3-Chloropyridines, and their use in liquid-crystal mixtures

US5629428A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Hubert Schlosser · Hofheim, DE
• Dietmar Jungbauer · Weiterstadt, DE
• Javier Manero · Frankfurt, DE

Key dates

• Filing date: May 10, 1994
• Grant date: May 13, 1997
• Expiry date: May 10, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K19/3444
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

3-Chloropyridines, process for their preparation, and their use in liquid-crystal mixtures A 3-chloropyridine of the formula (I) ##STR1## in which the symbols have the following meaning: R.sup.1 and R.sup.2, independently of one another, are, for example, H or straight-chain or branched alkyl, A.sup.1, A.sup.2, A.sup.3 and A.sup.4 are identical or different and are, for example, 1,4-phenylene, pyrazine-2,5-diyl or trans-1,4-cyclohexylene, M.sup.1, M.sup.2, M.sup.3 and M.sup.4 are identical or different and are, for example, --O-- or --CO--O--, R.sup.3, R.sup.4, R.sup.6 and R.sup.7, independently of one another are, for example, H or straight-chain or branched alkyl, M.sup.5 is, for example, --O--CO-- or a single bond, k, l, m, n, o, p, q and r are zero or one, with the proviso that the sum k+m+p+r is less than 4 and greater than zero, can advantageously be employed as a component in ferroelectric liquid-crystal mixtures.