Carboxylate compounds, liquid crystal compositions and liquid cr

Details Carboxylate compounds, liquid crystal compositions and liquid cr Carboxylate compounds, liquid crystal compositions and liquid cr

1991-12-24

1994-10-18

Wu, Shean

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229901, 560 56, 560 80, 560100, 560119, C09K 1932, C07C 6976

Patent

active

053565614

ABSTRACT:
In accordance with the present invention, there are provided carboxylate compounds represented by the following formula [A] and liquid crystal material comprising said compounds ##STR1## wherein R is a group selected from the group consisting of alkyl, alkoxy and halogenated alkyl group of 3-20 carbon atoms, X and Y represent each a group selected from the group consisting of --COO--, --OCO--, --CH.sub.2 CH.sub.2 --, --CH.sub.2 O--, --OCH.sub.2 --, --S--S--, ##STR2## or a single bond, A and B represent each a group selected from the group consisting of specific divalent aromatic and alicyclic group such as phenylene, cyclohexylene and tetrahydronaphthalene and R* is an optically active group of 4-20 carbon atoms containing at least one asymmetric carbon atom (hydrogen atoms attached to the carbon atoms of said optically active group may be substituted with halogen atoms), and m and n are each an integer of 0-2, with the proviso that both m and n do not become 0 at the same time.

REFERENCES:
patent: 4341652 (1982-07-01), Takei et al.
patent: 4386007 (1983-05-01), Krause et al.
patent: 4613209 (1986-09-01), Goodby et al.
patent: 4680137 (1987-07-01), Isoyama et al.
patent: 4759869 (1988-07-01), Ohno et al.
patent: 4886620 (1989-12-01), Hopf et al.
patent: 5246622 (1993-09-01), Shimizu et al.

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