Dibenzofurans and dibenzothiophenes

US11485723B2 · kind B2 · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Dmitry USHAKOV · Kohlenbissen, DE
• Beate Schneider · Seeheim-Jugenheim, DE
• Carsten Fritzsch · Darmstadt, DE
• Dagmar Klass · Darmstadt, DE

Key dates

• Filing date: Oct 16, 2018
• Grant date: Nov 1, 2022
• Expiry date: Aug 24, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2219/11
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to dibenzofuans and dibenzothiophenes thiophenes of formula I in which the occurring groups and parameters have the meanings as indicated in claim 1, to liquid-crystalline media comprising same and to high-frequency components comprising these media, especially microwave components for high-frequency devices, such as devices for shifting the phase of microwaves, in particular for microwave phased-array antennas.