Chiral compounds and their use as chiral dopants for producing cholesteric liquid crystal compositions

US6468444B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Frank Meyer · Mannheim, DE
• Peter Schuhmacher · Mannheim, DE
• Frank Prechtl · Frankfurt, DE

Key dates

• Filing date: Mar 20, 2000
• Grant date: Oct 22, 2002
• Expiry date: Mar 20, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2019/3095
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Chiral dopants of the formula IZ1—Y1—(A1)m—Y2—M—Y3—X—Y4—(A2)n—Y5—Z2  Iin which the variables have, independently of one another, the following meanings:A1 and A2 a spacer with a chain length of 1 to 30 carbon atoms;Y1 to Y5 a chemical bond, —O—, —S—, —C(═O)—, —C(═O)—O—, —O—C(═O)—, —CH═CH—C(═O)—O—, —O—C(═O)—O—, —C(═O)—N(R)— or —(R)N—C(═O)—, —CH2—O—, —O—CH2—, —CH═N—, —N═CH— or —N═N—;M a mesogenic group;R hydrogen, C1-C4-alkyl;Z1 and Z2 hydrogen, C1-C4-alkyl, a polymerizable group or a radical having a polymerizable group;x a dianhydrohexitol residue selected from the group consisting of dianhydrosorbitol, dianhydromannitol and dianhydroiditol;m/n 0 or 1,where the radicals Z1, Z2, Y1 to Y5, A1 and A2 can be identical or different, and at least one Z1 or Z2 radical is a polymerizable group or a radical having a polymerizable group, and t…