申请人:Hoechst Aktiengesellschaft
公开号:US05630962A1
公开(公告)日:1997-05-20
2-Fluoropyridines, processes for their preparation and their use in ferroelectric liquid crystal mixtures A 2-fluoropyridine of the formula (I) ##STR1## in which the symbols have the following meaning: R.sup.1, 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, A.sup.4, identical or different, are, for example, 1-phenylene, pyrazine-2,5-diyl or trans-1,4-cyclohexylene, M.sup.1, M.sup.2, M.sup.3, M.sup.4, identical or different, are, for example, --O-- or --CO--O--, R.sup.3, R.sup.4, R.sup.6, 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, r are zero or one, with the proviso that the sum of k+m+p+r is less than 4 and greater than zero, can advantageously be used as a component in ferroelectric liquid crystal mixtures.
2-氟吡啶,其制备方法及其在铁电液晶混合物中的应用。式(I)的2-氟吡啶,其中符号具有以下含义:R1,R2,相互独立地,例如为H或直链或支链烷基;A1,A2,A3,A4,相同或不同,例如为1-苯基,吡啶-2,5-二基或反-1,4-环己基;M1,M2,M3,M4,相同或不同,例如为--O--或--CO--O--;R3,R4,R6,R7,相互独立地,例如为H或直链或支链烷基;M5,例如为--O--CO--或单键;k,l,m,n,o,p,q,r为零或一,但要求k+m+p+r的总和小于4且大于零,可优选地用作铁电液晶混合物中的组分。