§
Luxuse
Patent Intelligence
Sign In
← Back to Patent Explorer
US4776973A Expired / Lapsed US ⏱️ 0.0 years remaining

Pyrimidine derivatives

Assignee: Merck Patent GmbH
•
Filing: 1986-02-24
•
Granted: 1988-10-11
•
Expires: 2006-02-24
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract Pyrimidine derivatives of the formula I R.sup.1 --Pry--A.sup.1 --Z.sup.1 --A.sup.2 -[Z.sup.2 --A.sup.3 ].sub.m --R 2 I in which R 1 and R 2 each are an alkyl group having 1 to 12 C atoms, in which one or two non-adjacent CH 2 groups can also be replaced by --O--, --CO--, --O--CO--, --CO--O-- or --CH═CH--, and one of the radicals R 1 and R 2 are H, F, Cl, Br or CN, Pyr is pyrimidine-2,5-diyl, A 1 and A 3 each are 1,4-cyclohexylene, unsubstituted 1,4-phenylene or 1,4-phenylene which is substituted by one or two F and/or Cl atoms and/or CH 3 and /or CN groups, A 2 is 1,4-phenylene which is unsubstituted or substituted by one or two F and/or Cl atoms and/or CH 3 and/or CN groups, Z 1 is --CH 2 CH 2 --, --CH 2 O--, or --OCH 2 -- Z 2 is --CO--O--, --O--CO--, --CH 2 CH 2 --, --CH 2 O--, --O--CH 2 -- or a single bond, and m is 0 or 1, are suitable for preparing liquid crystal phases having steep electro-optical characteristic curves.

Inventors

  • 👤 Klaus Bofinger
  • 👤 Michael Romer
  • 👤 Bernhard Scheuble
  • 👤 Georg Weber

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 02:53
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/26; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/34; C09K19/3441; C09K19/345; C09K19/3458

Claims Analysis

Total Claims: 13
Claim 1
Independent Claim 96 words
A pyrimidine compound of the formula R.sup.1 --Pyr--A.sup.1 --Z.sup.1 --A.sup.2 --R.sup.2 wherein each of R 1 and R 2 independently is alkyl of 1 to 12C atoms, or alkyl of 1-12C atoms in which one or two non-adjacent CH 2 groups are replaced by --O--, --CO--, --O--CO-- or --CO--O-- and one of R 1 and R 2 can also be H, F, Cl or Br, Pyr is pyrimidine-2,5-diyl, A 1 is 1,4-cyclohexylene (Cy) or 1,4-phenylene (Phe), A 2 is 1,4-phenylene, and Z 1 is --CH 2 CH 2 --, --CH 2 O-- or --OCH 2 --.
Claim 2
Dependent Claim 96 words
A pyrimidine compound of the formula R.sup.1 --Pyr--A.sup.1 --Z.sup.1 --A.sup.2 --R.sup.2 wherein each of R 1 and R 2 independently is alkyl of 1 to 12C atoms, or alkyl of 1-12C atoms in which one or two non-adjacent CH 2 groups are replaced by --O--, --CO--, --O--CO-- or --CO--O-- and one of R 1 and R 2 can also be H, F, Cl or Br, Pyr is pyrimidine-2,5-diyl, A 1 is 1,4-cyclohexylene (Cy) or 1,4-phenylene (Phe), A 2 is 1,4-phenylene, and Z 1 is --CH 2 CH 2 --, --CH 2 O-- or --OCH 2 --.
Claim 3
Dependent Claim 32 words
A compound of claim 1 of the formula R 1 --Pyr--Phe--OCH 2 --Phe--R 2 , R 1 --Pyr--Phe--CH 2 CH 2 --Phe--R 2 , or R 1 --Pyr--Phe--CH 2 O--Phe--R 2 .
Claim 4
Dependent Claim 32 words
A compound of claim 1 of the formula R 1 --Pyr--Cy--OCH 2 --Phe--R 2 , R 1 --Pyr--Cy--CH 2 CH 2 --Phe--R 2 , or R 1 --Pyr--Cy--CH 2 O--Phe--R 2 .
Claim 5
Dependent Claim 16 words
A compound of claim 1 wherein R 1 and R 2 are alkyl, alkoxy or oxaalkyl.
Claim 6
Dependent Claim 14 words
A compound of claim 1 wherein Z 1 is --CH 2 --CH 2 --.
Claim 7
Dependent Claim 16 words
A compound of claim 4 wherein Z 1 is --CH 2 --O-- or --O--CH 2 --.
Claim 8
Dependent Claim 12 words
A compound of claim 1 wherein Z 1 is --OCH 2 --.
Claim 9
Dependent Claim 15 words
A compound of claim 1 of the formula Alkyl--Pyr--Phe--OCH 2 --Phe--alkyl or Alkyl--Pyr--Phe--OCH 2 --Phe--alkoxy.
Claim 10
Dependent Claim 16 words
A compound of claim 4 wherein R 1 or R 2 has an optically active C-atom.
Claim 11
Dependent Claim 25 words
In a liquid crystal phase comprising at least two liquid crystal components, the improvement wherein at least one component is a compound of claim 1.
Claim 12
Dependent Claim 20 words
In a liquid crystal display element, comprising a liquid crystal phase, the improvement wherein the phase is of claim 10.
Claim 13
Dependent Claim 21 words
In an electro-optical display element comprising a liquid crystalline dielectric, the improvement wherein the dielectric is a phase of claim 10.

References Cited (Backward Citations)

US4311610A Cited
GB2092169A Cited
EP0056501A2 Cited
US4564694A Cited
US4528114A Cited
EP0084194A1 Cited
US4512636A Cited
US4630897A Cited
US4676604A Cited
US4723005A Cited
US4623477A Cited
US4632515A Cited
US4659502A Cited
EP0149238A2 Cited
US4713197A Cited
DE3404116A1 Cited
DE3411571A1 Cited
WO1986000067A1 Cited
US4621901A Cited
DE3500909A1 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1991-10-11 1992-04-11 1992-10-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-10-11 1996-04-11 1996-10-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-10-11 2000-04-11 2000-10-11 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag