EP1499369A1 - Stents enthaltend pyridin-substituierte pyrazolopyridinderivate - Google Patents
Stents enthaltend pyridin-substituierte pyrazolopyridinderivateInfo
- Publication number
- EP1499369A1 EP1499369A1 EP03746828A EP03746828A EP1499369A1 EP 1499369 A1 EP1499369 A1 EP 1499369A1 EP 03746828 A EP03746828 A EP 03746828A EP 03746828 A EP03746828 A EP 03746828A EP 1499369 A1 EP1499369 A1 EP 1499369A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- stents
- formula
- compounds
- treatment
- prophylaxis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
- A61K31/4353—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom ortho- or peri-condensed with heterocyclic ring systems
- A61K31/437—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom ortho- or peri-condensed with heterocyclic ring systems the heterocyclic ring system containing a five-membered ring having nitrogen as a ring hetero atom, e.g. indolizine, beta-carboline
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/495—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with two or more nitrogen atoms as the only ring heteroatoms, e.g. piperazine or tetrazines
- A61K31/505—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim
- A61K31/506—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim not condensed and containing further heterocyclic rings
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/14—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
- A61L31/16—Biologically active materials, e.g. therapeutic substances
Definitions
- the present invention relates to stimulators of soluble guanylate cyclase-containing stents, methods for producing these stents and their use, in particular for the treatment and / or prophylaxis of restenoses and / or thromboses.
- Atherosclerotic coronary diseases are treated, among other things, with the method of percutaneous transluminal coronary angioplasty that is common today
- PTCA PTCA treated.
- a balloon catheter is inserted into the narrowed or closed artery, which is then expanded by expanding the balloon and the blood flow is thus restored.
- the acute reoccurrence of the blood vessel that occurs immediately after the PTCA (acute restenosis) or the later subacute (restenosis) is a problem that occurs in approx. 30% of cases.
- the risk of acute restenosis can be reduced by adding platelet aggregation inhibitors.
- the coronary wall can be mechanically supported by a usually cylindrical and expandable braid (stent), which is inserted into the diseased vessel and unfolded at the site of the stenosis in order to open the narrowed area and to keep it open by supporting the blood vessel wall.
- stent usually cylindrical and expandable braid
- Anticoagulants such as heparin are currently used; Platelet aggregation inhibitors such as, for example, aspirin, clopidogrel (Plavix) or ticlopidine (ticlid); or glycoproteinlib / IIIa antagonists such as abciximab are used systemically in stent treatment.
- Platelet aggregation inhibitors such as, for example, aspirin, clopidogrel (Plavix) or ticlopidine (ticlid); or glycoproteinlib / IIIa antagonists such as abciximab are used systemically in stent treatment.
- a more recent way to treat restenosis is to administer it locally of the active ingredient by means of a stent which releases the active ingredient.
- the combination of active ingredient and stent enables drug treatment and mechanical stabilization in one application.
- Concentration of active ingredient without causing undesirable systemic side effects (e.g. bleeding or stroke).
- stents can be coated with coating materials containing active ingredients.
- the active ingredient is released by diffusion from the paint or by breaking down the
- drug-containing stents can be melt-embedded in a polymeric carrier, e.g. with the help of injection molding processes.
- the active ingredient is usually released by diffusion.
- stimulators of soluble guanylate cyclase are particularly suitable as active substances.
- cGMP forms the NO / cGMP system.
- the guanylate cyclases catalyze the biosynthesis of cGMP from guanosine tri- phosphate (GTP).
- GTP guanosine tri- phosphate
- the previously neglected freezers of this family can be divided into two groups according to structural features and the type of ligand: the particulate guanylate cyclases that can be stimulated by natriuretic peptides and the soluble guanylate cyclases that can be stimulated by NO.
- the soluble guanylate cyclases consist of two subunits and most likely contain one heme per heterodimer, which is part of the regulatory center. This is of central importance for the activation mechanism. NO can bind to the iron atom of the heme and thus significantly increase the activity of the enzyme. Hem-free preparations, on the other hand, cannot be stimulated by NO. CO is also able to attack the central iron atom of the heme, whereby the stimulation by CO is significantly less than that by NO.
- guanylate cyclase plays a decisive role in different physiological processes, in particular in the relaxation and antiproliferation of smooth muscle cells, platelet aggregation and adhesion and neuronal signal transmission as well as in diseases which are based on a disturbance of the above-mentioned processes.
- WO 00/06569 and WO 00/21954, etc. pyrazolopyridine derivatives described as stimulators of soluble guanylate cyclase.
- the present invention thus relates to stents containing one or more compounds of the formula (I)
- R 1 represents 4-pyridinyl or 3-pyridinyl
- R 2 represents H, NH 2 or halogen
- R 1 represents 4-pyridinyl or 3-pyridinyl
- R 2 represents H, NH 2 or CI
- R 1 represents 4-pyridinyl or 3-pyridinyl
- R 2 represents H
- a stent containing the compound from Example 1 with the following formula is very particularly preferred
- the compounds of formula (I) according to the invention can also be present in the form of their salts.
- salts with organic or inorganic bases or acids may be mentioned here.
- Physiologically acceptable salts are preferred in the context of the present invention.
- Physiologically acceptable salts of the compound according to the invention can be salts of the substances according to the invention with mineral acids, carboxylic acids or sulfonic acids.
- Physiologically acceptable salts of the compound according to the invention can be salts of the substances according to the invention with mineral acids, carboxylic acids or sulfonic acids.
- particular preference is given to Salts with hydrochloric acid, hydrobromic acid, sulfuric acid, phosphoric acid, methanesulfonic acid, ethanesulfonic acid, p-toluenesulfonic acid, benzenesulfonic acid, naphthalenedisulfonic acid, acetic acid, propionic acid, lactic acid, tartaric acid, citric acid, fumaric acid, maleic acid or benzoic acid.
- Physiologically acceptable salts can also be metal or ammonium salts of the compound according to the invention which have a free carboxyl group.
- Sodium, potassium, magnesium or calcium salts, as well as ammonium salts derived from ammonia, or organic amines such as, for example, are particularly preferred for example ethylamine, di- or triethylamine, di- or triethanolamine, dicyclohexylamine, dimethylaminoethanol, arginine, lysine or ethylenediamine.
- the compounds of the invention can exist in tautomeric forms. This is known to those skilled in the art, and such forms are also within the scope of the invention.
- the compounds according to the invention can occur in the form of their possible hydrates.
- Halogen in the context of the invention represents fluorine, chlorine, bromine and iodine.
- the compounds of formula (I) can be prepared by reacting the compound of formula (II)
- R 1 is as defined above, optionally in an organic solvent with heating;
- R 1 is as defined above;
- R is as defined above; then with a halogenating agent to give compounds of the formula (VI)
- R is as defined above;
- R 2 represents halogen
- the compound of formula (II) can be prepared according to the following reaction scheme:
- the compound of the formula (II) is obtainable in a multistage synthesis from the sodium salt of the cyanobenzofrene acid ethyl ester (Borsche and Manteuffel, Liebigs. Ann. Chem. 1934, 512, 97) cited in the literature.
- 2-fluorobenzylhydrazine under heating and in a protective gas atmosphere in an inert solvent such as dioxane
- the 5-amino-l- (2-fluorobenzyl) -pyrazole-3-carboxylic acid ethyl ester is obtained, which is obtained by reaction with dimethylaminoacrolein in an acidic medium under a protective gas atmosphere and heating cyclized to the corresponding pyridine derivative.
- This pyridine derivative l- (2-fluorobenzyl) -IH-pyrazolo [3,4-b] pyridine-3-carboxylic acid ethyl ester is subjected to a multistage sequence consisting of converting the ester with ammonia into the corresponding amide, dehydration with a dehydrating agent such as trifluoroacetic anhydride to the corresponding nitrile derivative, reaction of the nitrile derivative with sodium ethylate and final reaction with ammonium chloride in the compound of formula (II).
- the compounds of the formula (III) can be prepared from the compounds t-butoxybis (dimethylamino) methane and 4-pyridylacetonitrile or 3-pyridylacetonitrile (commercially available from Aldrich, for example) by reacting these reactants. preferably in equimolar amounts, preferably at normal pressure and stirring the reaction solution for several hours, for example 2 hours, at elevated temperature, for example 60 to 130 ° C., preferably 80 to 120 ° C., in particular 100 ° C.
- reaction of the compounds of the formulas (II) and (III) to the compounds of the formula (I) can be carried out in an organic solvent, for example by using the reactants in equimolar amounts or using the compound of the formula (III) in a slight excess a hydrocarbon, preferably an aromatic hydrocarbon and especially xylene, preferably in the presence of 0.1-1 equivalents, preferably 0.3 equivalents of a Lewis acid such as, for example, BF 3 Et O or trimethylsilyl trifluorosulfonate (TMSOTf), preferably at normal pressure and with stirring of the reaction solution for several hours, for example 12 hours, at elevated temperature, for example 80 to 160 ° C., preferably 100 to 150 ° C., in particular 140 ° C.
- a hydrocarbon preferably an aromatic hydrocarbon and especially xylene
- a Lewis acid such as, for example, BF 3 Et O or trimethylsilyl trifluorosulfonate (TMSOTf)
- TMSOTf trimethylsilyl tri
- the compounds of formula (TV) are commercially available (e.g. from Mercachem) or can be prepared in a manner known to those skilled in the art.
- reaction of the compounds of the formulas (II) and (IV) to the compounds of the formula (V) can be carried out in an organic solvent, for example by using the reactants in equimolar amounts or using the compound of the formula (IN) in a slight excess a hydrocarbon, preferably an aromatic hydrocarbon and in particular toluene, preferably at normal pressure and stirring the reaction solution for several hours, for example 12 hours, at elevated temperature, for example 80 to 160 ° C., preferably 100 to 150 ° C., in particular 140 ° C. , be performed.
- a hydrocarbon preferably an aromatic hydrocarbon and in particular toluene
- the reaction of the compounds of formula (V) to compounds of formula (VI) can be carried out by reacting the compounds of formula (V) with a halogenating medium, optionally in an organic solvent conventionally used for such reactions, such as dimethylformamide (DMF), preferably at normal pressure and stirring the reaction solution for several hours, for example 3 hours, at elevated temperature, for example 80 to 160 ° C., preferably 100 to 120 ° C, are carried out.
- a halogenating medium optionally in an organic solvent conventionally used for such reactions, such as dimethylformamide (DMF)
- DMF dimethylformamide
- POCl 3 can preferably be used as the halogenating agent.
- the reaction of the compounds of the formula (VI) to the compounds of the formula (I) can be carried out by reacting the compounds of the formula (VI) with aqueous ammonia solution, preferably at elevated pressure, for example by running the reaction in an autoclave, so that the reaction takes place under the intrinsic pressure of the reaction mixture, and stirring the reaction solution for several hours, for example 12 hours, at elevated temperature, for example 80 to 160 ° C, preferably 100 to 150 ° C, in particular 140 ° C, are carried out.
- the present invention describes the use of one or more compounds of the formula (I), optionally in combination with one or more other active compounds, for the production of a drug-containing release system, in particular a drug-containing stent.
- the present invention describes a release system, in particular a stent, which contains one or more compounds of the formula (I), optionally in combination with one or more other active compounds, and the targeted release of one or more compounds of the formula (I) and of other active substances that may be present at the site of action (drug targeting) and are therefore suitable for the prophylaxis and / or treatment of restenoses and / or thromboses, in particular according to PTCA.
- the present invention also describes a method for the treatment and / or prophylaxis of restenoses and / or thromboses, one or more compounds of the formula (I) being used in combination with a stent the.
- the compounds of the formula (I) can be used either systemically or preferably in the form of a stent containing compounds of the formula (I).
- systemic and / or local administration of further active substances suitable for the treatment and / or prophylaxis of restenoses and / or thromboses such as, for example and preferably, abciximab, eptifibatide, tirofiban, acetylsalicylic acid, ticlopidine or clopi-dogrel can take place .
- additional systemic treatment with compounds of the formula (I) is preferred, in particular by oral administration.
- the basic body of the stent either consisting of metals or non-degradable plastics such as, for example and preferably, polyethylene, polypropylene, polycarbonate, polyurethane and or polytetrafluoroethylene (PTFE).
- PTFE polytetrafluoroethylene
- stents with different constructions of the metal braid which enable different surfaces and folding principles and as described for example in WO 01/037761, WO 01/037892, are used as the stent base body.
- stents are coated with the compounds of the formula (I) and / or crowded.
- compounds of formula (I) in the case of nonmetallic stents can be incorporated directly into the material used to produce the stents.
- carrier materials are mixed with the compounds of the formula (I).
- Polymers are preferably used as carrier materials
- Carriers in particular biocompatible, non-biodegradable polymers or polymer mixtures, such as, for example and preferably, polyacrylates and their copolymers, for example and preferably poly (hydroxyethyl) methyl methacrylates; Polyvinyl pyrrolidones; Cellulose esters and ethers; fluorinated polymers such as, for example, and preferably PTFE; Polyvinyl acetates and their copolymers; cross-linked and uncross-linked polyurethanes, polyethers or polyesters; polycarbonates; Polydimethylsiloxanes.
- biocompatible, non-biodegradable polymers or polymer mixtures such as, for example and preferably, polyacrylates and their copolymers, for example and preferably poly (hydroxyethyl) methyl methacrylates; Polyvinyl pyrrolidones; Cellulose esters and ethers; fluorinated polymers such as, for example, and preferably PTFE; Polyvinyl
- biocompatible, biodegradable polymers or polymer mixtures such as, for example and preferably, polymers or copolymers of lactide and glycolide, or of caprolactone and glycolide; other polyester; polyorthoesters; polyanhydrides; polyaminoacids; polysaccharides; polyiminocarbonates; Polyphosphazenes and poly (ether-ester) copolymers are used as polymeric carriers.
- Mixtures of biodegradable and or non-biodegradable polymers are also suitable as polymeric carriers. These mixtures optimally set the release rate of the active ingredient.
- the mixtures of compounds of the formula (I) and carrier are dissolved, preferably in suitable solvents. These solutions are then implemented using various techniques such as Spray, dip or brush on the stent. After subsequent or simultaneous removal of the solvent, the stent with the active ingredient-containing lacquer is formed. Alternatively, mixtures of compounds of the formula (I) and carrier can also be melted and applied using the same application methods.
- the stents are preferably pretreated to enlarge the outer and / or internal stent surface. This increases the loading potential and larger amounts of lacquer (active ingredient / polymer) can be applied.
- lacquer active ingredient / polymer
- For the pretreatment of the stents for example, various etching techniques but also treatments with ionized radiation are used. Likewise, micro-pores or cavities can be created in the stents using various techniques.
- Stents coated or filled with compounds of the formula (I) generally question from 0.001% by weight to 50% by weight, preferably from 0.01% by weight to 30% by weight, particularly preferably 0.1 % By weight to 15% by weight.
- the compounds of the formula (I) can also be incorporated directly, for example as melt embedding, into the stent base body.
- active substance-containing polymeric carrier compositions are processed to the final active substance-containing form by customary processes, for example by injection molding.
- the active ingredient is usually released by diffusion.
- the active substance contents of stents with embedded compounds of the formula (I) are generally from 0.001% by weight to 70% by weight, preferably from 0.01% by weight to 50% by weight, particularly preferably 0 , 1 wt% to 30 wt%.
- the compounds of the formula (I) containing stents are optionally additionally coated with a membrane.
- This membrane serves as an example and preferably for controlling the drug release and or for protecting the active ingredient-containing stents from external influences. Examples
- BABA n-butyl acetate / n-butanol / glacial acetic acid / phosphate buffer pH 6
- Packing material Symmetry C 18, 50x2.1 mm, 3.5 ⁇ m.
- the solution obtained from 3A) is mixed with 61.25 ml (60.77 g, 0.613 mol) of dimethylaminoacrolein and 56.28 ml (83.88 g, 0.736 mol) of trifluoroacetic acid and boiled under argon for 3 days.
- the solvent is then evaporated in vacuo, the residue is poured into 2 l of water and extracted three times with 1 l of ethyl acetate each time.
- Example I 0.50 g (1.9 mmol) of l- (2-fluorobenzyl) -lH-pyrazolo [3,4-b] pyridine-3-carboximidamide from example ITI and [(dimethylamino) methylene] -pyridineacetonitrile (0.32 g, 1.9 mmol)
- Example I were suspended in xylene and mixed with BF 3 * OEt 2 (71 ⁇ l, 79 mg, 0.56 mmol,
- Retention time 2.7 min (column: Symmetry, C-18, 3.5 ⁇ m, 50X2.1 mm, flow 0.5 ml / min, 40 ° C, gradient: water (+0.1% formic acid): acetonitrile (+0.1% formic acid) at 0 min: 90:10, at 7.5 min 10:90))
- the mother liquor was purified by preparative HPLC (column: Cromsil 120 ODS, C-18, 10 ⁇ m, 250x30 mm, flow 50 ml min, room temperature, gradient: water acetonitrile at 0 min: 90:10, at 28 min 5:95) , The cleaning process had to be repeated.
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Epidemiology (AREA)
- Chemical & Material Sciences (AREA)
- Medicinal Chemistry (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- General Health & Medical Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Pharmacology & Pharmacy (AREA)
- Biomedical Technology (AREA)
- Vascular Medicine (AREA)
- Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Engineering & Computer Science (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10217799 | 2002-04-22 | ||
DE2002117799 DE10217799A1 (de) | 2002-04-22 | 2002-04-22 | Stents |
PCT/EP2003/003950 WO2003089024A1 (de) | 2002-04-22 | 2003-04-16 | Stents enthaltend pyridin-substituierte pyrazolopyridinderivate |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1499369A1 true EP1499369A1 (de) | 2005-01-26 |
Family
ID=28798654
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03746828A Withdrawn EP1499369A1 (de) | 2002-04-22 | 2003-04-16 | Stents enthaltend pyridin-substituierte pyrazolopyridinderivate |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1499369A1 (de) |
AU (1) | AU2003226815A1 (de) |
DE (1) | DE10217799A1 (de) |
WO (1) | WO2003089024A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090196900A1 (en) * | 2008-02-01 | 2009-08-06 | Medtronic Vascular, Inc. | Use of Phosphodiesterase Inhibitor as a Component of Implantable Medical Devices |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19920352A1 (de) * | 1999-05-04 | 2000-11-09 | Bayer Ag | Substituiertes Pyrazolderivat |
AR031176A1 (es) * | 2000-11-22 | 2003-09-10 | Bayer Ag | Nuevos derivados de pirazolpiridina sustituidos con piridina |
-
2002
- 2002-04-22 DE DE2002117799 patent/DE10217799A1/de not_active Withdrawn
-
2003
- 2003-04-16 EP EP03746828A patent/EP1499369A1/de not_active Withdrawn
- 2003-04-16 AU AU2003226815A patent/AU2003226815A1/en not_active Abandoned
- 2003-04-16 WO PCT/EP2003/003950 patent/WO2003089024A1/de not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO03089024A1 * |
Also Published As
Publication number | Publication date |
---|---|
AU2003226815A1 (en) | 2003-11-03 |
WO2003089024A1 (de) | 2003-10-30 |
DE10217799A1 (de) | 2003-11-06 |
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Inventor name: STASCH, JOHANNES-PETER Inventor name: LOW, JEFFREY Inventor name: GRUNKEMEYER, JEFFRY-LYNN Inventor name: STELTE-LUDWIG, BEATRIX Inventor name: WEIGAND, STEFAN Inventor name: FEURER, ACHIM |
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