Biphenylylethanes

US5093026A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• David I. Bishop · Poole, GB
• Stephen J. Lewis · Bournemouth, GB
• David Coates · Bishop's Stortford, GB
• Simon Greenfield · Poole, GB
• Eike Poetsch · Mühltal, DE
• Volker Meyer · Groß-Zimmern, DE
• Klaus P. Stahl · Darmstadt, DE
• Volker Reiffenrath · Roßdorf, DE
• Herbert Plach · Darmstadt, DE
• Reinhard Hittich · Seeheim-Jugenheim, DE
• Andreas Wachtler · Griesheim, DE

Key dates

• Filing date: Apr 2, 1990
• Grant date: Mar 3, 1992
• Expiry date: Apr 2, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2601/14
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Biphenylylethanes of the formula I, EQU R.sup.1 --CH.sub.2 --X--(CH.sub.2 CH.sub.2).sub.m --Ph--Ph--CH.sub.2 CH.sub.2 --Ph--Y--CH.sub.2 --R.sup.2 I in which PA1 R.sup.1 and R.sup.2 are each, independently of one another, alkyl, alkenyl or oxaalkyl having up to 12 C atoms, and one of the radicals R.sup.1 and R.sup.2 is alternatively H, PA1 m is 0 or 1, PA1 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 PA1 is 1,4-phenylene, and one or two of the radicals 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=0 and one or two of the radicals Ph are 2- or 3-fluoro-1,4-phenylene, are suitable as components of liquid-crystalline phases.