| 摘要 |
<p>PCT No. PCT/GB96/03121 Sec. 371 Date Oct. 22, 1997 Sec. 102(e) Date Oct. 22, 1997 PCT Filed Dec. 18, 1996 PCT Pub. No. WO97/23541 PCT Pub. Date Jul. 3, 1997Materials of formula (I) are provided, wherein X1-X5 are independently selected from H, F, Cl, NO2, CF3, OR, R, SR, +545 CO- or +545 CO- where R is C1-15 branched or straight chain alkyl; provided that one of X1-X5 is selected from +545 CO- or +545 OC-; p is at least 2; W=single bond, phenyl, fluorinated phenyl, =, 3BOND , cyclohexyl, thiophene, CO, OC; T1, T2, T3, T4 are independently selected from H, F, Cl, NO2, CF3, OR, R, SR, where R is C1-15 branched or straight chain alkyl; g=0 or 1; X is selected from CO2 and OOC; n is selected from 1-5; m is selected from 1-20, Y is selected from O, S, CH2, CO2, OOC; Q is CH2 and when m is greater than 1 then non-adjacent CH2 groups may be substituted by O or S; rings A, B and C are independently selected from phenyl, cyclohexyl and pyrimidine and may be independently of each other substituted with at least one of Cl or F; linking groups A and B may be selected from single bond CO2, OOC provided that if ring B is not present then at least one of A or B is a single bond; Z is selected from CN, F, Cl, NO2, R, OR, CO2R, CF3, OOCR, NCS, SCN, where R=straight chain or branched chain alkyl and may include from 1-16 carbon atoms and including where one or more non-adjacent CH2 groups may be substituted by CH(CN), CH(CF3), CH(Cl), CH(CH3) in chiral or non-chiral form.</p> |
