Disubstituted pyrimidines

Details Disubstituted pyrimidines Disubstituted pyrimidines

1981-10-07

1984-07-31

Gron, Teddy S.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229963, 350350R, 544242, C09K 334, G02F 113, C07D23926

Patent

active

044629230

ABSTRACT:
Pyrimidines of the formula: ##STR1## wherein Y is nitrogen and Z is .dbd.CH--, or Z is nitrogen and Y is .dbd.CH--; R.sup.1 is alkyl and R.sup.2 is cyano, alkyl, p-alkylphenyl or trans-4-alkylcyclohexyl; where each alkyl denotes either a straight chain alkyl group of 1 to 12 carbon atoms or a branched chain alkyl group of the formula C.sub.2 H.sub.5 --CH(CH.sub.3)--(CH.sub.2).sub.n, n is 1, 2 or 3; with the proviso that the compound contains at most only one of said branched chain alkyl group and with the further proviso that the sum of the carbon atoms in all of the alkyl groups within the compound is at most 14
are described. Liquid crystalline mixtures comprising Compound I as well as their use in electro-optical devices also are disclosed.

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