3-Chloropyridines, and their use in liquid-crystal mixtures

Details 3-Chloropyridines, and their use in liquid-crystal mixtures 3-Chloropyridines, and their use in liquid-crystal mixtures

1994-05-10

1997-05-13

Rotman, Alan L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546 13, 546 14, 5462817, 5462834, 5462837, 546345, 544333, 544360, 349182, C07F 502, C07F 704, C07D40512, C07D40310

Patent

active

056294280

ABSTRACT:
3-Chloropyridines, process for their preparation, and their use in liquid-crystal mixtures
A 3-chloropyridine of the formula (I) ##STR1## in which the symbols have the following meaning: R.sup.1 and R.sup.2, independently of one another, are, for example, H or straight-chain or branched alkyl, A.sup.1, A.sup.2, A.sup.3 and A.sup.4 are identical or different and are, for example, 1,4-phenylene, pyrazine-2,5-diyl or trans-1,4-cyclohexylene, M.sup.1, M.sup.2, M.sup.3 and M.sup.4 are identical or different and are, for example, --O-- or --CO--O--, R.sup.3, R.sup.4, R.sup.6 and R.sup.7, independently of one another are, for example, H or straight-chain or branched alkyl, M.sup.5 is, for example, --O--CO-- or a single bond, k, l, m, n, o, p, q and r are zero or one, with the proviso that the sum k+m+p+r is less than 4 and greater than zero, can advantageously be employed as a component in ferroelectric liquid-crystal mixtures.

REFERENCES:
patent: 4765924 (1988-08-01), Inoue et al.
patent: 4898455 (1990-02-01), Buchecker et al.
patent: 5284956 (1994-02-01), Buchecker et al.
L. A. Karamysheva et al., 1981, pp. 241-251, "New Heterocyclic Liquid Crystalline Compounds".
Liquid Crystals by Burrow et al., 1988, vol. 3, No. 12, pp. 1663-1653, "The Synthessis and Liquid Crystal Properties of some 2,5-disubstituted pyridines".
T. Geelhaar, 1st International Symposium on Ferroelectric Liquid Crystals, Arcachon, 12--23 Sep. 1987.
A. I. Pavlyuchenko, et al., Scientific Research Institute of Organic Intermediates and Dyes, Moscow. Translated from Zhurnal Organicheskoi Khimii, vol. 22, No. 5, pp. 1061-1065, May, 1986. Original article submitted May 13, 1985.

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