| 摘要 |
Thieno(2,3-b)thiophene derivs. of formula (I) are new: R<1>(-M<1>)a(-A<1>)b(M<2>)c(-A<2>)d(M<3>)e-Thi-(-M<4>)f(A<3>)g (-M<5>)h(-A<4>)i(-M<6>)k-R<2> (I); Thi = a substd. thieno(2,3-b)thiophen-2,5-diyl gp. of the formula (i) X = F, CF3, CHF2, CH2F or Me; R<1>, R<2> = (a) H, -CN, F, Cl, -CF3, -CHF2, -CH2F, -OCF3 or -OCH2F; (b) 1-20 C alkyl, opt. with asymmetrical C atom, in which CH2 gp(s). may be replaced by -O-, -S-, -CO-, -CS-, -CH=CH-, -C?=C-, cyclopropan-1,2-diyl, -SiMe2-, 1,4-phenylene (Phe), trans-1,4-cyclohexylene (Cyc) or trans-1,3-cyclopentylene, without directly bound O and S atom, and/or with F, Cl, Br, -OR<3>, -SCN, -OCN or -N3 substit(s).; or (c) an (optically active or racemic) gp. of formula (IIA-R): R<3-7> = H; 1-16C alkyl (opt. with an asymmetrical C atom), in which 1 or more CH2 gps. may be replaced by -O- and/or -CH=CH-, without directly linked O atoms, and/or with 1 or more F or Cl substit(s).; or R<4> + R<5> = -(CH2)4- or -(CH2)5 if attached to an oxirane, dioxolane, tetrahydro-furan, tetrahydropyran, butyrolactone or valerolactone system; Y = Cl, F or CN; Z = -CO- or -CH2-; M<1-6> = -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?=C- or a single bond; A<1-4> = 1,4-phenylene, pyridin-2,5-diyl (Pyd), naphthalen-2,6-diyl or bicyclo-(2.2.2)octan-1,4-diyl, opt. with 1 or more F, Cl and/or CN substit(s).; pyrazin-2,5-diyl, pyridazin-3,6-diyl, pyrimidin-2,5-diyl (Pyr) or thiophen-2,5-diyl, opt. with 1 or 2 F, Cl and/or CN substits.; 1,3-thiazol-2,4- or -2,5-diyl or thiophen-2,4-diyl, opt. with one F, Cl and/or CN substit.; Cyc, opt. with 1 or 2 CN and/or Me substits.; (1,3,4)-, (1,2,5)- or (1,2,4)-thiadiazol-2,5-diyl; 1,3-dioxan-2,5-diyl (Dio); 1,3-dithian-2,5-diyl; piperazin-1,4- or -2,5-diyl; or 1,3-dioxaborinan-2,5-diyl; a, b, c, d, e, f, g, h, i, k = 0 or 1. Also claimed are liquid crystal (LC) mixts. contg. (I).
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