Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Patent
1990-01-16
1991-12-10
Maples, John S.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
25229901, 25229962, C07C 6976, C09K 1932
Patent
active
050720210
ABSTRACT:
The present invention is directed to optically active compounds each containing a naphthalene skeleton, and to liquid crystal compositions which contain the aforesaid optical active compounds, these compositions being suitable for ferroelectric liquid crystal devices having excellent photostability and chemical stability and having a rapid responsivity. The compounds of the present invention are represented by the general formula ##STR1## wherein X is a hydrogen atom, a halogen atom, a cyano group, an alkyl group or a methoxy group, the latter two groups each having 1 or 2 carbon atoms; and A and B are independently represented by following formula and at least one of them contains an asymmetric carbon atom ##STR2## wherein C and D rings are independent and each of them is a 1,4-phenylene, 2,6-naphthylene, pyrimidine-2,5-diyl, trans-1,4-cyclohexylene, trans-1,3-dioxane-2,5-diyl, trans-1,3-oxathian-2,5-diyl, trans-1,3-dithian-2, 5-diyl or 1,3,2-dioxaborinane-2,5-diyl group; each of m and n is an integer of 0, 1 or 2; each of Z.sub.1, Z.sub.2, Z.sub.3 and Z.sub.4 is a bonding group of one or more selected from the group consisting of a single bond, --C(O)--, --O--, --CH.sub.2 --, --CH.dbd.N--, --N.dbd.CH--, --CH.dbd.CH--, --C.tbd.C--, --N.dbd.N-- and --N(O).dbd.N--; and Y is a hydrogen atom, a halogen atom, a cyano group, a straight-chain or branched alkyl group or an alkenylalkyl group, the latter two groups each having 1 to 20 carbon atoms.
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Nakatsuka Masakatsu
Nishizawa Tsutomu
Maples John S.
Mitsui Toatsu Chemicals Inc.
Treanor Richard
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