Fluorine-containing pyrimidine derivatives

US4812258A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Joachim Krause · Dieburg, DE
• Michael C. Romer · Rodgau, DE
• Ludwig Pohl · Darmstadt, DE
• Bernhard Scheuble · Alsbach, DE
• Georg Weber · Langen (Hessen), DE

Key dates

• Filing date: Apr 8, 1987
• Grant date: Mar 14, 1989
• Expiry date: Apr 8, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K19/3469
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

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.