WO2011036127A1 - Imidazopyridine or imidazopyrimidine derivatives as phosphodiesterase 10a inhibitors - Google Patents
Imidazopyridine or imidazopyrimidine derivatives as phosphodiesterase 10a inhibitors Download PDFInfo
- Publication number
- WO2011036127A1 WO2011036127A1 PCT/EP2010/063830 EP2010063830W WO2011036127A1 WO 2011036127 A1 WO2011036127 A1 WO 2011036127A1 EP 2010063830 W EP2010063830 W EP 2010063830W WO 2011036127 A1 WO2011036127 A1 WO 2011036127A1
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- WO
- WIPO (PCT)
- Prior art keywords
- amide
- methyl
- imidazo
- phenyl
- pyrazole
- Prior art date
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- 239000003112 inhibitor Substances 0.000 title claims description 12
- 101001072037 Homo sapiens cAMP and cAMP-inhibited cGMP 3',5'-cyclic phosphodiesterase 10A Proteins 0.000 title abstract description 12
- 102100036377 cAMP and cAMP-inhibited cGMP 3',5'-cyclic phosphodiesterase 10A Human genes 0.000 title abstract description 11
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- 238000000034 method Methods 0.000 claims description 28
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- 210000001685 thyroid gland Anatomy 0.000 description 1
- 238000011200 topical administration Methods 0.000 description 1
- 230000000699 topical effect Effects 0.000 description 1
- 125000001425 triazolyl group Chemical group 0.000 description 1
- WLPUWLXVBWGYMZ-UHFFFAOYSA-N tricyclohexylphosphine Chemical compound C1CCCCC1P(C1CCCCC1)C1CCCCC1 WLPUWLXVBWGYMZ-UHFFFAOYSA-N 0.000 description 1
- 230000004584 weight gain Effects 0.000 description 1
- 235000019786 weight gain Nutrition 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
- 239000011686 zinc sulphate Substances 0.000 description 1
- 235000009529 zinc sulphate Nutrition 0.000 description 1
Classifications
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- C07D471/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
- C07D471/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains two hetero rings
- C07D471/04—Ortho-condensed systems
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- 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
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- 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
- A61K31/496—Non-condensed piperazines containing further heterocyclic rings, e.g. rifampin, thiothixene or sparfloxacin
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- A61K31/50—Pyridazines; Hydrogenated pyridazines
- A61K31/5025—Pyridazines; Hydrogenated pyridazines ortho- or peri-condensed with heterocyclic ring systems
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- A61K31/535—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and one oxygen as the ring hetero atoms, e.g. 1,2-oxazines
- A61K31/5375—1,4-Oxazines, e.g. morpholine
- A61K31/5377—1,4-Oxazines, e.g. morpholine not condensed and containing further heterocyclic rings, e.g. timolol
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- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/55—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole
- A61K31/553—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole having at least one nitrogen and one oxygen as ring hetero atoms, e.g. loxapine, staurosporine
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D487/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00
- C07D487/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00 in which the condensed system contains two hetero rings
- C07D487/04—Ortho-condensed systems
Definitions
- the invention is concerned with novel imidazopyridine derivatives of formula (I)
- A is N or C(R 6 );
- R 1 is hydrogen, lower-alkyl or fluoro-lower-alkyl
- R 2 is halogen, C(0)NR 7 R 8 or C(0)OR 9 ;
- R 3 is hydrogen, NR 10 R n , lower-alkyl, lower-alkoxy, fluoro-lower-alkyl or fluoro-lower- alkoxy;
- R 4 is hydrogen, lower-alkyl, fluoro-lower-alkyl, lower alkoxy or f uoro-lower-alkoxy;
- R 5 is aryl or heteroaryl, which can optionally be substituted by 1 to 3 substituents
- halogen independently selected from the group consisting of halogen, lower-alkyl, lower-alkoxy, fluoro-lower-alkyl, fluoro-lower-alkoxy and hydroxy;
- R 6 is hydrogen, halogen, CN, cycloalkyl, lower-alkyl, cycloalkyl-lower-alkyl, lower-alkoxy, fluoro-lower-alkyl or fluoro-lower-alkoxy;
- R 7 and R 8 independently from each other are selected from the group consisting of hydrogen, lower-alkyl, lower-alkoxy-lower-alkyl, fluoro-lower-alkyl, cycloalkyl, cycloalkyl-lower- alkyl, NH 2 -lower-alkyl, N(H,lower-alkyl)-lower-alkyl, N(lower-alkyl 2 )-lower-alkyl, hydroxy- lower-alkyl, hydroxy- lower-alkoxy- lower-alkyl, NH 2 C(0)-lower-alkyl,
- tetrahydrofuranyl, aryl and heteroaryl which aryl or heteroaryl can optionally be substituted by 1 to 3 substituents independently selected from the group consisting of halogen, lower-alkyl, lower-alkoxy, fluoro-lower-alkyl, fluoro-lower-alkoxy and hydroxy, or R 7 and R 8 , together with the nitrogen atom to which they are attached, form a heterocyclyl selected from the group consisting of pyrrolidinyl, azetidinyl, morpholinyl, 5,6-dihydro-8-H-[l,2,4]triazolo[4,3-a]pyrazinyl, 3,4-dihydro-lH-pyrrolo[l,2-a]pyrazinyl, 2-oxa-6-aza-spiro[3.3]heptyl, 5,6-dihydro-8H-imidazo[l,2-a]pyrazinyl, [l,4]ox
- R 9 is hydrogen, lower-alkyl, or fluoro-lower-alkyl
- R 10 and R 11 independently from each other are hydrogen, lower-alkyl or fluoro-lower-alkyl
- R 10 and R 11 together with the nitrogen atom to which they are attached, form a heterocyclyl selected from the group consisting of piperidinyl, morpholinyl, pyrrolidinyl, azetidinyl and piperazinyl, which heterocyclyl can optionally be substituted by 1 to 3 substituents independently selected from the group consisting of halogen, lower-alkyl, lower-alkoxy, fluoro-lower-alkyl and fluoro-lower-alkoxy; and pharmaceutically acceptable salts and esters thereof.
- the invention is concerned with a process for the manufacture of the above compounds, pharmaceutical preparations which contain such compounds as well as the use of these compounds for the production of pharmaceutical preparations.
- Schizophrenia is a progressive and devastating neurological disease characterized by episodic positive symptoms such as delusions, hallucinations, thought disorders and psychosis and persistent negative symptoms such as flattened affect, impaired attention and social withdrawal, and cognitive impairments (Lewis DA and Lieberman JA, Neuron, , 28:325-33, 2000).
- episodic positive symptoms such as delusions, hallucinations, thought disorders and psychosis
- persistent negative symptoms such as flattened affect, impaired attention and social withdrawal, and cognitive impairments
- For decades research has focused on the "dopaminergic hyperactivity" hypothesis which has led to therapeutic interventions involving blockade of the dopaminergic system (Vandenberg RJ and Aubrey KR., Exp. Opin. Ther. Targets, 5(4): 507-518, 2001; Nakazato A and Okuyama S, et al, Exp. Opin. Ther.
- Patents, 10(1): 75-98, 2000 This pharmacological approach, besides ameliorating positive symptoms in schizophrenic patients, poorly addresses negative and cognitive symptoms which are the best predictors of functional outcome (Sharma T., Br.J. Psychiatry, 174(suppl. 28): 44-51, 1999).
- current antipsychotic treatment is associated with adverse effects like weight gain, extrapyramidal symptoms or effects on glucose and lipid metabolism, related to their unspecific pharmacology.
- Cyclic nucleotides cyclic adenosine monophosphate (cAMP) and cyclic guanosine monophosphate (cGMP) are ubiquitous second messengers responsible for mediating the biological response of a variety of extracellular signals, including neurotransmitters, light and hormones.
- cAPM and cGMP regulate a variety of intracellular processes particularly in neurons of the central nervous system by activating cAMP- and cGMP-dependent kinases which then phosphorylate proteins involved in the regulation of synaptic transmission, neuronal differentiation and survival.
- Phosphodiesterases are a family of widely expressed enzymes encoded by 21 different genes in humans, with each gene encoding several splice variants (Beavo, J., Physiol. Rev. 1995, 75, 725-748; Conti, M., Jin, S.L., Prog. Nucleic Acid Res. Mol. Biol. 1999, 63, 1-38; Soderling, S.H., Beavo, J.A., Curr. Opin. Cell Biol. 2000,12, 174-179, Manallack, D.T. et al. J. Med.Chem. 2005, 48 (10), 3449-3462).
- the PDE families differ in their substrate specificy for the cyclic nucleotides, their mechanism of regulation and their sensitivity to inhibitors. Moreover, they are differentially localized in the organism, among the cells of an organ and even within the cells. These differences lead to a differentiated involvement of the PDE families in the various physiological functions.
- PDE 1 OA is a dual substrate PDE encoded by a single gene as reported in 1999 by three separate research groups (Fujishige K., et al, Eur J Biochem (1999) 266(3): 1118-1127, Soderling S.H., et al, ProcNatl Acad Sci USA (1999) 96(12):7071-7076, Loughney K., et al, Gene (1999) 234(1): 109-117).
- PDE10A is unique from other members of the multigene family with respect to amino acid sequence (779 aa), tissue-specific pattern of expression, affinity for cAMP and cGMP and the effect on PDE activity by specific and general inhibitors.
- PDE 1 OA has one of the most restricted distribution of any PDE family being primarily expressed in the brain particularly in the nucleus accumbens and the caudate putamen. Additionally thalamus, olfactory bulb, hippocampus and frontal cortex show moderate levels of PDE 1 OA expression. All these brain areas have been suggested to be involved in the pathophysiology of schizophrenia and psychosis, suggesting a central role of PDE 1 OA in this devastating mental illness. Outside the central nervous system PDE 1 OA transcript expression is also observed in peripheral tissues like thyroid gland, pituitary gland, insulin secreting pancreatic cells and testes (Fujishige, K. et al, J. Biol. Chem. 1999, 274, 18438-18445, Sweet, L.
- mR A and protein are expressed only in the GABA ( ⁇ -aminobutyric acid)-containing medium spiny projection neurons making it an intriguing target for the treatment of diseases of the central nervous system (Fujishige, K. et al, Eur. J. Biochem. 1999, 266, 1118-1127; Seeger, T.F. et al, Brain Res. 2003, 985, 113-126).
- GABA ⁇ -aminobutyric acid
- the basal ganglia are a series of interconnected subcortical nuclei that integrate widespread cortical input with dopaminergic signaling to plan and execute relevant motor and cognitive patterns while suppressing unwanted or irrelevant patterns (Graybiel, A.M. Curr. Biol. 2000, 10, R509-R511 (2000).
- Papaverine, a relatively specific PDE10A inhibitor, and PDE1 OA-knockout mice have been used to explore the physiology of this enzyme and the possible therapeutic utility of PDE10A inhibition.
- Inhibition of this enzyme pharmacologically or through gene disruption causes a reduction in activity and a reduced response to psychomotor stimulants. Inhibition also reduces the conditioned avoidance response, a behavioural response that is predictive of clinical antipsychotic activity (Siuciak, J.A.; et al, Neuropharmacology 2006, 51 (2), 386-396; Siuciak, J.A.; et al, Neuropharmacology 2006, 51 (2), 374-385).
- PDE10A inhibition bears the potential to improve the negative and cognitive symptoms associated to schizophrenia.
- papaverine have been shown to attenuate the deficits in the extra-dimensional shift learning induced in rats by sub-chronic treatment with PCP, an animal paradigm of NMD A receptor hypofunction (Rodefer, J,S., et al, Eur. J. Neuroscience 2005, 2, : 1070- 1076).
- increased social interaction in PDE10A2-deficient mice have been observed (Sano, H. J. Neurochem. 2008, 105, 546-556).
- Diseases that can be treated with PDE10A inhibitors include, but are not limited to, diseases thought to be mediated in part by dysfunction of the basal ganglia, of other parts of the central nervous system and of other PDE10A expressing tissues.
- diseases can be treated, where inhibition of PDE10A can have therapeutic effects.
- These diseases include, but are not limited to, certain psychotic disorders such as schizophrenia, positive, negative and/or cognitive symptoms associated with schizophrenia, delusional disorder or substance-induced psychotic disorder, anxiety disorders such as panic disorder, obsessive-compulsive disorder, acute stress disorder or generalized anxiety disorder, obsessive/compulsive disorders, drug addictions, movement disorders such as Parkinson's disease or restless leg syndrome, cognition deficiency disorders such as Alzheimer's disease or multi-infarct dementia, mood disorders such as depression or bipolar disorders, or neuropsychiatric conditions such as psychosis, attention-deficit/hyperactivity disorder (ADHD) or related attentional disorders.
- psychotic disorders such as schizophrenia, positive, negative and/or cognitive symptoms associated with schizophrenia, delusional disorder or substance-induced psychotic disorder, anxiety disorders such as panic disorder, obsessive-compulsive disorder, acute stress disorder or generalized anxiety disorder, obsessive/compulsive disorders, drug addictions, movement disorders such as Parkinson's disease or restless leg
- the compounds of the present invention are also suitable for the treatment of diabetes and related disorders such as obesity by regulating the cAMP signaling system.
- PDEIOA inhibitors might also be useful in preventing neurons from undergoing apoptosis by raising cAMP and cGMP levels and, thus, might possess anti-inflammatory properties.
- Neurodegenerative disorders treatable with PDEIOA inhibitors include, but are not limited to, as Alzheimer's disease, Huntington's disease, Parkinson's disease, multiple sclerosis, stroke or spinal cord injury.
- cAMP and cGMP The growth of cancer cells is inhibited by cAMP and cGMP.
- PDEIOA inhibitors can also be used for the treatment of different solid tumors and hematological malignancies such as renal cell carcinoma or breast cancer.
- halogen refers to fluorine, chlorine, bromine and iodine, with fluorine, chlorine and bromine being preferred.
- alkyl refers to a branched or straight-chain monovalent saturated aliphatic hydrocarbon radical of one to twenty carbon atoms, preferably one to sixteen carbon atoms, more preferably one to ten carbon atoms. Lower-alkyl groups as described below also are preferred alkyl groups.
- lower-alkyl refers to a branched or straight-chain monovalent alkyl radical of one to seven carbon atoms, preferably one to four carbon atoms. This term is further exemplified by such radicals as methyl, ethyl, n-propyl, isopropyl, n-butyl, s-butyl, t-butyl and the like.
- cycloalkyl refers to a monovalent carbocyclic radical of 3 to 10 carbon atoms, preferably 3 to 6 carbon atoms, such as cyclopropyl, cyclobutyl, cyclopentyl, or cyclohexyl.
- fluoro-lower-alkyl refers to lower-alkyl groups which are mono- or multiply substituted with fluorine.
- fluoro-lower-alkyl groups are e.g. CFH 2 , CF 2 H, CF 3 , CF 3 CH 2 , CF 3 (CH 2 ) 2 , (CF 3 ) 2 CH and CF 2 H-CF 2 ..
- alkoxy refers to the group R'-O-, wherein R' is an alkyl.
- lower- alkoxy refers to the group R'-O-, wherein R' is a lower-alkyl.
- fluoro-lower-alkoxy refers to the group R"-0-, wherein R" is fluoro-lower- alkyl.
- fluoro-lower-alkoxy groups are e.g. CFH 2 -0, CF 2 H-0, CF 3 -0, CF 3 CH 2 -0, CF 3 (CH 2 ) 2 -0, (CF 3 ) 2 CH-0, and CF 2 H-CF 2 -0.
- hydroxy-lower-alkyl refers to a lower-alkyl group as defined above, which is substituted by 1 to 3 hydroxy groups.
- hydroxy-lower-alkyl groups are e.g. hydro xy- methyl, hydro xy-ethyl, hydroxy propyl, 3 -hydroxy-propyl, 2-hydroxy-propyl, 3-hydroxy-prop-2- yl, 2,3-dihydroxy-propyl and l,3-dihydroxy-prop-2-yl.
- hydroxy-lower-alkoxy refers to a lower-alkoxy group as defined above, which is substituted by 1 to 3 hydroxy groups.
- hydroxy-lower-alkoxy groups are e.g. hydroxy-methoxy, hydroxy-ethoxy, hydroxy-propoxy, 3-hydroxy-propoxy, 2-hydroxy-propoxy, 3-hydroxy-prop-2-oxy, 2,3-dihydroxy-propoxy and l,3-dihydroxy-prop-2-oxy.
- hydroxy-f uoro-lower-alkyl refers to a fluoro-lower-alkoxy group as defined above, which is substituted by 1 to 3 hydroxy groups.
- hydroxy- fluoro-lower-alkoxy groups are e.g. 2,2,2-trif uoro-l -hydro xy-ethyl, 3,3,3-trifluoro-2-hydroxy-propyl.
- aryl alone or in combination, relates to the phenyl or naphthyl group, preferably the phenyl group, which can optionally be substituted, unless specifically stated otherwise, by 1 to 5 , preferably 1 to 3, substituents, independently selected from the group consisting of halogen, hydroxy, amino, N0 2 , lower-alkyl, hydroxy-lower-alkyl, lower-alkoxy, carboxy, carboxy-lower-alkyl, H 2 NC(0), (H,lower-alkyl)NC(0), (lower-alkyl) 2 NC(0), fluoro- lower-alkyl, lower-alkyl-S0 2 , lower-alkyl-S0 2 0, lower-alkyl-S0 2 -NH, lower-alkyl-S0 2 - N(lower-alkyl), H 2 NS0 2 , (H,lower-alkyl)NS0 2 , (lower-alkyl) 2 NS0 2 ,
- Preferred substituents can be halogen, lower-alkyl, lower- alkoxy, fluoro-lower-alkyl and fluoro-lower-alkoxy.
- aryl groups can preferably be substituted as described in the description and claims below.
- heteroaryl refers to an aromatic 5 to 6 membered monocyclic ring or 9 to 10 membered bicyclic ring which can comprise 1, 2 or 3 atoms selected from nitrogen, oxygen and/or sulphur, such as furyl, pyridinyl, pyridazinyl, pyrimidinyl, pyrazinyl, thienyl, isoxazolyl, oxazolyl, oxadiazolyl, imidazolyl, pyrrolyl, pyrazolyl, triazolyl, tetrazolyl, thiazolyl, isothiazolyl, thiadiazolyl, benzo imidazolyl, indolyl, indazolyl, benzothiazolyl, benzo isothiazolyl,
- heteroaryl groups are pyridinyl or thiazolyl. Unless specifically stated otherwise, a heteroaryl group may optionally have a substitution pattern as described earlier in connection with the term "aryl”. Furthermore, heteroaryl groups can preferably be substituted as described in the description and claims below.
- Compounds of formula (I) can form pharmaceutically acceptable acid addition salts.
- salts of compounds of formula (I) are salts of compounds of formula (I) with physiologically compatible mineral acids, such as hydrochloric acid, sulphuric acid, sulphurous acid or phosphoric acid; or with organic acids, such as methanesulphonic acid, p- toluenesulphonic acid, acetic acid, lactic acid, trifluoro acetic acid, citric acid, fumaric acid, maleic acid, tartaric acid, succinic acid or salicylic acid.
- physiologically compatible mineral acids such as hydrochloric acid, sulphuric acid, sulphurous acid or phosphoric acid
- organic acids such as methanesulphonic acid, p- toluenesulphonic acid, acetic acid, lactic acid, trifluoro acetic acid, citric acid, fumaric acid, maleic acid, tartaric acid, succinic acid or salicylic acid.
- pharmaceutically acceptable salts refers to such salts.
- salts examples include alkaline, earth- alkaline and ammonium salts such as e.g. Na-, K-, Ca- and trimethylammoniumsalt.
- pharmaceutically acceptable salts also refers to such salts. Salts obtained by the addition of an acid are preferred.
- esters embraces derivatives of the compounds of formula (I), in which a carboxy group has been converted to an ester.
- esters are preferred esters.
- pharmaceutically acceptable esters furthermore embraces compounds of formula (I) in which hydroxy groups have been converted to the corresponding esters with inorganic or organic acids such as, nitric acid, sulphuric acid, phosphoric acid, citric acid, formic acid, maleic acid, acetic acid, succinic acid, tartaric acid, methanesulphonic acid, p-toluenesulphonic acid and the like, which are non toxic to living organisms.
- A is N or C(R 6 );
- R 1 is hydrogen, lower-alkyl or fluoro-lower-alkyl
- R 2 is halogen, C(0)NR 7 R 8 or C(0)OR 9 ;
- R 3 is hydrogen, NR 10 R n , lower-alkyl, lower-alkoxy, fluoro-lower-alkyl or fluoro-lower- alkoxy;
- R 4 is hydrogen, lower-alkyl, fluoro-lower-alkyl, lower alkoxy or fluoro-lower-alkoxy;
- R 5 is aryl or heteroaryl, which can optionally be substituted by 1 to 3 substituents
- halogen independently selected from the group consisting of halogen, lower-alkyl, lower-alkoxy, fluoro-lower-alkyl, fluoro-lower-alkoxy and hydroxy;
- R 6 is hydrogen, halogen, CN, cycloalkyl, lower-alkyl, cycloalkyl-lower-alkyl, lower-alkoxy, fluoro-lower-alkyl or fluoro-lower-alkoxy;
- R 7 and R 8 independently from each other are selected from the group consisting of hydrogen, lower-alkyl, lower-alkoxy-lower-alkyl, fluoro-lower-alkyl, cycloalkyl, cycloalkyl-lower- alkyl, NH 2 -lower-alkyl, N(H,lower-alkyl)-lower-alkyl, N(lower-alkyl 2 )-lower-alkyl, hydroxy- lower-alkyl, hydroxy- lower-alkoxy- lower-alkyl, NH 2 C(0)-lower-alkyl, N(H,lower-alkyl)C(0)-lower-alkyl, N(lower-alkyl 2 )C(0)-lower-alkyl, lower-alkoxy, hydro xy-lower-alkyl-oxetanyl- lower-alkyl, oxo-tetrahydrofuranyl, tetrahydrofuranyl-
- tetrahydrofuranyl, aryl and heteroaryl which aryl or heteroaryl can optionally be substituted by 1 to 3 substituents independently selected from the group consisting of halogen, lower-alkyl, lower-alkoxy, fluoro-lower-alkyl, fluoro-lower-alkoxy and hydroxy, or R 7 and R 8 , together with the nitrogen atom to which they are attached, form a heterocyclyl selected from the group consisting of pyrrolidinyl, azetidinyl, morpholinyl, 5,6-dihydro-8-H-[l,2,4]triazolo[4,3-a]pyrazinyl, 3,4-dihydro-lH-pyrrolo[l,2-a]pyrazinyl,
- heterocyclyl can optionally be substituted by 1 to 3 substituents independently selected from the group consisting of halogen, lower-alkyl, lower-alkyl-C(O), oxo, hydroxy, hydroxy- lower-alkyl, N(lower-alkyl 2 ), NH 2 , N(H,lower-alkyl), fluoro-lower-alkyl, fluoro-lower-alkyl-C(O), lower-alkoxy and fluoro-lower-alkoxy;
- R 9 is hydrogen, lower-alkyl, or fluoro-lower-alkyl
- R 10 and R 11 independently from each other are hydrogen, lower-alkyl or fluoro-lower-alkyl
- R 10 and R 11 together with the nitrogen atom to which they are attached, form a heterocyclyl selected from the group consisting of piperidinyl, morpholinyl, pyrrolidinyl, azetidinyl and piperazinyl, which heterocyclyl can optionally be substituted by 1 to 3 substituents independently selected from the group consisting of halogen, lower-alkyl, lower-alkoxy, fluoro-lower-alkyl and fluoro-lower-alkoxy; and pharmaceutically acceptable salts and esters thereof.
- Compounds of formula (I) are individually preferred and physiologically acceptable salts thereof are individually preferred and pharmaceutically acceptable esters thereof are individually preferred, with the compounds of formula (I) being particularly preferred.
- the compounds of formula (I) can have one or more asymmetric C atoms and can therefore exist as an enantiomeric mixture, mixture of stereoisomers or as optically pure compounds.
- a preferred embodiment of the present invention relates to compounds of formula (I) as described above, wherein A is N.
- Other preferred compounds are those, wherein A is C(R 6 ) and R 6 is as defined above.
- R 1 is hydrogen or lower alkyl, more preferably methyl.
- Another preferred embodiment of the present invention relates to compounds of formula (I) as described above, wherein A is N.
- Other preferred compounds are those, wherein A is C(R 6 ) and R 6 is as defined above.
- R 1 is hydrogen or lower alkyl, more preferably methyl.
- Another preferred embodiment of the present invention relates to compounds of formula (I) as described above, wherein A is N.
- Other preferred compounds are those, wherein A is C(R 6 ) and R 6 is as defined above.
- R 1 is hydrogen or lower alkyl, more preferably methyl.
- Another preferred embodiment of the present invention relates to compounds of formula (I) as described above, wherein A is N.
- Other preferred compounds are those, wherein A is
- R is C(0)NR R and R and R are as defined above. It is furthermore preferred, that R 3 is hydrogen or NR 10 R n and R 10 and R 11 are as defined above. Compounds, wherein R 3 is hydrogen, are particularly preferred.
- R 4 is hydrogen or lower-alkyl, more preferably hydrogen.
- R 5 is phenyl or thiazolyl, which can optionally be substituted by 1 to 2 substituents independently selected from halogen. More preferably, R 5 is phenyl.
- R 6 is hydrogen, halogen, CN or cycloalkyl, particularly those, wherein R 6 is hydrogen, CN, bromo, chloro or cyclopropyl.
- R 7 and R 8 independently from each other are selected from the group consisting of hydrogen, lower-alkyl, lower-alkoxy-lower-alkyl, fluoro-lower-alkyl, cycloalkyl, N(H,lower-alkyl)-lower-alkyl, hydroxy- lower-alkyl, hydroxy- lower-alkoxy- lower-alkyl, N(lower-alkyl 2 )C(0)-lower-alkyl, lower-alkoxy, 3-(hydroxy-lower-alkyl)-oxetan-3-yl- lower-alkyl, 2-oxo-tetrahydrofuranyl, tetrahydrofuranyl-lower-alkyl
- R 7 and R 8 together with the nitrogen atom to which they are attached, form a heterocyclyl selected from the group consisting of pyrrolidinyl, azetidinyl, morpholinyl, 5,6-dihydro-8-H- [l,2,4]triazolo[4,3-a]pyrazinyl, 3,4-dihydro-lH-pyrrolo[l,2-a]pyrazinyl, 2-oxa-6-aza- spiro[3.3]heptyl, 5,6-dihydro-8H-imidazo[l,2-a]pyrazinyl, [l,4]oxazepanyl, piperazinyl, thiomorpholinyl and 2-oxa-5-aza-bicyclo[2.2.1]heptyl, which heterocyclyl can optionally be substituted by 1 to 3 substituents independently selected from the group consisting of halogen, lower-alkyl, lower-alkyl-C(O), lower
- R 7 and R 8 independently from each other are selected from the group consisting of hydrogen, lower-alkyl, lower-alkoxy-lower-alkyl and hydroxy-lower-alkyl, or R 7 and R 8 , together with the nitrogen atom to which they are attached, form a heterocyclyl selected from the group consisting of azetidinyl and morpholinyl, which heterocyclyl can optionally be substituted by 1 to 2 substituents independently selected from the group consisting of halogen and hydroxy.
- R 7 and R 8 independently from each other are selected from the group consisting of hydrogen, methyl, 3-methoxy-propyl and 3 -hydroxy-propyl, or R 7 and R 8 , together with the nitrogen atom to which they are attached, form 3,3-difluoro- azetidin-l-yl, morpholin-4-yl, azetidin-l-yl or 3-hydroxy-azetidin-l-yl.
- Another preferred embodiment of the present invention refers to compounds as defined above, wherein R 9 is lower-alkyl.
- Other preferred compounds of the present invention are those, wherein R 10 and R 11 , together with the nitrogen atom to which they are attached, form
- preferred compounds are the compounds of formula (I) described in the examples as individual compounds as well as pharmaceutically acceptable salts as well as pharmaceutically acceptable esters thereof. Furthermore, the substituents as found in the specific examples described below, individually constitute separate preferred embodiments of the present invention.
- Preferred compounds of formula (I) are those selected from the group consisting of: 4-Chloro-2-methyl-2H-pyrazole-3-carboxylic acid (2 -phenyl- imidazo[l,2-a]pyridin-7-yl)-amide, 2-Methyl-2H-pyrazole-3,4-dicarboxylic acid 4-amide 3-[(2-phenyl-imidazo[l,2-a]pyridin-7-yl)- amide],
- Particularly preferred compounds of formula (I) are those selected from the group consisting of:
- the compounds of general formula (I) in this invention may be derivatised at functional groups to provide derivatives which are capable of conversion back to the parent compound in vivo.
- the invention further relates to a process for the manufacture of compounds of formula (I) as defined above, which process comprises reacting a compound of formula (II)
- R 1 , R 2 , R 3 , R 4 , R 5 and A are as defined above.
- reaction of a compound of formula (II) with a compound of formula (III) can be carried out under conditions as described in the examples or under conditions well known to the person skilled in the art.
- the reaction can be performed in solvents like dimethylformamide (DMF), tetrahydroiurane (THF), dioxane, dichloromethane, ethyl acetate, 1- methyl-2-pyrolidone (NMP) and the like at temperatures in the range of e.g. at -10 - 120 °C, but typically at 0 °C - room temperature, at atmospheric pressure or elevated pressure.
- the reaction can be carried out in one step or in several steps.
- the conversion is usually accomplished with a coupling reagent, such as ⁇ , ⁇ '- dicyclohexylcarbodiimide (DCC), N-(3-dimethylaminopropyl)-N'-ethylcarbodiimide hydrochloride (EDC), 2-(lH-benzotriazole-l-yl)-l,l,3,3-tetramethyluronium tetrafluoroborate (TBTU), propylphosphonic anhydride, and the like (a large number of chemically diverse coupling reagents are described in the literature).
- DCC dicyclohexylcarbodiimide
- EDC N-(3-dimethylaminopropyl)-N'-ethylcarbodiimide hydrochloride
- TBTU 2-(lH-benzotriazole-l-yl)-l,l,3,3-tetramethyluronium tetrafluoroborate
- the acid (II) is usually transformed into a reactive species such as an acid chloride or an acid anhydride, for instance by reaction with thionyl chloride, sulphuryl chloride, phosphoroxychloride, oxalylchloride, or the like, with or without a solvent such as dichloromethane, with or without an additive such as DMF.
- a reactive species such as an acid chloride or an acid anhydride
- a solvent such as dichloromethane
- an additive such as DMF
- the second step is typically carried out in a solvent such as dimethylformamide (DMF), tetrahydroiurane (THF), dioxane, dichloromethane, ethyl acetate, l-methyl-2-pyrolidone (NMP) and the like at temperatures in the range of e.g. at - 10 - 120 °C, but typically at 0 °C - room temperature, at atmospheric pressure or elevated pressure. It is often advantageous to add a base, such as triethylamine or diisopropylethylamine, to the reaction mixture.
- a solvent such as dimethylformamide (DMF), tetrahydroiurane (THF), dioxane, dichloromethane, ethyl acetate, l-methyl-2-pyrolidone (NMP) and the like at temperatures in the range of e.g. at - 10 - 120 °C, but typically at 0 °C - room temperature, at atmospheric
- the present invention also relates to compounds of formula (I) as defined above, when prepared by a process as described above.
- Compounds of formula 1 can be prepared from building blocks 2 and 3 according to Scheme 1.
- the conversion commonly known as amide coupling, can be achieved in several ways.
- the acid 2 is activated with a coupling reagent, such as 2-(lH- benzotriazole-l-yl)-l,l,3,3-tetramethyluronium tetrafluoroborate (TBTU), and converted by addition of amine 3 to the desired product, 1.
- TBTU 2-(lH- benzotriazole-l-yl)-l,l,3,3-tetramethyluronium tetrafluoroborate
- the acid 2 is activated by transformation into an acid chloride, e.g. by reaction with thionyl chloride.
- the acid chloride is then converted by addition of the amine 3 to the desired product, 1.
- a base e.g.
- DIPEA diisopropylethylamine
- step a Ester 6 is then saponified, e.g. by reaction with KOH (step b).
- the obtained acid 7 is then subjected to a rearrangement-degradation reaction to yield a carbamate 8 (step c).
- acid e.g. trifluoro acetic acid.
- compounds of formula 3 can be prepared from pyridinediamines or
- pyrimidinediamines 9 by reaction with 5, and a suitable base, such as NaHCC"3 (step e).
- R 13 alkyl
- X leaving
- R 4 alkyl
- 1-COOEt can be saponified, e.g. by reaction with KOH, to give 15 (step 1).
- acid 15 can be converted with a primary or secondary amine to l-CONR 2 (step m).
- 1-COOEt can be directly converted into l-CONR 2 , e.g. by reaction with an amine such as methylamine (step n).
- the corresponding salts with acids can be obtained by standard methods known to the person skilled in the art, e.g. by dissolving the compound of formula(I) in a suitable solvent such as e.g. dioxan or THF and adding an appropriate amount of the corresponding acid.
- a suitable solvent such as e.g. dioxan or THF
- the products can usually be isolated by filtration or by chromatography.
- the conversion of a compound of formula (I) into a pharmaceutically acceptable salt with a base can be carried out by treatment of such a compound with such a base.
- One possible method to form such a salt is e.g. by addition of 1/n equivalents of a basic salt such as e.g.
- a suitable solvent e.g. ethanol, ethanol-water mixture, tetrahydroiuran- water mixture
- the conversion of compounds of formula (I) into pharmaceutically acceptable esters can be carried out e.g. by treatment of a suitable carboxy group present in the molecule with a suitable alcohol using e.g. a condensating reagent such as benzotriazol-1- yloxytris(dimethylamino)phosphonium hexafluorophosphate (BOP), N,N- dicylohexylcarbodiimide (DCC), N-(3-dimethylaminopropyl)-N'-ethylcarbodiimide
- a condensating reagent such as benzotriazol-1- yloxytris(dimethylamino)phosphonium hexafluorophosphate (BOP), N,N- dicylohexylcarbodiimide (DCC), N-(3-dimethylaminopropyl)-N'-ethylcarbodiimide
- novel compounds of the present invention have been found to inhibit PDEIOA activity.
- the compounds of the present invention can therefore be used, either alone or in combination with other drugs, for the treatment and/or prophylaxis of diseases which are modulated by PDEIOA inhibitors.
- These diseases include, but are not limited to, certain psychotic disorders such as schizophrenia, positive, negative and/or cognitive symptoms associated with schizophrenia, delusional disorder or substance-induced psychotic disorder, anxiety disorders such as panic disorder, obsessive/compulsive disorders, acute stress disorder or generalized anxiety disorder, drug addictions, movement disorders such as Parkinson's disease or restless leg syndrome, cognition deficiency disorders such as Alzheimer's disease or multi- infarct dementia, mood disorders such as depression or bipolar disorders, or neuropsychiatric conditions such as psychosis, attention-deficit/hyperactivity disorder (ADHD) or related attentional disorders.
- psychotic disorders such as schizophrenia, positive, negative and/or cognitive symptoms associated with schizophrenia, delusional disorder or substance-induced psychotic disorder, anxiety disorders such as panic disorder, obsessive/compulsive disorders, acute stress disorder or generalized anxiety disorder, drug addictions, movement disorders such as Parkinson's disease or restless leg syndrome, cognition deficiency disorders such as Alzheimer's disease or multi- infarct dementia,
- diabetes and related disorders such as type 2 diabetes mellitus, neurodegenerative disorders such as Alzheimer's disease, Huntington's disease, Parkinson's disease, multiple sclerosis, stroke or spinal cord injury, solid tumors and hematological malignancies such as renal cell carcinoma or breast cancer.
- the invention therefore also relates to pharmaceutical compositions comprising a compound as defined above and a pharmaceutically acceptable carrier and/or adjuvant.
- the invention likewise embraces compounds as described above for use as
- therapeutically active substances especially as therapeutically active substances for the treatment and/or prophylaxis of diseases which are modulated by PDEIOA inhibitors, particularly as therapeutically active substances for the treatment and/or prophylaxis of psychotic disorders, schizophrenia, positive, negative and/or cognitive symptoms associated with schizophrenia, delusional disorder, substance-induced psychotic disorder, anxiety disorders, panic disorder, obsessive/compulsive disorders, acute stress disorder, generalized anxiety disorder, drug addictions, movement disorders, Parkinson's disease, restless leg syndrome, cognition deficiency disorders, Alzheimer's disease, multi-infarct dementia, mood disorders, depression, bipolar disorders, neuropsychiatric conditions, psychosis, attention-deficit/hyperactivity disorder, attentional disorders, diabetes and related disorders, type 2 diabetes mellitus, neurodegenerative disorders, Huntington's disease, multiple sclerosis, stroke, spinal cord injury, solid tumors, hematological malignancies, renal cell carcinoma and breast cancer.
- the invention relates to a method for the therapeutic and
- the invention also embraces the use of compounds as defined above for the therapeutic and/or prophylactic treatment of diseases which are modulated by PDE10A inhibitors, particularly for the therapeutic and/or prophylactic treatment of psychotic disorders,
- schizophrenia positive, negative and/or cognitive symptoms associated with schizophrenia, delusional disorder, substance-induced psychotic disorder, anxiety disorders, panic disorder, obsessive/compulsive disorders, acute stress disorder, generalized anxiety disorder, drug addictions, movement disorders, Parkinson's disease, restless leg syndrome, cognition deficiency disorders, Alzheimer's disease, multi-infarct dementia, mood disorders, depression, bipolar disorders, neuropsychiatric conditions, psychosis, attention-deficit/hyperactivity disorder, attentional disorders, diabetes and related disorders, type 2 diabetes mellitus, neurodegenerative disorders, Huntington's disease, multiple sclerosis, stroke, spinal cord injury, solid tumors, hematological malignancies, renal cell carcinoma and breast cancer.
- the invention also relates to the use of compounds as described above for the preparation of medicaments for the therapeutic and/or prophylactic treatment of diseases which are modulated by PDE10A inhibitors, particularly for the therapeutic and/or prophylactic treatment of psychotic disorders, schizophrenia, positive, negative and/or cognitive symptoms associated with schizophrenia, delusional disorder, substance-induced psychotic disorder, anxiety disorders, panic disorder, obsessive/compulsive disorders, acute stress disorder, generalized anxiety disorder, drug addictions, movement disorders, Parkinson's disease, restless leg syndrome, cognition deficiency disorders, Alzheimer's disease, multi-infarct dementia, mood disorders, depression, bipolar disorders, neuropsychiatric conditions, psychosis, attention- deficit/hyperactivity disorder, attentional disorders, diabetes and related disorders, type 2 diabetes mellitus, neurodegenerative disorders, Huntington's disease, multiple sclerosis, stroke, spinal cord injury, solid tumors, hematological malignancies, renal cell carcinoma and breast cancer.
- Such medicaments comprise a compound as described above.
- Prevention and/or treatment of schizophrenia is a preferred indication. Furthermore, prevention and/or treatment of positive, negative and/or cognitive symptoms associated with schizophrenia is preferred.
- SPA Scintillation Proximity Assay
- PDE10A1 and PDE10A2 are two splice variants of PDE10A. There are these 2 splice variants known, which differ in the N-terminal part of the protein. The catalytic domains of PDE10A1 and PDE10A2 are identical. The assay for PDE10A2 described below is therefore also representative for PDE10A1 and also for PDE10A in general.
- the PDE10A2 assay was performed in a two step procedure in 96-well micro titer plates.
- the reaction mixture of 80 ⁇ contained 20 mM HEPES/10 mM MgCl 2 /0.05 mg/ml buffer (pH 7.5), 50 nM cGMP (Sigma) and 50 nM [ 3 H]-cGMP (GE Healthcare), 0.25 nM PDE10A2 with or without a specific test compound.
- a range of concentrations of the potential inhibitor was used to generate data for calculating the concentration of inhibitor resulting in 50% of the effect (e.g. IC 5 o, the concentration of the competitor inhibiting PDE10A2 activity 50%).
- Non-specific activity was tested without the enzyme.
- the reaction was initiated by addition of the substrate solution (cGMP and [ 3 H]-cGMP) and allowed to progress for 30 minutes at room temperature.
- the reaction was terminated by transferring 50 ⁇ of the reaction mixture into an OptiPlate (Perkin Elmer) containing 25 ⁇ of YSi-SPA scintillation beads (GE Healthcare) in 18 mM zinc sulphate solution (stop reagent). After 1 h under shaking, the plate was centrifuged one minute at 1000 rpm to allow beads to settle. Afterwards, radioactive counts were measured on a Perkin Elmer TopCount Scintillation plate reader.
- GGGGACCACTTTGTACAAGAAAGCTGGGTCAATCTTCAGATGCAGCTG-3' (Seq. ID no. 2) (with AttB2 recombination site in bold) which conferred Gateway recombination sites.
- the PCR product was used in a BP recombination reaction with pDONR221 to generate pENTR Thm-PDE10A2(S449-D789) which was DNA sequence verified and then used in an LR recombination reaction with a Gateway modified version of pETl la.
- the resulting expression vector, placT7.2 H6-(gwl)-Thm-PDE10A2(S449-D789) was DNA sequence confirmed and transformed into E.
- coli strain BL21(DE3) pLysS and recombinant protein was produced in TB medium at 20°C by induction to a final IPTG concentration of 0.5mM at an optical density of 1.0 at 600nm for 20 hours. About 30% of the protein was in the soluble fraction of the cell homogenate.
- the protein was purified using sequential chromatography on Ni-NTA and HiTrapQ/HiTrapS. After thrombin digest at room temperature a HiTrapChelating/HiTrap Benzamindin chromatography removed impurities, uncleaved protein and thrombin.
- the compounds according to formula (I) preferably have an IC 50 value below 10 ⁇ , preferably below 5 ⁇ , more preferably below 1 ⁇ . Preferably, the IC 50 values are above 0.0 InM.
- the following table shows data for some examples.
- the compounds of formula I and/or their pharmaceutically acceptable salts can be used as medicaments, e.g. in the form of pharmaceutical preparations for enteral, parenteral or topical administration. They can be administered, for example, perorally, e.g. in the form of tablets, coated tablets, dragees, hard and soft gelatine capsules, solutions, emulsions or suspensions, rectally, e.g. in the form of suppositories, parenterally, e.g. in the form of injection solutions or suspensions or infusion solutions, or topically, e.g. in the form of ointments, creams or oils. Oral administration is preferred.
- Suitable carrier materials are not only inorganic carrier materials, but also organic carrier materials.
- lactose, corn starch or derivatives thereof, talc, stearic acid or its salts can be used as carrier materials for tablets, coated tablets, dragees and hard gelatine capsules.
- Suitable carrier materials for soft gelatine capsules are, for example, vegetable oils, waxes, fats and semi-solid and liquid polyols (depending on the nature of the active ingredient no carriers might, however, be required in the case of soft gelatine capsules).
- Suitable carrier materials for the production of solutions and syrups are, for example, water, polyols, sucrose, invert sugar and the like.
- Suitable carrier materials for injection solutions are, for example, water, alcohols, polyols, glycerol and vegetable oils.
- Suitable carrier materials for suppositories are, for example, natural or hardened oils, waxes, fats and semi-liquid or liquid polyols.
- Suitable carrier materials for topical preparations are glycerides, semi- synthetic and synthetic glycerides, hydrogenated oils, liquid waxes, liquid paraffins, liquid fatty alcohols, sterols, polyethylene glycols and cellulose derivatives.
- Usual stabilizers preservatives, wetting and emulsifying agents, consistency- improving agents, flavour-improving agents, salts for varying the osmotic pressure, buffer substances, solubilizers, colorants and masking agents and antioxidants come into consideration as pharmaceutical adjuvants.
- the dosage of the compounds of formula I can vary within wide limits depending on the disease to be controlled, the age and the individual condition of the patient and the mode of administration, and will, of course, be fitted to the individual requirements in each particular case. For adult patients a daily dosage of about 0.1 to 2000 mg, especially about 1 to 500 mg, comes into consideration. Depending on severity of the disease and the precise pharmacokinetic profile the compound could be administered with one or several daily dosage units, e.g. in 1 to 3 dosage units.
- the pharmaceutical preparations conveniently contain about 0.1-500 mg, preferably 1- 200 mg, of a compound of formula I.
- Step 1 2-Phenyl-imidazo / 1 ,2-aj 'pyridine-7-carboxylic acid methyl ester
- Step 2 2-Phenyl-imidazo / 1 ,2-aj 'pyridine-7-carboxylic acid
- Step 3 (2-Phenyl-imidazo[l,2-a]pyridin-7-yl)-carbamic acid tert-butyl ester
- diphenylphosphoryl azide (8.16 g, 27 mmol) was added to a solution of 2-phenyl-imidazo[l,2-a]pyridine-7-carboxylic acid (6.36 g, 27 mmol) and
- Step 5 4-Chloro-2-methyl-2H-pyrazole-3-carboxylic acid (2-phenyl-imidazo [ 1 ,2-aj pyridin-7- yl)-amide
- N-N-diisopropylethylamine (749 mg, 6 mmol) and 2-(lH- benzotriazole-l-yl)-l,l,3,3-tetramethyluronium tetrafluoroborate (TBTU, 744 mg, 1.94 mmol) were added to a solution of 4-chloro-2-methyl-2H-pyrazole-3-carboxylic acid (310 mg, 1.94 mmol, Art-Chem B000148) in DMF (5 ml).
- Methylamine (2N in methanol, 2 ml) was added to a solution of l-methyl-5-(2-phenyl- imidazo[l,2-a]pyridin-7-ylcarbamoyl)-lH-pyrazole-4-carboxylic acid ethyl ester (Example 10, 100 mg, 0.26 mmol) in THF (2 ml).
- the light brown suspension was kept for 3 days at r.t..
- methylhydrazine (1.15 g, 25 mmol) and HC1 (36,5% in water, 2.5 ml) were added to a solution of 2-dimethylaminomethylene-3-oxo-succinic acid diethyl ester (6.07 g, 25 mmol, obtained by the method of Hanzlowsky et al, J. Heterocyclic Chem. 2003, 40(3), 487-498) in ethanol (200 ml).
- the mixture was heated to 60 °C until HPLC analysis indicated the disappearance of the starting material (2 h).
- the solvent was evaporated, and the residue was taken up in dichloromethane and washed (water).
- Step 3 l-Methyl-5-(2-phenyl midazo[l,2-a]pyridin-7-ylcarbam
- Step I 2H-Pyrazole-3 ,4-dicarboxylic acid diethyl ester
- hydrazine monohydrate hydrochloride (1.91 g, 28 mmol) and HC1 (36,5% in water, 2.8 ml) were added to a solution of 2-dimethylaminomethylene-3-oxo- succinic acid diethyl ester (6.8 g, 28 mmol, obtained by the method of Hanzlowsky et al, J. Heterocyclic Chem. 2003, 40(3), 487-498) in ethanol (100 ml).
- the mixture was heated to 60 °C (3 h). The solvent was evaporated, and the residue was taken up in dichloromethane and washed (water).
- Step 4 I -Ethyl- 5 -(2-phenyl-imidazo [ 1 ,2-aj pyridin-7-ylcarbamoyl)- lH-pyrazole-4-carboxylic acid ethyl ester
- Step 1 l-Methyl-5-(2-phenyl-imidazo / 1 ,2-aj 'pyridin-7-ylcarbamoyl)- lH-pyrazole-4-carboxylic acid
- Step 1 7-Amino-2-phenyl-imidazof l,2-a]pyridine-6-carbonitrile
- Step 2 5-Chlorocarbonyl-l -methyl- lH-pyrazole-4-carboxylic acid ethyl ester
- Step 3 5-(6-Cyano-2-phenyl-imidazo / 1 ,2-aj 'pyridin-7-ylcarbamoyl)- 1 -methyl- lH-pyrazole-4- carboxylic acid ethyl ester
- Step 1 l-Ethyl-5-(2-phenyl-imidazo / 1 ,2-a] 'pyridin-7-ylcarbamoyl)- lH-pyrazole-4-carboxylic acid
- Step 2 4-(Azetidine-l-carbonyl)-2-ethyl-2H-pyrazole-3-carboxylic acid ⁇ 2-phenyl-imidazofl ,2- ajpyridin- 7-yl)-amide
- TBTU (82 mg) and diisopropylamine (83 mg) were added to a solution of l-ethyl-5-(2-phenyl- imidazo[l,2-a]pyridin-7-ylcarbamoyl)-lH-pyrazole-4-carboxylic acid (80 mg, 0.21 mmol) in DMF (1 ml). After stirring this mixture for 30 min (r.t.), azetidine (37 mg, 0.65 mmol) was added to the light brown solution. The mixture was stirred at r.t.
- Step 1 5-Morpholin-4-yl-2-phenyl-imidazo[ 1,2-cJpyrimidin- 7-ylamine
- N-N-diisopropylethylamine 121 mg
- 2-(lH- benzotriazole-l-yl)-l,l,3,3-tetramethyluronium tetrafluoroborate TBTU, 120 mg
- 4-chloro-2-methyl-2H-pyrazole-3-carboxylic acid 50 mg, 0.31 mmol, Art-Chem B000148
- DMF 3 ml
- 5-morpholin-4-yl-2-phenyl-imidazo[l,2-c]pyrimidin-7- ylamine 110 mg, 0.37 mmol
- Step 3 (6-Bromo-2-phenyl-imidazo[l ,2-aJpyridin- ' / 7 -yl)-carbamic acid tert-butyl ester
- diphenylphosphoryl azide (8.20 g, 29 mmol) was added to a solution of 6-bromo-2-phenyl-imidazo[l,2-a]pyridine-7-carboxylic acid (9.16 g, 29 mmol) and triethylamine (5.8 g, 58 mmol) in tert-butanol (86 ml). The mixture was heated to reflux overnight, then cooled and diluted with ethyl acetate. The mixture was washed (NH 4 C1 satd.), and dried (Na 2 S0 4 ).
- Trifluoro acetic acid (15 ml) was added to a solution of (6-bromo-2-phenyl-imidazo[l,2- a]pyridin-7-yl)-carbamic acid tert-butyl ester (2.75 g, 7.1 mmol) in CH 2 C1 2 (15 ml), and the mixture was stirred at r.t. overnight. The mixture was then washed (water, 2x50 ml), dried (Na 2 S0 4 ), and the solvent was evaporated to give a first crop of the desired product. The water layer was made alkaline by addition of NaOH (cone. 14 ml), and extracted with dichloro methane.
- Step 5 5-(6-Bromo-2-phenyl midazo[l,2-a]pyridin-7-ylcarbamoy
- Step 7 4-(Azetidine-l-carbonyl)-2-methyl-2H-pyrazole-3-carboxylic acid (6-bromo-2-phenyl- imidazo[l,2-a]pyridin-7-yl)-amide
- Step 1 7-Amino-2-phenyl-imidazo[ l,2-a]pyridine-6-carbonitrile 2-Bromoacetophenone (1.11 g, 5.6 mmol) and NaHC0 3 (470 mg) were added to a solution of 3- cyano-4,6-diaminopyridine (500 mg, 3.7 mmol) in methanol (7.5 ml), and the mixture was heated to reflux overnight. Upon cooling, water (4 ml) was added and the precipitate was filtered and dried under vacuum to give a first crop of the desired product. The filtrate was evaporated, the residue was taken up in ethyl acetate (20 ml) and washed (water, brine).
- Step 1 6-Chloro-2-phenyl-imidazo / 1 ,2-aj 'pyridin-7-ylamine
- Step 1 2-Phenyl-5-piperidin-l-yl-imidazo[ 1,2-cJpyrimidin- 7-ylamine
- Step 1 l-Methyl-5-(5-morpholin-4-yl-2-phenyl-imidazo / 1 ,2-cj 'pyrimidin-7-ylcarbamoyl)-lH- pyrazole-4-carboxylic acid
- X-Zyme 6134 (20%, 90 mg) was added to a suspension of 2-methyl-2H-pyrazole-3,4- dicarboxylic acid diethyl ester (as prepared in Example 10, Step 1, 4.5 g, 19.5 mmol) in KPI (100 mM, pH 7.2, 450 ml).
- KPI 100 mM, pH 7.2, 450 ml
- Sodium hydroxide solution (1 M, total amount 23.2 ml) was added slowly as needed to keep the pH constantly at 7.2 over the course of the reaction.
- the reaction mixture was extracted with tert-butyl methyl ether (TBME) to remove unwanted byproducts.
- the water layer was then acidified (pH 3.9) by addition of H 2 SO 4 , and extracted several times with TBME.
- the pH of the water layer was adjusted by addition of H 2 SO 4 to a pH range between 4.2 and 3.8. After drying (Na 2 SC"4) and evaporating the combined organic layers, a first crop of title compound (2.90 g, 74%) was obtained as a light grey solid. An additional crop of title compound (0.21 g, 5.3%) was obtained by adding brine to the water layer, repeated extraction with TBME, drying (Na 2 SC"4) of the combined organic layers, and evaporation.
- Step 2 4-(Azetidine-l-carbonyl)-2-methyl-2H-pyrazole-3-carboxylic acid ethyl ester
- Step 3 4-(Azetidine-l-carbonyl)-2-methyl-2H-pyrazole-3-carboxylic acid
- Step 4 (6-Cyclopropyl-2-phenyl-imidazo[l ,2-aJpyridin- ' / 7 -yl)-carbamic acid tert-butyl ester (6-Bromo-2-phenyl-imidazo[l,2-a]pyridin-7-yl)-carbamic acid tert-butyl ester (Example 67, Step 1 - 3, 600 mg, 1.54 mmol), cyclopropylboronic acid (265 mg, 3.12 mmol), potassium phosphate (1.64 g), tricyclohexylphosphine (95 mg), and palladium(II) acetate (38 mg) were placed in a round-bottom flask, and the flask was filled with an atmosphere of Argon. Toluene (15 ml) and water (1 ml) were added and the mixture was heated to 100 °C overnight. Upon cooling, the reaction mixture was taken up in ethyl acetate and was
- Step 6 4-(Azetidine-l-carbonyl)-2-methyl-2H-pyrazole-3-carboxylic acid (6-cyclopropyl-2- phenyl-imidazofl,2-aJpyridin-7-yl)-amide
- Propylphosphonic anhydride solution (50%> in ethyl acetate, 0.59 ml) was added to a cooled (0 °C) solution of 6-cyclopropyl-2-phenyl-imidazo[l,2-a]pyridin-7-ylamine (100 mg, 0.40 mmol), 4-(azetidine-l-carbonyl)-2-methyl-2H-pyrazole-3-carboxylic acid (Step 3, 167 mg, 0.51 mmol), and N,N-diisopropylethylamine (311 mg) in ethyl acetate (3 ml). The mixture was stirred for 30 min at 0 °C and overnight at r.t.
- Step 2 4-Chloro-2-methyl-2H-pyrazole-3-carboxylic acid (2-phenyl-imidazo[l,2-c]pyrimidin-7- yl)-amide
- Step 1 l-Methyl-5-(2-phenyl-imidazo / 1 ,2-cj 'pyrimidin-7-ylcarbamoyl)-lH-pyrazole-4- carboxylic acid
- Step 2 2-Methyl-2H-pyrazole-3,4-dicarboxylic acid 4-[(3-methoxy-propyl)-amide] 3-[(2-phenyl- imidazo [ 1 ,2-cj ' pyrimidin-7-yl) -amide]
- 3-methoxy-propylamine (21 mg, 0.236 mmol) was added to a mixture of 1- methyl-5 -(2 -phenyl- imidazo [l,2-c]pyrimidin-7-ylcarbamoyl)-lH-pyrazole-4-carboxylic acid (70 mg, 0.193 mmol), TBTU (74 mg, 0.231 mmol), diisopropylamine (75 mg, 0.581 mmol) and DMF (2 ml), and the mixture was shaken at r.t. overnight.
- Film coated tablets containing the following ingredients can be manufactured in a conventional manner:
- the active ingredient is sieved and mixed with micro cristalline cellulose and the mixture is granulated with a solution of polyvinylpyrrolidon in water.
- the granulate is mixed with sodium starch glycolate and magesiumstearate and compressed to yield kernels of 120 or 350 mg respectively.
- the kernels are lacquered with an aqueous solution / suspension of the above mentioned film coat.
- Capsules containing the following ingredients can be manufactured in a conventional manner:
- the components are sieved and mixed and filled into capsules of size 2.
- Injection solutions can have the following composition:
- the active ingredient is dissolved in a mixture of Polyethylene Glycol 400 and water for injection (part).
- the pH is adjusted to 5.0 by Acetic Acid.
- the volume is adjusted to 1.0 mL by addition of the residual amount of water.
- the solution is filtered, filled into vials using an appropriate overage and sterilized.
- Soft gelatin capsules containing the following ingredients can be manufactured in a conventional manner:
- Soya bean oil HO.O mg
- the active ingredient is dissolved in a warm melting of the other ingredients and the mixture is filled into soft gelatin capsules of appropriate size.
- the filled soft gelatin capsules treated according to the usual procedures.
- Sachets containing the following ingredients can be manufactured in a conventional manner:
- Microcristalline cellulose (AVICEL PH 102) 1400.0 mg
- Flavoring additives 1.0 mg The active ingredient is mixed with lactose, microcristalline cellulose and sodium carboxymethyl cellulose and granulated with a mixture of po lyvinylpyrro lidon in water. The granulate is mixed with magnesiumstearate and the flavouring additives and filled into sachets.
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- Diabetes (AREA)
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Abstract
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Priority Applications (15)
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JP2012530234A JP5629322B2 (en) | 2009-09-24 | 2010-09-21 | Imidazopyridine or imidazopyrimidine derivatives as phosphodiesterase 10A inhibitors |
CA2770087A CA2770087C (en) | 2009-09-24 | 2010-09-21 | Imidazopyridine or imidazopyrimidine derivatives as phosphodiesterase 1oa inhibitors |
PL10760968T PL2480546T3 (en) | 2009-09-24 | 2010-09-21 | Imidazopyridine or imidazopyrimidine derivatives as phosphodiesterase 10A inhibitors |
SI201030869T SI2480546T1 (en) | 2009-09-24 | 2010-09-21 | Imidazopyridine or imidazopyrimidine derivatives as phosphodiesterase 10A inhibitors |
RU2012113128/04A RU2502737C2 (en) | 2009-09-24 | 2010-09-21 | Imidazopyridine or imidazopyrimidine derivatives as phosphodiesterase 10a inhibitors |
BR112012006531A BR112012006531A2 (en) | 2009-09-24 | 2010-09-21 | imidazopyrimidine or imidazopyridine derivatives as phosphodiesterase inhibitors 10a. |
KR1020127010422A KR101426624B1 (en) | 2009-09-24 | 2010-09-21 | Imidazopyridine or imidazopyrimidine derivatives as phosphodiesterase 10a inhibitors |
CN201080042292.5A CN102548991B (en) | 2009-09-24 | 2010-09-21 | Imidazopyridine or imidazopyrimidine derivatives as phosphodiesterase 10A inhibitors |
MX2012003469A MX2012003469A (en) | 2009-09-24 | 2010-09-21 | Imidazopyridine or imidazopyrimidine derivatives as phosphodiesterase 10a inhibitors. |
DK10760968.7T DK2480546T3 (en) | 2009-09-24 | 2010-09-21 | Imidazopyridine or imidazopyrimidinderivater as phosphodiesterase inhibitors 10A |
AU2010299927A AU2010299927B2 (en) | 2009-09-24 | 2010-09-21 | Imidazopyridine or imidazopyrimidine derivatives as phosphodiesterase 10A inhibitors |
ES10760968T ES2530884T3 (en) | 2009-09-24 | 2010-09-21 | Imidazopyridine or imidazopyrimidine derivatives as phosphodiesterase 10A inhibitors |
EP10760968.7A EP2480546B1 (en) | 2009-09-24 | 2010-09-21 | Imidazopyridine or imidazopyrimidine derivatives as phosphodiesterase 10A inhibitors |
IL218032A IL218032A (en) | 2009-09-24 | 2012-02-09 | Imidazopyridine or imidazopyrimidine derivatives as phosphodiesterase 10a inhibitors |
HRP20150345TT HRP20150345T1 (en) | 2009-09-24 | 2015-03-27 | Imidazopyridine or imidazopyrimidine derivatives as phosphodiesterase 10a inhibitors |
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EP09171253.9 | 2009-09-24 | ||
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EP (1) | EP2480546B1 (en) |
JP (1) | JP5629322B2 (en) |
KR (1) | KR101426624B1 (en) |
CN (1) | CN102548991B (en) |
AR (1) | AR078437A1 (en) |
BR (1) | BR112012006531A2 (en) |
CA (1) | CA2770087C (en) |
CL (1) | CL2012000708A1 (en) |
CY (1) | CY1116120T1 (en) |
DK (1) | DK2480546T3 (en) |
ES (1) | ES2530884T3 (en) |
HR (1) | HRP20150345T1 (en) |
IL (1) | IL218032A (en) |
MX (1) | MX2012003469A (en) |
PE (1) | PE20121438A1 (en) |
PL (1) | PL2480546T3 (en) |
PT (1) | PT2480546E (en) |
RU (1) | RU2502737C2 (en) |
SI (1) | SI2480546T1 (en) |
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WO (1) | WO2011036127A1 (en) |
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WO2014118039A1 (en) * | 2013-01-31 | 2014-08-07 | F. Hoffmann-La Roche Ag | Radiolabeled compounds |
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JP2014526533A (en) * | 2011-09-19 | 2014-10-06 | エフ.ホフマン−ラ ロシュ アーゲー | Triazolopyridine compounds as PDE10A inhibitors |
WO2014177493A1 (en) * | 2013-04-30 | 2014-11-06 | F. Hoffmann-La Roche Ag | Pd-CATALYZED COUPLING OF PYRAZOLE AMIDES |
WO2015044095A1 (en) * | 2013-09-26 | 2015-04-02 | F. Hoffmann-La Roche Ag | Imidazo[1,2-a]pyridin-7-amines as imaging tools |
US9200016B2 (en) | 2013-12-05 | 2015-12-01 | Allergan, Inc. | Substituted 6, 7-dialkoxy-3-isoquinoline derivatives as inhibitors of phosphodiesterase 10 (PDE 10A) |
CN105164125A (en) * | 2013-04-29 | 2015-12-16 | 豪夫迈·罗氏有限公司 | 2-phenyl or 2-hetaryl imidazol[1,2-a]pyridine derivatives |
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EP2671582B1 (en) * | 2011-02-01 | 2016-07-13 | Kyowa Hakko Kirin Co., Ltd. | Ring-fused heterocyclic derivative |
WO2015006689A1 (en) | 2013-07-12 | 2015-01-15 | University Of South Alabama | Treatment and diagnosis of cancer and precancerous conditions using pde10a inhibitors and methods to measure pde10a expression |
IL292968A (en) | 2016-09-02 | 2022-07-01 | Cyclerion Therapeutics Inc | Fused bicyclic scg stimulators |
CN113698406A (en) * | 2021-08-30 | 2021-11-26 | 成都药明康德新药开发有限公司 | Synthesis method of 6-methylpyrazolo [1,5-A ] pyrimidine-3-amine |
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- 2010-09-21 MX MX2012003469A patent/MX2012003469A/en active IP Right Grant
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- 2010-09-21 JP JP2012530234A patent/JP5629322B2/en not_active Expired - Fee Related
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- 2010-09-21 PE PE2012000365A patent/PE20121438A1/en not_active Application Discontinuation
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Also Published As
Publication number | Publication date |
---|---|
CA2770087A1 (en) | 2011-03-31 |
CA2770087C (en) | 2014-09-09 |
ES2530884T3 (en) | 2015-03-06 |
KR101426624B1 (en) | 2014-08-05 |
PT2480546E (en) | 2015-02-09 |
JP5629322B2 (en) | 2014-11-19 |
CN102548991A (en) | 2012-07-04 |
HRP20150345T1 (en) | 2015-05-08 |
TWI402268B (en) | 2013-07-21 |
CN102548991B (en) | 2015-03-25 |
US20110071128A1 (en) | 2011-03-24 |
IL218032A0 (en) | 2012-04-30 |
AU2010299927A1 (en) | 2012-03-15 |
EP2480546B1 (en) | 2014-12-31 |
MX2012003469A (en) | 2012-04-19 |
SI2480546T1 (en) | 2015-03-31 |
US8263584B2 (en) | 2012-09-11 |
PE20121438A1 (en) | 2012-10-26 |
BR112012006531A2 (en) | 2016-11-22 |
CL2012000708A1 (en) | 2012-09-07 |
IL218032A (en) | 2014-06-30 |
AR078437A1 (en) | 2011-11-09 |
PL2480546T3 (en) | 2015-05-29 |
RU2012113128A (en) | 2013-11-10 |
EP2480546A1 (en) | 2012-08-01 |
CY1116120T1 (en) | 2017-02-08 |
US20110294779A1 (en) | 2011-12-01 |
KR20120068943A (en) | 2012-06-27 |
TW201116530A (en) | 2011-05-16 |
US8017604B2 (en) | 2011-09-13 |
RU2502737C2 (en) | 2013-12-27 |
JP2013505911A (en) | 2013-02-21 |
DK2480546T3 (en) | 2015-02-02 |
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