Liquid crystal compounds having a terminal 1-alkynyl residue

Details Liquid crystal compounds having a terminal 1-alkynyl residue Liquid crystal compounds having a terminal 1-alkynyl residue

1992-05-07

1993-11-23

Stoll, Robert L.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229961, 25229963, 585 25, 549369, 549372, C09K 1906, C09K 1934, C09K 1930, C07D31906

Patent

active

052641490

ABSTRACT:
Compounds of the formula ##STR1## wherein n stands for the number 0 or 1; rings A, B and C each independently represent trans-1,4-cyclohexylene, trans-1,3-dioxane-2,5-diyl or unsubstituted or fluoro-substituted 1,4-phenylene; R.sup.1 denotes 3E-alkenyl with 4 to 12 carbon atoms, 4-alkenyl with 5 to 12 carbon atoms or, when ring A represents trans-1,4-cyclohexylene or trans-1,3-dioxane-2,5-diyl, also 1E-alkenyl with 2 to 12 carbon atoms; and R.sup.2 is hydrogen or C.sub.1 -C.sub.10 -alkyl, their manufacture as well as liquid crystalline mixtures which contain such compounds and their use for electro-optical purposes.

REFERENCES:
patent: 4528114 (1985-07-01), Petrzilka
patent: 4613208 (1986-09-01), Boller et al.
patent: 4621901 (1986-11-01), Petrzilka et al.
patent: 4830470 (1989-05-01), Buchecker et al.
patent: 5171473 (1992-12-01), Buchecker et al.

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