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Definitions

• the invention relates to compounds which are inhibitors of the family of p38 mitogen-activated protein kinase enzymes (referred to herein as p38 MAP kinase inhibitors), for example the alpha and gamma sub-types thereof, and of Syk kinase and the Src family of tyrosine kinases, and to their use in therapy, including in pharmaceutical combinations, especially in the treatment of inflammatory diseases, in particular inflammatory diseases of the lung, such as asthma and COPD, as well as those of the gastrointestinal tract, such as ulcerative colitis and Crohn's disease, and of the eye, such as uveitis.
• inflammatory diseases in particular inflammatory diseases of the lung, such as asthma and COPD
• those of the gastrointestinal tract such as ulcerative colitis and Crohn's disease
• eye such as uveitis.
• p38 MAPK isoforms (alpha, beta, gamma and delta respectively), each displaying different patterns of tissue expression, have been identified.
• the p38 MAPK alpha and beta isoforms are found ubiquitously in the body, being present in many different cell types.
• the alpha isoform is well characterized in terms of its role in inflammation.
• studies using a chemical genetic approach in mice indicate that the p38 MAPK beta isoform does not play a role in inflammation (O'Keefe, S. J. et al., J Biol Chem., 2007, 282(48):34663-71), it may be involved in pain mechanisms through the regulation of COX2 expression (Fitzsimmons, B. L.
• the p38 MAPK-delta isoform is expressed more highly in the pancreas, testes, lung, small intestine and the kidney. It is also abundant in macrophages and detectable in neutrophils, CD4+ T cells and in endothelial cells (Shmueli, O. et al., Comptes Rendus Biologies, 2003, 326(10-11):1067-1072; Smith, S. J. Br. J. Pharmacol., 2006, 149:393-404; Hale, K. K., J.
• BIRB 796 selective small molecule inhibitors of p38 MAPK gamma and p38 MAPK delta are not currently available, although one previously disclosed compound, BIRB 796, is known to possess pan-isoform inhibitory activity. The inhibition of p38 MAPK gamma and delta isoforms is observed at higher concentrations of the compound than those required to inhibit p38 MAPK alpha and p38 beta (Kuma, Y. J. Biol. Chem., 2005, 280:19472-19479). In addition BIRB 796 also impaired the phosphorylation of p38 MAPKs or JNKs by the upstream kinase MKK6 or MKK4.
• Kuma discussed the possibility that the conformational change caused by the binding of the inhibitor to the MAPK protein may affect the structure of both its phosphorylation site and the docking site for the upstream activator, thereby impairing the phosphorylation of p38 MAPKs or JNKs.
• p38 MAP kinase is believed to play a pivotal role in many of the signalling pathways that are involved in initiating and maintaining chronic, persistent inflammation in human disease, for example, in severe asthma, COPD (Chung, F., Chest, 2011, 139(6):1470-1479) and inflammatory bowel disease (IBD).
• COPD Chronic pulmonary disease
• IBD inflammatory bowel disease
• p38 MAP kinase is activated by a range of pro-inflammatory cytokines and that its activation results in the recruitment and release of additional pro-inflammatory cytokines.
• data from some clinical studies demonstrate beneficial changes in disease activity in patients during treatment with p38 MAP kinase inhibitors. For instance Smith describes the inhibitory effect of p38 MAP kinase inhibitors on TNF ⁇ (but not IL-8) release from human PBMCs.
• COPD is a condition in which the underlying inflammation is reported to be substantially resistant to the anti-inflammatory effects of inhaled corticosteroids. Consequently, a superior strategy for treating COPD would be to develop an intervention which has both inherent anti-inflammatory effects and the ability to increase the sensitivity of the lung tissues of COPD patients to inhaled corticosteroids.
• a recent publication of Mercado Mercado (Mercado, N., et al., Mol. Pharmacol., 2011, 80(6):1128-1135) demonstrates that silencing p38 MAPK gamma has the potential to restore sensitivity to corticosteroids. Consequently there may be a dual benefit for patients in the use of a p38 MAP kinase inhibitor for the treatment of COPD and severe asthma.
• respiratory viral infections including rhinovirus
• respiratory viral infections represent an independent risk factor that correlates negatively with the 12 month survival rate in paediatric, lung transplant recipients (Liu, M., Worley, S., et al., Transpl. Infect. Dis., 2009, 11(4):304-312).
• High risk groups for whom a rhinovirus infection in the upper respiratory tract can lead to severe secondary complications, are not limited to patients with chronic respiratory disease. They include, for example, the immune compromised who are prone to lower respiratory tract infection, as well as patients undergoing chemotherapy, who face acute, life-threatening fever. It has also been suggested that other chronic diseases, such as diabetes, are associated with a compromised immuno-defence response. This increases both the likelihood of acquiring a respiratory tract infection and of being hospitalised as a result (Peleg, A. Y., Weerarathna, T., et al., Diabetes Metab. Res. Rev., 2007, 23(1):3-13; Kornum, J. B., Reimar, W., et al., Diabetes Care, 2008, 31(8):1541-1545).
• Viral entry into the host cell is associated with the activation of a number of intracellular signalling pathways controlled by the relative activation and inactivation of specific kinases which are believed to play a prominent role in the initiation of inflammatory processes (reviewed by Ludwig, S, 2007; Signal Transduction, 7:81-88) and of viral propagation and subsequent release.
• Certain p38 MAPK inhibitors have also been described as inhibitors of the replication of respiratory syncytial virus (Cass, L. et al., WO 2011/158039).
• IBD The precise etiology of IBD is uncertain, but is believed to be governed by genetic and environmental factors that interact to promote an excessive and poorly controlled mucosal inflammatory response directed against components of the luminal microflora. This response is mediated through infiltration of inflammatory neutrophils, dendritic cells and T-cells from the periphery. Due to the ubiquitous expression of p38 in inflammatory cells it has become an obvious target for investigation in IBD models. Studies investigating the efficacy of p38 inhibitors in animal models of IBD and human biopsies from IBD patients indicated that p38 could be a target for the treatment of IBD (Hove, T. ten et al., Gut, 2002, 50:507-512, Docena, G.
• T cells are known to play key role in mediating inflammation of the gastrointestinal tract.
• SCID immunodeficient
• mucosal membranes from IBD patients showed an upregulation of CD4+ cells which were either Th1 (IFN ⁇ /IL-2) or Th2 (IL5/TGF ⁇ ) biased depending on whether the patient had Crohn's disease or ulcerative colitis (Fuss I J. et al. J. Immunol. 1996 157:1261-70.).
• T cells are known to play a key role in inflammatory disorders of the eye with several studies reporting increased levels of T cell associated cytokines (IL-17 and IL-23) in sera of Behcets patients (Chi W. et al. Invest Ophthalmol V is Sci. 2008 49:3058-64). In support, Direskeneli and colleagues demonstrated that Behcets patients have increased Th17 cells and decreased Treg cells in their peripheral blood (Direskeneli H. et al. J Allergy Clin Immunol. 2011 128:665-6).
• Src family kinases are known to play a key role in this pathway, where Src family kinases, Fyn and Lck, are the first signalling molecules to be activated downstream of the T cell receptor (Barber E K. et al. PNAS 1989 86:3277-81). They initiate the tyrosine phosphorylation of the T cell receptor leading to the recruitment of the Syk family kinase, ZAP-70. Animal studies have shown that ZAP-70 knockout results in a SCID phenotype (Chan A C. et al. Science. 1994 10; 264(5165):1599-601).
• Syk kinase is widely expressed in cells of the hematopoietic system, most notably in B cells and mature T cells. Through interaction with immunoreceptor tyrosine-based activation (ITAM) motifs it plays an important role in regulating T cell and B cell expansion as well as mediating immune-receptor signalling in inflammatory cells.
• ITAM immunoreceptor tyrosine-based activation
• IL-6 and MMP release inflammatory mediators commonly found upregulated in inflammatory disorders including IBD and rheumatoid arthritis (Wang Y D. et al World J Gastroenterol 2007; 13: 5926-5932, Litinsky I et al. Cytokine. 2006 January 33:106-10).
• kinase enzymes are now also recognised to regulate the activity of a range of cellular functions. Among those which have been discussed recently are the maintenance of DNA integrity (Shilo, Y. Nature Reviews Cancer, 2003, 3:155-168) and co-ordination of the complex processes of cell division. An illustration of recent findings is a publication describing the impact of a set of inhibitors acting upon the so-called “Olaharsky kinases” on the frequency of micronucleus formation in vitro (Olaharsky, A. J. et al., PLoS Comput. Biol., 2009, 5(7):e1000446.).
• Micronucleus formation is implicated in, or associated with, disruption of mitotic processes and is therefore an undesirable manifestation of potential toxicity.
• Inhibition of glycogen synthase kinase 3 ⁇ (GSK3 ⁇ ) was found to be a particularly significant factor that increases the likelihood of a kinase inhibitor promoting micronucleus formation.
• Recently, inhibition of the kinase GSK3 ⁇ with RNAi was also reported to promote micronucleus formation (Tighe, A. et al., BMC Cell Biology, 2007, 8:34).
• Desirable compounds are those that exhibit a superior therapeutic index by exerting, at the least, an equally efficacious effect as previous agents but, in one or more respects, are less toxic at the relevant therapeutic dose.
• the present invention therefore, inter alia, provides such novel compounds that inhibit the enzyme activity of p38 MAP kinase, for example with certain sub-type specificities, optionally together with Syk kinase and tyrosine kinases within the Src family (particularly c-Src) thereby possessing good anti-inflammatory properties, and suitable for use in therapy.
• the compounds exhibit a long duration of action and/or persistence of action in comparison to other previously disclosed allosteric p38 MAP kinase inhibitors such as, for example, BIRB796 (Pargellis, C. et al., Nature Struct. Biol., 2002, 9(4):268-272).
• the invention provides a compound of formula (I),
• Q represents thienyl, phenyl or pyridinyl, either of which may optionally bear 1 to 3 substituents independently selected from, hydroxyl, halogen, C 1-6 alkyl, C 1-6 alkoxy, C 1-6 haloalkoxy, C 1-6 hydroxyalkyl, NH 2 , N(H)—C 1-6 alkyl, N(C 1-6 alkyl) 2 , C 1-6 alkylene-5-10 membered heterocycle and C 0-3 alkylene-O—C 0-6 alkylene-5-10 membered heterocycle;
• X represents CH or N
• Y represents NR 2 R 3 , or a 4-10 heterocycle optionally linked through a heteroatom, wherein said heterocycle bears 0 or 1 substituents selected from halo, OH, C 1-6 alkyl, C 1-4 haloalkyl, C 0-3 alkylene-O—C 0-6 alkyl, C 0-3 alkylene-O—C 1-3
• Compounds of the invention are inhibitors of p38 MAP kinase especially of the alpha sub-type.
• compounds of the present invention have low B-Raf binding, for example less than 40% inhibition of the kinase binding at 500 nM, such as 30% inhibition or less in an assay such as the Kinomescan method.
• B-Raf is a member of the Raf kinase family of serine/threonine-specific protein kinases. This protein plays a role in regulating the MAP kinase/ERKs signalling pathway, which affects cell division, differentiation, and secretion. A mutation of the gene has been associated with cancer in humans (Davies, H. et al., Nature, 2002, 417(6892):949-54).
• kinase inhibitors intended for use as anti-inflammatory medicines should have minimal potential to interact with B-Raf.
• the present compounds also display low affinity for GSK3 ⁇ kinase in binding assays, which is considered to be beneficial in a therapeutic context, in particular in relation to minimising toxicity in vivo.
• compounds of the present invention have p59-HCK inhibitory activity which may also augment their advantageous therapeutic profile.
• Alkyl as used herein refers to straight chain or branched chain alkyl, such as, without limitation, methyl, ethyl, n-propyl, iso-propyl, butyl, n-butyl and tert-butyl. In one embodiment alkyl refers to straight chain alkyl.
• the alkoxy is linked through oxygen to the remainder of the molecule, for example —OC 1-6 alkyl. In one embodiment the disclosure relates to straight chain alkoxy. In one embodiment the alkoxy is linked through oxygen to the remainder of the molecule but the alkoxy group contains a further oxygen atom, for example —OCH 2 CH 2 OCH 3.
• Halo or halogen includes fluoro, chloro, bromo or iodo, in particular fluoro, chloro or bromo, especially fluoro or chloro.
• Alkyl substituted by halo (haloalkyl) as employed herein refers to alkyl groups having 1 to 6 halogen atoms, for example 1 to 5 halogens, such as per haloalkyl, in particular perfluoroalkyl, more specifically —CF 2 CF 3 or CF 3 .
• Alkyl substituted by hydroxy (hydroxyalkyl) as employed herein refers to alkyl groups having 1 to 3 hydroxy groups, for example 1 or 2 hydroxy substituents thereon, for example —CH 2 CH 2 OH, —C(CH 3 )CH 2 OH, —C(CH 3 ) 2 CH 2 OH or similar.
• Alkoxy substituted by halo (haloalkoxy) as employed herein refers to alkoxy groups having 1 to 6 halogen atoms, for example 1 to 5 halogens, such as per haloalkoxy, in particular perfluoroalkoxy, more specifically —OCF 2 CF 3 or —OCF 3 .
• alkylene as employed herein is a straight chain or branched chain carbon linking group, for example comprising methylenes, between two other moieties. It will be clear to those skilled in the art that groups defined as, for example C 2-8 alkenyl and C 2-8 alkynyl may comprise an alkylene portion. For the avoidance of doubt, the term “n-alkylene”, when used herein, refers to straight chain alkylene.
• the heteroatom may replace a primary, secondary or tertiary carbon, that is a CH 3 , —CH 2 — or a —CH—, group, as technically appropriate and hydrogen or branching in the alkyl or alkylene chain will fill the valency of the heteroatom as appropriate to the location, for example where a terminal primary carbon is replaced by an oxygen heteroatom the terminal group will be an alcohol.
• C 1-6 alkyl includes C 1 , C 2 , C 3 , C 4 , C 5 and C 6 .
• C 1-6 alkoxy includes C 1 , C 2 , C 3 , C 4 , C 5 and C 6 .
• 5-10 membered heterocycle refers to a 5 to 10 membered saturated or partially unsaturated non-aromatic ring comprising one or more, for example 1, 2, 3 or 4 heteroatoms independently selected from O, N and S, wherein optionally one or two carbons in the ring may bear an oxo substituent.
• Any valencies of a heteroatom not employed in forming or retaining the ring structure may be filled by hydrogen or a substituent, as appropriate.
• the optional substituents on the heterocycles may be attached to a carbon or on a heteroatom, such as nitrogen as appropriate.
• Examples of 5-10 membered heterocycles include, pyrroline, pyrrolidine, tetrahydrofuran, thiepane, oxepane piperidine, piperazine, morpholine, thiomorpholine, dioxane, tetrahydrothiophene, pyrazoline, imidazoline, pyrazolidine, oxoimidazolidine, dioxolane, thiazolidine, isoxazolidine, dihydropyran, dihydroindene, dihydroisobenzofuran, isoindolin-1-one, chroman, 1,2,3,4-tetrahydroquinoline, 2,3-dihydrobenzo[b][1,4]dioxineazocane, and the like.
• 5-6 membered heterocycle refers to a 5 to 6 membered saturated or partially unsaturated non-aromatic ring comprising one or more, for example 1, 2, 3 or 4 heteroatoms independently selected from O, N and S wherein optionally one or two carbons in the ring may bear an oxo substituent.
• the definition of C 5-6 heterocycle as employed herein refers to a 5 to 6 membered saturated or partially unsaturated non-aromatic carbocyclic ring comprising one or more, for example 1, 2, 3 or 4 heteroatoms independently selected from O, N and S, wherein each heteroatom replaces a carbon atom and optionally one or two carbons may bear an oxo substituent.
• any valencies of a heteroatom not employed in forming or retaining the ring structure may be filled by hydrogen or a substituent, as appropriate.
• substituents on heterocycles may be on carbon or on a heteroatom, such as N as appropriate.
• Examples of heterocycles and C 5-6 heterocycles include pyrroline, pyrrolidine, tetrahydrofuran, tetrahydrothiophene, pyrazoline, imidazoline, pyrazolidine, imidazolidine, oxoimidazolidine, dioxolane, thiazolidine, isoxazolidine, pyran, dihydropyran, piperidine, piperazine, morpholine, dioxane, thiomorpholine and oxathiane.
• the group morpholinyl suitably represents N-morpholinyl.
• R, R a , R b , R 1 , Q and Y are defined as above for compounds of formula (I).
• R, R a , R b , R 1 , Q and Y are defined above for compounds of formula (I).
• R, R a , R b , R 1 , Q and Y are defined above for compounds of formula (I).
• R, R a , R b , R 1 , Q and Y are defined above for compounds of formula (I).
• R, R a , R b , R 1 , Q and Y are defined above for compounds of formula (I).
• R, R a , R b , R 1 , X, Q and Y are as defined above for compounds of formula (I).
• R, R a , R b , R 1 , X, Q and Y are as defined above for compounds of formula (I).
• R 2 and R 3 are independently selected from H, C 1-8 alkyl, wherein independently each alkyl or alkylene group optionally bears 1 oxo substituent, and optionally up to two carbon atoms in the alkyl or alkylene chain may be replaced by a heteroatom selected from O, N or S(O) p , such that when alkyl or alkylene comprises an amine said amino group is a tertiary amine.
• Q represents phenyl bearing one or two substituents independently selected from hydroxyl, halogen, C 1-6 alkyl, C 1-6 alkoxy, C 1-6 haloalkoxy, C 1-6 hydroxyalkyl, N(C 1-6 alkyl) 2 , C 1-6 alkylene-5-10 membered heterocycle and C 0-3 alkylene-O—C 1-6 alkylene-5-10 membered heterocycle (e.g.
• substituents independently selected from hydroxyl, halogen, C 1-6 alkyl, C 1-6 alkoxy, C 1-6 haloalkoxy, C 1-6 hydroxyalkyl, C 1-6 alkylene-5-10 membered heterocycle and C 0-3 alkylene-O—C 1-6 alkylene-5-10 membered heterocycle).
• Q represents phenyl bearing a methyl, methoxy, —N(CH 3 ) 2 or —OCH 2 CH 2 OCH 3 (e.g. methyl, methoxy, or —OCH 2 CH 2 OCH 3 ), for example one of said substituents, in particular in the para position.
• Q is dimethyl phenyl, for example where the methyl substituents are in the meta and para position.
• Q represents pyridinyl bearing one substituent independently selected from hydroxyl, halogen, C 1-6 alkyl, C 1-6 alkoxy, C 1-6 haloalkoxy, C 1-6 hydroxyalkyl, C 1-6 alkylene-5-10 membered heterocycle and C 0-3 alkylene-O—C 1-6 alkylene-5-10 membered heterocycle.
• Q is methoxypyridinyl, for example 6-methoxypyridin-3-yl.
• Q represents thienyl optionally bearing one substituent independently selected from hydroxyl, halogen, C 1-6 alkyl, C 1-6 alkoxy, C 1-6 haloalkoxy, C 1-6 hydroxyalkyl, C 1-6 alkylene-5-10 membered heterocycle and C 0-3 alkylene-O—C 1-6 alkylene-5-10 membered heterocycle.
• Y is NR 2 R 3 .
• Y is a 5-10 membered heterocycle, for example a 6 membered heterocyle bearing a C 1-6 alkyl substituent.
• Y is morpholinyl, piperazinyl or (methyl)piperazinyl, for example 4-methyl piperazin-1-yl.
• R is ethyl, isopropyl, tert-butyl, cyclopropyl, 1-methylcyclopropyl, propen-2-yl, CF 3 , C 2 F 5 , oxetanyl, (methyl)oxetanyl or tetrahydrofuranyl (e.g. ethyl, isopropyl, tert-butyl, cyclopropyl, 1-methylcyclopropyl, CF 3 , C 2 F 5 , oxetanyl, (methyl)oxetanyl or tetrahydrofuranyl), such as isopropyl or tert-butyl.
• R is C(CH 3 ) 2 CH 2 OH or CH(CH 3 )CH 2 OH.
• R is 1-hydroxy-2-methylpropan-2-yl.
• R 1 is H, Br, Cl, CH 3 , CN, N(CH 3 ) 2 , CF 3 , ethynyl, OCH 3 , OCH 2 CH 3 or OCH 2 (CH 3 ) 2 .
• the atoms of the substituents R 2 and R 3 , in the group NR 2 R 3 , which are bonded to the nitrogen are independently selected from hydrogen and carbon.
• R 2 is H, CH 3 , —CH 2 CH 2 CH 3 , —(CH 2 ) 2 OH, —(CH 2 ) 2 OCH 3 , —(CH 2 ) 2 N(CH 3 ) 2 , —(CH 2 ) 2 -morpholinyl, —(CH 2 ) 2 piperazinyl or —(CH 2 ) 2 (4-methyl)piperazinyl.
• R 3 is H or CH 3 .
• R 4 is H or methyl.
• R 5 is H or methyl.
• R 6 is H or methyl.
• R 7 is H or methyl.
• R 8 is H or methyl.
• R 9 is H or methyl.
• Embodiments of the invention include compounds of formulae (I), (Ia1), (Ia2), (Ib1), (Ib2), (Id), (Ic2), (Id1), (Id2), (Ie1), (Ie2), (If1), (If2), (Ig1), (Ig2), (Ih1) and (Ih2) wherein:
• Q represents phenyl bearing one or two substituents independently selected from hydroxyl, halogen, C 1-6 alkyl, C 1-6 alkoxy, C 1-6 haloalkoxy, C 1-6 hydroxyalkyl, N(C 1-6 alkyl) 2 , C 1-6 alkylene-5-10 membered heterocycle and C 0-3 alkylene-O—C 1-6 alkylene-5-10 membered heterocycle (e.g. Q represents phenyl mono-substituted (e.g. in the para position) by methyl, methoxy, —N(CH 3 ) 2 or —OCH 2 CH 2 OCH 3 or di-substituted (e.g.
• Q represents pyridinyl bearing one substituent independently selected from hydroxyl, halogen, C 1-6 alkyl, C 1-6 alkoxy, C 1-6 haloalkoxy, C 1-6 hydroxyalkyl, C 1-6 alkylene-5-10 membered heterocycle and C 0-3 alkylene-O—C 1-6 alkylene-5-10 membered heterocycle (e.g.
• Q represents methoxypyridinyl, such as 6-methoxypyridin-3-yl
• R a and R b together with the C-atoms to which they are attached, form a fused phenyl ring, or one of R a and R b represents halo, C 1-3 alkyl or C 1-3 haloalkyl and the other independently represents halo, cyano, C 1-3 alkyl or C 1-3 haloalkyl (e.g. R a and R b both represent methyl, fluoro or chloro); R represents
• More particular embodiments of the invention include compounds of formulae (I), (Ia1), (Ia2), (Ib1), (Ib2), (Id), (Ic2), (Id1), (Id2), (Ie1), (Ie2), (If1), (If2), (Ig1), (Ig2), (Ih1) and (Ih2) wherein:
• Q represents phenyl mono-substituted (e.g. in the para position) by C 1-6 alkyl (e.g. methyl), C 1-6 alkoxy (e.g. methoxy), C 1-6 haloalkoxy or N(C 1-6 alkyl) 2 (e.g.
• N(CH 3 ) 2 (for example, Q represents phenyl substituted in the para position by methyl, methoxy or dimethylamino); R a and R b , together with the C-atoms to which they are attached, form a fused phenyl ring; R represents C 1-4 alkyl optionally substituted by one or more fluoro groups, C 3-4 alkenyl or C 3-4 cycloalkyl, which latter group is optionally substituted by methyl (e.g.
• R represents ethyl, cyclopropyl, CF 3 , C 2 F 5 , —C(CH 3 ) 2 CF 3 or, particularly, isopropyl, 1-methylcyclopropyl, propen-2-yl or tert-butyl); and/or R 1 represents Br, Cl, CN, methyl, ethyl, CF 3 , OCH 2 CH 3 , OCH 2 (CH 3 ) 2 , N(CH 3 ) 2 or, particularly, ethynyl or OCH 3 .
• Exemplary compounds of formula (I) are selected from the group consisting of:
• the compound of the invention is 3-((4-((4-(3-(3-Isopropyl-1-(p-tolyl)-1H-pyrazol-5-yl)ureido)naphthalen-1-yl)oxy)pyrimidin-2-yl)amino)-5-methoxy-N-(2-morpholinoethyl)benzamide or a pharmaceutically acceptable salt thereof.
• the pharmaceutically acceptable acid addition salts of compounds of formula (I) are meant to comprise the therapeutically active non-toxic acid addition salts that the compounds of formula (I) are able to form.
• These pharmaceutically acceptable acid addition salts can conveniently be obtained by treating the free base form with such appropriate acids in a suitable solvent or mixture of solvents.
• Appropriate acids comprise, for example, inorganic acids such as hydrohalic acids, e.g.
• hydrochloric or hydrobromic acid sulfuric, nitric, phosphoric acids and the like; or organic acids such as, for example, acetic, propanoic, hydroxyacetic, lactic, pyruvic, malonic, succinic, maleic, fumaric, malic, tartaric, citric, methanesulfonic, ethanesulfonic, benzenesulfonic, p-toluenesulfonic, cyclamic, salicylic, p-aminosalicylic, pamoic acid and the like.
• organic acids such as, for example, acetic, propanoic, hydroxyacetic, lactic, pyruvic, malonic, succinic, maleic, fumaric, malic, tartaric, citric, methanesulfonic, ethanesulfonic, benzenesulfonic, p-toluenesulfonic, cyclamic, salicylic, p-aminos
• salt forms can be converted by treatment with an appropriate base into the free base form.
• Stereoisomers as employed herein refers to isomeric molecules that have the same molecular formula and sequence of bonded atoms (constitution), but that differ only in the three-dimensional orientations of their atoms in space. This contrasts with structural isomers, which share the same molecular formula, but the bond connections and/or their order differ(s) between different atoms/groups. In stereoisomers, the order and bond connections of the constituent atoms remain the same, but their orientation in space differs.
• prodrugs of the compound of formula (I) that is to say compounds which break down and/or are metabolised in vivo to provide an active compound of formula (I).
• prodrugs include simple esters, and other esters such as mixed carbonate esters, carbamates, glycosides, ethers, acetals and ketals.
• a metabolite, as employed herein, is a compound that is produced in vivo from the metabolism of the compound of formula (I), such as, without limitation, oxidative metabolites and/or metabolites generated, for example, from O-dealkylation.
• the compounds of the disclosure include those where the atom specified is a naturally occurring or non-naturally occurring isotope.
• the isotope is a stable isotope.
• the compounds of the disclosure include, for example deuterium containing compounds and the like.
• the amine radical NR a R b in compounds of Intermediate B either comprise the group Y, as defined for compounds of formula (I) above or a protected derivative of the same.
• the fragment LG 1 in Intermediate A* is a suitable leaving group such as an imidazolyl (C 3 H 3 N 2 ) or an aryloxy radical such as a phenoxy (C 6 H 5 O) group.
• the compound represented by Intermediate A* may be isolated or in other cases may be a transient intermediate, that is not isolated, but generated in situ and used directly.
• the required activated amine may be generated by treatment of the amine precursor with a suitable chloroformate, such as, for example, phenyl chloroformate, in the presence of a base.
• a suitable chloroformate such as, for example, phenyl chloroformate
• the activated amine derivatives represented by Intermediate A* wherein LG 1 is aryloxy, for example phenoxy may thereby be generated optionally in situ and then reacted without isolation with compounds represented by Intermediate B to provide compound examples of formula (I).
• Compounds of formula (I) may include those in which the substituent Y incorporates one or more functional groups that have been protected during the coupling process and therefore require(s) subsequent deprotection.
• An example of such a procedure is the removal of a tert-butoxycarbonyl (Boc) group from a secondary amine, by treatment with an appropriate acid.
• compound examples of formula (I) may be generated by an S N Ar displacement reaction between an electrophilic heteroaryloxy fragment represented by Intermediate C, wherein LG 2 is a suitable leaving group, typically a halogen atom, for example chlorine, with an aniline component represented by Intermediate D (Scheme 2, Route B).
• the reaction proceeds under acidic conditions, for example in the presence of p-TSA and in a polar aprotic solvent such as THF and typically at elevated temperatures, for example at 70° C.
• compound examples of the invention may be prepared by a general synthetic process comprising of an amide bond forming reaction between a carboxylic acid derivative with an amine R a R b NH (Scheme 3, Routes C 1 and C 2 ) whereby NR a R b comprises Y or a protected derivative thereof, in which latter case the compounds of formula (I) are revealed following an appropriate deprotection step(s).
• the reaction is conveniently carried out in an aprotic solvent such as THF and at ambient or slightly elevated temperatures, typically RT to 40° C.
• the amide products of formula (I) may be derived from the parent carboxylic acids represented by Intermediate F (R c ⁇ H) by reaction with the amine R a R b NH under the influence of an amide (peptide) coupling reagent, and in the presence a non-nucleophilic base (Scheme 3, Route C 2 ).
• An example of a reagent that is frequently employed for these transformations is HATU and suitable bases include DIPEA and N-methylmorpholine and the like.
• the amidation reaction is typically conducted in polar aprotic solvents such as THF and at ambient temperature.
• Compounds represented by Intermediate A are either commercially available, or may be prepared by synthetic approaches that are well established in the art.
• compounds of this general structure may be prepared by condensation of the appropriate hydrazine, optionally in the form of a protected derivative thereof or a suitable salt, with the relevant ketonitrile (Scheme 4).
• the condensation/cyclisation reaction is suitably conducted in a polar protic solvent such as ethanol and in the presence of a strong acid for example concentrated hydrochloric acid and at elevated temperatures, typically at reflux.
• a polar protic solvent such as ethanol
• a strong acid for example concentrated hydrochloric acid and at elevated temperatures, typically at reflux.
• Intermediate A may also be accessed via a copper (I) mediated coupling reaction between a 1H-pyrazol-5-amine and a suitable arene Q-LG 3 in which Q is an optionally substituted aromatic nucleus as defined for compounds of formula (I) and LG 3 is a halide such as an iodine atom (Scheme 5).
• Q is an optionally substituted aromatic nucleus as defined for compounds of formula (I)
• LG 3 is a halide such as an iodine atom (Scheme 5).
• aprotic non-polar solvent such as toleune, employing a copper (I) salt as the catalyst, for example copper (I) iodide and in the presence of a copper co-ordinating ligand such as N 1 ,N 2 -dimethylcyclohexane-1,2-diamine and in the presence of a base, for example potassium carbonate and typically at elevated temperature for example at reflux.
• a copper (I) salt for example copper (I) iodide
• a copper co-ordinating ligand such as N 1 ,N 2 -dimethylcyclohexane-1,2-diamine
• a base for example potassium carbonate
• the phenol products may be reacted with a functionalised alkyl halide, for example with a nitrogen mustard, that is, with a salt of a 2-haloethylamine of formula R f (CH 2 ) 2 LG 4 , wherein LG 4 is a halogen such as a chlorine and R f is selected such that O(CH 2 ) 2 R f is allowable by the definition of Q in compounds of formula (I)
• Compounds represented by Intermediate B may be obtained from S N Ar displacement reactions between electrophilic aryloxy naphthylamines represented by Intermediate G, wherein LG 2 is a suitable leaving group such as a halogen atom, for example chlorine, with an aniline component represented by Intermediate D (Scheme 8).
• the reaction proceeds under acidic conditions, for example in the presence of p-TSA and in a polar aprotic solvent such as THF and typically at elevated temperatures, for example at 70° C.
• a protective group has been employed the products represented by Intermediate B are subsequently revealed by a suitable deprotection step(s).
• the ester and acid precursors represented by Intermediates E and F are obtainable by use of the same or analogous procedures, to those disclosed hereinabove (Scheme 1), that provide compound examples of the present invention.
• Intermediates E and F are conveniently obtained by the reaction of Intermediates H and J respectively with the activated aminopyrazole derivatives Intermediates A* (Scheme 10).
• the esters: Intermediates H and E may be readily transformed into the corresponding carboxylic acids: Intermediates J and F by hydrolysis under suitable acidic or basic conditions.
• this conversion can be effected by saponification, using a base such as lithium hydroxide, in a protic solvent or mixture of solvents, for example THF and water and at modestly elevated temperatures, typically RT to 40° C.
• the precursors represented by Intermediate G are conveniently prepared by an S N Ar displacement reaction between 4-aminonaphthalen-1-ol, either in the form of a salt or a suitable, protected derivative and an electrophilic heteroaromatic (Scheme 11), for example a dihalo heteroaromatic wherein the leaving groups LG 2 and LG 5 are both halogen atoms,
• the displacement step is conveniently carried out in a polar, aprotic solvent such as acetonitrile and in the presence of a hindered base, typified by DBU and at reduced temperature, for example at 0° C.
• the S N Ar coupling is suitably carried out in a polar non protic solvent, for example THF or IPA or DMF and in the presence of an acid catalyst such as p-TSA or TFA and most usually at elevated temperatures, typically at 60-70° C.
• a polar non protic solvent for example THF or IPA or DMF
• an acid catalyst such as p-TSA or TFA and most usually at elevated temperatures, typically at 60-70° C.
• the known aniline components represented by Intermediate D and Intermediate K were either procured from commercial sources or prepared according to published procedures. Novel examples disclosed herein were synthesised from commercially available starting materials using functional group interconversions that are well established in the art (Scheme 13).
• the (leaving) group LG 6 may be displaced with a desired R 1 group via an S N Ar reaction or transition metal-catalysed coupling.
• Intermediate K which may be hydrolysed and subjected to an amide coupling reaction to furnish examples of Intermediate D, after removal, where employed, of the nitrogen protective group.
• Intermediate D is readily made from commercially available nitro benzoic acids that are substituted with a suitable leaving group LG 6 , such as a halogen, for example fluorine.
• a suitable leaving group LG 6 such as a halogen, for example fluorine.
• Compounds of this composition may be converted into the examples of the desired anilines by a series of reactions comprising of an amide coupling, followed by an S N Ar displacement reaction and reduction of the nitro group into an amine.
• Compounds of formula (I) may alternatively be obtained by coupling of Intermediate B to an pyrazole-5-isocyanate compound, Intermediate L.
• Intermediate L may, for example, be conveniently prepared via a copper (II)-mediated Chan-Lam reaction (see, for example: Tetrahedron Lett. 1998, 39, 2941-2944), wherein an ester of a suitable pyrazole-5-carboxylic acid is coupled to an aryl- or heteroaryl-boronic acids.
• the resulting N-aryl pyrazole acid ester is saponified to yield the corresponding carboxylic acid (Intermediate M), which acid is converted to an acyl azide (e.g.
• DPPA diphenyl phosphorazidate
• Novel intermediates as described herein form an aspect of the invention.
• further aspects of the invention relate to:
• Protected derivatives of the compounds of formulae (II) and (III) include those in which the essential NH 2 group is protected.
• such protected derivatives include amides or, particularly, carbamates of those compounds.
• those protected derivatives include compounds in which a H-atom of the NH 2 group is replaced by:
• the compounds of formula (I) are p38 MAP kinase inhibitors (especially of the alpha subtype) and in one aspect the compounds are useful in the treatment of inflammatory diseases, for example COPD and/or asthma.
• the compounds of formula (I) exhibit a long duration of action and/or persistence of action in comparison to other previously disclosed allosteric p38 MAP kinase inhibitors such as, for example, BIRB796 (Pargellis, C et al., Nature Struct. Biol., 2002, 9(4):268-272).
• the compounds of formula (I) do not strongly inhibit, or bind to GSK 3 ⁇ , for example they have an IC 50 value against GSK 3a of 1500 nM or greater; such as 2,000, 3,000, 4,000, 5,000, 6,000, 7,000, 8,000, 9,000 or 10,000 nM or greater.
• Persistence of action as used herein is related to the dissociation rate or dissociation constant of the compound from the target (such as a receptor). A low dissociation rate may lead to persistence.
• a low dissociation rate in combination with a high association rate tends to provide potent therapeutic entities.
• the compounds of formula (I) are expected to be potent in vivo.
• An alternative strategy is to design treatment paradigms in which the drug is dosed directly to the inflamed organ, that is, to exploit topical administration. Whilst this approach is not suitable for treating all chronic inflammatory diseases, it has been exploited in lung disorders, such as asthma and COPD; in skin diseases, for example against atopic dermatitis and psoriasis; for nasal conditions, typified by allergic rhinitis; and in gastrointestinal diseases, such as ulcerative colitis and Crohn's disease and inflammatory diseases of the eye, such as uveitis.
• one way in which efficacy can be achieved is by the use of a drug that has a sustained duration of action and is retained in the relevant organ, thereby minimizing the risk of systemic toxicity.
• a formulation can be developed that generates a “reservoir” of the active drug which is available to sustain its desired effects.
• the first approach is exemplified by the anticholinergic drug tiotropium (Spiriva). This compound is administered topically to the lung as a treatment for COPD, and has an exceptionally high affinity for its target receptor resulting in a very slow off rate and consequently displays a sustained duration of action.
• the compounds of formula (I) is particularly suitable for topical delivery, such as topical delivery to the lungs, in particular for the treatment of respiratory disease, for example chronic respiratory diseases such as COPD and/or asthma.
• the compounds of formula (I) is suitable for sensitizing patients to treatment with a corticosteroid who have become refractory to such treatment regimens.
• the compounds of formula (I) may have antiviral properties, for example the ability to prevent the infection of cells (such as respiratory epithelial cells) with a picornavirus, in particular a rhinovirus, influenza or respiratory syncytial virus.
• a picornavirus in particular a rhinovirus, influenza or respiratory syncytial virus.
• the compound is thought to be an antiviral agent, in particular suitable for the prevention, treatment or amelioration of picornavirus infections, such as rhinovirus infection, influenza or respiratory syncytial virus.
• the compounds of formula (I) are able to reduce inflammation induced by viral infection, such as rhinovirus infection and in particular viral infections that result in the release of cytokines such as IL-8, especially in vivo.
• This activity may, for example, be tested in vitro employing a rhinovirus induced IL-8 assay as described in the Examples herein.
• the compounds of formula (I) are able to reduce ICAM1 expression induced by rhinovirus, especially in vivo.
• ICAM1 is the receptor mechanism used by so-called major groove rhinovirus serotypes to infect cells. This activity may be measured, for example by a method described in the Examples herein.
• the above properties render the compounds of formula (I) particularly suitable for use in the treatment (including prophylaxis) of exacerbations of inflammatory diseases, in particular viral exacerbations, or in the treatment of viral infections, in patients with one or more chronic conditions such as congestive heart failure, COPD, asthma, diabetes, cancer and/or in immunosuppressed patients, for example post-organ transplant.
• Such use may be in combination with anti-viral agents such as zanamivir, oseltamivir (for example oseltamivir phosphate) peramivir or laninamivir.
• the compounds of formula (I) may be useful in the treatment of one or more conditions having an inflammatory component which, suitably, may be treated by topical or local therapy.
• the compounds of formula (I) may be useful in the treatment of one or more respiratory disorders including COPD (including chronic bronchitis and emphysema), asthma, paediatric asthma, cystic fibrosis, sarcoidosis, idiopathic pulmonary fibrosis, allergic rhinitis, rhinitis and sinusitis, especially asthma, or COPD (including chronic bronchitis and emphysema).
• COPD chronic bronchitis and emphysema
• the compounds of formula (I) may be useful in the treatment of eye diseases or disorders including keratoconjunctivitis sicca (dry eye), allergic conjunctivitis, conjunctivitis, diabetic retinopathy, macular oedema (including wet macular oedema and dry macular oedema), post-operative cataract inflammation or, particularly, uveitis (including posterior, anterior and pan uveitis) (e.g.
• eye diseases or disorders including allergic conjunctivitis, conjunctivitis, diabetic retinopathy, macular oedema (including wet macular oedema and dry macular oedema), post-operative cataract inflammation or, particularly, uveitis (including posterior, anterior and pan uveitis)).
• the compounds of formula (I) may be useful in the treatment of skin diseases or disorders including allergic dermatitis, contact dermatitis, atopic dermatitis or psoriasis.
• the compounds of formula (I) may be useful in the treatment of gastrointestinal diseases or disorders including ulcerative colitis or Crohn's disease.
• the compounds of formula (I) may be useful in the treatment of joint diseases or disorders including rheumatoid arthritis or osteoarthritis and particularly inflamed joints secondary to such conditions.
• the compounds of formula (I) may be useful in the treatment of cancers including cancer of the stomach and in the inhibition of the growth and metastasis of tumours including non-small cell lung carcinoma, gastric carcinoma, colorectal carcinomas and malignant melanoma.
• the compounds of formula (I) may be useful in the treatment of certain other conditions including periodontitis, gingivitis and pharyngitis.
• Compounds of formula (I) may also re-sensitise the patient's condition to treatment with a corticosteroid, when the patient's condition has become refractory to the same.
• the present invention provides a pharmaceutical composition
• a pharmaceutical composition comprising a compound according to the disclosure optionally in combination with one or more pharmaceutically acceptable diluents or carriers.
• Diluents and carriers may include those suitable for parenteral, oral, topical, mucosal and rectal administration.
• the present invention also provides a process for preparing such a pharmaceutical composition (for example a pharmaceutical composition for parenteral, oral, topical, mucosal or rectal administration), said process comprising mixing the ingredients.
• compositions may be prepared e.g. for parenteral, subcutaneous, intramuscular, intravenous, intra-articular or peri-articular administration, particularly in the form of liquid solutions or suspensions; for oral administration, particularly in the form of tablets or capsules; for topical e.g. pulmonary or intranasal administration, particularly in the form of powders, nasal drops or aerosols and transdermal administration; for mucosal administration e.g. to buccal, sublingual or vaginal mucosa, and for rectal administration e.g. in the form of a suppository.
• compositions may conveniently be administered in unit dosage form and may be prepared by any of the methods well-known in the pharmaceutical art, for example as described in Remington's Pharmaceutical Sciences, 17th ed., Mack Publishing Company, Easton, Pa., (1985).
• Formulations for parenteral administration may contain as excipients sterile water or saline, alkylene glycols such as propylene glycol, polyalkylene glycols such as polyethylene glycol, oils of vegetable origin, hydrogenated naphthalenes and the like.
• Formulations for nasal administration may be solid and may contain excipients, for example, lactose or dextran, or may be aqueous or oily solutions for use in the form of nasal drops or metered sprays.
• typical excipients include sugars, calcium stearate, magnesium stearate, pregelatinated starch, and the like.
• compositions suitable for oral administration may comprise one or more physiologically compatible carriers and/or excipients and may be in solid or liquid form.
• Tablets and capsules may be prepared with binding agents, for example, syrup, acacia, gelatin, sorbitol, tragacanth, or poly-vinylpyrollidone; fillers, such as lactose, sucrose, corn starch, calcium phosphate, sorbitol, or glycine; lubricants, such as magnesium stearate, talc, polyethylene glycol, or silica; and surfactants, such as sodium lauryl sulfate.
• binding agents for example, syrup, acacia, gelatin, sorbitol, tragacanth, or poly-vinylpyrollidone
• fillers such as lactose, sucrose, corn starch, calcium phosphate, sorbitol, or glycine
• lubricants such as magnesium stearate, talc, polyethylene glycol
• Liquid compositions may contain conventional additives such as suspending agents, for example sorbitol syrup, methyl cellulose, sugar syrup, gelatin, carboxymethyl-cellulose, or edible fats; emulsifying agents such as lecithin, or acacia; vegetable oils such as almond oil, coconut oil, cod liver oil, or peanut oil; preservatives such as butylated hydroxyanisole (BHA) and butylated hydroxytoluene (BHT).
• suspending agents for example sorbitol syrup, methyl cellulose, sugar syrup, gelatin, carboxymethyl-cellulose, or edible fats
• emulsifying agents such as lecithin, or acacia
• vegetable oils such as almond oil, coconut oil, cod liver oil, or peanut oil
• preservatives such as butylated hydroxyanisole (BHA) and butylated hydroxytoluene (BHT).
• BHA butylated hydroxyanisole
• BHT butylated hydroxytoluen
• Solid oral dosage forms include tablets, two-piece hard shell capsules and soft elastic gelatin (SEG) capsules.
• SEG soft elastic gelatin
• a dry shell formulation typically comprises of about 40% to 60% w/w concentration of gelatin, about a 20% to 30% concentration of plasticizer (such as glycerin, sorbitol or propylene glycol) and about a 30% to 40% concentration of water. Other materials such as preservatives, dyes, opacifiers and flavours also may be present.
• the liquid fill material comprises a solid drug that has been dissolved, solubilized or dispersed (with suspending agents such as beeswax, hydrogenated castor oil or polyethylene glycol 4000) or a liquid drug in vehicles or combinations of vehicles such as mineral oil, vegetable oils, triglycerides, glycols, polyols and surface-active agents.
• a compound of formula (I) is administered topically to the lung, eye or bowel.
• a pharmaceutical composition comprising a compound of the disclosure optionally in combination with one or more topically acceptable diluents or carriers.
• Aerosol formulations typically comprise the active ingredient suspended or dissolved in a suitable aerosol propellant, such as a chlorofluorocarbon (CFC) or a hydrofluorocarbon (HFC).
• a suitable aerosol propellant such as a chlorofluorocarbon (CFC) or a hydrofluorocarbon (HFC).
• CFC propellants include trichloromonofluoromethane (propellant 11), dichlorotetrafluoromethane (propellant 114), and dichlorodifluoromethane (propellant 12).
• Suitable HFC propellants include tetrafluoroethane (HFC-134a) and heptafluoropropane (HFC-227).
• the propellant typically comprises 40% to 99.5% e.g.
• the formulation may comprise excipients including co-solvents (e.g. ethanol) and surfactants (e.g. lecithin, sorbitan trioleate and the like). Aerosol formulations are packaged in canisters and a suitable dose is delivered by means of a metering valve (e.g. as supplied by Bespak, Valois or 3M).
• a metering valve e.g. as supplied by Bespak, Valois or 3M.
• Topical administration to the lung may also be achieved by use of a non-pressurised formulation such as an aqueous solution or suspension. This may be administered by means of a nebuliser. Topical administration to the lung may also be achieved by use of a dry-powder formulation.
• a dry powder formulation will contain the compound of the disclosure in finely divided form, typically with a mass mean aerodynamic diameter (MMAD) of 1-10 ⁇ m.
• the formulation will typically contain a topically acceptable diluent such as lactose, usually of large particle size e.g. an MMAD of 100 ⁇ m or more. Examples of dry powder delivery systems include SPINHALER, DISKHALER, TURBOHALER, DISKUS and CLICKHALER.
• the compounds of the present invention i.e. compounds of formula (I), (Ia1), (Ia2), (Ib1), (Ib2), (Id), (Ic2), (Id1), (Id2), (Ie1), (Ie2), (If1), (If2), (Ig1), (Ig2), (Ih1) or (Ih2), as defined above, or pharmaceutically acceptable salts thereof) may also be administered rectally, for example in the form of suppositories or enemas, which include aqueous or oily solutions as well as suspensions and emulsions. Such compositions are prepared following standard procedures, well known by those skilled in the art.
• suppositories can be prepared by mixing the active ingredient with a conventional suppository base such as cocoa butter or other glycerides.
• a conventional suppository base such as cocoa butter or other glycerides.
• the drug is mixed with a suitable non-irritating excipient which is solid at ordinary temperatures but liquid at the rectal temperature and will therefore melt in the rectum to release the drug.
• suitable non-irritating excipient are solid at ordinary temperatures but liquid at the rectal temperature and will therefore melt in the rectum to release the drug.
• Such materials are cocoa butter and polyethylene glycols.
• the total amount of the inhibitor will be about 0.0001 to less than 4.0% (w/w).
• compositions administered according to the present invention will be formulated as solutions, suspensions, emulsions and other dosage forms.
• Aqueous solutions are generally preferred, based on ease of formulation, as well as a patient's ability to administer such compositions easily by means of instilling one to two drops of the solutions in the affected eyes.
• the compositions may also be suspensions, viscous or semi-viscous gels, or other types of solid or semi-solid compositions. Suspensions may be preferred for compounds that are sparingly soluble in water.
• an alternative for administration to the eye is intravitreal injection of a solution or suspension of the compound of the present invention.
• the compound of the present invention may also be introduced by means of ocular implants or inserts.
• compositions administered according to the present invention may also include various other ingredients, including, but not limited to, tonicity agents, buffers, surfactants, stabilizing polymer, preservatives, co-solvents and viscosity building agents.
• Preferred pharmaceutical compositions of the present invention include the inhibitor with a tonicity agent and a buffer.
• the pharmaceutical compositions of the present invention may further optionally include a surfactant and/or a palliative agent and/or a stabilizing polymer.
• tonicity agents may be employed to adjust the tonicity of the composition, preferably to that of natural tears for ophthalmic compositions.
• sodium chloride, potassium chloride, magnesium chloride, calcium chloride, simple sugars such as dextrose, fructose, galactose, and/or simply polyols such as the sugar alcohols mannitol, sorbitol, xylitol, lactitol, isomaltitol, maltitol, and hydrogenated starch hydrolysates may be added to the composition to approximate physiological tonicity.
• Such an amount of tonicity agent will vary, depending on the particular agent to be added.
• compositions will have a tonicity agent in an amount sufficient to cause the final composition to have an ophthalmically acceptable osmolality (generally about 150-450 mOsm, preferably 250-350 mOsm and most preferably at approximately 290 mOsm).
• ophthalmically acceptable osmolality generally about 150-450 mOsm, preferably 250-350 mOsm and most preferably at approximately 290 mOsm.
• the tonicity agents of the invention will be present in the range of 2 to 4% w/w.
• Preferred tonicity agents of the invention include the simple sugars or the sugar alcohols, such as D-mannitol.
• An appropriate buffer system e.g., sodium phosphate, sodium acetate, sodium citrate, sodium borate or boric acid
• the particular concentration will vary, depending on the agent employed.
• the buffer will be chosen to maintain a target pH within the range of pH 5 to 8, and more preferably to a target pH of pH 5 to 7.
• Surfactants may optionally be employed to deliver higher concentrations of inhibitor.
• the surfactants function to solubilise the inhibitor and stabilise colloid dispersion, such as micellar solution, microemulsion, emulsion and suspension.
• examples of surfactants which may optionally be used include polysorbate, poloxamer, polyosyl 40 stearate, polyoxyl castor oil, tyloxapol, triton, and sorbitan monolaurate.
• Preferred surfactants to be employed in the invention have a hydrophile/lipophile/balance “HLB” in the range of 12.4 to 13.2 and are acceptable for ophthalmic use, such as TritonX114 and tyloxapol.
• Additional agents that may be added to the ophthalmic compositions of the present invention are demulcents which function as a stabilising polymer.
• the stabilizing polymer should be an ionic/charged example with precedence for topical ocular use, more specifically, a polymer that carries negative charge on its surface that can exhibit a zeta-potential of ( ⁇ )10-50 mV for physical stability and capable of making a dispersion in water (i.e. water soluble).
• a preferred stabilising polymer of the invention would be polyelectrolyte, or polyelectrolytes if more than one, from the family of cross-linked polyacrylates, such as carbomers and Pemulen(R), specifically Carbomer 974p (polyacrylic acid), at 0.1-0.5% w/w.
• viscosity enhancing agents include, but are not limited to: polysaccharides, such as hyaluronic acid and its salts, chondroitin sulfate and its salts, dextrans, various polymers of the cellulose family; vinyl polymers; and acrylic acid polymers.
• Topical ophthalmic products are typically packaged in multidose form. Preservatives are thus required to prevent microbial contamination during use. Suitable preservatives include: benzalkonium chloride, chlorobutanol, benzododecinium bromide, methyl paraben, propyl paraben, phenylethyl alcohol, edentate disodium, sorbic acid, polyquaternium-1, or other agents known to those skilled in the art. Such preservatives are typically employed at a level of from 0.001 to 1.0% w/v. Unit dose compositions of the present invention will be sterile, but typically unpreserved. Such compositions, therefore, generally will not contain preservatives.
• a compound of formula (I) has therapeutic activity.
• the present invention provides a compound of the disclosure for use as a medicament.
• the present invention provides a compound as described herein for use in the treatment of one or more of the above mentioned conditions.
• a dry powder formulation according the present disclosure comprises magnesium or calcium stearate.
• Such formulations may have superior chemical and/or physical stability especially when such formulations also contain lactose.
• the present invention provides use of a compound as described herein for the manufacture of a medicament for the treatment of one or more of the above mentioned conditions.
• the present invention provides a method of treatment of one or more of the above mentioned conditions which comprises administering to a subject an effective amount of a compound of the disclosure or a pharmaceutical composition comprising the compound.
• treatment is intended to embrace prophylaxis as well as therapeutic treatment. Treatment of conditions or disorders also embraces treatment of exacerbations thereof.
• a compound of the disclosure may also be administered in combination with one or more other active ingredients e.g. active ingredients suitable for treating the above mentioned conditions.
• possible combinations for treatment of respiratory disorders include combinations with steroids (e.g. budesonide, beclomethasone dipropionate, fluticasone propionate, mometasone furoate, fluticasone furoate), beta agonists (e.g. terbutaline, salbutamol, salmeterol, formoterol), xanthines (e.g. theophylline), anticholinergics (e.g. ipratropium or tiotropium, for example as the bromide) and anti-viral agents (e.g. zanamivir, oseltamivir, for example as the phosphate, peramivir and laninamivir).
• steroids e.g. budesonide, beclomethasone dipropionate, fluticasone propionate, mometasone furoate, fluticasone furoate
• beta agonists e.g. terbutaline, salbutamol, salmeterol,
• gastrointestinal disorders such as Crohn's disease or ulcerative colitis
• possible combinations include combinations with, for example, one or more agents selected from the list comprising:
• possible combinations include combinations with, for example, one or more agents selected from the list comprising:
• a compound of formula (I) in combination with one or more further active ingredients, for example one or more active ingredients described above.
• the combination product may be either a single (combination) pharmaceutical formulation or a kit-of-parts.
• this aspect of the invention encompasses a pharmaceutical formulation including a compound of the present invention and another therapeutic agent, in admixture with a pharmaceutically acceptable adjuvant, diluent or carrier (which formulation is hereinafter referred to as a “combined preparation”).
• kit of parts comprising components:
• component (i) of the kit of parts is thus component (A) above in admixture with a pharmaceutically acceptable adjuvant, diluent or carrier.
• component (ii) is component (B) above in admixture with a pharmaceutically acceptable adjuvant, diluent or carrier.
• the other therapeutic agent i.e. component (B) above
• the combination product (either a combined preparation or kit-of-parts) of this aspect of the invention may be used in the treatment or prevention of an inflammatory disease (e.g. the inflammatory diseases mentioned above, such as:
• aspects of the invention described herein may have the advantage that, in the treatment of the conditions described herein, they may be more convenient for the physician and/or patient than, be more efficacious than, be less toxic than, be longer acting than, have better selectivity over, have a broader range of activity than, be more potent than, produce fewer side effects than, have a better pharmacokinetic and/or pharmacodynamic profile than, have more suitable solid state morphology than, have better stability than, or may have other useful pharmacological properties over, similar compounds, combinations, methods (treatments) or uses known in the prior art for use in the treatment of those conditions or otherwise.
• the compounds of formula (I) may additionally (or alternatively):
• A3 3-(perfluoroethyl)-1-(p-tolyl)-1H-pyrazol-5- amine R t 2.39 min (Method 2, acidic); m/z 292 (M + H) + , (ES + ). De Dios, A. et al., WO 2007/053346, 10 May 2007.
• A7 3-(1-methylcyclopropyl)-1-(p-tolyl)-1H- pyrazol-5-amine. R t 3.72 min (Method 1, acidic); m/z 228 (M + H) + , (ES + ). De Dios, A. et al., WO 2007/053346, 10 May 2007.
• A8 3-tert-butyl-1-p-tolyl-1H-pyrazol-5-amine. R t 2.46 min (Method 1 basic); m/z 230 (M + H) + , (ES + ). Cirillo, P. F. et al., WO 2000/43384, 27 Jul. 2000.
• Phenyl chloroformate (0.85 ml, 6.79 mmol) was added to a stirred mixture of Intermediate A19 (1.75 g, 6.18 mmol) and NaHCO 3 (1.05 g, 12.50 mmol) in DCM (20 mL) and THF (15 mL) at rt. The mixture was stirred for 2 h then partitioned between DCM (50 mL) and water (50 mL). The organic layer was separated, dried (MgSO 4 ) and evaporated under reduced pressure to yield a colourless oil. The oil was crystallised from cyclohexane to yield Intermediate A19* (2.14 g) as a white solid.
• reaction vessel was then cooled in an ice bath and 50 wt % T3P in EtOAc (7.65 ml, 12.85 mmol) from a fresh bottle was added. The ice bath was removed, the reaction allowed to warm to rt, and stirred at this temperature for 1 h.
• the reaction was partitioned between sat. NaHCO 3 (50 mL) and DCM (50 mL). The aqueous phase was back extracted with fresh DCM (50 mL). The combined organic extracts were dried (MgSO 4 ), filtered and concentrated in vacuo to afford an orange oil (3.12 g).
• the crude product was purified by chromatography on silica gel (80 g column, 0-10% MeOH in DCM) to afford Intermediate D3 (1.96 g) as an orange oil.
• Pd(PPh 3 ) 4 (0.269 g, 0.233 mmol) was added to a degassed suspension of 3-amino-5-bromobenzamide (0.5 g, 2.325 mmol), CuI (0.044 g, 0.233 mmol), and ethynyltriisopropylsilane (0.782 mL, 3.49 mmol) in TEA (2 mL) and DMF (2 mL). Heated at 80° C. (block temp.) for 1 h, then cooled and filtered (Whatman glass fibre pad GF/A).
• Pd(PPh 3 ) 4 (0.218 g, 0.189 mmol) was added to a degassed suspension of 3-amino-5-bromo-N-(2-(dimethylamino)ethyl)benzamide (0.54 g, 1.887 mmol), CuI (0.036 g, 0.189 mmol), and ethynyltriisopropylsilane (0.635 mL, 2.83 mmol) in TEA (2 mL) and DMF (2 mL). Heated at 80° C. (block temp.) for 1 h then cooled and filtered (Whatman glass fibre pad GF/A).
• the crude product was purified by chromatography on the Companion (80 g column, 0-5% MeOH in DCM) to afford the product as an orange solid.
• the solid was triturated in a mixture of MeOH and hexane giving the product as a white solid at 90% purity. The remaining 10% was identified as the de-boc material.
• the mixture was suspended in DCM (70 ml) and a small volume of THF added for solubility (5 ml). Triethylamine was added (0.14 ml, 0.8 mmol) followed by di-tert-butyl dicarbonate (90 mg, 0.4 mmol). The reaction was stirred at rt overnight.
• reaction mixture was concentrated onto silica and crude product purified by chromatography on the Companion (80 g column, 10-50% EtOAc in hexane) to afford methyl 3-((4-((4-((tert-butoxycarbonyl)amino)naphthalen-1-yl)oxy)pyrimidin-2-yl)amino)-5-ethynylbenzoate (476 mg) as a white solid.
• Triethylamine (4.00 ⁇ L, 0.029 mmol) was added to a mixture of Intermediate A3* (56.6 mg, 0.138 mmol) and Intermediate B21 (70 mg, 0.138 mmol) in isopropyl acetate (1.6 mL) and the mixture heated at 60° C. for 1 h during which time a thick suspension was formed. The reaction was cooled to rt and diluted with DCM and MeOH (3:1, 15 mL). The solution was concentrated onto silica gel. The crude product was purified by chromatography on the Companion (40 g column, 0-10% MeOH in DCM) to afford the title compound (78 mg) as a white solid.
• Triethylamine (5 ⁇ L, 0.036 mmol) was added to a mixture of Intermediate A19* (70 mg, 0.174 mmol) and Intermediate B21 (100 mg, 0.189 mmol) in isopropyl acetate (2 mL) and the mixture heated at 50° C. for 2 h. The resulting solid was collected by filtration and washed with isopropyl acetate (2 mL) followed by isohexane (2 mL). The filter cake was resuspended in acetonitrile (2 mL) and collected by filtration to afford the title compound (65 mg) as a white solid.
• Triethylamine (5 ⁇ L, 0.036 mmol) was added to a mixture of Intermediate A9* (70 mg, 0.192 mmol) and Intermediate B21 (111 mg, 0.209 mmol) in isopropyl acetate (2 mL) and the mixture heated at 50° C. for 2 h. The resulting solid was collected by filtration and washed with isopropyl acetate (2 mL) followed by isohexane (2 mL). The filter cake was resuspended in acetonitrile (4 mL) and collected by filtration to afford the title compound (45 mg) as a white solid.
• Triethylamine (6.00 ⁇ L, 0.043 mmol) was added to a mixture of Intermediate A20* (70 mg, 0.194 mmol) and Intermediate B21 (99 mg, 0.194 mmol) in isopropyl acetate (2 mL) and the mixture heated at 60° C. for 1 h during which time a thick suspension was formed. The suspension was filtered and the solid obtained was dried at 40° C. under vacuum affording the title compound (118 mg) as a white solid.
• Triethylamine (6.00 ⁇ L, 0.043 mmol) was added to a mixture of Intermediate A22* (70 mg, 0.192 mmol) and Intermediate B21 (97 mg, 0.192 mmol) in isopropyl acetate (2 mL) and the mixture heated at 60° C. for 1 h during which time a thick suspension was formed. The mixture was filtered and the resulting solid dried at 40° C. under vacuum overnight. The material was triturated in a mixture of Et 2 O and EtOAc (2:1) with sonication and the suspended solid re-isolated by filtration, washing with EtOAc. The material was dried at 40° C. under vacuum affording the title compound (38 mg) as pale grey solid.
• DPPA (107 ⁇ L, 0.496 mmol) was added to a stirred solution of Intermediate M1 (95 mg, 0.331 mmol) and triethylamine (92 ⁇ L, 0.661 mmol) in DMF (3 mL) at 0° C. The mixture was allowed to warm to rt and stir for 45 min. Intermediate B21 (177 mg, 0.347 mmol) was added and the mixture was heated to 100° C. for 2 h. The mixture was diluted with water (10 mL) and extracted with ethyl acetate (3 ⁇ 10 mL). The combined organic phases were washed with saturated brine (10 mL), dried (MgSO 4 ) and concentrated under reduced pressure.
• Triethylamine (5.00 ⁇ l, 0.036 mmol) was added to a mixture of Intermediate A8* (60 mg, 0.172 mmol) and Intermediate B22 (100 mg, 0.191 mmol) in isopropyl acetate (3 mL) and the mixture heated at 60° C. for 1 h during which time a gel-like solid was formed. The reaction was cooled to rt and diluted with EtOAc. The suspended solid was collected by filtration, washing with further EtOAc. The recovered solid was dried at 40° C. under vacuum overnight affording the title compound (87 mg) as a beige solid.
• Triethylamine (10.0 ⁇ l, 0.072 mmol) was added to a mixture of Intermediate A8* (118 mg, 0.339 mmol) and Intermediate B23 (200 mg, 0.373 mmol) in isopropyl acetate (4 mL) and the mixture heated at 60° C. for 1 h during which time a gel-like solid was formed.
• the reaction mixture was cooled to rt and diluted with EtOAc.
• the solid was collected by filtration washing with EtOAc.
• the solid obtained was further dried at 40° C. under vacuum to afford the title compound (201 mg) as a white solid.
• Triethylamine (6.00 ⁇ L, 0.043 mmol) was added to a mixture of Intermediate A8* (72.9 mg, 0.209 mmol) and Intermediate B24 (120 mg, 0.230 mmol) in isopropyl acetate (4 mL) and the mixture heated at 60° C. for 1 h during which time a gel-like solid was formed. The reaction was cooled to rt and diluted with EtOAc. The suspended solid was collected by filtration, washing with further EtOAc. The recovered solid was dried at 40° C. under vacuum overnight to afford the title compound (111 mg) as a pale beige solid.

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