Optically active compound having a plurality of asymmetric carbon atoms

Details

Inventors: Ohno, Kouji; Saito, Shinichi; Inoue, Hiromichi; Miyazawa, Kazutoshi; Ushioda, Makoto;
Assignee: Chisso Corporation (Osaka, JP)
Primary Examiner: Maples; John S.
Assistant Examiner: Tucker; Philip
Attorney, Agent or Firm: Wenderoth, Lind & Ponack

An optically active compound having particularly a specific feature of increasing spontaneous polarization value as one of important specific features for ferroelectric liquid crystal compositions, and a ferroelectric liquid crystal composition containing the compound are provided, which compound is expressed by the formula ##STR1## wherein R.sup.1 represents a linear or branched chain alkyl, alkoxy, alkanoyl, alkoxycarbonyl or alkoxycarbonyloxy each of 1 -15C, H, halogen or -CN; R.sup.2 represents an optically active group having 2-20 skeletal atoms, ##STR2## wherein X represents H, halogen or -CN; l represents an integer of 1-10; m is 0 or 1; and * indicates asymmetric C.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS In the above formula (I), R.
sup.
1 is preferably a linear chain alkyl group or alkoxy group each of 4 to 14 carbon atoms.
Representative examples of the optically active group R.
sup.
2 are an optically active monohalogenated alkyl group or an alkyl group having an alkoxy branch each of 2 to 20 carbon atoms.
Examples of the monohalogenated alkyl group are ##STR5## In these formulas, X represents F, Cl or Br; and R.
sup.
3 represents a linear or branched chain alkyl group each of 1 to 15 carbon atoms and when R.
sup.
3 represents a branched chain alkyl group, it may be an optically active group.
Preferred examples of R.
sup.
2 wherein R.
sup.
3 represents a linear chain alkyl group and X represents a halogen atom are ##STR6## Further, preferred examples of R.
sup.
2 wherein R.
sup.
3 represents an optically active alkyl group and X represents a halogen atom are ##STR7## Further, preferred examples of R.
sup.
2 in the case of an alkyl group having an alkoxy branch are ##STR8## wherein R.
sup.
3 is as defined above and R.
sup.
4 represents a linear or branched chain alkyl group each of 1 to 10 carbon atoms and when R.
sup.
4 represents a branched chain alkyl group, R.
sup.
4 may be an optically active group.
Preferred examples of R.
sup.
2 wherein R.
sup.
3 and R.
sup.
4 are both a linear chain alkyl group are ##STR9## Preferred examples of R.
sup.
2 wherein R.
sup.
4 represents an optically active alkyl group are ##STR10## Preferred examples of R.
sup.
2 wherein R.
sup.
3 represents an optically active alkyl group and R.
sup.
4 represents a linear chain alkyl group are ##STR11## etc.
Preferred examples of R.
sup.
2 wherein R.
sup.
3 and R.
sup.
4 both represent an optically active alkyl group are ##STR12## Further, preferred examples of ##STR13## are ##STR14## Among these, more preferred examples are ##STR15## The specific feature of the compound expressed by the formula (I) of the present invention consists in that the compound has a large spontaneous polarization value (Ps) or potential spontaneous polarization value

Related patents

	Ionophore-containing ferroelectric liquid crystal mixtures What is claimed is: 1. A ferroelectric liquid crystal mixture composed of at least two components, which contains as one component at least one ionophore of the general ...
	Ointment applicator OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1-6 of the drawing, a medication ointment applicator bandage 10 according to one embodiment of the invention comprises ...
	Implantable hydraulic penile erector We claim: 1. An implantable hydraulic penile erectile device, comprising: a pair of compression means engageable with the crura of the penis for compressing said crura ...
	Process for producing microparticulated protein and the product thereof I claim: 1. A microparticle which comprises egg white proteins; the microparticle having a particle size of from about 0.5 to 3.0 .mu.m; the microparticle having a dense ...
	Free-flowing detergent powder compositions containing sodium perborate monohydrate We claim: 1. A method for preparing a free-flowing detergent powder comprising: (i) selecting sodium perborate monohydrate having physical characteristics of specific ...
	Alpha-hydroxy carboxylic acid derivates suitable for use in liquid crystal materials and devices We claim: 1. A lactic acid derivative having the formula: ##STR127## wherein R.sub.1 is alkyl or alkoxy an R.sub.2 is alkyl, the total number of carbon atoms in R.sub.1 ...

0.014
Archive: All patents - Links Copyright (c)2006 Eipa-patents.org - All rights reserved