This invention provides novel ester compounds represented by the following general formula (1): ##STR1## (wherein R.sup.1 and R.sup.2 are alkyl groups and may be the same or not, A and B are selected from a single bond and --COO--, X is selected from ##STR2## optically active bodies thereof and liquid crystal compositions containing at least one of these compounds.
本发明提供了新型
酯类化合物,其通式如下:
其中,R1和R2是烷基,并且可以相同也可以不同,A和B是从单键和--COO--中选择,X是从下列结构中选择:
其中,R3和R4是烷基,R5是烷基或环烷基,n是0或1,m是1或2。本发明还提供了这些化合物的光学活性体和至少含有这些化合物之一的液晶组合物。