Fluorine-containing pyrimidine derivatives

Details Fluorine-containing pyrimidine derivatives Fluorine-containing pyrimidine derivatives

1987-04-08

1989-03-14

Gron, Teddy S.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

2522995, 350350R, 350350S, 544242, 544298, 544315, 544316, 544318, 544334, 544335, G02F 113, C07D23926, C09K 1934

Patent

active

048122580

ABSTRACT:
Liquid crystalline fluorine-containing pyrimidine compounds have the formula I ##STR1## wherein R.sup.1 and R.sup.2 are H, R, OR or OCOR, and one of them can also be CN or F, or, if A is a covalent bond, also one or both of R.sup.1 and R.sup.2 can be 4-R.sup.4 -phenyl or 4-R-cyclohexyl, wherein R.sup.4 is R, OR, cyano, f or OCOR; wherein R is an alkyl group of 1 to 12 C atoms; R.sup.3 is F or, if one of the radicals R.sup.1 or R.sup.2 is F or 4-fluorophenyl, also H; Z is 1,3-pyrimidin-2,5-diyl; and A is 1,4-phenylene, 1,4-cyclohexylene or a covalent bond.
Fluorine-containing pyrimidine compounds are useful components of liquid crystal dielectrics for electro-optical display devices.

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