Use of optically active tetrahydrofuran-2-carboxylic acid esters

Details Use of optically active tetrahydrofuran-2-carboxylic acid esters Use of optically active tetrahydrofuran-2-carboxylic acid esters

1993-05-20

1995-01-24

Tucker, Philip

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

544318, 544298, 544335, 546268, 546275, 546276, 546277, 546290, 546296, 546301, 546339, 546342, 548128, 548129, 549357, 549473, 549499, 549502, C09K 1934

Patent

active

053840704

ABSTRACT:
The use of optically active tetrahydrofuran-2-carboxylic acid esters as dopants in liquid-crystal mixtures, liquid-crystal mixtures containing same and novel optically active tetrahydrofuran-2-carboxylic acid esters.
Optically active tetrahydrofuran-2-carboxylic acid esters containing a mesogenic molecular building unit are suitable as dopants in liquid-crystal mixtures. They result in liquid-crystalline ferroelectric phases having short switching times and in electroclinic phases having large electroclinic coefficients. A further advantage is that they induce a helix having a very small pitch so that they are also suitable for helix compensation in LC mixtures.
The compounds are symbolized by the general formula: ##STR1## in which the symbols and indices essentially denote: R.sup.1 =alkyl/alkenyl or tetrahydrofurancarbonyloxy or -thio; j, l, n=zero, 1 or 2; k, m=zero or 1; --A.sup.1, --A.sup.2, --A.sup.3 =phenylene, cycloalkylene or corresponding heterocyclates containing nitrogen, oxygen or sulfur; --M.sup.1, --M.sup.2 =bridges such as --CO--O, --OCH.sub.2 or --CH.dbd.CH; X=oxygen or sulfur.

REFERENCES:
patent: 4873019 (1989-10-01), Krause et al.
Chemical Abstracts, vol. 103, No. 46 339r.
Chemical Abstracts, vol. 103(3), No. 22 510m (Jul. 22, 1985).
Chemical Abstracts, vol. 109(16), No. 139 802a (Oct. 17, 1988).
Chemical Abstracts, vol. 94(24), No. 200 881r (Jun. 15, 1981).
Chemical Abstracts, vol. 103(6), No. 46 339r (Aug. 12, 1985).
Chemical Abstracts, vol. 104, No. 99 976y (1986).
J. W. Goodby et al., "Ferroelectric Liquid Crystals", pp. 133 and 244 (Philadelphia, 1991).

Affiliated with

Also associated with

Rating

Use of optically active tetrahydrofuran-2-carboxylic acid esters does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Use of optically active tetrahydrofuran-2-carboxylic acid esters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Use of optically active tetrahydrofuran-2-carboxylic acid esters will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1466678