Chiral alkenylaryl 2,3-epoxyalkyl ethers, and the use thereof in liquid-crystalline mixtures

US5360576A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Karsten Blatter · Lechenich, DE
• Claus Escher · Mühltal, DE
• Takamasa Harada · Oberursel, DE
• Peter Harnischfeger · Darmstadt, DE
• Wolfgang Hemmerling · Pocking, DE

Key dates

• Filing date: Jan 21, 1993
• Grant date: Nov 1, 1994
• Expiry date: Jan 21, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K19/588
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Compounds of the formula (I) in which the symbols have the following meanings: R.sup.1 is straight-chain or branched (C.sub.3 -C.sub.2)alkenyl containing a terminal double bond, it being possible for one or two non-adjacent CH.sub.2 groups to be replaced by O and/or S atoms, A and B, independently of one another, are phenyl, diazine-2,5-diyl or diazine-3,6-diyl, with the proviso that one of the groups A or B is phenyl and the other is diazine, X is O or S, R.sup.2, R.sup.3 and R.sup.4, independently of one another, are H, straight-chain (C.sub.1 -C.sub.10)alkyl or branched (C.sub.3 -C.sub.10 )alkyl, R.sup.2, R.sup.3 and R.sup.4 not simultaneously being H, have the property of increasing the phase width in CC mixtures or depressing the melting point.