未定向的,相同或不同,每个是苯基-1,4-二基苯基,M1是未定向的,是-OC(═O)-,-OCH2-,-SC(═O)-,-SCH2-,-CH2CH2-,-OC(═O)CH2CH2-,-OCH2CH2CH2-,-C≡C-,-(CH2)4-或单键;a为0或1,在液晶混合物中使用。