申请人:Showa Shell Sekiyu Kabushiki Kaisha
公开号:US05262086A1
公开(公告)日:1993-11-16
(R)- and (S)-enantiomer composition represented by the formula (I) having sufficient high optical purity for exhibiting optically tristable states in S*(3) phase; ##STR1## wherein Ra means a C.sub.5 -C.sub.14 alkyl group or a C.sub.5 -C.sub.14 alkoxy group, preferably a C.sub.5 -C.sub.14 alkyl group, Rb means a C.sub.4 -C.sub.12 normal alkyl group or a C.sub.4 -C.sub.12 branched alkyl group, X means a ##STR2## group or a ##STR3## group, Z means a fluorine containing alkyl group, preferably a trifluoromethyl group and * shows an optically active carbon.
根据您的要求,以下是对给定英文化学描述的中文翻译:
表示为公式(I)的(R)-和(S)-对映体组成,具有足够高的光学纯度,在S*(3)相中表现出光学三稳态;##STR1## 其中Ra表示一个C5-C14烷基团或一个C5-C14烷氧基团,优选为C5-C14烷基团,Rb表示一个C4-C12直链烷基团或一个C4-C12支链烷基团,X表示一个##STR2##基团或一个##STR3##基团,Z表示一个含氟烷基团,优选为三氟甲基团,而*表示一个光学活性碳原子。