Liquid crystalline compounds and mixtures

Details Liquid crystalline compounds and mixtures Liquid crystalline compounds and mixtures

1987-04-03

1990-12-25

Maples, John S.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

25229901, 25229961, 558 17, C07D31906, C09K 1934

Patent

active

049804863

ABSTRACT:
This invention concerns compounds of the formula: ##STR1## wherein X is a single covalent bond, --CH.sub.2 CH.sub.2 --, 1,4-phenylene, a 2,5-disubstituted pyrimidine ring or a group of the formula: ##STR2## ring A is trans-1,4-cyclohexylene or, when X is a single covalent bond, ring A may also be 1,4-phenylene, a 2,5-disubstituted pyrimidine ring or a trans-2,5-disubstituted m-dioxane ring; and

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