Classifications

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  • C07D207/34—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having two double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
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  • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
  • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
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Definitions

• the invention relates to the field of medical treatment and diagnosis of disease. More particularly, this invention relates to novel sulfonylurea and related compounds and their use in treating, or identifying a disease or condition responsive to modulation of NLRP3 or inhibition of the activation of NLRP3 or related components of the inflammatory process.
• NLR NOD-like receptor
• NLRP3 pyrin domain-containing protein 3
• NLRP3 is an intracellular signalling molecule that senses many pathogen-derived, environmental and host-derived factors. Upon activation, NLRP3 binds to apoptosis-associated speck-like protein containing a caspase activation and recruitment domain (ASC). ASC then polymerises to form a large aggregate known as an ASC speck. Polymerised ASC in turn interacts with the cysteine protease caspase-1 to form a complex termed the inflammasome. This results in the activation of caspase-1 , which cleaves the proinflammatory cytokines IL-1 ⁇ and IL-18 to their active forms and mediates a type of inflammatory cell death known as pyroptosis. The ASC speck can also recruit and activate caspase-8, which can process pro-IL-1 ⁇ and pro-IL-18 and trigger apoptotic cell death.
• ASC caspase activation and recruitment domain
• Caspase-1 cleaves pro-IL-1 ⁇ and pro-IL-18 to their active forms, which are secreted from the cell. Active caspase-1 also cleaves gasdermin-D to trigger pyroptosis. Through its control of the pyroptotic cell death pathway, caspase-1 also mediates the release of alarm in molecules such as IL-33 and high mobility group box 1 protein (HMGB1 ). Caspase-1 also cleaves intracellular IL-1 R2 resulting in its degradation and allowing the release of IL- 1 a. In human cells caspase-1 may also control the processing and secretion of IL-37. A number of other caspase-1 substrates such as components of the cytoskeleton and glycolysis pathway may contribute to caspase-1 -dependent inflammation.
• NLRP3-dependent ASC specks are released into the extracellular environment where they can activate caspase-1 , induce processing of caspase- 1 substrates and propagate inflammation.
• Active cytokines derived from NLRP3 inflammasome activation are important drivers of inflammation and interact with other cytokine pathways to shape the immune response to infection and injury.
• I L-1 ⁇ signalling induces the secretion of the pro-inflammatory cytokines IL-6 and TNF.
• IL-1 ⁇ and I L- 8 synergise with IL-23 to induce I L- 7 production by memory CD4 Th17 cells and by ⁇ T cells in the absence of T cell receptor engagement.
• IL- 18 and IL-12 also synergise to induce IFN- ⁇ production from memory T cells and NK cell driving a Th1 response.
• PRRs intracellular pattern recognition receptors
• NLRs nuclear-binding protein receptors
• NLRP1 and NLRC4 are also capable of forming inflammasomes.
• NLRP1 and NLRC4 are also capable of forming inflammasomes.
• non-NLR PRRs such as the double- stranded DNA (dsDNA) sensors absent in melanoma 2 (AIM2) and interferon, gamma inducible protein 16 (IFI16).
• dsDNA double- stranded DNA
• AIM2 interferon, gamma inducible protein 16
• IFI16 interferon, gamma inducible protein 16
• NLRP3-dependent IL-1 ⁇ processing can also be activated by an indirect, non-canonical pathway downstream of caspase-1 1 .
• NLRP3 The inherited CAPS diseases Muckle-Wells syndrome (MWS), familial cold autoinflammatory syndrome and neonatal-onset multisystem inflammatory disease are caused by gain-of-function mutations in NLRP3, thus defining NLRP3 as a critical component of the inflammatory process.
• NLRP3 has also been implicated in the pathogenesis of a number of complex diseases, notably including metabolic disorders such as type 2 diabetes, atherosclerosis, obesity and gout.
• NLRP3 A role for NLRP3 in diseases of the central nervous system is emerging, and lung diseases have also been shown to be influenced by NLRP3. Furthermore, NLRP3 has a role in the development of liver disease, kidney disease and aging. Many of these associations were defined using Nlrp3 mice, but there have also been insights into the specific activation of NLRP3 in these diseases. In type 2 diabetes, the deposition of islet amyloid polypeptide in the pancreas activates NLRP3 and I L- ⁇ signaling, resulting in cell death and inflammation.
• NLRP3 inflammasome Several small molecules have been shown to inhibit the NLRP3 inflammasome. Glyburide inhibits IL-1 ⁇ production at micromolar concentrations in response to the activation of NLRP3 but not NLRC4 or NLRP1 .
• Other previously characterised NLRP3 inhibitors include parthenolide, 3,4-methylenedioxy-P-nitrostyrene and dimethyl sulfoxide (DMSO), although these agents have limited potency and are nonspecific
• NLRP3-related diseases include biologic agents that target IL-1 . These are the recombinant IL-1 receptor antagonist anakinra, the neutralizing IL-1 ⁇ antibody canakinumab and the soluble decoy IL-1 receptor rilonacept. These approaches have proven successful in the treatment of CAPS, and these biologic agents have been used in clinical trials for other IL- ⁇ -associated diseases.
• NLRP3 inflammasome Several small molecules have been shown to inhibit the NLRP3 inflammasome. Glyburide inhibits IL- ⁇ production at micromolar concentrations in response to the activation of NLRP3 but not NLRC4 or NLRP1 .Other previously characterised NLRP3 inhibitors include parthenolide, 3,4-methylenedioxy-P-nitrostyrene and dimethyl sulfoxide (DMSO), although these agents have limited potency and are nonspecific.
• DMSO dimethyl sulfoxide
• cytokine release inhibitory drugs CRIDs
• CRIDs are a class of diarylsulfonylurea containing compounds that inhibit the post-translational processing of IL-1 ⁇ . Post-translational processing of IL-1 ⁇ is accompanied by activation of caspase-1 and cell death. CRIDs arrest activated monocytes so that caspase-1 remains inactive and plasma membrane latency is preserved.
• Ri is selected from the group consisting of cycloalkyl, aryl, heteroaryl and heterocyclyl, all of which may be optionally substituted;
• R 2 is selected from the group consisting of cycloalkyl, aryl, heteroaryl and heterocyclyl, all of which may be optionally substituted; and both Ri is directly bonded to J and R 2 is directly bonded to the adjacent nitrogen, via a carbon atom .
• a pharmaceutical composition comprising a compound of the first aspect, or a pharmaceutically acceptable salt, solvate or prodrug thereof, and a pharmaceutically acceptable carrier, diluent and/or excipient.
• a third aspect of the invention resides in a method of treatment or prevention of a disease, disorder or condition including the step of administering an effective amount of a compound of the first aspect, or a pharmaceutically effective salt, solvate or prodrug thereof, or the pharmaceutical composition of the second aspect to thereby treat or prevent the disease disorder or condition.
• a fourth aspect of the invention provides for a compound of the first aspect, or a pharmaceutically effective salt, solvate or prodrug thereof, or the pharmaceutical composition of the second aspect for use in the treatment or prevention of a disease, disorder or condition.
• a fifth aspect of the invention provides for use of a compound of the first aspect, or a pharmaceutically effective salt, solvate or prodrug thereof, in the manufacture of a medicament for the treatment or prevention of a disease, disorder or condition.
• the disease, disorder or condition is responsive to inhibition of activation of the NLRP3 inflammasome.
• the disease, disorder or condition is a disease, disorder or condition of the immune system, the cardiovascular system, the endocrine system, the gastrointestinal tract, the renal system, the respiratory system, the central nervous system, is a cancer or other malignancy and/or is caused by or associated with a pathogen.
• a method of diagnosing a disease, disorder or condition in a mammal including the step of administering a labelled compound of formula (I), (la), (lb), (Ic) or (I I), or a pharmaceutically effective salt, solvate or prodrug thereof, to the mammal or to a biological sample obtained from the mammal to facilitate diagnosis of the disease disorder or condition in the mammal.
• a seventh aspect of the invention resides in a method of modulating the activity of a biological target comprising the step of exposing the biological target to a compound of the first aspect, or a pharmaceutically acceptable salt thereof.
• the biological target may be selected from the group consisting of the NLRP3 inflammasome, ⁇ _-1 ⁇ , IL-17, IL-18, IL-1 a, IL-37, IL-33 and Th17 cells.
• FIG 1 A to 1 C is a series of graphical representations of the plasma concentrations of a known sulfonylurea (MCC950) following different dosing levels in mice; and
• FIG 2A to 2C is a series of graphical representations of the plasma concentrations of a sulfonylurea of the present invention (MCC7840) following different dosing levels in mice.
• the present invention is predicated, at least in part, on the finding that certain sulfonyl ureas and related compounds have advantageous properties and show useful activity in the inhibition of activation of the NLRP3 inflammasome and/or inhibition of IL-1 ⁇ and/or IL-17 and/or IL-18, and/or IL-1 , and/or IL-37, and/or IL-33 as well as interfere with or modulate the activity of T helper cells such as Th17.
• the compounds of the invention are useful in the treatment of a wide range of disorders in which the inflammation process, or the NLRP3 inflammasome and/or IL-1 ⁇ and/or IL-17 and/or IL-18, and/or IL-1 a, and/or IL-37, and/or IL-33 and/or Th17 cells play a part.
• NLRP3 inhibition may block all processes downstream of NLRP3, including ASC speck formation and caspase-8 and caspase-1 activation. Consequently, NLRP3 inhibition will block all caspase-1 dependent processes such as IL-1 ⁇ , IL-18 and IL-37 processing and secretion, gasdermin D cleavage, pyroptosis, and release of IL-1 a, IL-33 and HMGB. Furthermore, NLRP3-dependent extracellular release of the ASC speck will be blocked, and caspase-8-dependent pro-IL-1 ⁇ and pro-IL-18 cleavage and apoptotic cell death will be prevented. Thus, specific inhibition of NLRP3 by compounds of the first aspect will prevent multiple downstream inflammatory signals and should therefore prove more effective anti-inflammatory therapy than IL-1 blockade alone.
• Anti-IL-1 biologies block IL-1 derived from NLRP3-independent sources, such IL-1 produced by other inflammasomes (e.g. NLRC4, NLRP1 , NLRP6, AIM2) and IL-1 generated by the latter pathways may be important for host defence against pathogens.
• IL-1 /IL-1 R antagonists exhibit increased incidence of upper airway infections.
• Specific inhibition of NLRP3 by the present compounds may thus exert less generalised immunosuppression compared to anti-IL-1 biologies.
• IL-1 ⁇ and IL-18, generated by the Nlrp3/caspase-1 axis play critical roles in driving IL-17 production by CD4 Th17 cells and ⁇ T cells.
• IL-1 ⁇ and IL- 18 synergise with IL-23 to induce IL-17 production by memory CD4 Th17 cells and by ⁇ T cells in the absence of TCR engagement.
• IL-1 -driven IL-17 has also been implicated in psoriasis, type I diabetes, rheumatoid arthritis, type 2 diabetes mellitus, atherosclerosis, obesity, gout, and recently, asthma.
• each of these diseases has been shown to involve the activation of tissue macrophages, dendritic cells, or brain microglia, driven by either soluble alarmins, or the frustrated phagocytosis of metabolites that accumulate extracellularly.
• NLRP3 senses these events, leading to IL-1 release, triggering inflammation to clear the offensive material. Disease will result if this process becomes chronic or over-activated, which explains why so many diseases have been shown to involve NLRP3.
• Inhibitors that act to prevent NLRP3 activation hence can have utility in IL-17 driven, as well as IL-1 driven diseases.
• pharmaceutically acceptable salt refers to salts which are toxicologically safe for systemic or localised administration such as salts prepared from pharmaceutically acceptable non-toxic bases or acids including inorganic or organic bases and inorganic or organic acids.
• the pharmaceutically acceptable salts may be selected from the group including alkali and alkali earth, ammonium, aluminium, iron, amine, glucosamine, chloride, sulphate, sulphonate, bisulphate, nitrate, citrate, tartrate, bitarate, phosphate, carbonate, bicarbonate, malate, maleate, napsylate, fumarate, succinate, acetate, benzoate, terephthalate, palmoate, piperazine, pectinate and S-methyl methionine salts and the like.
• alkyl refers to a straight-chain or branched alkyl substituent containing from, for example, 1 to about 12 carbon atoms, preferably 1 to about 9 carbon atoms, more preferably 1 to about 6 carbon atoms, even more preferably from 1 to about 4 carbon atoms, still yet more preferably from 1 to 2 carbon atoms.
• substituents may be selected from the group consisting of methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, isobutyl, terf-butyl, pentyl, isoamyl, 2-methylbutyl, 3-methylbutyl, hexyl, heptyl, 2-methylpentyl, 3-methylpentyl, 4-methylpentyl, 2-ethylbutyl, 3- ethylbutyl, octyl, nonyl, decyl, undecyl, dodecyl and the like.
• the number of carbons referred to relates to the carbon backbone and carbon branching but does not include carbon atoms belonging to any substituents, for example the carbon atoms of an alkoxy substituent branching off the main carbon chain.
• Substituted alkyl includes alkyl substituted with one or more moieties selected from the group consisting of halo ⁇ e.g., CI, F, Br, and I); halogenated alkyl ⁇ e.g., CF 3 , 2-Br-ethyl, CH 2 F, CH 2 CI, CH 2 CF 3 , or CF 2 CF 3 ); hydroxyl; amino; carboxylate; carboxamido; alkylamino; arylamino; alkoxy; aryloxy; nitro; azido; cyano; thio; sulfonic acid; sulfate; phosphonic acid; phosphate; and phosphonate as well as those described under the definition of Optionally substituted'.
• alkenyf refers to optionally substituted unsaturated linear or branched hydrocarbon groups, having 2 to 12 carbon atoms, preferably 2 to 9 carbon atoms, more preferably 2 to 6 carbon atoms and having at least one carbon-carbon double bond.
• the alkenyl group may have a specified number of carbon atoms, for example, C2-C6 alkenyl which includes alkenyl groups having 2, 3, 4, 5 or 6 carbon atoms in linear or branched arrangements.
• the number of carbons referred to relates to the carbon backbone and carbon branching but does not include carbon atoms belonging to any substituents.
• substituents may be selected from the group consisting of ethenyl, propenyl, isopropenyl, butenyl, s- and t-butenyl, pentenyl, hexenyl, hept-l,3-diene, hex-l,3-diene, non-l,3,5-triene and the like.
• Substituted alkenyl includes alkenyl substituted with one or more moieties selected from the group consisting of halo ⁇ e.g., CI, F, Br, and I); halogenated alkyl ⁇ e.g., CF 3 , 2-Br-ethyl, CH 2 F, CH 2 CI, CH 2 CF 3 , or CF 2 CF 3 ); hydroxyl; amino; carboxylate; carboxamido; alkylamino; arylamino; alkoxy; aryloxy; nitro; azido; cyano; thio; sulfonic acid; sulfate; phosphonic acid; phosphate; and phosphonate as well as those described under the definition of Optionally substituted'.
• halo ⁇ e.g., CI, F, Br, and I
• halogenated alkyl ⁇ e.g., CF 3 , 2-Br-ethyl, CH 2 F, CH 2
• alkoxy as used herein means straight or branched chain alkyl groups linked by an oxygen atom (i.e., -O-alkyl), wherein alkyl is as described above.
• alkoxy refers to oxygen-linked groups comprising 1 to 10 carbon atoms ("C1 -10 alkoxy”).
• alkoxy refers to oxygen-linked groups comprising 1 to 8 carbon atoms ("C1 -8 alkoxy"), 1 to 6 carbon atoms (“C 1 -6 alkoxy”), 1 to 4 carbon atoms (“C1 -4 alkoxy") or 1 to 3 carbon atoms ("C1 -3 alkoxy').
• cycloalkyi and cycloalkenyl refers to optionally substituted saturated and unsaturated mono-cyclic, bicyclic or tricyclic carbon groups.
• the cycloalkyi or cycloalkenyl group may have a specified number of carbon atoms, for example, C3-C6 cycloalkyi or cycloalkenyl includes within its scope a carbocyclic group having 3, 4, 5 or 6 carbon atoms.
• substituents may be selected from the group consisting of cyclopropyl, cyclobutyl, cyclopentyl, cyclopentenyl, cyclohexyl, cyclohexenyl, cyclohexadienyl and the like.
• Substituted cycloalkyl or cycloalkenyl includes substitutions with one or more moieties selected from the group consisting of halo (e.g. , CI, F, Br, and I); halogenated alkyl (e.g. , CF 3 , 2-Br-ethyl, CH 2 F,
• alkylthio as used herein means a thio group with one or more alkyl substituents, where alkyl is defined as above.
• amino as used herein means a moiety represented by the structure NR 23 , and includes primary amines, and secondary and tertiary amines substituted by alkyl (i.e., alkylamino).
• R 23 may represent, for example, two hydrogen atoms, two alkyl moieties, or one hydrogen atom and one alkyl moiety.
• 'aryi refers to a stable monocyclic, bicyclic, or tricyclic carbon ring of up to 8 members in each ring, wherein at least one ring is aromatic as defined by the HCickel 4n+2 rule.
• the term includes polycyclic systems comprising saturated carbon rings or heteroaryl or heterocyclic groups so long as at least one ring is aryl, as described.
• aralkyl and "arylalkyl” as used herein mean an aryl group as defined above linked to the molecule through an alkyl group as defined above.
• heteroaryl refers to an aryl group containing from one or more (particularly one to four) non-carbon atom(s) (particularly N, O or S) or a combination thereof, which heteroaryl group is optionally substituted at one or more carbon or nitrogen atom(s).
• Heteroaryl rings may also be fused with one or more cyclic hydrocarbon, heterocyclic, aryl, or heteroaryl rings.
• Heteroaryl includes, but is not limited to, 5-membered heteroaryls having one hetero atom (e.g.
• heteroaryls having two heteroatoms in 1 ,2 or 1 ,3 positions (e.g., oxazoles, pyrazoles, imidazoles, thiazoles, purines); 5-membered heteroaryls having three heteroatoms (e.g., triazoles, thiadiazoles); 5-membered heteroaryls having four heteroatoms (e.g., tetrazoles); 6-membered heteroaryls with one heteroatom (e.g., pyridine, quinoline, isoquinoline, phenanthrine, 5,6-cycloheptenopyridine); 6-membered heteroaryls with two heteroatoms (e.g., pyridazines, cinnolines, phthalazines, pyrazines, pyrimidines, quinazolines); 6-membered heretoaryls with three heteroatoms (e.g.,
• Heterocyclyl refers to a non-aromatic ring having 5 to 8 atoms in the ring and of those atoms 1 to 4 are heteroatoms. Heterocyclic rings may also be fused with one or more cyclic hydrocarbon, heterocyclic, aryl, or heteroaryl rings. Heterocyclic includes partially and fully saturated heterocyclic groups. Heterocyclic systems may be attached to another moiety via any number of carbon atoms or heteroatoms of the radical and may be both saturated and unsaturated.
• heterocyclic include C 4 -C 6 selenocycles, pyrrolidinyl, pyrrolinyl, pyranyl, piperidinyl, piperazinyl, morpholinyl, tetrahydrofuranyl, tetrahydrothiophenyl, pyrazolinyl, dithiolyl, oxathiolyl, dioxanyl, dioxinyl, oxazinyl, azepinyl, diazepinyl, thiazepinyl, oxepinyl and thiapinyl, imidazolinyl, thiomorpholinyl, and the like.
• Optionally substituted in reference to a substituent group refers to substituent groups optionally substituted with one or more moieties, for example, those selected from the group consisting of optionally substituted C1 - 10 alkyl (e.g., optionally substituted C1 -6 alkyl); optionally substituted C3-6 cycloalkyl (e.g., optionally substituted cyclopropyl); optionally substituted hydroxyalkyl; optionally substituted C1 -10 alkoxy (e.g., optionally substituted C1 -6 alkoxy); optionally substituted C2-10 alkenyl; optionally substituted C2-10 alkynyl; optionally substituted C6-C12 aryl; aryloxy; optionally substituted heteroaryl; optionally substituted heterocyclyl; halo (e.g., CI, F, Br, and I); hydroxyl; halogenated alkyl (e.g., CF 3 , 2-Br-ethy
• a range of the number of atoms in a structure is indicated (e.g. , a Ci -Ci 2 , C-i-C-io, C1-C9, C1-C6, Ci-C 4 , or C 2 -C 2 o, C 2 -C-
• d-C-i 2 1 -9 carbon atoms (e.g. , C1 -C9), 1 -6 carbon atoms (e.g. , C-1 -C6), 1 -4 carbon atoms (e.g. , Ci-C 4 ), 1 -3 carbon atoms (e.g., Ci-C 3 ), or 2-8 carbon atoms (e.g., C 2 -C 8 ) as used with respect to any chemical group (e.g.
• alkyl, etc. referenced herein encompasses and specifically describes 1 , 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1 , and/or 12 carbon atoms, as appropriate, as well as any sub-range thereof (e.g., 1 -2 carbon atoms, 1 -3 carbon atoms, 1 -4 carbon atoms, 1 -5 carbon atoms, 1 -6 carbon atoms, 1 -7 carbon atoms, 1 -8 carbon atoms, 1 -9 carbon atoms, 1 -10 carbon atoms, 1 -1 1 carbon atoms, 1 -12 carbon atoms, 2-3 carbon atoms, 2-4 carbon atoms, 2-5 carbon atoms, 2-6 carbon atoms, 2-7 carbon atoms, 2-8 carbon atoms, 2-9 carbon atoms, 2-10 carbon atoms, 2-1 1 carbon atoms, 2-12 carbon atoms, 3-4 carbon atoms, 3-5 carbon atoms, 3-6 carbon atoms, 3-7 carbon atoms, 3-8 carbon atoms, 3-5
• R-i is selected from the group consisting of cycloalkyl, aryl, heteroaryl and heterocyclyl, all of which may be optionally substituted;
• R 2 is selected from the group consisting of cycloalkyl, aryl, heteroaryl and heterocyclyl, all of which may be optionally substituted; and both R-i is directly bonded to J and R 2 is directly bonded to the adjacent nitrogen, via a carbon atom.
• W is O.
• J is S.
• Ri is selected from the group consisting of C5 or C 6 cycloalkyl, 5-membered or 6-membered heteroaryl, bicyclic heteroaryl wherein at least one ring is heteroaryl, phenyl, biphenyl, phenylheterocyclyl, 5- membered or 6-membered heterocyclyl, and heterocyclylcycloalkyl, all of which may be optionally substituted.
• W is O
• J is S
• R-i is selected from the group consisting of pyrazole, furan, tetrahydrofuran, tetrahydropyran, pyran, pyrrolidine, pyrrole, triazole, tetrazole, imidazole, pyridine, morpholine, piperazine, piperidine, substituted phenyl, phenylheteroaryl, phenylheterocyclyl, biphenyl, quinoline, isoquinoline, naphthyl, pyrazine and pyrimidine, all of which may be optionally substituted as appropriate.
• W is O
• J is S
• R-i 2-furan or 2- thiophene it is selected from unsubstituted 2-furan or 2,5-substituted furan and unsubstituted 2-thiophene or 2,5-substituted thiophene.
• R-i is an unsubstituted furan then it has the ability to cross the blood brain barrier at levels about 10 times greater than CRID3, a prior art sulfonylurea.
• R-i is 5-membered heterocyclyl or heteroaryl, each of which may be optionally substituted, comprising at least one, preferably at least two ring heteroatoms selected from N, 0 and S.
• Ri is a nitrogen heterocyclyl or nitrogen heteroaryl, each of which may be optionally substituted.
• Ri is 5-membered nitrogen heterocyclyl or 5- membered nitrogen heteroaryl, each of which may be optionally substituted.
• Ri is 5-membered heterocyclyl or 5-membered heteroaryl, each comprising at least two ring nitrogen atoms and each of which rings may be optionally substituted.
• W is O
• J is S
• R-i is selected from the group consisting of quinoline, isoquinoline, naphthyl, pyrazine, tetrazole, imidazole, pyrrolidine, pyrrole, tetrahydropyran, pyran, piperidine, piperazine, pyrazole, pyridine, pyrimidine and triazole, each of which may be optionally substituted.
• R-i and/or R 2 may comprise a selenocycle.
• R 2 may be selected from bicyclic and tricyclic hydrocarbons, 5-, 6- and 7-membered heterocycle or heteroaryl, each of which rings may be optionally substituted, and substituted phenyl.
• the tricyclic hydrocarbon may be an indacene.
• R 2 may be selected from 5-, 6- or 7- membered nitrogen heterocycles, 6-membered nitrogen heteroaryl and aryl with fused cycloalkyl ring.
• W is 0, J is S and Ri may be selected from the group consisting of:
• R 2 may be selected from:
• each incidence of Y is independently selected from C, N, S and O, and which may be optionally substituted, as appropriate;
• 5 are independently selected from the group consisting of hydrogen, halo, cyano, amide, sulphonamide, acyl, hydroxyl, Ci- Ce alkyl, d-C6 haloalkyi, Cs-Cs cyloalkyl, and C-1 -C6 alkoxy, all of which groups may be optionally substituted, as appropriate, with halo, cyano or C C 6 alkoxy; and wherein R-n and R 2 may combine to form phenyl, a 5- or 6-membered oxygen heterocycle or a 5- or 6-membered nitrogen heteroaryl, each of which may be optionally substituted;
• R-12 and R-13 may combine to form a 5- or 6-membered nitrogen heteroaryl, which may be optionally substituted;
• RH and R15 may combine to form a 5- or 6-membered cycloalkyl ring, phenyl, a 5- or 6-membered oxygen heterocycle or a 5- or 6-membered nitrogen heteroaryl, each of which may be optionally substituted.
• each incidence of Y is a carbon and R 5 is hydrogen or halo.
• R 2 and R 4 are hydrogen
• R-n and R 5 are C C 6 alkyl
• 3 is hydrogen or halo.
• R 2 is selected from a substituted or hydrogenated indacene, a 2,6-dialkylphenyl, a 2,6-dialkyl-4-halophenyl, 2,6-dicycloalkylphenyl, and a 2,6-dicycloalkyl-4-halophenyl.
• R 2 is selected from hexahydroindacene, 2,6-diisopropylphenyl 2,6-diisopropyl-4-chlorophenyl, 2,6- dicyclopropylphenyl and 2,6-dicyclopropyl-4-chlorophenyl.
• W is O and J is S, Ri is heteroaryl and R 2 is
• each Y is CH and R 5 is H or halogen, preferably R 5 is H.
• W is O and J is S, Ri is heteroaryl and R 2
• R-11 and Ri 5 are Ci -6 alkyl, preferably isopropyl
• Ri 3 is H or halogen, preferably H or CI.
• W is 0 and J is S, Ri is heteroaryl and R 2
• R-,-, and R 5 are isopropyl, R 2 and R are H, and R 3 is H or CI.
• the compound of formula (I) may be selected from a compound of formula (la), (lb) and (Ic), or a pharmaceutically acceptable salt, solvate or prodrug thereof:
• Ri is selected from the group consisting of pyrazole, furan, tetrahydrofuran, tetrahydropyran, pyran, pyrrolidine, pyrrole, triazole, tetrazole, imidazole, pyridine, morpholine, piperazine, piperidine, substituted phenyl, phenylheteroaryl, phenylheterocyclyl, biphenyl, quinoline, isoquinoline, naphthyl, pyrazine and pyrimidine, all of which may be optionally substituted as appropriate.
• R-i is selected from the group consisting of:
• the compound of formula (I) may be selected from a compound of formula (II), or a pharmaceutically acceptable salt, solvate or prodrug thereof:
• R 2 is as previously defined for any embodiment of formula (I), (la), (lb) or (lc), or may be a fluorescent group; each incidence of R 6 is independently selected from the group consisting of hydrogen, halo, cyano, CrC 6 alkyl, C C 6 alkylamino, CrC 6 alkylhydroxy, C 3 - Ce cycloalkyi, alkylphenyl, phenyl, benzyl, C-i-Ce ester, C2-C6 alkenyl, C-i-Ce t fluoroalkyl and C C 6 alkoxy, each of which may be optionally substituted, or R 6 may be a fluorescent group.
• at least one of A, B, D and E is N (i.e. nitrogen).
• At least two of A, B, D and E are N.
• A, B, D and E are selected from N and C.
• A is C and at least two of B, D and E are N.
• A, B, D and E form a ring selected from a pyrazole, an imidazole, a triazole, and a tetrazole.
• A, B, D, and E form a ring selected from a pyrazole or an imidazole ring, most preferably a pyrazole ring.
• A, B, D and E and/or R 2 may comprise a selenocycle.
• the compound of formula (I) may be selected from a compound of formula (lla), or a pharmaceutically acceptable salt, solvate or prodrug thereof:
• A, B, D and E are selected from N and C and at least two of A, B, D, and E are N; each incidence of R 6 is independently selected from the group consisting of hydrogen, halide, cyano, C1-C6 alkyl, C1 -C6 alkylamino, C1 -C6 alkylhydroxy, C 3 -C 6 cycloalkyl, alkylphenyl, phenyl, benzyl, C C 6 ester, C 2 -C 6 alkenyl, C C 6 trifluoroalkyl and C1-C6 alkoxy, each of which may be optionally substituted.
• the compound of formula (I) may be selected from a compound of formula (lib), or a pharmaceutically acceptable salt, solvate or prodrug thereof:
• A, B, D and E are selected from N and C and at least two of A, B, D, and E are N;
• each incidence of R 6 is independently selected from the group consisting of hydrogen, halide, cyano, C C 6 alkyl, Ci -C 6 alkylamino, Ci -C 6 alkylhydroxy, C3-C6 cycloalkyl, alkylphenyl, phenyl, benzyl, C1-C6 ester, C2-C6 alkenyl, C1-C6 trifluoroalkyl and C C 6 alkoxy, each of which may be optionally substituted.
• the compound of formula (II), is selected from:
• R 40 is selected from H, alkyl and halo
• R 4 i is selected from H and alkyl
• each incidence of P is independently selected from C, 0 or S; and wherein each incidence of R 6 , when present, is independently selected from those groups defined for formula (II).
• R 6 moiety extending from the centre of each ring may represent a group bonded to the ring carbons or ring heteroatoms, as appropriate taking valency into consideration, or may not be present.
• R 6 is d-C6 alkyl or C-1 -C6 alkylhydroxy.
• R 6 may not be a tertiary alcohol substituent.
• the compound of the first aspect may be selected from a compound of formula (Ilia), (lllb) or (lllc), or a pharmaceutically acceptable salt, solvate or prodrug thereof:
• R 2 i is selected from H, alkyl, perhaloalkyl or hydroxylalkyl
• R22 is selected from H, alkyl, perhaloalkyl, C 3 -C 6 cycloalkyl, phenyl or benzyl
• R-I 8 is H or halogen
• R-I6 and Ri 7 are H or alkyl; or R-
• R-I 9 and R20 are H or alkyl; or R19 and R20, together with the carbon atoms to which they are attached, form a 5 or 6 membered ring, said ring being saturated, partially unsaturated or unsaturated, said ring optionally comprising one or two heteroatoms selected from N, 0 and S;
• R21 and R22 are not both H.
• R 6 , Ri 7 , R18, R19 and R 20 are not all H.
• R21 is selected from H, alkyl, perhaloalkyl or hydroxylalkyl; preferably C1-6 perhaloalkyl or hydroxylalkyl;
• R22 is selected from H, alkyl, perhaloalkyl, C3-C6 cycloalkyl, phenyl or benzyl;
• 7 together with the atoms to which they are attached, form a cyclopentyl ring;
• R-19 and R 2 o together with the atoms to which they are attached, form a cyclopentyl ring
• R-I 8 is H or halogen, preferably R-
• R 2 i and R22 are not both H.
• R21 is selected from H, alkyl, perhaloalkyi or hydroxylalkyl; preferably C1-6 perhaloalkyi or hydroxylalkyl;
• R22 is selected from H, alkyl, perhaloalkyi, C3-C6 cycloalkyi, phenyl and benzyl;
• R-I6 and R 2 o are C1-6 alkyl, preferably isopropyl
• R-17 and R 9 are H
• R-I 8 is H or halogen; preferably R-
• R 2 i and R22 are not both H.
• the compound of the first aspect may be selected from a compound of formula (IVa), (IVb) or (IVc), or a pharmaceutically acceptable salt, solvate or prodrug thereof:
• R 2 i and R22 are selected from H, alkyl, perhaloalkyi, hydroxylalkyl, C3-C6 cycloalkyi, phenyl and benzyl or R21 and R22, together with the carbon atoms to which they are attached, may form a cyclopentyl or a cyclohexyl ring;
• R-18 is H or halogen;
• R-16 and R 7 are H or alkyl; or R 6 and R 7 , together with the carbon atoms to which they are attached, form a 5 or 6 membered ring, said ring being saturated, partially unsaturated or unsaturated, said ring optionally comprising one or two heteroatoms selected from N, 0 and S;
• R-I 9 and R 20 are H or alkyl; or R 9 and R 2 o, together with the carbon atoms to which they are attached, form a 5 or 6 membered ring, said ring being saturated, partially unsaturated or unsaturated, said ring optionally comprising one or two heteroatoms selected from N, 0 and S;
• R 2 i and R 22 are not both H;
• 6 , R17, R18, R19 and R 20 are not all H.
• R 2 and R 22 are selected from H, alkyl, perhaloalkyi, hydroxylalkyi, C 3 -C 6 cycloalkyi, phenyl and benzyl; preferably the perhaloalkyi and hydroxylalkyi are Ci -6 perhaloalkyi and hydroxylalkyi;
• 7 together with the atoms to which they are attached, form a cyclopentyl ring
• R-19 and R 20 together with the atoms to which they are attached, form a cyclopentyl ring;
• R-18 is H or halogen; preferably R-
• R 2 and R 22 are not both H.
• R 2 i and R 22 are selected from H, alkyl, perhaloalkyi, hydroxylalkyi, C3-C6 cycloalkyi, phenyl and benzyl; preferably the perhaloalkyi and hydroxylalkyi are C1 -6 perhaloalkyi and hydroxylalkyi;
• R-16 and R 20 are Ci -6 alkyl, preferably isopropyl; R-17 and R-
• R 8 is H or halogen; preferably R 8 is H or CI;
• R 2 i and R22 are not both H.
• the compound of the first aspect may be selected from a compound of formula (Va), (Vb) or (Vc), or a pharmaceutically acceptable salt, solvate or prodrug thereof:
• R 2 i and R22 are selected from H, alkyl, perhaloalkyl, hydroxylalkyl, C3-C6 cycloalkyl, phenyl and benzyl;
• R-I 8 is H or halogen
• R-I 6 and Ri 7 are H or alkyl; or R-
• R-19 and R 2 o are H or alkyl; or R-19 and R 2 o, together with the carbon atoms to which they are attached, form a 5 or 6 membered ring, said ring being saturated, partially unsaturated or unsaturated, said ring optionally comprising one or two heteroatoms selected from N, 0 and S;
• R 2 i and R 22 are not both H;
• 6 , R17, R18, R19 and R 2 o are not all H.
• R21 and R22 are selected from H, alkyl, perhaloalkyi, hydroxylalkyi, C 3 -C 6 cycloalkyi, phenyl and benzyl; preferably the perhaloalkyi and hydroxylalkyi are Ci-6 perhaloalkyi and hydroxylalkyi;
• R-19 and R 2 o together with the atoms to which they are attached, form a cyclopentyl ring
• R-I 8 is H or halogen; preferably R-
• R 2 i and R 22 are not both H.
• R 2 i and R 22 are selected from H, alkyl, perhaloalkyi, hydroxylalkyi, C3-C6 cycloalkyi, phenyl and benzyl; preferably the perhaloalkyi and hydroxylalkyi are C1-6 perhaloalkyi and hydroxylalkyi;
• R-I 6 and R 20 are Ci -6 alkyl, preferably isopropyl;
• R-I 8 is H or halogen; preferably R 8 is H or CI; and
• R 2 i and R 22 are not both H.
• the compound of the first aspect may be selected from a compound of formula (Via) or (VIb), or a pharmaceutically acceptable salt, solvate or prodrug thereof:
• Formula (Via) Formula (Vlb) wherein, R22 is selected from alkyl, perhaloalkyl, hydroxylalkyl, C3-C6 cycloalkyl, phenyl and benzyl;
• R-18 is H or halogen
• R-16 and R 7 are H or alkyl; or R 6 and R 7 , together with the carbon atoms to which they are attached, form a 5 or 6 membered ring, said ring being saturated, partially unsaturated or unsaturated, said ring optionally comprising one or two heteroatoms selected from N, 0 and S;
• R-19 and R 20 are H or alkyl; or R 9 and R 2 o, together with the carbon atoms to which they are attached, form a 5 or 6 membered ring, said ring being saturated, partially unsaturated or unsaturated, said ring optionally comprising one or two heteroatoms selected from N, 0 and S; and
• R 6 , Ri 7 , R18, R19 and R 20 are not all H.
• R22 is selected from alkyl, perhaloalkyl, hydroxylalkyl, C3-C6 cycloalkyl, phenyl and benzyl; preferably the perhaloalkyl and hydroxylalkyl are Ci -6 perhaloalkyl and hydroxylalkyl;
• R 6 and R 7 together with the atoms to which they are attached, form a cyclopentyl ring
• R-19 and R 2 o together with the atoms to which they are attached, form a cyclopentyl ring; and R-18 is H or halogen; preferably R-
• R22 is selected from alkyl, perhaloalkyl, hydroxylalkyl, C 3 -C 6 cycloalkyl, phenyl and benzyl; preferably the perhaloalkyl and hydroxylalkyl are C1-6 perhaloalkyl and hydroxylalkyl;
• R-I 6 and R 2 o are C1-6 alkyl, preferably isopropyl
• R-17 and R 9 are H;
• R-18 is H or halogen; preferably R-
• the compound of the first aspect may be selected from a compound of formula (VII), or a pharmaceutically acceptable salt, solvate or prodrug thereof:
• each incidence of R 30 is independently selected from alkyl, perhaloalkyl, hydroxylalkyl, C 3 -C 6 cycloalkyl, and alkylam ino;
• R-18 is H or halogen
• R-I 6 and R 7 are H or alkyl; or R 6 and R 7 , together with the carbon atoms to which they are attached, form a 5 or 6 membered ring, said ring being saturated, partially unsaturated or unsaturated, said ring optionally comprising one or two heteroatoms selected from N, 0 and S;
• R-19 and R 20 are H or alkyl; or R 9 and R 2 o, together with the carbon atoms to which they are attached, form a 5 or 6 membered ring, said ring being saturated, partially unsaturated or unsaturated, said ring optionally comprising one or two heteroatoms selected from N, 0 and S;
• R 6 , R-17, R18, R19 and R 20 are not all H; and provided that when Q is 0 and R-
• each incidence of R 30 is independently selected from alkyl, perhaloalkyl, hydroxylalkyl, C3-C6 cycloalkyl, and alkylamino; preferably C1-6 alkyl, perhaloalkyl, hydroxylalkyl, and alkylamino;
• R-I 8 is H or halogen; preferably R-
• each incidence of R 30 is independently selected from alkyl, perhaloalkyl, hydroxylalkyl, C 3 -C 6 cycloalkyl, and alkylamino; preferably Ci -6 alkyl, perhaloalkyl, hydroxylalkyl, and alkylamino;
• R-I 6 and R 20 are Ci -6 alkyl, preferably isopropyl;
• R-17 and R-19 are H; and R-18 is H or halogen; preferably R-
• the compounds of the first aspect, and particularly those of formulae (II) to (VI), provide a range of unexpected benefits over those sulfonylureas of the prior art, which benefits may be selected from: Improved microsomal stability; Improved permeability; Reduced Pgp liability; Reduced plasma protein binding; Increased half-life; Improved oral bioavailability; Improved AUC; Improved Cmax; Reduced Cyp inhibition; Improved inhibition of activation of the NLRP3 inflammasome; and Improved solubility.
• the solubility, and certain other, improvements may be seen particularly in an aqueous environment.
• the compounds of the first aspect offer improved pharmacokinetic characteristics.
• CRID3 a known sulfonylurea, has a half life of 3.2 hours (mouse) which may lead to substantial trough levels from QD or BD dosing when the t1/2 is extrapolated to man.
• the compounds of the first aspect may differ in, for example, their protein binding, metabolism and oral availability.
• the compounds of of the first aspect have a tPSA of less than 90 A 2 .
• the compounds of the first aspect have a tPSA of less than 90 A 2 and a molecular weight of less than 405.
• the absence of a tertiary alcohol group in some embodiments, increases plasma concentration and aids in decreasing both MW and polar surface area thereby giving an overall improvement in blood brain barrier penetration.
• one or more hydrogens of the substituents or optional substitutions thereupon may be deuterated.
• Deuterated analogues of the compounds of the invention may exhibit increased metabolic stability due to the kinetic isotope effect.
• the compound of the first aspect is selected from the group consisting of:
• the compounds of the first aspect may exhibit improved properties compared to known anti-diabetes drugs.
• examples of such compounds may include those below:
• the compound is an inhibitor of activation of the NLRP3 inflammasome.
• the present invention provides for sulfonyl urea and related drugs exhibiting significantly lower NLRP3 IC50 values in cell based assay using HMDM (see experimental section for protocols) than the above comparator compounds.
• HMDM cell based assay using HMDM
• one or more of the compounds of the first aspect may be useful as photoswitchable compounds which may be applied in a range of uses including but not limited to insulin release.
• Such compounds may, in one embodiment, be selected from the group consisting of:
• R 2 is as defined in any one or more of the embodiments of compounds of formula (I) to (VII) described previously.
• one or more compounds of the first aspect may be appropriate for use as probes, such as photoaffinity probes, or as reactive intermediates which can be modified either directly or by means of a linking moiety to give biotinylated, fluorescent or photoaffinity probes including, but not limited to, those shown below:
• R 2 is as defined in any one or more of the embodiments described for formula (I) to (VII).
• probes or reactive intermediates may be selected from those below:
• the compounds of the first aspect may be modified or derivatised by means well understood in the art to allow linkage to a molecule such as biotin, or a fluorescent group or photoaffinity label, as shown with certain of the compounds above.
• the compound of formula (I) or (II) does not comprise a structure selected from the groups below shown attached to the sulfonyl moiety (i.e. as an Ri group):
• the compound of the first aspect including any compound of formula (I) to (VII)
• Ri is not one of 2,4-disubstituted furan, 2,4-disubstituted thiophene, 2,5-disubstituted furan and 2,5-disubstituted thiophene.
• the compound of the first aspect including any compound of formula (I) to (VII)
• has J as S, W as O and R-i is selected from substituted triazole, thiadiazole, 4-substituted pyridine and 1 ,2- disubstituted imidazole then R 2 is not unsubstituted phenyl, 2- or 4-chlorophenyl or 3,4- substituted phenyl, substituted with one or more of halo, trifluoromethyl, nitro or thiomethyl.
• R-i is selected from substituted triazole, thiadiazole, benzothiazole and substituted pyrimidine then R 2 is not thiophene, 3-chlorophenyl, 4-ethoxyphenyl, substituted benzimidazole or substituted benzothiazole.
• R 2 is not 2,6-diisopropylphenyl.
• R 2 is not 3- or 3,4- halo, methyl, ethyl or trifluoromethyl substituted phenyl.
• the carbon atom of R 2 which is directly bonded to the urea nitrogen is an aryl, heteroaryl or heterocyclic ring carbon.
• the compound of the first aspect including any compound of formula (I) to (VII)
• R 2 is a substituted phenyl and Ri is a pyrazole then the Ri pyrazole is not substituted with an aryl or heteroaryl group.
• the compound of the first aspect including any compound of formula (I) to (VII)
• the pyrazole is not fused in positions 1 and 5 with a 6-membered heterocycle to form a pyrazolopyrimidine derivative.
• the compound of the first aspect including any compound of formula (I) to (VII) is not a compound selected from the group consisting of:
• prodrugs are compounds which, when administered to a mammal, are converted in whole or in part to a compound of the invention.
• the prodrugs are pharmacologically inert chemical derivatives that can be converted in vivo to the active drug molecules to exert a therapeutic effect. Any of the compounds described herein can be administered as a prodrug to increase the activity, bioavailability, or stability of the compound or to otherwise alter the properties of the compound.
• Typical examples of prodrugs include compounds that have biologically labile protecting groups on a functional moiety of the active compound.
• Prodrugs include, but are not limited to, compounds that can be oxidized, reduced, aminated, deaminated, hydroxylated, dehydroxylated, hydrolyzed, dehydrolyzed, alkylated, dealkylated, acylated, deacylated, phosphorylated, and/or dephosphorylated to produce the active compound.
• prodrug ligands are known.
• alkylation, acylation, or other lipophilic modification of one or more heteroatoms of the compound, such as a free amine or carboxylic acid residue may reduce polarity and allow for the compound's passage into cells.
• substituent groups that can replace one or more hydrogen atoms on a free amine and/or carboxylic acid moiety include, but are not limited to, the following: aryl; steroids; carbohydrates (including sugars); 1 ,2-diacylglycerol; alcohols; acyl (including lower acyl); alkyl (including lower alkyl); sulfonate ester (including alkyl or arylalkyl sulfonyl, such as methanesulfonyl and benzyl, wherein the phenyl group is optionally substituted with one or more substituents as provided in the definition of an aryl given herein); optionally substituted arylsulfonyl; lipids (including phospholipids); phosphotidylcholine; phosphocholine; amino acid residues or derivatives; amino acid acyl residues or derivatives; peptides; cholesterols; or other pharmaceutically acceptable leaving groups which, when administered in vivo, provide the free amine
• any of these moieties can be used in combination with the disclosed active agents to achieve a desired effect.
• compounds with one or more chiral centers are provided. While racemic mixtures of compounds of the invention may be active, selective, and bioavailable, isolated isomers may be of interest as well.
• the compounds of the first aspect may contain chiral centers, which may be either of the (R) or (S) configuration, or which may comprise a mixture thereof. Accordingly, the present invention also includes stereoisomers of the compounds described herein, where applicable, either individually or admixed in any proportions. Stereoisomers may include, but are not limited to, enantiomers, diastereomers, racemic mixtures, and combinations thereof. Such stereoisomers can be prepared and separated using conventional techniques, either by reacting enantiomeric starting materials, or by separating isomers of compounds and prodrugs of the present invention. Isomers may include geometric isomers.
• geometric isomers include, but are not limited to, cis isomers or trans isomers across a double bond.
• Other isomers are contemplated among the compounds of the present invention.
• the isomers may be used either in pure form or in admixture with other isomers of the compounds described herein.
• optical isomers of the compounds according to the present invention include the following: i) physical separation of crystals whereby macroscopic crystals of the individual enantiomers are manually separated. This technique may particularly be used when crystals of the separate enantiomers exist (i.e., the material is a conglomerate), and the crystals are visually distinct;
• enzymatic asymmetric synthesis a synthetic technique whereby at least one step of the synthesis uses an enzymatic reaction to obtain an enantiomerically pure or enriched synthetic precursor of the desired enantiomer;
• kinetic resolutions comprising partial or complete resolution of a racemate (or of a further resolution of a partially resolved compound) by virtue of unequal reaction rates of the enantiomers with a chiral, non-racemic reagent or catalyst under kinetic conditions; ix) enantiospecific synthesis from non-racemic precursors whereby the desired enantiomer is obtained from non-chiral starting materials and where the stereochemical integrity is not or is only minimally compromised over the course of the synthesis;
• x) chiral liquid chromatography whereby the enantiomers of a racemate are separated in a liquid mobile phase by virtue of their differing interactions with a stationary phase.
• the stationary phase can be made of chiral material or the mobile phase can contain an additional chiral material to provoke the differing interactions;
• xiii) transport across chiral membranes whereby a racemate is placed in contact with a thin membrane barrier.
• the barrier typically separates two miscible fluids, one containing the racemate, and a driving force such as concentration or pressure differential causes preferential transport across the membrane barrier. Separation occurs as a result of the non-racemic chiral nature of the membrane which allows only one enantiomer of the racemate to pass through.
• the compound optionally may be provided in a composition that is enantiomerically enriched, such as a mixture of enantiomers in which one enantiomer is present in excess, in particular, to the extent of 95% or more, 96% or more, 97% or more, 98% or more, or 99% or more, including 100%.
• a composition that is enantiomerically enriched, such as a mixture of enantiomers in which one enantiomer is present in excess, in particular, to the extent of 95% or more, 96% or more, 97% or more, 98% or more, or 99% or more, including 100%.
• the terms (R), (S), (R,R), (S,S), (R,S) and (S,R) as used herein mean that the composition contains a greater proportion of the named isomer of the compound in relation to other isomers.
• these terms indicate that the composition contains at least 90% by weight of the named isomer and 10% by weight or less of the one or more other isomers; or more preferably about 95% by weight of the named isomer and 5% or less of the one or more other isomers.
• the composition may contain at least 99% by weight of the named isomer and 1 % or less by weight of the one or more other isomers, or may contain 100% by weight of the named isomer and 0% by weight of the one of more other isomers. These percentages are based on the total amount of the compound of the present invention present in the composition.
• the compounds of the first aspect may be utilized per se or in the form of a pharmaceutically acceptable ester, amide, salt, solvate, prodrug, or isomer, as appropriate.
• the compound may be provided as a pharmaceutically acceptable salt.
• a salt of the drug compound should be both pharmacologically and pharmaceutically acceptable, but non- pharmaceutically acceptable salts may conveniently be used to prepare the free active compound or pharmaceutically acceptable salts thereof and are not excluded from the scope of this invention.
• Such pharmacologically and pharmaceutically acceptable salts can be prepared by reaction of the drug with an organic or inorganic acid, using standard methods detailed in the literature.
• Examples of pharmaceutically acceptable salts of the compounds useful according to the invention include acid addition salts. Salts of non- pharmaceutically acceptable acids, however, may be useful, for example, in the preparation and purification of the compounds.
• Suitable acid addition salts according to the present invention include organic and inorganic acids. Preferred salts include those formed from hydrochloric, hydrobromic, sulfuric, phosphoric, citric, tartaric, lactic, pyruvic, acetic, succinic, fumaric, maleic, oxaloacetic, methanesulfonic, ethanesulfonic, p-toluenesulfonic, benzenesulfonic, and isethionic acids.
• compositions include propionic acid, glycolic acid, oxalic acid, malic acid, malonic acid, benzoic acid, cinnamic acid, mandelic acid, salicylic acid, and the like.
• pharmaceutically acceptable salts include, but are not limited to, sulfates, pyrosulfates, bisulfates, sulfites, bisulfites, phosphates, monohydrogenphosphates, dihydrogenphosphates, metaphosphates, pyrophosphates, chlorides, bromides, iodides, acetates, propionates, decanoates, caprylates, acrylates, formates, isobutyrates, caproates, heptanoates, propiolates, oxalates, malonates, succinates, suberates, sebacates, fumarates, maleates, butyne-1 ,4-dioates, hexyne-1 ,6-dioates
• An acid addition salt may be reconverted to the free base by treatment with a suitable base.
• Preparation of basic salts of acid moieties which may be present on a compound or prodrug useful according to the present invention may be prepared in a similar manner using a pharmaceutically acceptable base, such as sodium hydroxide, potassium hydroxide, ammonium hydroxide, calcium hydroxide, triethylamine, or the like.
• Esters of the active agent compounds according to the present invention may be prepared through functionalization of hydroxyl and/or carboxyl groups that may be present within the molecular structure of the compound.
• Amides and prodrugs may also be prepared using techniques known to those skilled in the art. For example, amides may be prepared from esters, using suitable amine reactants, or they may be prepared from an anhydride or an acid chloride by reaction with ammonia or a lower alkyl amine.
• esters and amides of compounds of the invention can be made by reaction with a carbonylating agent ⁇ e.g., ethyl formate, acetic anhydride, methoxyacetyl chloride, benzoyl chloride, methyl isocyanate, ethyl chloroformate, methanesulfonyl chloride) and a suitable base ⁇ e.g., 4-dimethylaminopyridine, pyridine, triethylamine, potassium carbonate) in a suitable organic solvent (e.g., tetrahydrofuran, acetone, methanol, pyridine, ⁇ , ⁇ -dimethylformamide) at a temperature of 0 °C to 60 °C.
• a carbonylating agent e.g., ethyl formate, acetic anhydride, methoxyacetyl chloride, benzoyl chloride, methyl isocyanate, ethyl chloroformate, me
• Prodrugs are typically prepared by covalent attachment of a moiety, which results in a compound that is therapeutically inactive until modified by an individual's metabolic system.
• Examples of pharmaceutically acceptable solvates include, but are not limited to, compounds according to the invention in combination with water, isopropanol, ethanol, methanol, DMSO, ethyl acetate, acetic acid, or ethanolamine.
• the compounds used in the methods of the invention may exist in different forms.
• the compounds may exist in stable and metastable crystalline forms and isotropic and amorphous forms, all of which are intended to be within the scope of the present invention.
• a compound useful as an active agent according to the invention is a base
• the desired salt may be prepared by any suitable method known to the art, including treatment of the free base with an inorganic acid, such as hydrochloric acid, hydrobromic acid, sulfuric acid, nitric acid, phosphoric acid and the like, or with an organic acid, such as acetic acid, maleic acid, succinic acid, mandelic acid, fumaric acid, malonic acid, pyruvic acid, oxalic acid, glycolic acid, salicylic acid, pyranosidyl acids such as glucuronic acid and galacturonic acid, alpha-hydroxy acids such as citric acid and tartaric acid, amino acids such as aspartic acid and glutamic acid, aromatic acids such as benzoic acid and cinnamic acid, sulfonic acids such a p-toluenesulfonic acid or ethanesulfonic acid, or the like.
• an inorganic acid such as hydrochlor
• the desired salt may be prepared by any suitable method known in the art, including treatment of the free acid with an inorganic or organic base, such as an am ine (primary, secondary or tertiary), an alkali metal or alkaline earth metal hydroxide or the like.
• suitable salts include organic salts derived from amino acids such as glycine and arginine, ammonia, primary, secondary and tertiary amines, and cyclic amines such as piperidine, morpholine and piperazine, and inorganic salts derived from sodium , calcium, potassium, magnesium, manganese, iron, copper, zinc, aluminum and lithium.
• a pharmaceutical composition comprising a compound of formula (I) to (VII), or a pharmaceutically acceptable salt, solvate or prodrug thereof, and a pharmaceutically acceptable carrier, diluent and/or excipient.
• the pharmaceutically acceptable carrier, diluent and/or excipient may be or include one or more of diluents, solvents, pH buffers, binders, fillers, emulsifiers, disintegrants, polymers, lubricants, oils, fats, waxes, coatings, viscosity-modifying agents, glidants and the like.
• the salt forms of the compounds of the invention may be especially useful due to their improved solubility.
• the pharmaceutical composition includes a cyclodextrin.
• the cyclodextrin may be selected from alpha, beta or gamma cyclodextrins.
• the cyclodextrin is selected from a methyl cyclodextrin, a hydroxypropyl cyclodextrin and a sulfobutylether cyclodextrin.
• Cyclodextrin formulations such as for example, one or more compounds of the invention with hydroxypropyl beta cyclodextrin or methyl beta cyclodextrin, may have uses in cholesterol sequestration/cholesterol lowering or via NLRP3 inhibition for Non-alcoholic steatohepatitis (NASH), alcoholic liver disease, atherosclerosis and also in Alzheimer's Disease (AD).
• NASH Non-alcoholic steatohepatitis
• AD Alzheimer's Disease
• Diluents may include one or more of microcrystalline cellulose, lactose, mannitoi, calcium phosphate, calcium sulfate, kaolin, dry starch, powdered sugar, and the like.
• Binders may include one or more of povidone, starch, stearic acid, gums, hydroxypropylmethyl cellulose and the like.
• Disintegrants may include one or more of starch, croscarmellose sodium, crospovidone, sodium starch glycolate and the like.
• Solvents may include one or more of ethanoi, methanol, isopropanoi, chloroform, acetone, methylethyl ketone, methylene chloride, water and the like.
• Lubricants may include one or more of magnesium stearate, zinc stearate, calcium stearate, stearic acid, sodium stearyl fumarate, hydrogenated vegetable oil, glyceryl behenate and the like.
• a glidant may be one or more of colloidal silicon dioxide, talc or cornstarch and the like.
• Buffers may include phosphate buffers, borate buffers and carbonate buffers, although without limitation thereto.
• Fillers may include one or more gels inclusive of gelatin, starch and synthetic polymer gels, although without limitation thereto.
• Coatings may comprise one or more of film formers, solvents, plasticizers and the like.
• Suitable film formers may be one or more of hydroxypropyl methyl cellulose, methyl hydroxyethyl cellulose, ethyl cellulose, hydroxypropyl cellulose, povidone, sodium carboxymethyl cellulose, polyethylene glycol, acrylates and the like.
• Suitable solvents may be one or more of water, ethanoi, methanol, isopropanoi, chloroform, acetone, methylethyl ketone, methylene chloride and the like.
• Plasticizers may be one or more of propylene glycol, castor oil, glycerin, polyethylene glycol, poiysorbates, and the like.
• composition may be in the form of a tablet, capsule, caplet, powder, an injectable liquid, a suppository, a slow release formulation, an osmotic pump formulation or any other form that is effective and safe for administration.
• the pharmaceutical composition is for the treatment or prevention of a disease, disorder or condition in a mammal.
• a third aspect of the invention resides in a method of treatment or prevention of a disease, disorder or condition including the step of administering an effective amount of a compound of formula (I) to (VII), or a pharmaceutically effective salt, solvate or prodrug thereof, or the pharmaceutical composition of the second aspect to thereby treat or prevent the disease disorder or condition.
• a fourth aspect of the invention provides for a compound of formula (I) to (VII), or a pharmaceutically effective salt, solvate or prodrug thereof, or the pharmaceutical composition of the second aspect for use in the treatment or prevention of a disease, disorder or condition.
• a fifth aspect of the invention provides for use of a compound of formula (I) to (VII), or a pharmaceutically effective salt, solvate or prodrug thereof, in the manufacture of a medicament for the treatment or prevention of a disease, disorder or condition.
• administering or “administration”, and the like, describe the introduction of the compound or composition to a mammal such as by a particular route or vehicle.
• Routes of administration may include topical, parenteral and enteral which include oral, buccal, sub-lingual, nasal, anal, gastrointestinal, subcutaneous, intramuscular and intradermal routes of administration, although without limitation thereto.
• treat administration of the compound or composition to a subject to at least ameliorate, reduce or suppress existing signs or symptoms of the disease, disorder or condition experienced by the subject.
• prevent prophylactically administering the formulation to a subject who does not exhibit signs or symptoms of a disease disorder or condition, but who is expected or anticipated to likely exhibit such signs or symptoms in the absence of prevention.
• Preventative treatment may at least lessen or partly ameliorate expected symptoms or signs.
• ' effective amount refers to the administration of an amount of the relevant compound or composition sufficient to prevent the occurrence of symptoms of the condition being treated, or to bring about a halt in the worsening of symptoms or to treat and alleviate or at least reduce the severity of the symptoms.
• the effective amount will vary in a manner which would be understood by a person of skill in the art with patient age, sex, weight etc. An appropriate dosage or dosage regime can be ascertained through routine trial.
• the terms "subject” or “individual” or “patient” may refer to any subject, particularly a vertebrate subject, and even more particularly a mammalian subject, for whom therapy is desired.
• Suitable vertebrate animals include, but are not restricted to, primates, avians, livestock animals (e.g., sheep, cows, horses, donkeys, pigs), laboratory test animals (e.g., rabbits, mice, rats, guinea pigs, hamsters), companion animals (e.g., cats, dogs) and captive wild animals (e.g., foxes, deer, dingoes).
• a preferred subject is a human in need of treatment for a disease, disorder or condition as described herein. However, it will be understood that the aforementioned terms do not imply that symptoms are necessarily present.
• the disease, disorder or condition is one which is responsive to inhibition of activation of the NLRP3 inflammasome.
• the compound of the first aspect, or pharmaceutically effective salt, solvate or prodrug thereof is a specific inhibitor of NLRP3.
• the disease, disorder or condition is responsive to modulation of one or more of IL- ⁇ ⁇ , IL-17, IL-18, IL-1 , IL-37, IL- 33 and Th17 cells.
• the modulation is inhibition of one or more of IL- 1 ⁇ , IL-17, IL-18, IL-1 a, IL-37, and IL-33.
• the modulation of Th17 cells is by inhibition of production and/or secretion of IL-17.
• the disease, disorder or condition is a disease, disorder or condition of the immune system, the cardiovascular system, the endocrine system, the gastrintestinal tract, the renal system, the respiratory system, the central nervous system, is a cancer or other malignancy and/or is caused by or associated with a pathogen.
• any particular disease, disorder or condition may be categorized according to more than one of the above general embodiments.
• a non-limiting example is Type I diabetes which is an autoimmune disease and a disease of the endocrine system.
• the disease, disorder or condition is of the immune system.
• the disease disorder or condition is an inflammatory disease disorder or condition or an autoimmune disease disorder or condition.
• the disease, disorder or condition is of the skin.
• the disease, disorder or condition is of the cardiovascular system.
• the disease, disorder or condition is a cancer, tumour or other malignancy.
• cancers tumours and malignancies refer to diseases disorders or conditions, or to cells or tissues associated with the diseases, disorders or conditions, characterized by aberrant or abnormal cell proliferation, differentiation and/or migration often accompanied by an aberrant or abnormal molecular phenotype that includes one or more genetic mutations or other genetic changes associated with oncogenesis, expression of tumour markers, loss of tumour suppressor expression or activity and/or aberrant or abnormal cell surface marker expression.
• cancers, tumours and malignancies may include sarcomas, lymphomas, leukemias, solid tumours, blastomas, gliomas, carcinomas, melanomas and metastatic cancers, although without limitation thereto.
• sarcomas lymphomas, leukemias, solid tumours, blastomas, gliomas, carcinomas, melanomas and metastatic cancers, although without limitation thereto.
• a more comprehensive listing of cancers tumours and malignancies may be found at the National Cancer Institutes website http://www.cancer.gov/cancertopics/types/alphalist.
• the disease, disorder or condition is of the renal system .
• the disease, disorder or condition is of the gastro-intestinal tract. [00190] In one embodiment, the disease, disorder or condition is of the respiratory system.
• the disease, disorder or condition is of the endocrine system.
• the disease, disorder or condition is of the central nervous system (CNS).
• CNS central nervous system
• the disease, disorder or condition is caused by, or is associated with, a pathogen.
• the pathogen may be a virus, a bacterium, a protist, a worm or a fungus or any other organism capable of infecting a mammal, although without limitation thereto.
• Non-limiting examples of viruses include influenza virus, cytomegalovirus, Epstein Barr Virus, human immunodeficiency virus (HIV), alphavirus such as Chikungunya and Ross River virus, flaviviruses such as Dengue virus, Zika virus and papillomavirus, although without limitation thereto.
• HIV human immunodeficiency virus
• alphavirus such as Chikungunya and Ross River virus
• flaviviruses such as Dengue virus, Zika virus and papillomavirus, although without limitation thereto.
• Non-limiting examples of pathogenic bacteria include
• Staphylococcus aureus Helicobacter pylori, Bacillus anthracis, Bordatella pertussis, Corynebacterium diptheriae, Clostridium tetani, Clostridium botulinum, Streptococcus pneumoniae, Streptococcus pyogenes, Listeria monocytogenes, Hemophilus influenzae, Pasteureiia multicida, Shigella dysenteriae, Mycobacterium tuberculosis, Mycobacterium leprae, Mycoplasma pneumoniae, Mycoplasma hominis, Neisseria meningitidis, Neisseria gonorrhoeae, Rickettsia rickettsii, Legionella pneumophila, Klebsiella pneumoniae, Pseudomonas aeruginosa, Propionibacterium acnes, Treponema pallidum, Chlamydia trachomatis, Vibrio
• Non-limiting examples of worms include helminths inclusive of schistisimes, roundworms, tapeworms and flukes, although without limitation thereto.
• Non-limiting examples of fungi include Candida and Aspergillus species, although without limitation thereto.
• the disease, disorder or condition is selected from the group consisting of constitutive inflammation including the cryopyrin-associated periodic syndromes (CAPS): Muckle-Wells syndrome (MWS), familial cold autoinflammatory syndrome (FCAS) and neonatal-onset multisystem inflammatory disease (NOMID); including autoinflammatory diseases: familial Mediterranean fever (FMF), TNF receptor associated periodic syndrome (TRAPS), mevalonate kinase deficiency (MKD), hyperimmunoglobulinemia D and periodic fever syndrome (H IDS), deficiency of interleukin 1 receptor (DIRA) antagonist, Majeed syndrome, pyogenic arthritis, pyoderma gangrenosum and acne (PAPA), haploinsufficiency of A20 (HA20), pediatric granulomatous arthritis (PGA), PLCG2 -associated antibody deficiency and immune dysregulation (PLAID), PLCG2-associated autoinflammation, antibody deficiency and immune dysregulation (APLAID), sideroblastic anemia with
• the disease, disorder or condition being treated is NASH.
• NLRP3 inflammasome activation is central to inflammatory recruitment in NASH, and inhibition of NLRP3 may both prevent and reverse liver fibrosis.
• Compounds of the present invention by interrupting the function of NLRP3 inflammasomes in liver tissue, can cause histological reductions in liver inflammation, decreased recruitment of macrophages and neutrophils, and suppression of NF- ⁇ activation. Inhibition of the NLRP3 can reduce hepatic expression of pro-IL-1 ⁇ and normalized hepatic and circulating I L- p , IL-6 and MCP-1 levels thereby assisting in treatment of the disease.
• the disease, disorder or condition being treated is severe steroid resistant (SSR) asthma.
• SSR severe steroid resistant
• Respiratory infections induce an NLRP3 inflammasome/caspase-l/IL- ⁇ signaling axis in the lungs that promotes SSR asthma.
• the NLRP3 inflammasome recruits, and activates, pro-caspase-1 to induce IL-1 ⁇ responses.
• NLRP3 inflammasome-induced IL-1 ⁇ responses are therefore important in the control of infections, however, excessive activation results in aberrant inflammation and has been associated with the pathogenesis of SSR asthma and COPD.
• the administration of compounds of the first aspect that target specific disease processes, are more therapeutically attractive than non- specifically inhibiting inflammatory responses with steroids or IL-1 ⁇ .
• Targeting the NLRP3 inflammasome/caspase-1/IL-1 ⁇ signaling axis with the compounds of the first aspect may therefore be useful in the treatment of SSR asthma and other steroid-resistant inflammatory conditions.
• the disease, disorder or condition being treated is Parkinson's disease.
• Parkinson's is the most common neurodegenerative movement disorder and is characterized by a selective loss of dopaminergic neurons, accompanied by the accumulation of mis-folded a-synuclein (Syn) into Lewy bodies that are pathological hallmarks of the disease.
• Syn mis-folded a-synuclein
• Chronic microglial neuroinflammation is evident early in the disease, and has been proposed to drive pathology.
• a central role for microglial NLRP3 is postulated in Parkinson's progression.
• the NLRP3 inflammasome is activated by fibrillar Syn via a Syk kinase dependent mechanism, and also occurs in the absence of Syn pathology at the early stages of dopaminergic degeneration, and drives neuronal loss.
• the compounds of the first aspect may block NLRP3 inflammasome activation by fibrillar Syn or mitochondrial dysfunction and thereby confer effective neuroprotection of the nigrostriatal dopaminergic system and assist with treatment of Parkinson's.
• a method of diagnosing a disease, disorder or condition in a mammal including the step of administering a labelled compound of formula (I) to (VII), or a pharmaceutically effective salt, solvate or prodrug thereof, to the mammal or to a biological sample obtained from the mammal to facilitate diagnosis of the disease disorder or condition in the mammal.
• Inflammasome activation in particular that of the NLRP3 inflammasome, is known to drive initiation, progression and chronic development of a vast number of inflammatory diseases.
• the sulfonylureas and related compounds of the first aspect are potent and specific direct inhibitors of NLRP3. Accordingly, a chemical probe specific for NLRP3, which is present in immune cells during inflammation has potential utility in diagnosing inflammatory and other related diseases.
• An NRLP3 activation probe comprising a compound of the first aspect could act as an effective surrogate biomarker of inflammatory diease for ex vivo (blood) or in vivo (MRI, PET etc.) diagnostics.
• the use of the compounds of the first aspect in diagnosing inflammatory and other related diseases may be achieved by near infrared fluorescent imaging and ex vivo characterisation of immune cells by degree of inhibition of IL-1 beta, pro-caspase 1 cleavage and IL-18 levels.
• peripheral blood monocytes PMBCs
• macrophages macrophages
• dendritic cells CD4 + T cells
• Th17 cells Th1 cells
• Th2 cells are relevant.
• PET positron emission tomography
• Typical isotopes include 11 C, 13 N, 15 0, 18 F, 64 Cu, 62 Cu, 124 l, 76 Br, 82 Rb and 68 Ga, with 18 F being the most clinically utilized.
• diagnostic probe for radioimaging, PET and the like whereby the intensity, location and temporal accretion of the diagnostic probe is able to identify the degree and/or the location of immune cells with activated NLRP3 as a surrogate biomarker of the patient's inflammatory state, and site of inflammation within the body. They will also be useful for application to biological samples removed from the body i.e. in vitro diagnosis.
• a seventh aspect of the invention resides in a method of modulating the activity of a biological target comprising the step of exposing the biological target to a compound of formula (I) to (VII), or a pharmaceutically effective salt, solvate or prodrug thereof.
• the biological target may be selected from the group consisting of NLRP3 inflammasome, IL-1 ⁇ , IL-17, IL-18, IL-1 a, IL-37, IL-33 and Th17 cells.
• a biological sample may include cells, tissues, fluids, molecules or other biological materials obtained, or obtainable, from a mammal.
• Non-limiting examples include urine, blood and fractions thereof such as serum, plasma, lymphocytes and erythrocytes, cerebrospinal fluid, PAP smears, nasal and ocular secretions, amniotic fluid, faeces, semen, tissue and/or organ biopsies and nucleic acid (e.g. DNA, RNA) or protein samples, although without limitation thereto.
• the R2 acid chloride intermediate was dissolved in acetone and added drop- wise to a solution of sodium azide (1.5 eq) in a watenacetone (50:50) solution at 0 °C. Iced water was added to precipitate the resulting R2 acylazide intermediate which was dissolved in toluene and dried (MgS04) prior to adding the solution in a drop-wise fashion to anhydrous toluene at reflux while maintaining a constant flow of inert gas. The reaction was heated until completion, typically 2 h, to give the R2 isocyanate.
• R1 sulfonamide intermediate (1 eq.) was dissolved in anhydrous THF or anhydrous methanol and treated with NaH (1 eq.) under reduced pressure. Once effervescence ceased the R2 isocyanate intermediate was added and the reaction mixture was stirred at ambient temperature overnight.
• Ethyl furan-2-carboxylate (9.0 g, 64.3 mmol) was dissolved in dichloromethane (200 mL) and chlorosulfonic acid (7.5 g, 64.3 mmol) added. The reaction was stirred at ambient temperature for 6 hours, or until completion, then pyridine (5.6 g, 70.7 mmol) and PCI5 (14.7 g, 70.7 mmol) were added portionwise. The reaction mixture was stirred at ambient temperature for 16 hours then quenched using ice-water and stirred for 30 mins. The mixture was extracted using DCM and the combined organics washed with water, brine, dried (Na 2 S0 4 ) and concentrated in vacuo.
• Methyl 2-methyl-5-sulfamoylfuran-3-carboxylate can be prepared by modification of procedures used to synthesise ethyl 2-methyl-5-sulfamoylfuran- 3-carboxylate but using methyl 2-methylfuran-3-carboxylate as starting material in place of ethyl 2-methylfuran-3-carboxylate.
• Methyl 2-methyl-5-sulfamoylfuran-3-carboxylate (0.7 g, 3.2 mmol) in anhydrous THF (20 mL) at -10 °C was treated with c/ 3 -methyl magnesium iodide solution (1.0 M in Et 2 0, 26 mL) drop-wise over 10 minutes with vigorous stirring. The solution was then stirred at ambient temperature for 12 h then cooled to 0 °C and treated drop-wise with a solution of sat. ammonium chloride. The aqueous solution was extracted using EtOAc (2 x 25 mL), the combined organics washed with brine (25 mL), dried (Na 2 S0 4 ) and concentrated in vacuo.
• reaction mixture was diluted with water and extracted with ethyl acetate (2 x 25 mL). The combined organics were washed with water (50 mL), brine (50 mL), dried (Na 2 S0 4 ) and concentrated in vacuo. The residue obtained was triturated with diethyl ether and n-pentane to give 1 - isopropyl-5-(trifluoromethyl)-1 /-/-pyrazole-3-sulfonamide as a white solid (75 mg, 61 %).
• 2,3-dihydrobenzo[b]thiophene 1 , 1 -dioxide (0.75 g, 4.45 mmol) was heated in chlorosulfonic acid (1 .5 mL, 22.2 mmol ) at 80 °C for 4 h. Reaction mixture was poured onto crushed ice and stirred for 5 minutes. The aqueous solution was extracted with dichloromethane (2x50 mL) and the combined organics dried (MgS0 4 ) and concentrated in vacuo to give 2,3-dihydrobenzo[£>]thiophene-6- sulfonyl chloride 1 , 1 -dioxide (0.45 g, 38%) as a light brown oil.
• Benzene-1 ,3-disulfonyl dichloride (0.50 g, 0.726 mmol) was dissolved in tetrahydrofuran (4 mL) and the solution was cooled to 0 °C.
• aqueous ammonia (0.4 mL) was added at 0 °C and the mixture was stirred at ambient temperature for 1 h.
• the mixture was poured into chilled water and extracted with ethyl acetate.
• the combined organic extracts were washed with brine, dried (Na 2 S0 4 ) and concentrated in vacuo.
• the resulting solid was triturated with pentane to afford the titled compound as a light brown solid (0.16 g, 87%).
• 4-(trifluoromethyl)pyridine-2-sulfonamide was synthesized according to the procedures used to synthesise pyridine-2-sulfonamide but using 4- (trifluoromethyl)pyridine-2-thiol in place of pyridine-2-thiol.
• the product 4- (trifluoromethyl)pyridine-2-sulfonamide was given as a solid (0.7 g, 56%).
• Methyl 4-chlorobutanimidate hydrochloride (25 g, 146.1 mmol) was dissolved in DCM (250 mL) treated with Et 3 N (44.3 g, 4.38 mmol) and resulting solution was cooled to 0 °C.
• 2,2-Dimethoxyethan-1 -amine (12.2 g, 1 16.9 mmol) was added dropwise to the above mixture over a period of 5 min.
• the resulting reaction mixture was warmed to 60 °C and stirred for 3 h.
• the reaction mixture was concentrated in vacuo and residue obtained was treated with in formic acid (150 mL) and heated at 80 °C for 24 h.
• Xantphos (74mg, 0.128mmol) and Pd 2 (dba) 3 (60 mg, 0.064 mmol) were sequentially added to the aforementioned solution and the vessel purged with nitrogen gas for 5 minutes. The resulting mixture was stirred at 1 10 °C for 12h. Upon completion, the mixture was cooled to RT, diluted with EtOAc (25 mL) and filtered through celite. The filtrate was dried (Na 2 S0 4 ) and concentrated in vacuo.
• 3-Nitro-1 H-pyrazole (5 g, 44 mmol) was dissolved in A/,A/-dimethylformamide (100 ml_), cooled to -5 °C and NaH (3.8 g, 93.6 mmol) added portionwise. The reaction mixture was stirred for 15 mins before adding dibromodifluoromethane (8.6 g, 44 mmol) and allowing to warm to ambient temperature overnight. The reaction mixture was quenched using ice-water and extracted using ethyl acetate.
• reaction mixture was diluted using DCM, washed using water, brine, dried (Na 2 S0 4 ) and concentrated in vacuo.
• the crude product was purified by column chromatography on silica gel using 10% EtOAc-hexanes eluent to give 1 -cyclopropyl-3-(2,5-dimethyl-1 H-pyrrol-1 -yl)-1 H-pyrazole as a yellow liquid (0.2 g, 32%).
• 3-nitro-1 H-pyrazole (1 g, 8.85 mmol) was dissolved in N,N-dimethylformamide (20 mL) and treated with potassium carbonate (1.47 g, 10.62 mmol) and bromocyclohexane (1 .8 g, 10.62 mmol). The mixture was heated to 100 °C for 16 hours (or until completion) then cooled to ambient temperature diluted using water (100 mL) and extracted using ethyl acetate (2 x 75 mL). The combined organics were washed using water (100 mL), brine (100 mL), dried (Na 2 S0 4 ) and concentrated in vacuo.
• Ethyl 1 -methyl-3-nitro-1 --pyrazole-5-carboxylate (0.65 g, 3.3 mmol) was dissolved in THF (20 mL) and MeOH (5 mL) at 0 °C.
• Zinc powder (1 .0 g, 16.3 mmol) and aqueous NH 4 CI (0.87 g, 16.3 mmol) were added sequentially.
• the resulting reaction mixture was stirred at ambient temperature for 4h, then heated to 70 C for 1 hour. The solvents were removed in vacuo. The residue obtained was dissolved in EtOAc (30 mL) and filtered through a bed of Celite.
• Ethyl 1 -benzyl-3-nitro-1 --pyrazole-5-carboxylate (1.2 g, 4.36 mmol) was dissolved in THF (20 mL) and MeOH (5 mL) at 0 °C.
• Zinc powder (1.4 g, 21 .8 mmol) and aqueous NH 4 CI (1.16g, 21 .8 mmol) were added sequentially.
• the resulting reaction mixture was stirred at ambient temperature for 4h, then concentrated in vacuo.
• the residue obtained was dissolved in EtOAc (30 mL) and filtered through a bed of Celite.
• A/-Bromosuccinimide (1.02 g, 5.78 mmol) was added portion-wise to a solution of 1 ,2,3,5,6,7-hexahydro-s-indacen-4-amine (1 g, 5.78 mmol) in DCM (20 mL) at 0 °C.
• the solution was gradually warmed to ambient temperature and stirred for 12 h.
• the reaction mixture was diluted with sat. aqueous Na 2 S 2 0 3 (50 mL) and extracted with DCM (2 x 25 mL). The combined organic extracts were washed with water (25 mL), brine (25 mL), dried (Na 2 S0 4 ) and concentrated in vacuo.
• A/-Chlorosuccinimide (0.46 g, 3.46 mmol) was added portion-wise to a solution of 1 ,2,3,5,6,7-hexahydro-s-indacen-4-amine, 1 (0.6 g, 3.46 mmol) in CHCI 3 (10 mL) at 0 °C. The solution was gradually warmed to ambient temperature and stirred for 10 h. The reaction mixture was diluted with sat. aqueous Na 2 S 2 0 3 (50 mL) and extracted with DCM (2 x 25 mL). The combined organic extracts were washed with water (25 mL), brine (25 mL), dried (Na 2 S0 4 ) and concentrated in vacuo.
• aluminium trichloride (2 g, 15 mmol) was added to anhydrous 1 ,2-dichloroethane (40 mL) at 0 °C followed by the acid chloride solution (10 mL) drop-wise over 5 min and the resulting solution was stirred for 30 min at 0 °C.
• a further portion of aluminium trichloride (3 g, 22.5 mmol) was added followed by drop-wise addition of the remaining acid chloride solution (20 mL) at 0 °C.
• the reaction mixture was stirred at room temperature for 1 h or until completion, diluted with water and extracted using EtOAc (2 x 50 mL).
• N-(3,5,6,7-tetrahydro-2H-indeno[5,6-b]furan-8-yl)pivalamide (0.55 g, 2.12 mmol) in acetic acid (10 mL) was treated drop-wise with a solution of bromine (0.4 g, 2.55 mmol) in acetic acid (2.0 mL) and the reaction stirred at ambient temperature for 3 h. Ice cold water was added to the reaction mixture and stirred for 10 min.
• N-(4-bromo-3,5,6,7-tetrahydro-2H-indeno[5,6-b]furan-8-yl)pivalamide (0.6 g, 1 .78 mmol) in EtOH (10 mL) and cHCI (15 mL) was heated at 90 °C for 36 h. The solution was concentrated in vacuo then basified using aq NH 4 OH solution.
• 2,4,6-Trichloropyrimidine (2.7 g, 14.7 mmol) was dissolved in anhydrous THF (30 mL) at 0 °C under nitrogen atmosphere.
• Cul (280 mg, 1.47 mmol) was added to the aforementioned solution and subsequently treated with 2M tert- butylmagnesium chloride in THF (3.78 g, 16.15 mL, 32.3 mmol) at 0 °C under nitrogen atmosphere.
• the resulting mixture was stirred at RT for 3 h.
• the reaction mixture was diluted with saturated NH 4 CI solution and extracted with EtOAc (2 x 50 mL).
• A/-(2,3-dihydro-1 /-/-inden-4-yl)acetamide 200 mg, 1 .1 1 mmol was dissolved in AcOH (5 mL) and cooled to 0 °C.
• A/-Chlorosuccinimide (220 mg, 1 .69 mmol) was added then the reaction mixture was warmed to RT and strirred overnight.
• the aldehyde (0.68 g, 3.58 mmol) was oxidized using silver (I) oxide (1 .5 eq.) in 5% aqueous sodium hydroxide at rt for 20 days.
• the crude reaction mixture was filtered through celite, extracted using diethyl ether (2 x 50 mL) to remove unreacted aldehyde then the aqueous phase was acidified to pH 1 using 3.0 M aqueous HCI drop-wise at 0 °C.
• the aldehyde (0.5 g, 2.77 mmol) in acetone (5.0 mL) was treated with sulfamic acid (0.4 g, 4.17 mmol) in two portions at 0 °C.
• a solution of sodium chlorite (0.32 g, 3.6 mmol) in water (1 .0 mL) was added drop-wise and stirring continued at 0 °C for 4 h.
• the reaction mixture was diluted with water (20 mL) and extracted using 10% IPA/chloroform (2 x 20 mL). The combined organics were washed with water (25 mL), brine (25 mL), dried (Na 2 S0 4 ) and concentrated in vacuo.
• Methyl 2,3-dihydroxybenzoate (1.0 g, 5.95 mmol) in DMF (16 mL) was treated with KF (1 .79 g, 30.9 mmol) and stirred at ambient temperature for 30 minutes. Diiodomethane (1 .79 g, 6.7 mmol) was added and the reaction heated at 100 °C for 5 hours. The reaction mixture was cooled to rt, poured onto water (100 mL) and extracted using diethyl ether (2 x 50 mL). The combined organics were washed with water (50 mL), brine(50 mL), dried (MgS0 4 ) and concentrated in vacuo.
• Phenyl chloroform ate (1 .5 eq) was added slowly to a solution of quinolin-8- amine (1 g, 6.9 mmol) in THF (10 mL) and triethylamine (2 eq.) to 0 °C. The solution was stirred at room temperature for 2 h or until completion. The solution was diluted using sat.aq. NaHC03 solution, extracted using ethyl acetate (2 x 50 mL), washed with water, brine then dried (Na 2 S0 4 ) and concentrated in vacuo.

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