公开(公告)号：EP0301021B1

公开(公告)日：1991-08-14

申请号：EP87902583.1

申请日：1987-04-01

申请人： SECRETARY OF STATE FOR DEFENCE IN HER BRITANNIC MAJESTY'S GOV. OF THE UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND

发明人： GRAY, George, William ,  LACEY, David ,  TOYNE, Kenneth, Johnson ,  SCROWSTON, Richard, Michael ,  MING, Lawrence, Kam ,  BRADSHAW, Madeline, Joan ,  BRIMMELL, Victoria

IPC分类号： C07C233/05 ,  C07C233/07 ,  C07D211/16 ,  C07D231/12 ,  C07D295/18 ,  C09K19/12 ,  C09K19/20 ,  C09K19/34

CPC分类号： C07D295/18 ,  C07D231/12 ,  C09K19/126 ,  C09K19/2021 ,  C09K19/2028 ,  C09K19/3441 ,  C09K19/348 ,  C09K19/3483

摘要： Novel amides of formula (I), where X is (II), and Y is (III), Z1, Z2 are -O- or NR°, R° being C1-12 alkyl or H, R1 is H, alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, halogen, cyano, R°COOCH(CH3)COO, R°OOCCH(CH3)OOC; A, B are -, OOC, COO, CH2CH2, -N=N-, -N(O)=N-; a, b, c, f, g, y are 0 or 1; R is CH3 or phenyl; D, E are H, alkyl, Y'-alkyl, Y''-alkoxy, or D and E together with the N represent the residue of an N-containing heterocyclic group; and (alpha) to (gamma) represent cyclic groups. Such compounds may be used in ferroelectric smectic liquid cystal mixtures, especially as pitch compensators. Preferred amides have y as O and X-CO-Z1-CH(R)- as formulae (IV) or (V). A liquid crystal composition and device using these amides are described.