申请人:Hoechst Aktiengesellschaft
公开号:US05629428A1
公开(公告)日:1997-05-13
3-Chloropyridines, process for their preparation, and their use in liquid-crystal mixtures A 3-chloropyridine of the formula (I) ##STR1## in which the symbols have the following meaning: R.sup.1 and R.sup.2, independently of one another, are, for example, H or straight-chain or branched alkyl, A.sup.1, A.sup.2, A.sup.3 and A.sup.4 are identical or different and are, for example, 1,4-phenylene, pyrazine-2,5-diyl or trans-1,4-cyclohexylene, M.sup.1, M.sup.2, M.sup.3 and M.sup.4 are identical or different and are, for example, --O-- or --CO--O--, R.sup.3, R.sup.4, R.sup.6 and R.sup.7, independently of one another are, for example, H or straight-chain or branched alkyl, M.sup.5 is, for example, --O--CO-- or a single bond, k, l, m, n, o, p, q and r are zero or one, with the proviso that the sum k+m+p+r is less than 4 and greater than zero, can advantageously be employed as a component in ferroelectric liquid-crystal mixtures.
3-氯吡啶的制备方法及其在液晶混合物中的应用。式(I)表示3-氯吡啶,其中符号的含义如下:R.sup.1和R.sup.2独立地是H或直链或支链烷基;A.sup.1,A.sup.2,A.sup.3和A.sup.4相同或不同,例如1,4-苯二亚甲基,吡嗪-2,5-二基或反-1,4-环己二亚甲基;M.sup.1,M.sup.2,M.sup.3和M.sup.4相同或不同,例如--O--或--CO--O--;R.sup.3,R.sup.4,R.sup.6和R.sup.7独立地是H或直链或支链烷基;M.sup.5例如为--O--CO--或单键;k,l,m,n,o,p,q和r为零或一,但须满足k+m+p+r小于4且大于零,可以作为铁电液晶混合物的组分。