Compounds containing a fluorobiphenylyl group

US4594465A · kind A · utility

Assignees

• The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland · GB
• Merck Patent GmbH · DE

Inventors

• Lawrence Kam Ming Chan · Hope, GB
• George W. Gray · Corby, GB
• Kenneth J. Toyne · Cudworth, GB
• David Lacey · Hope, GB
• Rudolf Eidensschink · Munster, DE
• Michael C. Romer · Rodgau, DE

Key dates

• Filing date: Jul 19, 1984
• Grant date: Jun 10, 1986
• Expiry date: Jul 19, 2004

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2019/123
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Novel terphenyls having a relatively high clearing point and which are suitable for use in liquid crystal materials or in the preparation of compounds for use in such material are characterised by a formula: ##STR1## wherein: R.sub.1 is selected from H, alkyl, alkoxy, alkylcarbonyl, alkylcarbonyloxy and alkoxycarbonyloxy; PA1 R.sub.2 is selected from H, alkyl, alkoxy; PA1 X.sub.1 is selected from H and fluorine; PA1 X.sub.2 is selected from H and fluorine; and ##STR2## is selected from ##STR3## and ##STR4## provided that one of X.sub.1 and X.sub.2 is fluroine. Compounds wherein ##STR5## is ##STR6## or ##STR7## are generally useful as liquid crystal compounds.