Compounds

• US 7,064,126 B2
• Filed: 01/15/2004
• Issued: 06/20/2006
• Est. Priority Date: 01/17/2003
• Status: Expired due to Fees

• Current Assignee: Astrazeneca AB (Astrazeneca PLC)
• Original Assignee: Astrazeneca AB (Astrazeneca PLC)
• Inventors: Guile, Simon David, Cooper, Martin Edward, Rasul, Rukhsana Tasneem, Ingall, Anthony Howard
• Primary Examiner(s): Habte, Kahsay
• Application Number:
  US10/542,194
• Publication Number:
  US 20060052380A1
• Time in Patent Office: 887 Days
• Field of Search: 544/235, 514/248
• US Class Current: 514/248
• CPC Class Codes: A61P 1/00 Drugs for disorders of the alimentary tract or the digestive system
• CPC Class Codes: A61P 1/04 for ulcers, gastritis or reflux esophagitis, e.g. antacids, inhibitors of acid secretion, mucosal protectants
• CPC Class Codes: A61P 11/00 Drugs for disorders of the respiratory system
• CPC Class Codes: A61P 11/02 Nasal agents, e.g. decongestants
• CPC Class Codes: A61P 11/06 Antiasthmatics
• CPC Class Codes: A61P 11/08 Bronchodilators
• CPC Class Codes: A61P 13/12 of the kidneys
• CPC Class Codes: A61P 17/00 Drugs for dermatological disorders
• CPC Class Codes: A61P 17/04 Antipruritics
• CPC Class Codes: A61P 17/06 Antipsoriatics
• CPC Class Codes: A61P 17/14 for baldness or alopecia
• CPC Class Codes: A61P 19/02 for joint disorders, e.g. arthritis, arthrosis
• CPC Class Codes: A61P 19/08 for bone diseases, e.g. rachitism, Paget's disease
• CPC Class Codes: A61P 21/04 for myasthenia gravis
• CPC Class Codes: A61P 25/00 Drugs for disorders of the nervous system
• CPC Class Codes: A61P 25/04 Centrally acting analgesics, e.g. opioids
• CPC Class Codes: A61P 27/14 Decongestants or antiallergics
• CPC Class Codes: A61P 29/00 Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
• CPC Class Codes: A61P 3/04 Anorexiants; Antiobesity agents
• CPC Class Codes: A61P 3/10 for hyperglycaemia, e.g. antidiabetics
• CPC Class Codes: A61P 31/08 : for leprosy
• CPC Class Codes: A61P 31/18 : for HIV
• CPC Class Codes: A61P 35/00 : Antineoplastic agents
• CPC Class Codes: A61P 37/02 : Immunomodulators
• CPC Class Codes: A61P 37/06 : Immunosuppressants, e.g. drugs for graft rejection
• CPC Class Codes: A61P 37/08 : Antiallergic agents antiasthmatic agents A61P11/06; ophthalmic antiallergics A61P27/14
• CPC Class Codes: A61P 43/00 : Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
• CPC Class Codes: A61P 9/00 : Drugs for disorders of the cardiovascular system
• CPC Class Codes: A61P 9/10 : for treating ischaemic or atherosclerotic diseases, e.g. antianginal drugs, coronary vasodilators, drugs for myocardial infarction, retinopathy, cerebrovascula insufficiency, renal arteriosclerosis
• CPC Class Codes: C07D 495/04 : Ortho-condensed systems

Abstract

The invention relates to thienopyridazinones of formula (I): wherein: R¹ is C_1-6 alkyl, C_2-6 alkenyl or C_3-6 cycloalkyl which is optionally substituted by C_1-6 alkyl, each of the above being optionally substituted by one or more halogen atoms; R² is C_1-6 alkyl; R³ is a group CO—G or SO₂—G where G is a 5- or 6-membered ring containing a nitrogen atom and a second heteroatom selected from oxygen and sulphur adjacent to the nitrogen, and optionally substituted by up to 3 groups selected from hydroxyl and C_1-4 alkyl; Q is CR⁵R⁶ where R⁵ and R⁶ are as defined in the specification; and R⁴ is a 5- to 10-membered mono- or bi-cyclic aromatic ring system, containing 0 to 4 heteroatoms independently selected from nitrogen, oxygen and sulphur, the ring system being optionally substituted as described in the specification, and pharmaceutically acceptable salts and solvates thereof. Processes for their preparation, pharmaceutical compositions containing them and their use in therapy, in particular in the modulation of autoimmune disease are also described.

Claims

1. A compound of formula (I):

2. A compound according to claim 1 in which R¹ is C_1-6 alkyl or C_3-6 cycloakyl.

3. A compound according to claim 1 in which R² is methyl.

4. A compound according to claim 1 in which R is a group CO—

G.

5. A compound according to claim 1 in which Q is CH₂.

6. A compound according to claim 1 in which R⁴ is a 5 membered aromatic ring containing two heteroatoms optionally substituted as defined in claim 1.

7. A compound according to claim 6 wherein R⁴ is a group of sub-formula (i)

8. A compound according to claim 7 wherein R¹⁰ and R¹¹ are methyl.

9. A compound according to claim 1 selected from:

2-[(3,5-dimethyl-1H-pyrazol-4-yl)methyl]-3-[[(4S)-4-hydroxy-2-isoxazolidinyl]carbonyl-5-methyl-7-(1-methylethyl)thieno[2,3,-d]pyridazin-4(5H)-one,

2-[(3,5-Dimethyl-1H-pyrazol-4-yl)methyl]-3-[[(4S)-4-hydroxy-2-isoxazolidinyl]carbonyl]-5-methyl-7-(2-methylpropyl)thieno[2,3-d]pyridazin-4(5H)-one,

2-[(3,5-dimethyl-1H-pyrazol-4-yl)methyl]-7-ethyl-3-[[(4S)-4-hydroxy-2-isoxazolidinyl]carbonyl]-5-methyl-thieno[2,3-d]pyridazin-4(5H)-one,

7-Cycloprpyl-2[(3,5-dimethyl-1H-pyrazol-4-yl)methyl]-3-[[(4S)-4-hydroxy-2-isoxazolidinyl]carbonyl]-5-methyl-thieno[2,3-d]pyridazin-4(5H)-one,

7-Cyclopropyl-2-[(3,5-dimethyl-1H-pyrazol-4-yl)methyl]-5-ethyl-3-[[(4S)-4-hydroxy-2-isoxazolidinyl]carbonyl]-thieno[2,3-d]pyridazin-4(5H)-one,

2-[(3,5-Dimethyl-1H-pyrazol-4-yl)methyl]-3-[[(4S)-4-methyl-2-isoxazolidinyl]carbonyl-5-methyl-7-(1-methylethyl)thieno[2,3,-d]pyridazin-4(5H)-one,

2-[(3,5-Dimethyl-1H-pyrazol-4-yl)methyl]-3-[[(4S)-4-hydroxy-4-methyl-2-isoxazolidinyl]carbonyl]-5-methyl-7-(2-methylpropyl)-thieno[2,3,-d]pyridazin-4(5H)-one,

2-[(3,5-Dimethyl-1H-pyrazol-40yl)methyl]-7-ethyl-3-[[(4S)-4-hydroxy-4-methyl-2-isoxazolidinyl]carbonyl]-5-methyl-thieno[2,3-d]pyridazin-4(5H)-one,

7-Cyclopropyl-2-[(3,5-dimethyl-1H-pyrazol-4-yl)methyl]-3-[[(4S)-4-hydroxy-4-methyl-2-isoxazolidinyl]carbonyl]-5-methyl-thieno[2,3-d]pyridazin-4(5H)-one,

3-[[(4S)-4-hydroxyisoxazolidinyl]carbonyl-5-methyl-7-(2-methylpropyl)-2-(1H-pyrrolo[2,3-b]pyridine-3-ylmethyl)thieno[2,3,-d]pyridazin-4(5H)-one,

3-[[(4S)-4-Hydroxy-2-isoxazolidinyl]carbonyl]-5-methyl-7-(2-methylpropyl)-2-[(1,3,5-trimethylpyrazol-4-yl)methyl]-thieno[2,3,-d]pyridazin-4(5H)-one,

2-[[3,5-dimethyl-1-(2-pyridinyl)-1H-pyrazol-4-yl]methyl]-7-ethyl-3-[[(4S)-4-hydroxy-2-isoxazolidinyl]carbonyl]-5-methyl-thieno[2,3-d]pyridazin-4(5H)-one,

2-[[3,5-Dimethyl-1-(2-pyridinyl)-1H-pyrazol-4-yl]methyl]-7-ethyl-3-[[(4S)-4-hydroxy-4-methyl-2-isoxazolidinyl]carbonyl]-5-methyl-thieno[2,3-d]pyridazin-4(5H)-one,

7-Ethyl-3-{[(4S)-4-hydroxy-4-methylisoxazolidin-2-yl]carbonyl}-5-methyl-2-(1H-pyrrolo[2,3-b]pyridin-3-ylmethyl)thieno[2,3-d]pyridazin-4(5H)-one,

2-[(3,5-Dimethyl-1-(2-pyridinyl)-1H-pyrazol-4-yl)methyl]-3-[[(4S)-4-hydroxy-4-methyl-2-isoxazolidinyl]carbonyl-5-methyl-7-(1-methylethyl)thieno[2,3,-d]pyridazin-4(5H)-one,

2-[(3,5-Dimethyl-1-(2-pyrimidinyl)-1H-pyrazol-4-yl)methyl]-3-[[(4S)-4-hydroxy-4-methyl-2-isoxazolidinyl]carbonyl-5-methyl-7-(1-methylethyl)thieno[2,3,-d]pyridazin-4(5H)-one,

2-[(3,5-Dimethyl-1-(2-thiazolyl)-1H-pyrazol-4-yl)methyl]-3-[[(4S)-4-hydroxy-4-methyl-2-isoxazolidinyl]carbonyl-5-methyl-7-(1-methylethyl)thieno[2,3,-d]pyridazin-4(5H)-one

and pharmaceutically acceptable salts thereof.

10. A pharmaceutical composition comprising a compound of formula (I) or a pharmaceutically acceptable salt thereof as defined in claim 1 in association with a pharmaceutical carrier.

11. A process for the preparation of a compound of formula (I) which comprises:

(a) for compounds of formula (I) where R³ is COG;

reaction of a compound of formula (II);