Biphenylylethanes

Details Biphenylylethanes Biphenylylethanes

C - Chemistry, Metallurgy

07

C

31/105, 260/653.

C07C 25/18 (2006.01) C07C 15/18 (2006.01) C07C 43/205 (2006.01) C07C 43/225 (2006.01) C09K 19/12 (2006.01) C09K 19/14 (2006.01) C09K 19/30 (2006.01) G02F 1/13 (2006.01)

Patent

CA 2026112

- 22 - Abstract Biphenylylethanes of the formula I, R1-CH2-X-(CH2CH2)m-Ph-Ph-CH2CH2-Ph-Y-CH2-R2 I in which R1 and R2 are each, independently of one another, alkyl, alkenyl or oxaalkyl having up to 12 C atoms, and one of the radicals R1 and R2 is alter- natively H, m is 0 or 1, X and Y are each, independently of one another, O, S, CO-O, O-CO, O-CO-O or a single bond, the radical X is alternatively 1,4-phenylene or trans-1,4-cyclohexylene, and the radical Y is alternatively trans-1,4-cyclohexylene, and Ph is 1,4-phenylene, and one or two of the radi- cals Ph is alternatively 2- or 3-fluoro-1,4- phenylene, with the proviso that, in the case (a) where X = 1,4- phenylene and m = 1, one or two of the radicals Ph are 2- or 3-fluoro-1,4-phenylene, and (b) in the case where X = trans-1,4-cyclohexylene, m = o and one or two of the radicals Ph are 2- or 3-fluoro-1,4-phenylene, are suit- able as components of liquid-crystalline phases.

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