| 摘要 |
New condensed aromatic carbo- and heterocyclic cpds. with 1 or 2 aliphatic 5-membered rings attached to an aromatic 6-membered ring are of formula R<1)<-A<1>)a-(M<1>)b-(A<2>)c-(M<2>)d-B-(M<3>)e</SB >-(A<3>)f-(M<4>)g-(A<4>)h-R<2> (I). In (I), B = an aromatic gp. of formula (IIA) or (IIB); R<1>, R<2> = H; CN; F; Cl; CF3; CHF2; CH2F; OCF3; OCHF2; OCH2F; 1-20 C alkyl (opt. with asymmetrical C atom), in which 1 or more CH2 gps. may be replaced by -O-, -S-, -CO-, -CS-, -CH=CH=, -C IDENTICAL C-, cyclopropylene, -SiMe2-, 1,4-phenylene, trans-1,4-cyclohexylene or trans-1,3-cyclopentylene, without adjacent O and/or S atoms, and/or 1 or more H atoms may be substd. by F, Cl, Br, OR<2>, SCN, OCN or N3; or a chiral gp. of formulae (IIIA-P), R<4>-CH(X)-Q-O- (IIIQ) or R<4>-O-CH(Me)-Q-O- (IIIR); R<3-7> = H; 1-6C alkyl (opt. with asymmetrical C atom), in which 1 or more CH2 gps. may be replaced by -O- or -CH=CH-, without adjacent O atoms, and/or 1 or more H atoms may be substd. by F or Cl; or R<4> + R<5> = -(CH2)4- or -(CH2)5- if attached to an oxiran, dioxolan, tetrahydrofuran, tetrahydropyran, butyrolactone or valerolactone system; Q<1-4> = Q, CF2, N-R<3>, S or O; P<1-3> = C-H, C-F or N; M<1-4> = -O-, -S-, -CO-, -CO-O-, -O-CO-, -O-CO-O-, -CO-S-, -S-CO-, -CS-O-, -O-CS-, -S-CS-S-, -O-CS-O-, -S-CO-S-, -CS-, -CH2-O-, -O-CH2-, -CH2-S-, -S-CH2-, -CH=CH-, -C IDENTICAL C-, -O-CO-C IDENTICAL C-, -C IDENTICAL C-COO-, -O-CO-CH=CH-, -CH=CH-COO-, -O-CO-CH2-CH2-, -CH2=CH2-COO-, -O-CH2-C IDENTICAL C-, -C IDENTICAL C-CH2-O-, -O-CH2-CH=CH-, -CH=CH-CH2-O-, -O-CH2-CH2-CH2-, -CH2-CH2-CH2-O- or a single bond; A<1-4> = 1,4-phenylene, opt. with F, Cl and/or CN substit(s): pyrazin-2,5-diyl, pyridazin-3,6-diyl, pyridin-2,5-diyl, or pyrimidin-2,5-diyl, opt. mono- or di- substd. by F, Cl and/or CN; trans-1,4-cyclohexylene, opt. mono- or di-substd. by CN and/or Me; (1,3,4)-thiadiazol-2,5-diyl; 1,3-dioxan-2,5-diyl; 1,3-dithian- 2,5-diyl; 1,3-thiazol-2,4-diyl, 1,3-thiazol-2,5-diyl or thiophen-2,4-diyl, opt,. mono-substd. by F, Cl and/or CN; thiophen-2,5-diyl, opt. mono- or di-substd. by F, Cl, and/or CN; piperazin-1,4- or -1,5-diyl; naphthalen-2,6-diyl or bicyclo(2.2.2)octan-1,4-diyl, opt. with F, Cl and/or CN substit(s); 1,3-dioxaborinan-2,5-diyl; or a B gp.; a, b, c, d, e, f, g, h = 0 or 1; X = Cl, F or CN; Q = -CO- or -CH2-; if B = (IIA; P<1> = P<2> = P<3> = CH; Q<1> = Q<2> = CH2), one of the R gps. must contain a -SiMe2-, cyclopropylene, (IIIA) and/or (IIIB) gp. The claims also cover the use of (I) in liquid crystal (LC) mixts. (IV); (IV) per se; and the use of (IV) in electrooptical switches and displays. |
