申请人:CHISSO CORPORATION
公开号:EP1182186A2
公开(公告)日:2002-02-27
The present invention provides a difluoromethyl ether derivative which shows various suitable physical properties as a liquid crystal compound, a liquid crystal composition comprising the compound and a liquid crystal display element containing the composition, and also provides a simple and efficient process for producing the difluoromethyl ether derivative.
According to the present invention, the process for producing a difluoromethyl ether derivative represented by Formula (1d):
wherein R1 and R2 each independently represent hydrogen, halogen, a cyano group or an alkyl group having 1 to 20 carbon atoms, in which at least one -CH2- may be substituted with -O-, -S-, -CH=CH- or -C≡C- but -O- is not adjacent to another -O-, and in which any hydrogen may be substituted with fluorine;
rings A1, A2, A3 and A4 each independently represent a 1,4-cyclohexylene group in which at least one -CH2- may be substituted with -O- or -S-, or a 1,4-phenylene group in which at least one =CH- may be substituted with =N- and at least one hydrogen on the ring may be substituted with fluorine, a cyano group or an alkyl group having 1 to 10 carbon atoms;
Z1, Z2, Z3 and Z4 each independently represent a single bond or an alkylene group having 1 to 4 carbon atoms, in which at least one -CH2- may be substituted with -O-, -S-, -CH=CH- or -C≡C- but -O- is not adjacent to another -O-, and in which any hydrogen may be substituted with fluorine;
Y1, Y2, Y3 and Y4 each independently represent hydrogen, halogen, a cyano group or an alkyl group having 1 to 10 carbon atoms; and
k, l, m and n each independently represent 0 or 1; is characterized by using an α,α-difluorocyclohexylidene derivative represented by Formula (1a):
wherein R1, rings A1 and A2, Z1, Z2, k and 1 have the same meanings as defined above; as a starting material.
本发明提供了一种二氟甲基醚衍生物,其作为液晶化合物具有各种适宜的物理性质,以及包含该化合物的液晶组合物和含有该组合物的液晶显示元件,同时提供了一种简单高效的制备二氟甲基醚衍生物的方法。根据本发明,制备式(1d)所表示的二氟甲基醚衍生物的方法包括使用式(1a)所表示的α,α-二氟环己烯基衍生物作为起始物质,其中R1和R2分别独立地表示氢、卤素、氰基或具有1至20个碳原子的烷基,其中至少一个-CH2-可以被取代为-O-、-S-、-CH=CH-或-C≡C-但-O-不与另一个-O-相邻,并且其中任何氢可以被氟取代;环A1、A2、A3和A4分别独立地表示至少一个-CH2-可以被取代为-O-或-S-的1,4-环己基烷基,或者至少一个=CH-可以被取代为=N-且环上至少一个氢可以被氟、氰基或具有1至10个碳原子的烷基取代的1,4-苯基烷基;Z1、Z2、Z3和Z4分别独立地表示单键或具有1至4个碳原子的烷基,在其中至少一个-CH2-可以被取代为-O-、-S-、-CH=CH-或-C≡C-但-O-不与另一个-O-相邻,并且其中任何氢可以被氟取代;Y1、Y2、Y3和Y4分别独立地表示氢、卤素、氰基或具有1至10个碳原子的烷基;k、l、m和n分别独立地表示0或1。