Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
  • C07D401/14—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing three or more hetero rings
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P25/00—Drugs for disorders of the nervous system
  • A61P25/04—Centrally acting analgesics, e.g. opioids
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D403/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00
  • C07D403/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing two hetero rings
  • C07D403/04—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing two hetero rings directly linked by a ring-member-to-ring-member bond

Definitions

• the present invention relates to new pyrrolyl tetrahydroquinoxalinediones, processes for their preparation and their use for combating diseases.
• excitatory amino acids especially glutamic acid
• the excitatory amino acid glutamate acts as a transmitter substance for receptors, of which various subtypes are known.
• a subtype is e.g. B. named after the specific agonist N-methyl-D-aspartate NMDA receptor.
• This NMDA receptor has different binding sites for agonists or antagonists.
• the amino acid glycine also binds to the NMDA receptor and modulates the action of the natural agonist glutamic acid. Antagonists at this glycine binding site can then show antagonistic effects on the NMDA receptor and inhibit "overexcitation" of this receptor.
• AMPA 2-amino-3-hydroxy-5-methyl-4-isoxazole pyropionic acid
• kainic acid Two other subtypes of the glutamate receptors are the AMPA and the kainate receptor, which are each named after the specific agonists 2-amino-3-hydroxy-5-methyl-4-isoxazole pyropionic acid (AMPA) and kainic acid. Analogous to the NMDA receptor already mentioned, antagonists of these receptors can also inhibit "overexcitation”.
• a number of neurological diseases or mental disorders result in increased glutamate activity, which leads to conditions of overexcitation or toxic effects in the CNS.
• EP-A 315 959, DE-A 4 135 871, WO 91/13 878 and WO 92/07 847 describe alkyl radicals as R 1 in II, it being possible for the alkyl chain to be substituted with acids, esters or amides. Also are alkyl acids
• EP-A 556 393 imidazoles, triazoles, pyrazoles.
• the substances according to the invention are suitable for the treatment of all diseases in which a positive influence by glutamate antagonists can be expected.
• Indications are neurotoxic disorders, especially acute and chronic oxygen / (nutrient) deficiency / conditions of the central nervous system. These are to be understood as acute hypoxic or ischemic conditions, which e.g. as a result of cerebral infarction, subarachnoid hemorrhage or vascular spasms of another origin, even after cardiovascular failure - e.g. cardiac arrest, cardiac arrhythmias or circulatory shock - occur; CNS damage after hypoglycemia, as a result of perinatal asphyxia or after traumatic brain injury, spinal cord trauma, transient ischemic attacks (TIAs), prolonged reversible ischemic neurological deficits (PRINDs) and multi-infarct dementia and atherosclerotic dementia and migraines.
• TIAs transient ischemic attacks
• PRINDs prolonged reversible ischemic neurological deficits
• neurodegenerative diseases e.g. Parkinson's disease, Huntington's chorea, Alzheimer's disease, amyotropic lateral sclerosis (ALS).
• Parkinson's disease Huntington's chorea
• Alzheimer's disease amyotropic lateral sclerosis (ALS).
• ALS amyotropic lateral sclerosis
• glutamate antagonists can be used as antlepileptics, anxiolytics and antidepressants as well as for pain therapy, as well as for treating schizophrenia, withdrawal symptoms in addicts and as muscle relaxants for spasticity of the skeletal muscles, e.g. in multiple sclerosis (MS).
• MS multiple sclerosis
• the invention relates to new pyrrolyl-quinoxalinediones of the formula I.
• R 6 is hydrogen, C 1 -C 4 alkyl or OH and R 7 is hydrogen, C 1 -C 4 alkyl,
• phenyl or pyridyl rings contained can be substituted with up to 3 of the following radicals:
• Preferred compounds according to the invention are quinoxalinedione derivatives of the formula
• R 7 is hydrogen, -CH 2 -C 6 H 5 ,
• R 3 and R 4 represent a fused benzene ring.
• the compounds I according to the invention can be prepared in the following way, which are outlined in reaction scheme 1.
• aldehydes III The synthesis of aldehydes III has been described in EP-A 572 852. These aldehydes can be oxidized to the carboxylic acids I a according to the invention by methods customary in the literature, which are listed, for example, in RC Larock, "Comprehensive Organic Transformations", 1989, VCH Publisher, p. 838 f. In particular one uses for example
• radical R 1 carries an ester group, it can be hydrolyzed with acids and bases to give the carboxylic acid, analogously to the above, the derivatives I c according to the invention being obtained.
• the compounds according to the invention are antagonists of the excitatory amino acid glutamate, in particular antagonists of the glycine binding site of the NMDA receptor, the AMPA receptor and the kainate receptor.
• the pharmacological activity of the compounds I was investigated on isolated membrane material from rat cerebrum.
• the membrane material in the presence of the compounds according to the invention with the radioactively labeled substances
• 3H-2-Amino-3-hydroxy-5-methyl-4-isoxazolopropionic acid 3 H-AMPA
• [ 3 H] -glycine or [ 3 H] -cainate which are directed at specific receptors (AMPA, NMDA or Bind kainate receptors).
• the radioactivity of the treated membrane was then measured by scintillation counting.
• the amounts of bound 3 H-AMPA, [ 3 H] -glycine or [ 3 H] -cainate or the respectively displaced amounts of these radioactively labeled substances could be determined via the bound radioactivity.
• Inhibitor which is a measure of the displacement effect of the active substance according to the invention, was determined by iterative nonlinear regression analysis with the Statstical Analysis System (SAS) on an IBM computer, similar to the program "Ligand” by PJ Munson and D. Rodbard (Analytical Biochem. 107, 220 (1980), Ligand: Versatile Computerized Approach for Characterization of Ligand Binding Systems).
• SAS Statstical Analysis System
• a buffer solution A consisting of 30 mM a, a, a-tris (hydroxymethyl) methylamine-Hy- Homochloride (TRIS-HCl) and 0.5 mM ethylenediaminetetraacetic acid (EDTA) - pH 7.4 - homogenized using an Ultra-Turrax R stirrer.
• the suspension was 20 min. centrifuged at 48000g. After the supernatant had been separated off, the proteinaceous membrane material contained in the sediment was washed three times by suspending it in buffer solution A and then centrifuging at 48,000 g for 20 minutes each. The membrane material was then suspended in a 15-fold volume of buffer solution A and 30 min. incubated at 37 ° C. The protein material was then washed twice by centrifugation and suspension and frozen at -70 ° C. until used.
• the protein material thawed at 37 ° C was centrifuged twice at 48,000 g (20 min.) And then suspended in a buffer solution B of 50 mM TRIS-HCl, 0.1 M potassium thiocyanate and 2.5 mM calcium chloride - pH 7 , 1 - washed. Then 0.25 mg of membrane material, 0.1 ⁇ Ci 3 H-AMPA (60 Ci / mmol) and compound I were dissolved in 1 ml of buffer solution B and 60 min. incubated on ice. The incubated solution was filtered through a CF / B filter (Whatman), which had previously been treated with a 0.5% aqueous solution of polyethyleneimine for at least 2 hours.
• CF / B filter Whatman
• the membrane residue was then washed with 5 ml of cold buffer solution B in order to separate bound and free 3 H-AMPA from one another. After measuring the radioactivity of the bound 3 H-AMPA in the membrane material by scintillation counting, the Ki value was determined by evaluating the displacement curves by means of regression analysis.
• rat hippocampi were homogenized in a 10-fold volume of preparation buffer (50 mM Tris-HCl, 10 mM EDTA) using a Potter homogenizer. The homogenate was 20 min. Centrifuged at 48000 xg. The supernatant was discarded and the membranes obtained in the pellet were washed twice by resuspending and centrifuging at 48,000 ⁇ g (20 min in each case). The resuspended membranes were frozen in liquid nitrogen and thawed again at 37 ° C. After a further washing step, the membrane suspension was 15 min. at 37 ° C in a shaking water bath incubated. After 4 further washing steps (centrifugation at 48000 xg for 20 minutes and resuspending in preparation buffer), the membranes were frozen at -70 ° C. until further use.
• preparation buffer 50 mM Tris-HCl, 10 mM EDTA
• the frozen membranes were thawed at 37 ° C. and washed twice by centrifugation at 48,000 ⁇ g (20 min.) And then resuspending in binding buffer (50 mM Tris-HCl pH 7.4, 10 mM MgCl 2 ).
• binding buffer 50 mM Tris-HCl pH 7.4, 10 mM MgCl 2 .
• An incubation mixture contained 0.25 mg protein (membranes), 25 nM 3 H-glycine (16 Ci / mmol) and the substances to be tested in a total of 0.5 ml binding buffer. Non-specific binding was determined by adding 1 mM glycine.
• Liquid scintillation counting determined.
• the dissociation constants were calculated from the displacement curves using an iterative nonlinear fitting program or according to the equation by Cheng and Prusoff.
• the membranes were washed twice by centrifugation and resuspension and frozen at -70 ° C. until further use.
• the frozen membranes were thawed at 37 ° C, suspended in binding buffer (50 mM Tris-HCl pH 7.4) and 20 min. Centrifuged at 48000 xg. The membranes in the pellet were resuspended in binding buffer. An incubation mixture contained 0.25 mg protein (membranes), 0.058 ⁇ Ci 3 H-kainate (58 Ci / mmol) as well as the substances to be tested in a total of 1 ml binding buffer. Non-specific binding was determined in the presence of 0.1 mM glutamate. After incubation on ice for 60 minutes, bound and free ligand were separated from one another by filtration through CF / B filters and subsequent washing with 5 ml of ice-cold binding buffer. The CF / B filters were previously for treated with 0.5% polyethyleneimine for at least 2 hours. The displacement curves were evaluated and the dissociation constants calculated using a non-linear adaptation program or according to the equation by Cheng and Prusoff.
• EAA Excitatory Amino Acids
• the compounds I according to the invention are suitable as medicaments for human and veterinary medicine and can be used for the production of medicaments for the treatment of neurodegenerative diseases and neurotoxic disorders of the central nervous system and for the preparation of antiepileptics, anxiolytics, antidepressants and antinociceptives.
• the pharmaceutical preparations according to the invention contain a therapeutically effective amount of the compounds I.
• the active ingredients can be contained in the usual concentrations.
• the active ingredients are present in an amount of 0.0001 to 1% by weight, preferably 0.001 to 0.1% by weight.
• the preparations are administered in single doses. 0.1 to 100 mg per kg body weight are given in a single dose.
• the preparations can be administered daily in one or more doses depending on the type and severity of the diseases.
• the pharmaceutical preparations according to the invention contain, in addition to the active ingredient, the customary carriers and diluents.
• pharmaceutical technical auxiliaries such as ethanol, isopropanol, ethoxylated castor oil, ethoxylated hydrogenated castor oil, polyacrylic acid, polyethylene glycol, polyethylene glycol stearate, ethoxylated fatty alcohols, paraffin oil, petroleum jelly and wool fat can be used.
• z As milk sugar, propylene glycol, ethanol, starch, talc and polyvinyl pyrrolidone.
• Antioxidants such as tocopherol and butylated hydroxyanisole and butylated hydroxytoluene, taste-improving additives, stabilizers, emulsifiers and lubricants can also be present.
• the substances contained in the preparation in addition to the active substance and the substances used in the manufacture of the pharmaceutical preparation are toxicologically safe and compatible with the respective active substance.
• the preparation of the pharmaceutical preparations is carried out in the usual way, for. B. by mixing the active ingredient with the usual carriers and diluents.
• the pharmaceutical preparations can be administered in various modes of administration, such as orally, parenterally, subcutaneously, intraperitoneally and topically.
• forms of preparation such as tablets, emulsions, infusion and injection solutions, pastes, ointments, gels, creams, lotions, powders and sprays are possible.
• Example 5 Analogously to Example 5, the following compounds according to the invention were prepared from the corresponding carboxylic acids (Examples 1-4):
• Example 2 1.5 g (3.8 mmol) of Example 2 were dissolved in 50 ml of tetrahydrofuran and a solution of 0.27 g (11.3 mmol) of lithium hydroxide in 25 ml of water was added. Everything was stirred for 1 h at room temperature. The organic solvent was then removed in vacuo and the resulting aqueous phase was weakly acidified with hydrochloric acid. The precipitate was filtered off and recrystallized from a little isopropanol.
• Example 14 Analogously to Example 14, the following compounds according to the invention were prepared from the corresponding carboxylic acid esters.

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• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Health & Medical Sciences (AREA)
• Medicinal Chemistry (AREA)
• Pain & Pain Management (AREA)
• Neurology (AREA)
• Neurosurgery (AREA)
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• 1995
  • 1995-08-31 DE DE19532050A patent/DE19532050A1/de not_active Withdrawn
• 1996
  • 1996-08-26 CN CN96196618A patent/CN1092192C/zh not_active Expired - Fee Related
  • 1996-08-26 WO PCT/EP1996/003759 patent/WO1997008168A1/de not_active Application Discontinuation
  • 1996-08-26 AU AU69846/96A patent/AU6984696A/en not_active Abandoned
  • 1996-08-26 EP EP96930966A patent/EP0847395A1/de not_active Withdrawn
  • 1996-08-26 JP JP9509847A patent/JPH11511451A/ja active Pending
  • 1996-08-26 US US09/000,277 patent/US6407109B1/en not_active Expired - Fee Related

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