Oxazolidinone derivatives, and the use thereof as dopes in liquid-crystal mixtures

US5310499A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Gunter Scherowsky · Berlin, DE
• Michael Sefkow · Potsdam, DE
• Gerd Illian · Tokyo, JP
• Rainer Wingen · Hattersheim, DE

Key dates

• Filing date: Jul 19, 1991
• Grant date: May 10, 1994
• Expiry date: Jul 19, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K19/3497
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Chiral oxazolidinones of the formula (I) or (II) ##STR1## in which R.sup.1 is, for example, a straight-chain or branched alkyl radical having 1 to 16 carbon atoms or PA0 R.sup.2 and R.sup.3 are, for example, --H, --CH.sub.3 or phenyl, PA0 j, 1 and n are zero, 1 or 2, PA0 k and m are zero or 1, PA0 A.sup.1, A.sup.2 and A.sup.3 are, for example, phenyl or cyclohexyl, PA0 M.sup.1 and M.sup.2 are, for example, COO or CH.sub.2 O, and PA0 X is, for example, CH.sub.2 or COO, are suitable as dopes in liquid-crystal mixtures. They result in liquid-crystalline ferroelectric phases having short response times. A further advantage is that the oxazolidinones induce a helix of very low pitch, so that they are also suitable for helix compensation in LC mixtures.