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US3975388A Expired / Lapsed US ⏱️ 0.0 years remaining

Pyridazinones

Assignee: BDH Pharmaceuticals Ltd
•
Filing: 1974-11-11
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Granted: 1976-08-17
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Expires: 1994-11-11
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Abstract

Abstract Compounds of the general formula: ##SPC1## In which X represents a straight or branched chain alkyl or alkoxy group, a hydroxymethyl group, a cycloalkyl group, a cycloalkoxy group, an aryloxy group, a hydroxyl group, a fluorine atom, a chlorine atom, an amino or substituted amino group, a piperidino group, a morpholino group, a pyrrolidino group, a 1,2,3,6-tetrahydropyridino group, a 4-[3-azabicyclo(3,2,2)-nonyl] group, or a 4-(piperazin-1-yl) or 4-(4-substituted-piperazin-1-yl) group of the formula ##SPC2## In which R=H, lower alkyl or 1-5 carbon atoms, aryl, substituted aryl, aralkyl, cinnamyl, acyl, ethoxy-carbonyl, aroyl or substituted aroyl and n is an integer from 1 to 5 except that when n is 1 X is not an alkyl group of 1 to 3 carbon atoms or an alkoxy group of 1 or 2 carbon atoms or a chlorine atom in the 4'-position, or an amino or acylated amino group in positions 2', 3' or 4'; and when n = 2 the groups X cannot both be methyl or both be methoxy in the 2' and 5' positions, nor can X be a chlorine atom in both the 2' and 4' positions or the 3' and 4' positions, and when n = 3, X cannot all three be methoxy. These compounds have anti-hypertensive activity.

Inventors

  • 👤 Mehmood Abdulhameed Hakim
  • 👤 Peter Thomas Bysouth

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 03:24
CPC Classifications
C; C07; C07C; C07C59/00; C07C59/40; C07C59/76; C07C59/90

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 20 words
A compound of the formula: ##SPC7## wherein X is: a straight or branched chain alkoxy group having 3-12 carbon atoms.
Claim 2
Dependent Claim 20 words
A compound of the formula: ##SPC7## wherein X is: a straight or branched chain alkoxy group having 3-12 carbon atoms.
Claim 3
Dependent Claim 30 words
The compound of claim 1 wherein the alkoxy group is selected from the group consisting of propoxy, isopropoxy, methylbutoxy, butoxy, ethylpropoxy, hexyloxy, octyloxy, nonyloxy, decyloxy, ethylbutoxy, dodecyloxy, heptyloxy and pentyloxy.
Claim 4
Dependent Claim 8 words
The compound of claim 1 which is 6(p-hexyloxyphenyl)-4,5-dihydro-3(2H)-pyridazinone.

References Cited (Backward Citations)

GB696254A Cited
DE2207517A1 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1979-08-17 1980-02-16 1980-08-17 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1983-08-17 1984-02-16 1984-08-17 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1987-08-17 1988-02-16 1988-08-17 $7700.00 Window Closed / Lapsed

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