1,1,1-Trifluoro-2-hydroxy-5-benzyloxy compounds represented by the following formula (I) and optical isomers thereof: ##STR1## The compounds of the present invention are R-form and S-form when X is --C.tbd.C-- and are trans-form and cis-form both of which have respectively R-form and S-form when X is --CH.dbd.CH-- or ##STR2## ##STR3## the compound of the present invention is ##STR4## The compounds of the present invention are useful for asymmetric introduction of trifluoromethyl group and molecular designing of biologically active substances, ferroelectric liquid crystal compounds and so on.
                            本发明的化合物是由以下公式(I)表示的1,1,1-三
氟-2-羟基-5-苄氧基化合物及其光学异构体:化合物为R-形式和S-形式,当X为--C.tbd.C--时,为反式和顺式形式,当X为--CH.dbd.CH--或时,分别具有R-形式和S-形式。本发明的化合物是。本发明的化合物可用于三
氟甲基基团的不对称引入和
生物活性物质、
铁电液晶化合物等的分子设计。