Cyclopropylaklyl or -alkenyl or heterocyclic compounds, process for their preparation and their use in liquid-crystalline mixtures

US5407599A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Armin de Meijere · Oebisfelde, DE
• Hans-Rolf Dubal · Königstein, DE
• Claus Escher · Mühltal, DE
• Wolfgang Hemmerling · Pocking, DE
• Ingrid Muller · Niedernhausen, DE
• Dieter Ohlendorf · Liederbach, DE
• Rainer Wingen · Hattersheim, DE
• Takamasa Harada · Oberursel, DE
• Gerhard Illian · Frankfurt am Main, DE
• Mikio Murakami · Kakegawa, JP

Key dates

• Filing date: Oct 4, 1993
• Grant date: Apr 18, 1995
• Expiry date: Oct 4, 2013

Classification

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

Abstract

Disclosed and claimed are liquid-crystalline cyclopropylalkyl or -alkenyl or heterocyclic compounds, process for their preparation, and their use in liquid-crystalline mixtures. The novel cyclopropylalkyl or -alkenyl or heterocyclic compounds are of the general formula ##STR1## In this formula A.sup.1, A.sup.2 and A.sup.3 are unsubstituted or substituted, aromatic or heteroaromatic molecular components such as 1,4-phenylene or pyrimidine-2,5-diyl which are linked via a single bond (in the case where k and m=0) or via functional groups M.sup.1 and M.sup.2, such as CO--O or CH.sub.2 --O; j, k, l, m and n are zero, 1 or 2. The radicals R.sup.2, R.sup.3 and R.sup.4 are H or alkyl/alkenyl, R.sup.1 is alkyl/alkenyl or one of the substitutents known from LC chemistry such as an .alpha.-haloalkanoic acid radical. At least one of the components A.sup.1, A.sup.2 and A.sup.3 can be heteroaromatic, and G is alkylene or alkenylene.