Derivatives of 4-cyano-2,3-difluorophenol

Compositions – Liquid crystal compositions – Containing nonsteryl liquid crystalline compound of...

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2522995, 2522996, 25229963, 25229964, 25229965, 25229966, 350350R, 350350S, 558414, 558416, 558423, 558425, 544224, 544238, 544295, 544296, 544298, 544316, 544333, 544335, 544336, 544406, 544408, 544410, 546256, 546261, 546263, 546264, 546268, 546278, 546280, 546298, 546300, 546326, 546330, 549 21, 549 22, 549 28, 549 13, 549 14, 549357, 549370, 549372, 549373, 549378, 549415, 549419, 549425, 549426, 549427, G02F 113, C09K 1930, C09K 1934, C09K 1920, C07C12175, C07D31900, C07D23934

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049255908

ABSTRACT:
Derivatives of 4-cyano-2,3-difluorophenol of the formula I ##STR1## wherein R.sup.1 is an alkyl group which has 1-12 C atoms and in which one or two CH.sub.2 groups can also be replaced by --O--, --CO--, --CO--O-- and/or --CH.dbd.CH--, no two 0 atoms being directly attached to one another,

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patent: 4776973 (1988-10-01), Bofinger et al.
patent: 4820839 (1989-04-01), Krause et al.
patent: 4834904 (1989-05-01), Krause et al.

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