Patent number: 6326066
Abstract: 1,4-disubstituted 2,6-difluorobenzene compound of formula I
wherein
R is an alkyl or alkenyl radical,
A1 and A2 are independently
(a) a trans-1,4-cyclohexylene radical in which a CH2 group may be replaced by -O- and/or -S,
(b) a 1,4-phenylene radical in which a CH group may be replaced by N,
(c) 1,4-cyclohexenylene, 1,4-bicyclo(2,2,2)octylene, piperidine-1,4-diyl, naphthalene-2,6-diyl, decahydronaphthalene-2,6-diyl or 1,2,3,4-tetrahydronaphthalene-2,6-diyl,
Z1 and Z2 are —CO—O—, —O—CO—, —CH2O—,—OCH2—, —CH2CH2—, —CH═CH—,—C≡C—or a single bond
m and n are 0, 1, 2 or 3,
(m+n) is 1, 2 or 3,
X is R or F, Cl, CF3, —OCF3, or —OCHF2, —OCF5, —CN or —NCS
with the provisos that at least one of the radicals A1 and A2 present in the molecule is
and at least one of Z1 or Z2 is —COO—,
are suitable as components of liquid-
Type:
Grant
Filed:
February 28, 2000
Date of Patent:
December 4, 2001
Assignee:
Merck Patent Gesellschaft mit Reschankter Haftung
Inventors:
Eike Poetsch, Volker Meyer, Volker Reiffenrath, Andreas Wachtler, Ulrich Finkenzeller, Hans Adolf Kurmeier, Reinhard Hittich, Bernhard Rieger, David Coates, Simon Greenfield, Robert William Clemitson
Patent number: 6284154
Abstract: Novel phenylcyclohexanes of the formula I
in which n is 0 to 7, Q1 and Q2 are H, or one of these radicals is alternatively CH3, r is 0, 1, 2, 3, 4 or 5, A is trans-1,4-cyclohexylene, 1,4-phenylene, 3-fluoro-1,4-phenylene or a single bond, X is F, Cl, —CF3, —CN, —OCF3 or —OCHF2, and Y and Z are each, independently of one another, H or F, with the proviso that, in the case where A is a single bond, Q1═Q2═H and simultaneously X═CN, Y and/or Z are F.
Type:
Grant
Filed:
June 7, 1995
Date of Patent:
September 4, 2001
Assignee:
Merck Patent Gesellschaft mit Beschrankter Haftung
Inventors:
Andreas Wächtler, Reinhard Hittich, Eike Poetsch, Herbert Plach, David Coates, Bernhard Rieger, Joachim Krause
