申请人:Hoffmann-La Roche Inc.
公开号:US05244597A1
公开(公告)日:1993-09-14
Optically active compounds of the formula ##STR1## wherein m stands for the number 1 and R.sup.2 is an unsubstituted or halogen-substituted alkyl or alkenyl group in which optionally one methylene group is replaced by oxygen and/or optionally one methylene group is replaced by an ester group --COO-- or --OOC--; or m stands for the number 0 or 1 and R.sup.2 denotes a group of the formula ##STR2## R.sup.1 and R.sup.3 each independently represent an alkyl or alkenyl group in which optionally one methylene group is replaced by oxygen; Z.sup.1, Z.sup.2 and Z.sup.3 each independently are a single covalent bond, --CH.sub.2 O--, --OCH.sub.2 --, --CH.sub.2 CH.sub.2 --, --COO-- or --OOC--; n stands for the number 0 or 1; rings A.sup.1 an A.sup.2 each independently are unsubstituted or halogen, cyano and/or methyl-substituted 1,4-phenylene in which optionally 1 CH group or 2 CH groups is/are replaced by nitrogen; and C* denotes a chiral carbon atom; with the proviso that simultaneously R.sup.1 does not are an alkyl group, m and n do not are the number 1, Z.sup.1 does not are the group --CH.sub.2 CH.sub.2 -- or --CH.sub.2 O-- and ring A.sup.1, Z.sup.2, ring A.sup.2 and R.sup.2 together do not are 4-(5-alkyl-2-pyrimidinyl)-phenyl, their preparation, liquid crystalline mixtures which contain these compounds and their use for electro-optical purposes.
式中光学活性化合物为##STR1## 其中m表示数字1,R.sup.2是未取代或卤素取代的烷基或烯基基团,其中可选地一个亚甲基被氧替换和/或可选地一个亚甲基被酯基--COO--或--OOC--替换;或m表示数字0或1,R.sup.2表示式##STR2##中的基团,其中R.sup.1和R.sup.3各自独立地表示烷基或烯基基团,其中可选地一个亚甲基被氧替换;Z.sup.1,Z.sup.2和Z.sup.3各自独立地是单一共价键,--CH.sub.2 O--,--OCH.sub.2--,--CH.sub.2 CH.sub.2--,--COO--或--OOC--;n表示数字0或1;环A.sup.1和A.sup.2各自独立地是未取代或卤素,氰基和/或甲基取代的1,4-苯撑基,其中可选地1个CH基或2个CH基被氮替换;C*表示手性碳原子;但要同时满足R.sup.1不是烷基,m和n不是数字1,Z.sup.1不是基团--CH.sub.2 CH.sub.2--或--CH.sub.2 O--,环A.sup.1,Z.sup.2,环A.sup.2和R.sup.2不是4-(5-烷基-2-嘧啶基)-苯基。本发明还涉及制备这些化合物的方法,含有这些化合物的液晶混合物以及它们在电光用途中的使用。