Liquid crystalline compound having dienyl moiety and liquid crys

Details Liquid crystalline compound having dienyl moiety and liquid crys Liquid crystalline compound having dienyl moiety and liquid crys

1999-02-02

2000-07-11

Wu, Shean C.

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

25229961, 25229962, 25229963, 25229966, 25229967, 25229901, 544180, 544238, 544242, 544336, 546350, 549369, C09K 1934, C09K 1952, C07D23902, C07D21182, C07D31906

Patent

active

06086964&

ABSTRACT:
The present invention is to provide a liquid crystalline
The present invention is concerned with a liquid crystalline compound expressed by general formula (1) ##STR1## wherein R.sub.1 represents cyano group, halogen atom, or a straight or branched alkyl group or halogenated alkyl group having 1 to 20 carbon atoms, one or not-adjacent two CH.sub.2 groups in the alkyl group or halogenated alkyl group may be replaced by oxygen atom or --CH.dbd.CH-- group; R.sub.2 and R.sub.2 ' represent hydrogen atom, halogen atom, or an alkyl group having 1 to 9 carbon atoms; X.sub.1, X.sub.2, and X.sub.3 independently represent --CH.sub.2 CH.sub.2 --, --CO--O--, --O--CO--, --CH.dbd.CH--, --C.tbd.C--, --(CH.sub.2).sub.4 --, --CF.sub.2 O--, --OCF.sub.2 --, --CH.sub.2 O--, --OCH.sub.2 --, or a covalent bond; rings A, B, C, and D independently represent 1,4-phenylene ring, trans-1,4-cyclohexylene ring, bicyclo[1,1,0]butane ring, bicyclo[1,1,1]pentane ring, bicyclo[3,2,2]octane ring, cyclobutane ring, or spiro[3,3]heptane ring, respectively, hydrogen atom in these rings may be replaced by halogen atom and carbon atom in these rings may be replaced by nitrogen atom or oxygen atom; l, m, and o are independently 0 or 1, n is an integer of 0 to 3, and p is an integer of 1 to 5.

REFERENCES:
patent: 5328637 (1994-07-01), Buchecker et al.
patent: 5609791 (1997-03-01), Fujita et al.
patent: 5744058 (1998-04-01), Reiffenrath et al.

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