EP4634175A1 - Benzimidazole derivatives - Google Patents
Benzimidazole derivativesInfo
- Publication number
- EP4634175A1 EP4634175A1 EP23848280.6A EP23848280A EP4634175A1 EP 4634175 A1 EP4634175 A1 EP 4634175A1 EP 23848280 A EP23848280 A EP 23848280A EP 4634175 A1 EP4634175 A1 EP 4634175A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- alkyl
- methyl
- benzo
- compound
- fluoro
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D413/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms
- C07D413/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings
- C07D413/12—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings linked by a chain containing hetero atoms as chain links
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D413/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms
- C07D413/14—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing three or more hetero rings
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D498/00—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and oxygen atoms as the only ring hetero atoms
- C07D498/02—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and oxygen atoms as the only ring hetero atoms in which the condensed system contains two hetero rings
- C07D498/04—Ortho-condensed systems
Definitions
- Oxidative stress characterized by elevated levels of reactive oxygen species (ROS) within the cell, is counteracted by cellular anti-oxidant responses to maintain homeostasis. Aberrant ROS production, left unchecked, can result in damage to cellular components including lipids and nucleic acids. Excessive and prolonged oxidative stress within the cell is linked to chronic diseases including, but not limited to, autoimmune, pulmonary, neuroinflammatory, neurodegenerative, blood, cardiovascular, renal, metabolic, and cancer.
- ROS reactive oxygen species
- the Bach1 (BTB and CNC homology 1)/Nrf2 (nuclear factor erythroid 2-related factor 2) axis is a master regulator of the cellular antioxidant response, and a proven therapeutic target to counteract diseases driven by oxidative stress (e.g., Nrf2 activator dimethyl fumarate is approved in the U.S. for use in treating relapsing remitting multiple sclerosis and psoriasis).
- Nrf2 activator dimethyl fumarate is approved in the U.S. for use in treating relapsing remitting multiple sclerosis and psoriasis.
- AREs antioxidant response elements
- Bach1 In response to oxidative stress, Bach1 dissociates from the AREs allowing binding by the transcription factor Nrf2. This drives the expression of antioxidant response genes including, but not limited to, heme oxygenase-1 (Hmox1). Activation of the Bach1/Nrf2, and consequent Hmox1 expression, is associated with positive outcomes in numerous epidemiological association studies, genetic models and animal models of disease. [0004]
- One pathway regulated by the Bach1/Nrf2 pathway is inflammasomes. These are large multiprotein complexes that play an important role in both sterile tissue injury and infection. However, due to the potently inflammatory nature of inflammasome derived mediators, complex regulatory mechanisms have evolved to suppress inflammasome activation in the absence of injury or infection.
- Signal 1 stimulates transcription of inflammasome related genes, leading to upregulation of the individual components of the inflammasome, as well as the production of the pro-form of the inflammasome substrates interleukin-1 ⁇ (IL-1 ⁇ ), interleukin-18 (IL-18), and Gasdermin-D within the cytosol.
- Signal 2 is provided by an array of pathogen associated molecular patterns (PAMPs) and damage associated molecular patterns (DAMPs) that are sensed by a family of cytosolic pattern recognition receptors termed nucleotide-binding oligomerization domain-like receptors (NLRs), as well as a few additional inflammasome forming sensors.
- PAMPs pathogen associated molecular patterns
- DAMPs damage associated molecular patterns
- NLRs nucleotide-binding oligomerization domain-like receptors
- binding of the DAMP to its corresponding NLR leads to conformational changes in the NLR allowing self-oligomerization of the receptor.
- These NLR oligomers then recruit the adapter protein, apoptosis-associated speck-like protein containing a CARD (ASC).
- ASC apoptosis-associated speck-like protein containing a CARD
- This NLR-ASC complex then nucleates formation of an ASC filament, mediated through ASC’s pyrin domain (PYD).
- the ASC filaments in turn creates a platform for recruitment of caspase-1 leading autocatalytic cleavage and activation, as well nucleating subsequent caspase-1 filament formation mediated through the caspase-1 CARD domain, which is thought to amplify caspase-1 activation.
- Inflammasome formation can be initiated by at least 11 different sensors including Pyrin, numerous NLRs including NLRP1, NLRP3, NLRP6, NLRP7, NLRP12, NLRC4, and NLRC5, the PYHIN family members IFI-16 and AIM2, as well as RIG-I.
- Conventional approaches to inflammasome inhibition have targeted individual receptors, such as NLRP3, to inhibit a subset of inflammasomes.
- inflammasome forming receptors are a common pathological feature of many diseases including inflammatory bowel disease, arthritic diseases, and neurodegenerative disorders, among others.
- broader pharmaceutical approaches capable of simultaneously inhibiting multiple species of inflammasomes are needed to address pathological inflammasome-dependent inflammation.
- One way to achieve broader inflammasome inhibition is to target the shared components of the inflammasome, such as caspase-1 or ASC filaments. Assembly of the inflammasome is induced by a cytosolic sensor (e.g., NLRP3 or AIM2) which detects danger signals associated with infection or sterile injury.
- a cytosolic sensor e.g., NLRP3 or AIM2
- the sensor Upon sensing these signals, the sensor nucleates formation of long filaments composed of repeating units of the inflammasome adapter protein ASC. These filaments form a scaffold for the recruitment of caspase-1 leading to autoproteolytic activation of the enzyme.
- the development of active site inhibitors against caspase-1 has been significantly hindered by a highly conserved active site shared by all caspases. This feature, combined with the diverse and essential biological roles of other caspase family members, lead to a high degree of cross-reactivity with off-target caspase proteins, leading to unacceptable toxicity.
- the inflammasome plays a protective role against infection and injury, aberrant activation of the complex in the absence of infection or injury contributes to a wide range of inflammatory conditions.
- compositions and methods that prevent inflammasome driven inflammation is an important challenge.
- m is 0, 1, 2, or 3;
- n is 0, 1, 2, or 3;
- R is H, C 1 -C 6 alkyl, phenyl, -(C 1 -C 3 alkyl)-phenyl, heteroaryl optionally substituted with methyl, C 3 -C 8 cycloalkyl, or -(C 1 -C 3 alkyl)-C 3 -C 8 cycloalkyl;
- R 1 is independently halo, C 1 -C 6 alkyl, C 2 -C 6 alkenyl, C 2 -C 6 alkynyl, C 1 -C 6 haloalkyl, -NH2, -NH(C1-C6 alkyl),
- the compound of formula (I) is not 2-[(1-methyl-1H- benzimidazol-2-yl)amino]-5-benzoxazolecarboxylic acid.
- the disclosure provides pharmaceutical compositions comprising a compound (e.g., a compound of formula (I)) as described herein.
- the present disclosure provides compounds described herein bind to the transcriptional repressor Bach1.
- the present disclosure provides for a method of inhibiting Bach1 activity, the method comprising administering to a human subject an effect amount of the compound as otherwise described herein.
- the compounds are HO-1 inducers.
- the present disclosure provides a method of increasing the activity or the amount of HO-1 in a human subject comprising: administering to a human subject an effective amount of the compounds as otherwise described herein, or a pharmaceutically acceptable salt thereof, or an effective amount of the pharmaceutical composition thereof.
- Nrf 2 is a transcription factor that regulates HO-1 expression.
- the present disclosure provides methods of activating transcription factor Nrf2 in human subjects comprising: administering to a human subject an effective amount of the compounds as otherwise described herein, or a pharmaceutically acceptable salt thereof, or an effective amount of the pharmaceutical composition thereof.
- the present disclosure provides methods of reducing the amount of reactive oxygen species in human subjects comprising: administering to a human subject an effective amount of the compounds as otherwise described herein, or a pharmaceutically acceptable salt thereof, or an effective amount of the pharmaceutical composition thereof.
- the compounds as otherwise described herein are not intrinsically reductive.
- the compounds may function to reduce the amount of reactive oxygen species through enhancing or suppressing a biological target involved with a natural oxidative stress response.
- the disclosure provides methods for treating inflammatory conditions or disorders in a subject, particularly a mammalian subject, and more particularly a human subject. The methods include administering to the subject an effective amount of a compound as described herein.
- the disclosure provides compounds, pharmaceutical compositions, methods and uses for treating a variety of diseases associated with inhibiting inflammasome formation.
- one aspect of the disclosure provides compounds of formula (I) as described above: [0023] In certain embodiments, the compound of formula (I) is not: 2-[(1-methyl-1H- benzimidazol-2-yl)amino]-5-benzoxazolecarboxylic acid. [0024] In various embodiments, R is H, C 1 -C 3 alkyl, phenyl, benzyl, methylpyrazolyl, cyclopropyl, or cyclopropylmethyl.
- R is H or methyl or ethyl, e.g., H or CH 3 . In particular embodiments, R is CH 3 .
- each R 2 is independently H or methyl.
- the disclosure provides compounds of formula (I) as described herein, such as of formula: .
- One embodiment of the disclosure provides compounds of formula (I) as described herein, wherein m is 1 or 2. In one embodiment, m is 1.
- such compounds may be of formula: [0027]
- the disclosure provides compounds of formula: .
- the disclosure provides compounds of formula: .
- R 1 is independently halo, C 1 -C 6 alkyl, C 2 -C 6 alkenyl, C 2 -C 6 alkynyl, or C 1 -C 6 haloalkyl.
- R 1 is independently halo, C 1 -C 6 alkyl, or C 1 -C 6 haloalkyl.
- R 1 is independently halo, C 1 -C 3 alkyl, or C 1 -C 3 haloalkyl.
- R 1 is independently halo.
- the disclosure provides compounds of formula (I) as described herein wherein at least one R 1 is halo (such as fluoro). [0031] In certain embodiments, the disclosure provides compounds of formula: [0032] Another embodiment of the disclosure provides compounds of formula (I) as described herein, wherein R 2 is H or C 1 -C 3 alkyl. In certain embodiments, R 2 is H or methyl. In certain embodiments, R 2 is H. [0033] In certain embodiments, the disclosure provides compounds of formula: [0034] One embodiment of the disclosure provides compounds of formula (I) as described herein, wherein n is 1 or 2. In one embodiment, n is 1.
- such compounds may be of formula: [0035]
- the disclosure provides compounds of formula: [0036]
- the disclosure provides compounds of formula: [0037]
- Another embodiment of the disclosure provides compounds of formula (I) as described herein, wherein R 3 is -C 1 -C 6 alkyl-NR 4 R 5 , -C 1 -C 6 alkyl-CN, -C 1 -C 6 alkyl-OR 4 , -(C 1 -C 6 alkyl)-aryl optionally substituted with one or more R 6 , -(C 1 -C 6 alkyl)-heteroaryl optionally substituted with one or more R 6 , -(C 1 -C 6 alkyl)-heterocyclyl optionally substituted with one or more R 7 , -(C 1 -C 6 alkyl)-C 3 -C 8 cycloalkyl optionally substituted with one or more R 7 , -COH, -CO 2 H
- R 3 is -C 1 -C 6 alkyl-NR 4 R 5 , -C 1 -C 6 alkyl-CN, -C 1 -C 6 alkyl-OR 4 , - (C 1 -C 6 alkyl)-aryl optionally substituted with one or more R 6 , -(C 1 -C 6 alkyl)-heteroaryl optionally substituted with one or more R 6 , -(C 1 -C 6 alkyl)-heterocyclyl optionally substituted with one or more R 7 , -(C 1 -C 6 alkyl)-C 3 -C 8 cycloalkyl optionally substituted with one or more R 7 , -COH, - CO 2 H, -CO 2 (C 1 -C 6 alkyl), -CO(C 1 -C 6 alkyl), -CONH 2 , -CONH(C 1 -C 6 alkyl), or -CON
- R 3 is -C 1 -C 6 alkyl-NR 4 R 5 , -C 1 -C 6 alkyl-CN, -C 1 -C 6 alkyl-OR 4 , - (C1-C6 alkyl)-heterocyclyl optionally substituted with one or more R7, -COH, -CO2H, -CO2(C1- C 6 alkyl), -CO(C 1 -C 6 alkyl), -CONH 2 , -CONH(C 1 -C 6 alkyl), or -CON(C 1 -C 6 alkyl) 2 ; or two R 3 together with the atoms to which they are attached, form a heterocycle, the heterocycle optionally substituted with one or more R 7 .
- R 3 is -C 1 -C 6 alkyl-NR 4 R 5 , -C 1 -C 6 alkyl-CN, -C 1 -C 6 alkyl-OR 4 , -(C 1 -C 6 alkyl)-heterocyclyl optionally substituted with one or more R 7 , -COH, -CO 2 H, -CO 2 (C 1 -C 6 alkyl), -CO(C 1 -C 6 alkyl), -CONH 2 , -CONH(C 1 -C 6 alkyl), or -CON(C 1 -C 6 alkyl) 2 .
- R 3 is --C1- C 6 alkyl-NR 4 R 5 , -C 1 -C 6 alkyl-OR 4 , or -(C 1 -C 6 alkyl)-heterocyclyl optionally substituted with one or more R 7 .
- R 3 is -C 1 -C 6 alkyl-NR 4 R 5 .
- R 3 is -CONR 8 R 9 wherein R 8 and R 9 are independently H or C 1 -C 6 alkyl wherein each alkyl within R 8 and R 9 is independently substituted with one, two or three halogen, cyano, hydroxy, C 1 -C 3 alkoxy, amino, mono- or di(C 1 -C 3 alkyl)amino, amino-C 1 -C 3 alkoxy, mono- or di(C 1 -C 3 alkyl)amino-C1-C3 alkoxy, hydroxy-C1-C3 alkoxy, or C1-C6 alkoxy-C1-C6 alkoxy.
- R 3 is -CONR 8 R 9 wherein R 8 and R 9 are independently H or C 1 -C 6 alkyl wherein each alkyl within R 8 and R 9 is independently substituted with one, two or three halogen, cyano, hydroxy, C 1 -C 3 alkoxy, amino, mono- or di(C 1 -C 3 alkyl)amino, hydroxy-C 1 -C 3 alkoxy, or C 1 -C 6 alkoxy-C 1 -C 6 alkoxy.
- R 3 is -CONHR 9 wherein R 9 is H or C 1 -C 6 alkyl wherein the alkyl is substituted with one, two or three halogen, cyano, hydroxy, C 1 -C 3 alkoxy, amino, mono- or di(C 1 -C 3 alkyl)amino, hydroxy-C 1 -C 3 alkoxy, or C 1 -C 6 alkoxy-C 1 -C 6 alkoxy.
- R 3 is -CONHR 9 wherein R 9 is C 1 -C 6 alkyl substituted with one, two or three halogen, cyano, hydroxy, C 1 -C 3 alkoxy, amino or mono- or di(C 1 -C 3 alkyl)amino.
- R 3 is -CONHR 9 wherein R 9 is C 1 -C 6 alkyl substituted with hydroxy-C 1 -C 3 alkoxy or C 1 -C 6 alkoxy-C 1 - C 6 alkoxy.
- R 3 is -CONHR 9 wherein R 9 is C 1 -C 6 alkyl substituted with hydroxy-C 1 -C 3 alkoxy.
- R 3 is -CONHR 9 wherein R 9 is C1-C6 alkyl substituted with C1-C6 alkoxy-C1-C6 alkoxy.
- R 3 is -CONHR 9 wherein R 9 is C 1 -C 6 alkyl substituted with amino-C 1 -C 3 alkoxy.
- R 3 is -CONHR 9 wherein R 9 is C 1 -C 6 alkyl substituted with mono- or di(C 1 -C 3 alkyl)amino-C 1 -C 3 alkoxy.
- R 4 is C 1 - C6 alkyl and R 5 is C1-C6 alkyl optionally substituted with one or more R7, C2-C6 alkenyl, C2-C6 alkynyl, C 1 -C 6 haloalkyl, –(C 1 -C 6 alkyl)-O-C 1 -C 6 alkyl, –(C 1 -C 6 alkyl)-O-C 2 -C 6 alkenyl, or –(C 1 - C 6 alkyl)-O-C 2 -C 6 alkynyl.
- R 4 is C 1 -C 6 alkyl and R 5 is C 1 -C 6 alkyl optionally substituted with one or more R7. In certain embodiments, R 4 is C1-C3 alkyl and R 5 is C 1 -C 3 alkyl. In certain embodiments, R 4 is methyl and R 5 is methyl optionally substituted with one or more R 7 . [0051] In certain embodiments of the compounds of formula (I) as described herein, two R 3 together with the atoms to which they are attached, form a heterocycle, the heterocycle optionally substituted with one or more R 7 .
- R 3 is selected from: [0053] In particular embodiments, the compounds described herein are of formula: , where R is H or CH3; R 1 is independently halo, C1-C6 alkyl, or C1-C6 haloalkyl; and R 2 is H or C1-C3 alkyl. [0054] In particular embodiments, the compounds described herein are of formula: , where R is H or CH 3 ; R 1 is independently halo, C 1 -C 6 alkyl, or C 1 -C 6 haloalkyl; and R 2 is H or C 1 -C 3 alkyl.
- the compounds have the formula: . wherein R 1 is fluoro or hydrogen; and R 4 and R 5 are independently hydrogen, methyl, ethyl, propyl, isopropyl, propargyloxyethyl, propargyloxymethyl, or propargyl; or R 4 and R 5 together with the nitrogen to which they are attached form a 3-7 membered heterocycloalkyl group.
- R 1 is fluoro or hydrogen
- R 4 and R 5 are independently hydrogen, methyl, ethyl, propyl, isopropyl, propargyloxyethyl, propargyloxymethyl, or propargyl; or R 4 and R 5 together with the nitrogen to which they are attached form a 3-7 membered heterocycloalkyl group.
- the compound is in the form of a pharmaceutically acceptable salt of a compound as described herein.
- the person of ordinary skill in the art will appreciate that a variety of pharmaceutically- acceptable salts may be provided, as described in additional detail below.
- a compound is in the form of a solvate (e.g., a hydrate) of a compound or salt as described herein.
- a solvate e.g., a hydrate
- a variety of solvates and/or hydrates may be formed.
- the phrase “optionally in the form of a pharmaceutically acceptable salt thereof, and/or a solvate or hydrate thereof” includes compounds in the form of solvates and hydrates of base compounds or pharmaceutically acceptable salts as described above. But in certain embodiments as described above, the compound is not in the form of a solvate or hydrate.
- the compound of Formula (I) is: Table 1 or a pharmaceutically acceptable salt thereof.
- Therapeutic Applications [0058] The disclosure also provides methods of treating various inflammatory conditions, i.e., inflammatory diseases and disorders. These methods include administering to a subject in need of such treatment an effective amount of one or more compounds of the disclosure as described herein (e.g., compounds of formula (I)) or a pharmaceutical composition of the disclosure as described herein. [0059] In certain embodiments, the disclosure provides methods of treating inflammatory condition in a subject thereof, wherein the methods include providing to the subject a compound as otherwise described herein.
- the inflammatory condition is an inflammatory bowel disease, an arthritic disease, or a neurodegenerative disorder.
- the inflammatory condition is an infectious disease, autoimmune disease, cancer, metabolic disorder, or neurological disease.
- the inflammatory condition is an autoinflammatory syndrome.
- the inflammatory condition is an inflammasome-related condition.
- the diseases and disorders that can be treated according to the methods disclosed herein include, but are not limited to, Adult-Onset Still’s Disease (AOSD), Systemic Juvenile Idiopathic Arthritis (sJIA), Macrophage Activation Syndrome (MAS), Autoinflammation with Infantile Enterocolitic (AIFEC), Bullous Pemphigoid, Pemphigus Vulgaris, Idiopathic Pulmonary Fibrosis (IPF), Non-Alcoholic Steatohepatitis (NASH), Systemic Lupus Erythematosus (SLE), Multiple Sclerosis, Amyotrophic lateral sclerosis (ALS), Alzheimer’s Disease, Parkinson’s Disease, Epilepsy, Traumatic Brain Injury (TBI), Inflammatory Bowel Disease (IBD), Rheumatoid Arthritis (RA), Cryopyrin-Associated Periodic Syndromes (CAPS), Vitiligo, Multiple Self-Healing Palmoplantar Carcinoma (MSPC
- AOSD Advanced-On
- the disclosure provides methods for treating one or more diseases selected from the following categories: (i) fibrotic diseases, such as those related to the lung (COPD, idiopathic pulmonary fibrosis, sarcoidosis), liver (alcoholic cirrhosis, steatosis, cholestasis, drug induced fibrosis, viral infection), or skin (Scleroderma, psoriasis); (ii) neurodegenerative diseases, such as Friedreich’s ataxia, Alzheimer’s disease, Parkinson’s disease, amyotrophic lateral sclerosis, multiple sclerosis and Charcot-Marie-Tooth syndrome; (iii) cardiovascular disease, such as hypertension, heart failure, hypercholesterolemia, atherosclerosis, acute coronary thrombosis, deep vein thrombosis, peripheral vascular disease, congestive heart failure, acute coronary syndrome, failure of arterial fistula for dialysis and primary pulmonary hypertension, ischemia-reperfusion events;
- COPD idi
- the disclosure provides methods of treating inflammatory conditions that result from a viral, e.g., coronavirus (e.g., SARS-CoV 2, SARS-CoV, or MERS) infection, bacterial infection, fungal infection, parasitic infection, or other type of infection, in a human subject and consequently causes cell death, or release of pro-inflammatory cytokines or other inflammatory mediators.
- a viral e.g., coronavirus (e.g., SARS-CoV 2, SARS-CoV, or MERS) infection
- bacterial infection e.g., fungal infection, parasitic infection, or other type of infection
- MERS e.g., MERS
- the invention also provides for the use of a compound as described herein in combination with one or more medically effective active compounds for simultaneous, subsequent or sequential administration.
- medically effective ingredients include, but are not limited to, Nrf2 activators, antioxidants, detoxification agents (e.g., metformin).
- the invention provides a pharmaceutical composition comprising a compound as described herein and at least one other medically effective ingredients selected from Nrf2 activators, antioxidants, detoxification agents, anti-inflammatory agents, and antidiabetic agents (e.g., metformin).
- the invention provides for the use of a compound as described herein in combination with at least one other medically effective ingredients selected from Nrf2 activators, antioxidants, detoxification agents, anti-inflammatory agents, and antidiabetic agents (e.g., metformin) for simultaneous, subsequent or sequential administration.
- Nrf2 activators include sulforaphane, avicins, 15dPGJ2, xanthohumol, curcumin, carnosol, zerumbone, isothiocyanate, ⁇ -lipoic acid, olipraz (4-methyl-5-[2-pyrazinyl]- 1,2-dithiole-3-thione), 1,2-dithiole-3-thione, 2,3-butyl-4-hydroxuanisole, monomethyl fumarate, and dimethyl fumarate (Tefidera).
- antioxidants include vitamin C, vitamin E, carotenoids, retinoids, polyphenols, falvanoids, lignan, selenium, butylated hydroxyanisole, ethylene diamine tetra- acetate, calcium disodium, acetylcysteine, probucol, and tempo.
- detoxification agents include dimethyl caprol, glutathione, acetylcysteine, methionine, sodium hydrogen carbonate, deferoxamine mesylate, calcium disodium edetate, trientine hydrochloride, penicillamine, and pharmaceutical charcoal.
- compositions and Dosage Forms [0069] A compound as described herein can usefully be provided in the form of a pharmaceutical composition. Such compositions include the compound according to any one of the preceding aspects or embodiments described herein, together with a pharmaceutically acceptable excipient, diluent, or carrier.
- the compounds may be formulated in the pharmaceutical composition per se, or in the form of a hydrate, solvate, or pharmaceutically acceptable salt, as previously described. Typically, such salts are more soluble in aqueous solutions than the corresponding free acids and bases, but salts having lower solubility than the corresponding free acids and bases may also be formed.
- the pharmaceutical composition can be, for example, in the form of a tablet, a capsule, or a parenteral formulation, but the person of ordinary skill in the art will appreciate that the compound can be provided in a wide variety of pharmaceutical compositions.
- the compounds of the disclosure can be administered, for example, orally, topically, parenterally, by inhalation or spray or rectally in dosage unit formulations containing one or more pharmaceutically acceptable carriers, diluents or excipients.
- parenteral as used herein includes percutaneous, subcutaneous, intravascular (e.g., intravenous), intramuscular, or intrathecal injection or infusion techniques and the like.
- a medicament including a compound of the disclosure can be provided in any appropriate of the formulations and dosage forms as described herein.
- Pharmaceutical compositions can be made using the presently disclosed compounds.
- a pharmaceutical composition includes a pharmaceutically acceptable carrier, diluent or excipient, and compound as described above with reference to any one of structural formulae.
- one or more compounds of the disclosure may be present in association with one or more pharmaceutically acceptable carriers, diluents or excipients, and, if desired, other active ingredients.
- the pharmaceutical compositions containing compounds of the disclosure may be in a form suitable for oral use, for example, as tablets, troches, lozenges, aqueous or oily suspensions, dispersible powders or granules, emulsion, hard or soft capsules, or syrups or elixirs.
- compositions intended for oral use can be prepared according to any suitable method for the manufacture of pharmaceutical compositions, and such compositions may contain one or more agents selected from the group consisting of sweetening agents, flavoring agents, coloring agents, and preservative agents in order to provide pharmaceutically elegant and palatable preparations.
- Tablets contain the active ingredient in admixture with non-toxic pharmaceutically acceptable excipients that are suitable for the manufacture of tablets.
- excipients can be for example, inert diluents, such as calcium carbonate, sodium carbonate, lactose, calcium phosphate or sodium phosphate; granulating and disintegrating agents, for example, corn starch, or alginic acid; binding agents, for example starch, gelatin or acacia, and lubricating agents, for example magnesium stearate, stearic acid or talc.
- the tablets can be uncoated or coated by known techniques. In some cases, such coatings can be prepared by suitable techniques to delay disintegration and absorption in the gastrointestinal tract and thereby provide a sustained action over a longer period.
- a time delay material such as, glyceryl monostearate or glyceryl distearate
- a time delay material such as, glyceryl monostearate or glyceryl distearate
- Formulations for oral use can also be presented as hard gelatin capsules, wherein the active ingredient is mixed with an inert solid diluent, for example, calcium carbonate, calcium phosphate or kaolin, or as soft gelatin capsules wherein the active ingredient is mixed with water or an oil medium, for example, peanut oil, liquid paraffin or olive oil.
- Formulations for oral use can also be presented as lozenges.
- Aqueous suspensions contain the active materials in admixture with excipients suitable for the manufacture of aqueous suspensions.
- excipients can be suspending agents, for example, sodium carboxymethylcellulose, methylcellulose, hydropropylmethylcellulose, sodium alginate, polyvinylpyrrolidone, gum tragacanth and gum acacia; dispersing or wetting agents such as a naturally-occurring phosphatide, for example, lecithin, or condensation products of an alkylene oxide with fatty acids, for example, polyoxyethylene stearate, or condensation products of ethylene oxide with long chain aliphatic alcohols, for example heptadecaethyleneoxycetanol, or condensation products of ethylene oxide with partial esters derived from fatty acids and a hexitol such as polyoxyethylene sorbitol monooleate, or condensation products of ethylene oxide with partial esters derived from fatty acids and hexitol anhydrides, for example polyethylene sorbitan monooleate.
- dispersing or wetting agents such as a naturally-occurring phosphatide, for example, lecithin
- the aqueous suspensions may also contain one or more preservatives, for example, ethyl, or n-propyl p-hydroxybenzoate, one or more coloring agents, one or more flavoring agents, and one or more sweetening agents, such as sucrose or saccharin.
- Oily suspensions can be formulated by suspending the active ingredients in a vegetable oil, for example, arachis oil, olive oil, sesame oil or coconut oil, or in a mineral oil such as liquid paraffin.
- the oily suspensions may contain a thickening agent, for example, beeswax, hard paraffin, or cetyl alcohol. Sweetening agents and flavoring agents may be added to provide palatable oral preparations.
- compositions may be preserved by the addition of an anti- oxidant such as ascorbic acid.
- an anti- oxidant such as ascorbic acid.
- Dispersible powders and granules suitable for preparation of an aqueous suspension by the addition of water provide the active ingredient in admixture with a dispersing or wetting agent, suspending agent and one or more preservatives. Suitable dispersing or wetting agents or suspending agents are exemplified by those already mentioned above. Additional excipients, for example, sweetening, flavoring and coloring agents, can also be present.
- Pharmaceutical compositions can also be in the form of oil-in-water emulsions.
- the oily phase can be a vegetable oil or a mineral oil or mixtures of these.
- Suitable emulsifying agents can be naturally-occurring gums, for example, gum acacia or gum tragacanth, naturally- occurring phosphatides, for example, soy bean, lecithin, and esters or partial esters derived from fatty acids and hexitol, anhydrides, for example, sorbitan monooleate, and condensation products of the said partial esters with ethylene oxide, for example, polyoxyethylene sorbitan monooleate.
- the emulsions can also contain sweetening and flavoring agents.
- the pharmaceutically acceptable carrier, diluent, or excipient is not water. In other embodiments, the water comprises less than 50% of the composition.
- compositions comprising less than 50% water have at least 1%, 2%, 3%, 4% or 5% water. In other embodiments, the water content is present in the composition in a trace amount.
- the pharmaceutically acceptable carrier, diluent, or excipient is not alcohol.
- the alcohol comprises less than 50% of the composition. In some embodiments, compositions comprising less than 50% alcohol have at least 1%, 2%, 3%, 4% or 5% alcohol. In other embodiments, the alcohol content is present in the composition in a trace amount.
- Syrups and elixirs can be formulated with sweetening agents, for example, glycerol, propylene glycol, sorbitol, glucose or sucrose. Such formulations can also contain a demulcent, a preservative, flavoring, and coloring agents.
- the pharmaceutical compositions can be in the form of a sterile injectable aqueous or oleaginous suspension. This suspension can be formulated according to the known art using those suitable dispersing or wetting agents and suspending agents that have been mentioned above.
- the sterile injectable preparation can also be a sterile injectable solution or suspension in a non-toxic parentally acceptable diluent or solvent, for example, as a solution in 1,3-butanediol.
- compositions can also be administered in the form of suppositories, e.g., for rectal administration of the drug.
- suppositories e.g., for rectal administration of the drug.
- compositions can be formulated in a unit dosage form of the active ingredient.
- unit dosage forms refers to physically discrete units suitable as unitary dosages for human subjects and other mammals, each unit containing a predetermined quantity of active material calculated to produce the desired therapeutic effect, in association with a suitable pharmaceutical excipient.
- the compound can be effective over a wide dosage range and is generally administered in a pharmaceutically effective amount. It will be understood, however, that the amount of the compound actually administered will usually be determined by a physician, according to the relevant circumstances, including the condition to be treated, the chosen route of administration, the actual compound administered, the age, weight, and response of the individual patient, the severity of the patient's symptoms, and the like. [0088] For preparing solid compositions such as tablets, the principal active ingredient is mixed with a pharmaceutical excipient to form a solid preformulation composition containing a homogeneous mixture of a compound described herein.
- the active ingredient is typically dispersed evenly throughout the composition so that the composition can be readily subdivided into equally effective unit dosage forms such as tablets, pills and capsules.
- This solid preformulation is then subdivided into unit dosage forms of the type described above containing from, for example, 0.1 to about 500 mg of the active ingredient of a compound described herein.
- the tablets or pills can be coated or otherwise compounded to provide a dosage form affording the advantage of prolonged action.
- the tablet or pill can comprise an inner dosage and an outer dosage component, the latter being in the form of an envelope over the former.
- the two components can be separated by an enteric layer which serves to resist disintegration in the stomach and permit the inner component to pass intact into the duodenum or to be delayed in release.
- enteric layers or coatings such materials including a number of polymeric acids and mixtures of polymeric acids with such materials as shellac, cetyl alcohol, and cellulose acetate.
- the amount of compound or composition administered to a patient will vary depending upon what is being administered, the purpose of the administration, such as prophylaxis or therapy, the state of the patient, the manner of administration, and the like. In therapeutic applications, compositions can be administered to a patient already suffering from a disease in an amount sufficient to cure or at least partially arrest the symptoms of the disease and its complications.
- compositions administered to a patient can be in the form of pharmaceutical compositions described above. These compositions can be sterilized by conventional sterilization techniques, or may be sterile filtered. Aqueous solutions can be packaged for use as is, or lyophilized, the lyophilized preparation being combined with a sterile aqueous carrier prior to administration.
- the pH of the compound preparations typically will be between 3 and 11, more preferably from 5 to 9 and most preferably from 7 to 8.
- the therapeutic dosage of the compounds can vary according to, for example, the particular use for which the treatment is made, the manner of administration of the compound, the health and condition of the patient, and the judgment of the prescribing physician.
- the proportion or concentration of a compound described herein in a pharmaceutical composition can vary depending upon a number of factors including dosage, chemical characteristics (e.g., hydrophobicity), and the route of administration.
- the compounds described herein can be provided in an aqueous physiological buffer solution containing about 0.1 to about 10% w/v of the compound for parenteral administration.
- Some typical dose ranges are from about 1 ⁇ g/kg to about 1 g/kg of body weight per day. In some embodiments, the dose range is from about 0.01 mg/kg to about 100 mg/kg of body weight per day.
- the dosage is likely to depend on such variables as the type and extent of progression of the disease or disorder, the overall health status of the particular patient, the relative biological efficacy of the compound selected, formulation of the excipient, and its route of administration. Effective doses can be extrapolated from dose response curves derived from in vitro or animal model test systems.
- the compounds described herein can also be formulated in combination with or administered sequentially with one or more additional active ingredients which can include any pharmaceutical agent such as antiviral agents, vaccines, antibodies, immune enhancers, immune suppressants, anti-inflammatory agents and the like.
- additional active ingredients can include any pharmaceutical agent such as antiviral agents, vaccines, antibodies, immune enhancers, immune suppressants, anti-inflammatory agents and the like.
- the person of ordinary skill in the art will formulate a compound as described into pharmaceutical formulations herein. For example, based on the physicochemical properties of the compound, one of ordinary skill in the art will recognize a pharmaceutically effective amount of the compound, and the desired route of administration.
- an “alkyl” moiety can refer to a monovalent radical (e.g., CH 3 -CH 2 -)
- a bivalent linking moiety can be “alkyl,” in which case those skilled in the art will understand the alkyl to be a divalent radical (e.g., -CH 2 - CH 2 -), which is equivalent to the term “alkylene.”
- alkyl a divalent radical
- aryl aryl
- Nitrogens in the presently disclosed compounds can be hypervalent, e.g., an N-oxide or tetrasubstituted ammonium salt.
- a moiety may be defined, for example, as -B-(A) a , wherein a is 0 or 1. In such instances, when a is 0 the moiety is -B and when a is 1 the moiety is -B-A.
- alkyl includes a saturated hydrocarbon having a designed number of carbon atoms, such as 1 to 10 carbons (i.e., inclusive of 1 and 10), 1 to 8 carbons, 1 to 6 carbons, 1 to 3 carbons, or 1, 2, 3, 4, 5 or 6.
- Alkyl group may be straight or branched and depending on context, may be a monovalent radical or a divalent radical (i.e., an alkylene group).
- the moiety “-(C 1 C 6 alkyl)-O-” signifies connection of an oxygen through an alkylene bridge having from 1 to 6 carbons and C 1 -C 3 alkyl represents methyl, ethyl, and propyl moieties.
- alkyl examples include, for example, methyl, ethyl, propyl, isopropyl, butyl (including iso-, sec- and tert-butyl), pentyl, and hexyl.
- alkoxy represents an alkyl group of indicated number of carbon atoms attached to the parent molecular moiety through an oxygen bridge. Examples of “alkoxy” include, for example, methoxy, ethoxy, propoxy, and isopropoxy.
- alkenyl as used herein, unsaturated hydrocarbon containing from 2 to 10 carbons (i.e., inclusive of 2 and 10), 2 to 8 carbons, 2 to 6 carbons, or 2, 3, 4, 5 or 6, unless otherwise specified, and containing at least one carbon-carbon double bond.
- Alkenyl group may be straight or branched and depending on context, may be a monovalent radical or a divalent radical (i.e., an alkenylene group).
- the moiety “-(C 2 -C 6 alkenyl)-O-” signifies connection of an oxygen through an alkenylene bridge having from 2 to 6 carbons.
- alkenyl include, but are not limited to, ethenyl, 2-propenyl, 2- methyl-2-propenyl, 3-butenyl, 4-pentenyl, 5-hexenyl, 2-heptenyl, 2-methyl-1-heptenyl, 3- decenyl, and 3,7-dimethylocta-2,6-dienyl.
- alkynyl unsaturated hydrocarbon containing from 2 to 10 carbons (i.e., inclusive of 2 and 10), 2 to 8 carbons, 2 to 6 carbons, or 2, 3, 4, 5 or 6 unless otherwise specified, and containing at least one carbon-carbon triple bond.
- Alkynyl group may be straight or branched and depending on context, may be a monovalent radical or a divalent radical (i.e., an alkynylene group).
- an alkynylene group i.e., an alkynylene group
- the moiety “-(C 2 -C 6 alkynyl)-O-” signifies connection of an oxygen through an alkynylene bridge having from 2 to 6 carbons.
- Representative examples of alkynyl include, but are not limited to, acetylenyl, 1-propynyl, 2- propynyl, 3-butynyl, 2-pentynyl, and 1-butynyl.
- aryl represents an aromatic ring system having a single ring (e.g., phenyl) which is optionally fused to other aromatic hydrocarbon rings or nonaromatic hydrocarbon or heterocycle rings.
- Aryl includes ring systems having multiple condensed rings and in which at least one is carbocyclic and aromatic, (e.g., 1,2,3,4tetrahydronaphthyl, naphthyl).
- aryl groups include phenyl, 1naphthyl, 2naphthyl, indanyl, indenyl, dihydronaphthyl, fluorenyl, tetralinyl, and 6,7,8,9-tetrahydro-5H-benzo[a]cycloheptenyl.
- Aryl also includes ring systems having a first carbocyclic, aromatic ring fused to a nonaromatic heterocycle, for example, 1H-2,3dihydrobenzofuranyl and tetrahydroisoquinolinyl.
- aryl groups herein are unsubstituted or, when specified as “optionally substituted”, can unless stated otherwise be substituted in one or more substitutable positions with various groups as indicated.
- halogen or “halo” indicate fluorine, chlorine, bromine, and iodine. In certain embodiments of each and every embodiment as otherwise described herein, the term “halogen” or “halo” refers to fluorine or chlorine. In certain embodiments of each and every embodiment described herein, the term “halogen” or “halo” refers to fluorine.
- fluoroalkyl indicates an alkyl group (i.e., as otherwise described herein) that is substituted with at least one fluorine.
- Fluoroalkyl or “fluorinated alkyl” includes alkyl groups substituted with one or multiple fluorines, such as perfluoroalkyl groups.
- fluoroalkyl groups include fluoromethyl, difluoromethyl, trifluoromethyl, pentafluoroethyl, 2,2,2-trifluoroethyl, 1,1,1,3,3,3-hexafluoroprop-2-yl and 2,2,3,3,3-pentafluoroprop-1-yl.
- heteroaryl refers to an aromatic ring system containing at least one aromatic heteroatom selected from nitrogen, oxygen and sulfur in an aromatic ring.
- the heteroaryl groups will have 1, 2, 3, or 4 heteroatoms.
- the heteroaryl may be fused to one or more non-aromatic rings, for example, cycloalkyl or heterocycloalkyl rings, wherein the cycloalkyl and heterocycloalkyl rings are described herein.
- the heteroaryl group is bonded to the remainder of the structure through an atom in a heteroaryl group aromatic ring.
- the heteroaryl group is bonded to the remainder of the structure through a non-aromatic ring atom.
- heteroaryl groups include, for example, pyridyl, pyrimidinyl, quinolinyl, benzothienyl, indolyl, indolinyl, pyridazinyl, pyrazinyl, isoindolyl, isoquinolyl, quinazolinyl, quinoxalinyl, phthalazinyl, imidazolyl, isoxazolyl, pyrazolyl, oxazolyl, thiazolyl, indolizinyl, indazolyl, benzothiazolyl, benzimidazolyl, benzofuranyl, furanyl, thienyl, pyrrolyl, oxadiazolyl, thiadiazolyl, benzo[1,4]oxazinyl, triazolyl, tetrazolyl, isothiazolyl, naphthyridinyl, isochromanyl, chromanyl, iso
- Preferred heteroaryl groups include pyridyl, pyrimidyl, quinolinyl, indolyl, pyrrolyl, furanyl, thienyl and imidazolyl, pyrazolyl, indazolyl, thiazolyl and benzothiazolyl.
- each heteroaryl is selected from pyridyl, pyrimidinyl, pyridazinyl, pyrazinyl, imidazolyl, isoxazolyl, pyrazolyl, oxazolyl, thiazolyl, furanyl, thienyl, pyrrolyl, oxadiazolyl, thiadiazolyl, triazolyl, tetrazolyl, isothiazolyl, pyridinyl-N-oxide, pyrrolyl N- oxide, pyrimidinyl N-oxide, pyridazinyl N-oxide, pyrazinyl N-oxide, imidazolyl N-oxide, isoxazolyl N-oxide, oxazolyl N-oxide, thiazolyl N-oxide, pyrrolyl N-oxide, oxadiazolyl N-oxide, thiadiazolyl N-oxide
- Preferred heteroaryl groups include pyridyl, pyrimidyl, quinolinyl, indolyl, pyrrolyl, furanyl, thienyl, imidazolyl, pyrazolyl, indazolyl, thiazolyl and benzothiazolyl.
- the heteroaryl groups herein are unsubstituted or, when specified as “optionally substituted”, can unless stated otherwise be substituted in one or more substitutable positions with various groups, as indicated.
- heterocycloalkyl refers to a non-aromatic ring or ring system containing at least one heteroatom that is preferably selected from nitrogen, oxygen and sulfur, wherein said heteroatom is in a non-aromatic ring.
- the heterocycloalkyl may have 1, 2, 3 or 4 heteroatoms.
- the heterocycloalkyl may be saturated (i.e., a heterocycloalkyl) or partially unsaturated (i.e., a heterocycloalkenyl).
- Heterocycloalkyl includes monocyclic groups of three to eight annular atoms as well as bicyclic and polycyclic ring systems, including bridged and fused systems, wherein each ring includes three to eight annular atoms.
- the heterocycloalkyl ring is optionally fused to other heterocycloalkyl rings and/or non-aromatic hydrocarbon rings.
- the heterocycloalkyl groups have from 3 to 7 members in a single ring.
- heterocycloalkyl groups have 5 or 6 members in a single ring.
- the heterocycloalkyl groups have 3, 4, 5, 6 or 7 members in a single ring.
- heterocycloalkyl groups include, for example, azabicyclo[2.2.2]octyl (in each case also “quinuclidinyl” or a quinuclidine derivative), azabicyclo[3.2.1]octyl, 2,5- diazabicyclo[2.2.1]heptyl, morpholinyl, thiomorpholinyl, thiomorpholinyl S-oxide, thiomorpholinyl S,S-dioxide, 2-oxazolidonyl, piperazinyl, homopiperazinyl, piperazinonyl, pyrrolidinyl, azepanyl, azetidinyl, pyrrolinyl, tetrahydropyranyl, piperidinyl, tetrahydrofuranyl, tetrahydrothienyl, 3,4-dihydroisoquinolin-2(1H)-yl, isoindolindionyl,
- heterocycloalkyl groups include morpholinyl, 3,4-dihydroisoquinolin-2(1H)-yl, tetrahydropyranyl, piperidinyl, aza-bicyclo[2.2.2]octyl, ⁇ -butyrolactonyl (i.e., an oxo-substituted tetrahydrofuranyl), ⁇ -butryolactamyl (i.e., an oxo-substituted pyrrolidine), pyrrolidinyl, piperazinyl, azepanyl, azetidinyl, thiomorpholinyl, thiomorpholinyl S,S-dioxide, 2-oxazolidonyl, imidazolidonyl, isoindolindionyl, piperazinonyl.
- morpholinyl 3,4-dihydroisoquinolin-2(1H)-yl,
- heterocycloalkyl groups herein are unsubstituted or, when specified as “optionally substituted”, can unless stated otherwise be substituted in one or more substitutable positions with various groups, as indicated.
- cycloalkyl refers to a nonaromatic carbocyclic ring or ring system, which may be saturated (i.e., a cycloalkyl) or partially unsaturated (i.e., a cycloalkenyl).
- the cycloalkyl ring optionally fused to or otherwise attached (e.g., bridged systems) to other cycloalkyl rings.
- cycloalkyl groups present in the disclosed compounds have from 3 to 7 members in a single ring, such as having 5 or 6 members in a single ring. In some embodiments, the cycloalkyl groups have 3, 4, 5, 6 or 7 members in a single ring.
- cycloalkyl groups include, for example, cyclohexyl, cyclopentyl, cyclobutyl, cyclopropyl, tetrahydronaphthyl and bicyclo[2.2.1]heptane.
- the cycloalkyl groups herein are unsubstituted or, when specified as “optionally substituted”, may be substituted in one or more substitutable positions with various groups, as indicated.
- ring system encompasses monocycles, as well as fused and/or bridged polycycles.
- substituted when used to modify a specified group or radical, means that one or more hydrogen atoms of the specified group or radical are each, independently of one another, replaced with the same or different substituent groups as defined below, unless specified otherwise.
- pharmaceutically acceptable salt refers to both pharmaceutically acceptable acid and base addition salts and solvates.
- Such pharmaceutically acceptable salts include salts of acids such as hydrochloric, phosphoric, hydrobromic, sulfuric, sulfinic, formic, toluenesulfonic, methanesulfonic, nitric, benzoic, citric, tartaric, maleic, hydroiodic, alkanoic such as acetic, HOOC(CH 2 ) n COOH where n is 0-4, and the like.
- Nontoxic pharmaceutical base addition salts include salts of bases such as sodium, potassium, calcium, ammonium, and the like. Those skilled in the art will recognize a wide variety of nontoxic pharmaceutically acceptable addition salts.
- tautomer refers to isomers of a compound that exist in equilibrium and differ from one another in the position and/or electron distribution of the protons. Certain compounds disclosed herein may exist in tautomeric form and all tautomeric forms of such compounds are within the scope of this disclosure. [0111]
- isotopes includes those atoms having the same atomic number but different mass numbers. As is known to those of skill in the art, certain atoms, such as hydrogen occur in different isotopic forms. For example, hydrogen includes three isotopic forms, protium, deuterium and tritium.
- certain compounds can be enriched at a given position with a particular isotope of the atom at that position.
- compounds having a fluorine atom may be synthesized in a form enriched in the radioactive fluorine isotope 18 F.
- compounds may be enriched in the heavy isotopes of hydrogen: deuterium and tritium; and similarly can be enriched in a radioactive isotope of carbon, such as 13 C.
- Such isotopic variant compounds undergo different metabolic pathways and can be useful, for example, in studying the ubiquitination pathway and its role in disease.
- the compound has substantially the same isotopic character as naturally- occurring materials.
- terapéuticaally effective amount refers to the amount of active compound or pharmaceutical agent that elicits the biological or medicinal response that is being sought in a tissue, system, animal, individual or human by a researcher, veterinarian, medical doctor or other clinician.
- an effective amount can be an amount suitable for (i) inhibiting the progression the disease; (ii) prophylactic use for example, preventing or limiting development of a disease, condition or disorder in an individual who may be predisposed or otherwise at risk to the disease, condition or disorder but does not yet experience or display the pathology or symptomatology of the disease; (iii) inhibiting the disease; for example, inhibiting a disease, condition or disorder in an individual who is experiencing or displaying the pathology or symptomatology of the disease, condition or disorder; (iv) ameliorating the referenced disease state, for example, ameliorating a disease, condition or disorder in an individual who is experiencing or displaying the pathology or symptomatology of the disease, condition or disorder (i.e., reversing or improving the pathology and/or symptomatology) such as decreasing the severity of disease; or (v) eliciting the referenced biological effect.
- treatment means (i) ameliorating the referenced disease state, condition, or disorder (or a symptom thereof), such as, for example, ameliorating a disease, condition or disorder in an individual who is experiencing or displaying the pathology or symptomatology of the disease, condition or disorder (i.e., reversing or improving the pathology and/or symptomatology) such as decreasing the severity of disease or symptom thereof, or inhibiting the progression of disease; or (ii) eliciting the referenced biological effect (e.g., inhibiting inflammasome formation or function, or inhibition of IL-1 ⁇ ).
- ameliorating the referenced disease state, condition, or disorder or a symptom thereof
- ameliorating a disease, condition or disorder in an individual who is experiencing or displaying the pathology or symptomatology of the disease, condition or disorder i.e., reversing or improving the pathology and/or symptomatology
- the referenced biological effect e.g., inhibiting inflammasome formation or function, or inhibition of IL-1 ⁇ .
- the disclosed compounds are purified via silica gel and/or alumina chromatography. See, e.g., Introduction to Modern Liquid Chromatography, 2nd Edition, ed. L. R. Snyder and J. J. Kirkland, John Wiley and Sons, 1979; and Thin Layer Chromatography, ed E. Stahl, Springer-Verlag, New York, 1969. [0119] During any of the processes for preparation of the subject compounds, it may be necessary and/or desirable to protect sensitive or reactive groups on any of the molecules concerned. This may be achieved by means of conventional protecting groups as described in standard works, such as J. F. W. McOmie, "Protective Groups in Organic Chemistry,” Plenum Press, London and New York 1973, in T. W.
- a “leaving group” as used herein refers to a moiety of a reactant (e.g., the alkylhalogenide of the disclosure) that is displaced from the first reactant in the chemical reaction.
- a reactant e.g., the alkylhalogenide of the disclosure
- Suitable leaving groups include, but are not limited to, halogen (such as Cl or Br), acetoxy, and sulfonyloxy groups (such as methyl sulfonyloxy, trifluoromethylsulfonyloxy (“triflate”), p-toluenesulfonyloxy (“tosylate”)).
- halogen such as Cl or Br
- acetoxy such as methyl sulfonyloxy, trifluoromethylsulfonyloxy (“triflate”), p-toluenesulfonyloxy (“tosylate”).
- reaction mixture is quenched with ice-cold water (100 mL) and stirred for 10 min. Solid precipitates out and is filtered and dried over vacuum to afford crude 4-fluoro-N-methyl-2- nitroaniline (18 g, 84%) as an orange solid.
- Step 2 Synthesis of 4-fluoro-N1-methylbenzene-1,2-diamine
- 4-fluoro-N-methyl-2-nitroaniline 18 g, 106 mmol
- ethyl acetate 90 mL
- DM water 90 mL
- zinc dust 69.2 g, 1.06 mol
- ammonium chloride 84.9 g, 1.59 mol
- reaction mixture is filtered through a celite bed, and the celite bed is washed with ethyl acetate (2 x 50 mL).
- the resulting filtrate is diluted in demineralized (DM) water (300 mL) and extracted with ethyl acetate (2 x 250 mL).
- DM demineralized
- organic layer is separated, dried over anhydrous sodium sulphate, and concentrated under reduced pressure to afford crude compound 4-fluoro-N1-methylbenzene-1,2-diamine (14 g, 94%) as a brown solid.
- Step 3 Synthesis of 5-fluoro-1-methyl-1H-benzo[d]imidazol-2-amine
- 4-fluoro-N1-methylbenzene-1,2-diamine 10 g, 71.3 mmol
- acetonitrile 30 mL
- water 10 mL
- cyanogen bromide 18.9 g, 178 mmol
- the reaction mixture is stirred for 16 h at room temperature.
- the progress of the reaction is monitored by TLC and LCMS.
- the reaction mixture is concentrated to obtain a crude product, which is diluted with DM water (200 mL) and extracted with ethyl acetate (2 x 100 mL).
- the aqueous layer is basified to pH ⁇ 12-14 using 1N sodium hydroxide solution (30 mL) and extracted with ethyl acetate (2 x 100 mL). The combined organic layers are separated, dried over anhydrous sodium sulphate, and concentrated under reduced pressure to afford 5-fluoro-1-methyl-1H-1,3-benzodiazol-2-amine (11.5 g, 97%) as brown solid.
- Step 4 Synthesis of methyl benzo[d]oxazole-5-carboxylate [0133] To a stirred solution of methyl 3-amino-4-hydroxybenzoate (5 g, 29.9 mmol) in triethyl orthoformate (50 mL) is added 4-methylbenzene-1-sulfonic acid (0.5 g, 2.9 mmol) at room temperature. The reaction mixture is heated to 100 °C for 16 h in a sealed tube. The progress of the reaction is monitored by TLC and LCMS. After completion of the reaction, the reaction mixture is concentrated under reduced pressure to afford a crude product.
- the crude product is purified by flash column chromatography using 0-30% ethyl acetate in n-heptane as eluent to afford methyl 1,3-benzoxazole-5-carboxylate (4 g, 75%) as a white solid.
- Step 5 Synthesis of methyl 2-((5-fluoro-1-methyl-1H-benzo[d]imidazol-2- yl)amino)benzo[d]oxazole-5-carboxylate
- methyl 1,3-benzoxazole-5-carboxylate 2.4 g, 13.5 mmol
- tetrahydrofuran 24 mL
- lithium(1+) 2-methylpropan-2-olate 3.25 g, 40.6 mmol
- iodine (2.58 g, 20.3 mmol
- reaction mixture is allowed to stir for 10 min, and then 5-fluoro-1-methyl-1H-1,3-benzodiazol-2-amine (3.36 g, 20.3 mmol) is added, after which the reaction mixture is stirred for 2 h at room temperature.
- the progress of the reaction is monitored by TLC and LCMS.
- the reaction mixture is diluted with DM water (100 mL) and extracted with ethyl acetate (2 x 100 mL). The combined organic layers are washed with saturated sodium chloride solution (20 mL), dried over anhydrous sodium sulphate, and concentrated under reduced pressure to afford a crude compound.
- the crude compound is purified by flash column chromatography using 0-60% ethyl acetate in n-heptane as eluent to afford methyl 2-[(5-fluoro-1-methyl-1H-1,3-benzodiazol- 2-yl)amino]-1,3-benzoxazole-5-carboxylate (1.6 g, Crude).
- Step 6 Synthesis of (2-((5-fluoro-1-methyl-1H-benzo[d]imidazol-2- yl)amino)benzo[d]oxazol-5-yl) methanol
- methyl 2-[(5-fluoro-1-methyl-1H-1,3-benzodiazol-2-yl)amino]- 1,3-benzoxazole-5-carboxylate (1.6 g, 4.7 mmol) in tetrahydrofuran (20 mL) is added 1M lithium aluminum hydride in THF (7.05 mL, 7.05 mmol) at room temperature. The reaction mixture is stirred for 2 h at room temperature.
- reaction mixture is quenched with saturated ammonium chloride solution (50 mL) and extracted with ethyl acetate (2 x 50 mL). The combined organic layers are washed with saturated sodium chloride solution (30 mL), dried over anhydrous sodium sulphate, and concentrated under reduced pressure to obtain a crude compound.
- the crude compound is purified by flash column chromatography using 0-10% methanol in dichloromethane as eluent to afford ⁇ 2-[(5-fluoro-1-methyl-1H-1,3-benzodiazol-2- yl)amino]-1,3-benzoxazol-5-yl ⁇ methanol (1.2 g, 82%) as an off-white solid.
- Step 7 Synthesis of 5-(chloromethyl)-N-(5-fluoro-1-methyl-1H-benzo[d]imidazol-2- yl)benzo[d]oxazol-2-amine
- ⁇ 2-[(5-fluoro-1-methyl-1H-1,3-benzodiazol-2-yl)amino]-1,3- benzoxazol-5-yl ⁇ methanol (1.2 g, 3.84 mmol) in dimethylformamide (12 mL) is added thionyl chloride (307 ⁇ L, 4.23 mmol) at 0 °C, and the reaction mixture is stirred for 2 h at 0 °C.
- reaction mixture is basified (pH ⁇ 8) using saturated potassium carbonate solution and extracted with ethyl acetate (2 x 50 mL). The combined organic layers are washed with saturated sodium chloride solution (30 mL), dried over anhydrous sodium sulphate, and concentrated under reduced pressure to afford 5-(chloromethyl)-N-(5-fluoro-1-methyl-1H-1,3-benzodiazol-2-yl)- 1,3-benzoxazol-2-amine (950 mg, Crude) as a pale yellow solid.
- Step 8 Synthesis of 5-((dimethylamino)methyl)-N-(5-fluoro-1-methyl-1H- benzo[d]imidazol-2-yl)benzo [d]oxazol-2-amine
- 5-(chloromethyl)-N-(5-fluoro-1-methyl-1H-1,3-benzodiazol-2-yl)- 1,3-benzoxazol-2-amine 950 mg, 2.87 mmol
- dimethylamine hydrogen chloride 351 mg, 4.31 mmol
- potassium carbonate (1.19 g, 8.62 mmol
- reaction mixture is stirred at 60 °C for 2 h.
- the progress of the reaction is monitored by TLC and LCMS.
- the reaction mixture is diluted with DM water (60 mL) and extracted with ethyl acetate (2 x 40 mL).
- the combined organic layers are washed with saturated sodium chloride solution (30 mL), dried over anhydrous sodium sulphate, and concentrated under reduced pressure to obtain a crude compound.
- Example 1 (5-[(dimethylamino)methyl]-N-(5- fluoro-1-methyl-1H-1,3-benzodiazol-2-yl)-1,3-benzoxazol-2-amine) (380 mg, 38%) as an off- white solid.
- LCMS (ES) m/z 340.3 [M+H] + .
- Example 2 Synthesis of 5- ⁇ [ethyl(methyl)amino]methyl ⁇ -N-(5-fluoro-1-methyl-1H-1,3-benzodiazol-2-yl)- 1,3-benzoxazol-2-amine [0143]
- Example 2 is synthesized in an analogous manner to Example 1, except that N- methylaminoethane is used in Step 8.
- LCMS (ES) m/z 352.2 [M-H] – .
- Example 3 Synthesis of 5-[(diethylamino)methyl]-N-(5-fluoro-1-methyl-1H-1,3-benzodiazol-2-yl)-1,3- benzoxazol-2-amine [0145]
- Example 3 is synthesized in an analogous manner to Example 1, except that N,N- diethylamine is used in Step 8.
- LCMS (ES) m/z 366.3 [M-H] – .
- Example 4 Synthesis of 5-[(dimethylamino)methyl]-N-[5-fluoro-1-(1-methyl-1H-pyrazol-4-yl)-1H-1,3- benzodiazol-2-yl]-1,3-benzoxazol-2-amine [0147]
- Example 4 is synthesized in an analogous manner to Example 1, except that 1- methyl-1H-pyrazol-4-amine is used in Step 1.
- LCMS (ES) m/z 406.3 [M+H] + .
- Example 5 Synthesis of 5-(azetidin-1-ylmethyl)-N-(5-fluoro-1-methyl-1H-benzo[d]imidazol-2- yl)benzo[d]oxazol-2-amine [0149]
- Example 5 is synthesized in an analogous manner to Example 1, except that azetidine is used in Step 8.
- LCMS (ES) m/z 352.2 [M+H] + .
- Example 6 Synthesis of 5-[(dimethylamino)methyl]-N-(1-methyl-1H-1,3-benzodiazol-2-yl)-1,3- benzoxazol-2-amine [0151]
- Example 6 is synthesized in an analogous manner to Example 1, except that 1-fluoro- 2-nitrobenzene is used in Step 1.
- LCMS (ES) m/z 322.3 [M+H] + .
- Example 7 Synthesis of 5-((dimethylamino)methyl)-N-(5-fluoro-1-methyl-1H-benzo[d]imidazol-2- yl)benzo[d]oxazol-2-amine [0153]
- Example 7 is synthesized in an analogous manner to Example 1, except that methyl 4-amino-3-hydroxybenzoate is used in Step 4.
- LCMS (ES) m/z 340.2 [M+H] + .
- Example 8 Synthesis of N-(5-fluoro-1-methyl-1H-1,3-benzodiazol-2-yl)-5-[(pyrrolidin-1-yl)methyl]-1,3- benzoxazol-2-amine [0155]
- Example 8 is synthesized in an analogous manner to Example 1, except that pyrrolidine is used in Step 8.
- LCMS (ES) m/z 366.2 [M+H] + .
- Example 9 Synthesis of 5-[(dimethylamino)methyl]-N-(5-fluoro-1-phenyl-1H-1,3-benzodiazol-2-yl)-1,3- benzoxazol-2-amine [0157]
- Example 9 is synthesized in an analogous manner to Example 1, except that phenylamine is used in Step 1.
- LCMS (ES) m/z 402.3[M+H] + .
- the resulting reaction mixture is allowed to stir at room temperature for 2 h. The progress of the reaction is monitored by TLC and LCMS. After completion of the reaction, the reaction mixture is concentrated under reduced pressure to obtain a crude. The crude is diluted with DM water (10 mL) and extracted with ethyl acetate (2 x 10 mL). The combined organic layers are separated and washed with DM water (10 mL), dried over anhydrous sodium sulphate, and concentrated under reduced pressure to afford a crude.
- the crude is purified by flash column chromatography using 30-40% ethyl acetate in n-heptane as eluents to afford tert-butyl N-(2-hydroxyethyl)-N-methylcarbamate (0.8 g, 69%) as a colorless liquid.
- Step 2 Synthesis of tert-butyl N-methyl-N-[2-(prop-2-yn-1-yloxy)ethyl]carbamate
- tert-butyl N-methyl-N-[2-(prop-2-yn-1-yloxy)ethyl]carbamate To a solution of sodium hydride (60% dispersion in mineral oil) (21.9 mg, 571 ⁇ mol) in dimethylformamide (3 mL) at 0 °C is added tert-butyl N-(2-hydroxyethyl)-N-methylcarbamate (0.8 g, 4.57 mmol) (diluted in dimethylformamide 4 mL) dropwise to the reaction mixture. After 20 min, 3-bromoprop-1-yne (815 mg, 6.85 mmol) is added dropwise to the reaction mixture at 0 °C.
- reaction mixture is allowed to stir from 0 °C to room temperature over 2 h. The progress of the reaction is monitored by TLC and LCMS. After completion of reaction, the reaction mixture is quenched slowly with saturated ammonium chloride solution (10 mL) at 0 °C and extracted with ethyl acetate (2 x 20 mL). The combined organic layers are separated, dried over sodium sulphate, and concentrated to afford a crude compound.
- the crude compound is purified by flash column chromatography using 10-15% ethyl acetate in n- heptane as eluents to afford tert-butyl N-methyl-N-[2-(prop-2-yn-1-yloxy)ethyl]carbamate (750 mg, 77%) as a yellow oil.
- Step 3 Synthesis of methyl[2-(prop-2-yn-1-yloxy)ethyl]amine hydrochloride [0164] To a stirred solution of tert-butyl N-methyl-N-[2-(prop-2-yn-1-yloxy)ethyl]carbamate (0.7 g, 4.22 mmol) in dichloromethane (8 mL, 125 mmol) is added 4.0 M hydrogen chloride in 1,4- dioxane (615 mg, 16.9 mmol) at 0 °C. The resulting reaction mixture is allowed to stir from 0 °C to room temperature over 2 h. The progress of the reaction is monitored by TLC and LCMS.
- Step 4 Synthesis of N-(5-fluoro-1-methyl-1H-1,3-benzodiazol-2-yl)-5-( ⁇ methyl[2-(prop- 2-yn-1-yloxy)ethyl]amino ⁇ methyl)-1,3-benzoxazol-2-amine
- 5-(chloromethyl)-N-(5-fluoro-1-methyl-1H-1,3-benzodiazol-2-yl)- 1,3-benzoxazol-2-amine i.e., the intermediate product in Step 7 of the synthesis of Example 1
- potassium carbonate 167 mg, 1.21 mmol
- methyl[2-(prop-2-yn-1-yloxy)ethyl]amine hydrochloride 136 mg, 907 ⁇ mol
- the resulting reaction mixture is allowed to stir at 80 °C for 2 h in a sealed tube.
- the progress of the reaction is monitored with TLC and LCMS.
- the reaction mixture is quenched with DM water (30 mL) and extracted with ethyl acetate (2 x 30 mL). The combined organic layers are dried over anhydrous sodium sulphate and concentrated under reduced pressure to afford a crude compound.
- Example 10 N-(5-fluoro-1-methyl-1H-1,3- benzodiazol-2-yl)-5-( ⁇ methyl[2-(prop-2-yn-1-yloxy)ethyl]amino ⁇ methyl)-1,3-benzoxazol-2- amine) as a brown solid (50 mg, 20%).
- LCMS (ES) m/z 408.3 [M+H] + .
- Example 11 Synthesis of 5-((dimethylamino)methyl)-N-(6-fluoro-1H-benzo[d]imidazol-2- yl)benzo[d]oxazol-2-amine [0168]
- Example 11 can be synthesized essentially according to procedures set forth in the preceding examples and Reaction Schemes 1 and 2.
- Example 12 Synthesis of N-(5-fluoro-1-methyl-1H-1,3-benzodiazol-2-yl)-5- ⁇ [methyl(propyl)amino]methyl ⁇ - 1,3-benzoxazol-2-amine
- Example 12 is synthesized in an analogous manner to Example 1, except that N- methylpropan-1-amine is used in Step 8.
- Example 13 is synthesized in Step 6 of the synthesis of Example 4.
- LCMS (ES) m/z 379.2 [M+H] + .
- Example 14 Synthesis of 5-((dimethylamino)methyl)-N-(5-fluoro-1-propyl-1H-benzo[d]imidazol-2- yl)benzo[d]oxazol-2-amine
- Example 14 is synthesized in an analogous manner to Example 1, except that 1- aminopropane is used in Step 1.
- LCMS (ES) m/z 367.2 [M-H] – .
- Example 15 Synthesis of N-(5-fluoro-1-methyl-1H-1,3-benzodiazol-2-yl)-5-[(morpholin-4-yl)methyl]-1,3- benzoxazol-2-amine [0176]
- Example 15 is synthesized in an analogous manner to Example 1, except that morpholine is used in Step 8.
- LCMS (ES) m/z 380.2 [M-H]-.
- Example 16 and Example 20 Synthesis of N-(5-fluoro-1-methyl-1H-benzo[d]imidazol-2-yl)-7-methyl-7,8-dihydro-6H- oxazolo[4,5-e]isoindol-2-amine (Example 16) and N-(5-fluoro-1-methyl-1H-benzo[d]imidazol- 2-yl)-6-methyl-6,7-dihydro-5H-oxazolo[4,5-f]isoindol-2-amine (Example 20) p
- Step 1 Synthesis of tert-butyl 5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2- yl)isoindoline-2-carboxylate [0179] To a stirred solution of tert-butyl 5-bromo-2,3-dihydro-1H-isoindole-2-carboxylate (5
- reaction mixture is degassed with nitrogen atmosphere for 10 min, and then tetrakis(triphenylphosphane) palladium (1.94 g, 1.68 mmol) is added.
- the reaction mixture is stirred at 80 °C for 16 h.
- the progress of the reaction is monitored by TLC.
- the reaction mixture is filtered through celite bed, and the solvent is concentrated under reduced pressure to obtain a crude compound.
- the crude compound is purified by flash column chromatography using 0-20% ethyl acetate in n-heptane as eluents to afford tert-butyl 5-(4,4,5,5-tetramethyl-1,3,2- dioxaborolan-2-yl)-2,3-dihydro-1H-isoindole-2-carboxylate (5.5 g, 95%) as a white solid.
- Step 2 Synthesis of tert-butyl 5-hydroxyisoindoline-2-carboxylate [0181] To a stirred solution of tert-butyl 5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,3- dihydro-1H-isoindole-2-carboxylate (5 g, 14.5 mmol) in ethyl acetate (60 mL) is added hydrogen peroxide (5.66 mL, 72.4 mmol) at room temperature and stirred for 2 h. The progress of the reaction is monitored by TLC and LCMS.
- reaction mixture is quenched with saturated sodium thiosulphate solution (100 mL) and extracted with ethyl acetate (2 x 150 mL). The combined organic layers are washed with saturated sodium chloride solution (100 mL), dried over anhydrous sodium sulphate, and concentrated under reduced pressure to obtain a crude compound.
- the crude compound is purified by flash column chromatography using 0-30% ethyl acetate in n-heptane as eluents to afford tert-butyl 5-hydroxy-2,3-dihydro-1H-isoindole-2-carboxylate (3.4 g, 100%) as a white solid.
- Step 3 Synthesis of regioisomeric mixtures of 4-nitro-2,3-dihydro-1H-isoindol-5-ol, trifluoroacetic acid; and 6-nitro-2,3-dihydro-1H-isoindol-5-ol, trifluoroacetic acid [0183] To a stirred solution of tert-butyl 5-hydroxy-2,3-dihydro-1H-isoindole-2-carboxylate (3.4 g, 14.5 mmol) in trifluoroacetic acid (40 mL) is added sodium nitrate (3.07 g, 36.1 mmol) portion wise at 0 °C.
- reaction mixture is warmed to room temperature and stirred for 1 h. The progress of the reaction is monitored by LCMS. After completion of the reaction, the reaction mixture is concentrated under reduced pressure to obtain regioisomeric mixtures of 4-nitro- 2,3-dihydro-1H-isoindol-5-ol, trifluoroacetic acid; and 6-nitro-2,3-dihydro-1H-isoindol-5-ol, trifluoroacetic acid (4.0 g, crude) as a brown liquid. The crude material is used in the next step without purification.
- Step 4 Synthesis of a regioisomeric mixture of 2-methyl-4-nitroisoindolin-5-ol and 2- methyl-6-nitroisoindolin-5-ol
- a stirred solution of regioisomeric mixtures of 4-nitro-2,3-dihydro-1H-isoindol-5-ol, trifluoroacetic acid; and 6-nitro-2,3-dihydro-1H-isoindol-5-ol, trifluoroacetic acid (4.0 g, 13.6 mmol) in methanol (40 mL) are added 37% formaldehyde in water (2.02 mL, 27.2 mmol), sodium acetate (2.23 g, 27.2 mmol), and acetic acid (0.5 mL) at 0 °C.
- reaction mixture is stirred for 15 min, and sodium cyanoborohydride (1.71 g, 27.2 mmol) is added to the reaction mixture.
- the reaction mixture is then stirred for 2 h at room temperature.
- the progress of the reaction is monitored by LCMS.
- the reaction mixture is quenched with DM water (100 mL) and extracted with 5% methanol in dichloromethane (2 x 100 mL).
- the combined organic layers are washed with saturated sodium chloride solution (80 mL), dried over anhydrous sodium sulphate, and concentrated under reduced pressure to obtain a crude compound.
- the crude compound is purified by flash column chromatography using 0-10% methanol in dichloromethane as eluents to afford a regioisomeric mixture of 2- methyl-4-nitro-2,3-dihydro-1H-isoindol-5-ol and 2-methyl-6-nitro-2,3-dihydro-1H-isoindol-5-ol (2.0 g, 76%) as a brown solid.
- Step 5 Synthesis of regioisomeric mixture of 6-amino-2-methyl-2,3-dihydro-1H- isoindol-5-ol and 4-amino-2-methyl-2,3-dihydro-1H-isoindol-5-ol [0187] To a stirred solution of a regioisomeric mixture 2-methyl-6-nitro-2,3-dihydro-1H- isoindol-5-ol and 2-methyl-4-nitro-2,3-dihydro-1H-isoindol-5-ol (1.0g, 5.15 mmol) in methanol (15 mL) is added 10% palladium on carbon (0.4 g, 3.76 mmol) under nitrogen atmosphere.
- reaction mixture is degassed with H 2 atmosphere and stirred under H 2 atmosphere for 2 h.
- the progress of the reaction is monitored by TLC and LCMS.
- the reaction mixture is filtered through celite bed, and the filtrate is concentrated under reduced pressure to afford a regioisomeric mixture of 6-amino-2-methyl-2,3-dihydro-1H- isoindol-5-ol and 4-amino-2-methyl-2,3-dihydro-1H-isoindol-5-ol (0.8 g, 95%) as a brown solid.
- Step 6 Synthesis of regioisomeric mixture 6-methyl-5H,6H,7H-[1,3]oxazolo[4,5- f]isoindol-2-amine and 7-methyl-6H,7H,8H-[1,3]oxazolo[4,5-e]isoindol-2-amine [0189] To a stirred solution of 6-amino-2-methyl-2,3-dihydro-1H-isoindol-5-ol and 4-amino-2- methyl-2,3-dihydro-1H-isoindol-5-ol (0.8 g, 4.87 mmol) in methanol (6 mL) and DM water (2 mL) is added cyanogen bromide (1.03 g, 9.74 mmol) at 0 °C.
- reaction mixture is stirred for 16 h at room temperature. The progress of the reaction is monitored by TLC and LCMS. After completion of the reaction, the reaction mixture is concentrated under reduced pressure, diluted with DM water (20 mL), and extracted with ethyl acetate (2 x 30 mL). The combined aqueous layers are basified with 1N sodium hydroxide solution (20 mL) and extracted with 5% methanol in dichloromethane (2 x 50 mL).
- Step 7 Synthesis of N-(5-fluoro-1-methyl-1H-benzo[d]imidazol-2-yl)-7-methyl-7,8- dihydro-6H-oxazolo [4,5-e]isoindol-2-amine, trifluoroacetic acid salt and N-(5-fluoro-1-methyl- 1H-benzo[d]imidazol -2-yl)-6-methyl-6,7-dihydro-5H-oxazolo[4,5-f]isoindol-2-amine, trifluoroacetic acid salt [0191] To a stirred solution of a regioisomeric mixture of 7-methyl-7,8-dihydro-6H-oxazolo[4,5- e]isoindol-2-amine and 6-methyl-6,7-dihydro-5H-oxazolo[4,5-f]isoindol-2-amine (250 mg, 1.32 mmol) in dimethyl s
- reaction mixture is stirred at 100 °C for 16 h.
- the progress of the reaction is monitored by TLC and LCMS.
- the reaction mixture is quenched with DM water (20 mL) and extracted with ethyl acetate (2 x 30 mL).
- the combined organic layers are washed with saturated sodium chloride solution (20 mL), dried over anhydrous sodium sulphate, and concentrated under reduced pressure to obtain a crude compound.
- Example 18 Synthesis of N-(1-cyclopropyl-5-fluoro-1H-1,3-benzodiazol-2-yl)-5-[(dimethylamino)methyl] - 1,3-benzoxazol-2-amine [0195]
- Example 18 is synthesized in an analogous manner to Example 1, except that 1- aminocyclopropane is used in Step 1.
- LCMS (ES) m/z 366.29 [M+H] + .
- Example 19 Synthesis of N-(5-fluoro-1-methyl-1H-benzo[d]imidazol-2-yl)-5-((4-methylpiperazin-1-yl) methyl) benzo[d]oxazol-2-amine trifluoro acetic acid [0197]
- Example 21 is synthesized in an analogous manner to Example 1, except that 1- cyclopropylmethylamine is used in Step 1.
- LCMS (ES) m/z 380.2 [M+H] + .
- Example 22 Synthesis of 5-(chloromethyl)-N-(5-fluoro-1-methyl-1H-1,3-benzodiazol-2-yl)-1,3-benzoxazol- 2-amine [0201]
- Example 22 is synthesized in Step 7 of the synthesis of Example 1.
- reaction mixture is stirred at room temperature for 16 h. The progress of the reaction is monitored by TLC and LCMS. After completion of the reaction, the reaction mixture is diluted with DM water (10 mL) and extracted with ethyl acetate (3 x 25 mL). The combined organic layers are washed with DM water (2 x 10 mL), dried over sodium sulphate, and concentrated under reduced pressure to afford a crude compound.
- Example 23 (N-(5-fluoro-1-methyl-1H-1,3-benzodiazol-2-yl)-5- (methoxymethyl)-1,3-benzoxazol-2-amine) (5 mg, 25%) as an off-white solid.
- LCMS (ES) m/z 327.2 [M+H] + .
- iodomethane (401 ⁇ L, 6.44 mmol) is added at 0 °C dropwise to the reaction mixture.
- the resulting reaction mixture is allowed to stir at room temperature for 2 h.
- the progress of the reaction is monitored by TLC and LCMS.
- the reaction mixture is quenched slowly with saturated ammonium chloride solution (25 mL) at 0 °C and extracted with ethyl acetate (2 x 20 mL).
- the combined organic layers are dried over anhydrous sodium sulphate and concentrated under reduced pressure to obtain a crude compound.
- the crude compound is purified by flash column chromatography using 10-15% ethyl acetate in n-heptane as eluents to afford tert-butyl N-methyl-N-(prop-2-yn-1-yl)carbamate as a yellow oil (450 mg, 83%).
- Step 2 Synthesis of methyl(prop-2-yn-1-yl)amine hydrochloride [0208] To a stirred solution of tert-butyl N-methyl-N-(prop-2-yn-1-yl)carbamate (450 mg, 2.66 mmol) in dichloromethane (4 mL) is added 4.0 M hydrogen chloride in dioxane (388 mg, 10.6 mmol) at 0 °C. The resulting reaction mixture is allowed to stir from 0 °C to room temperature over 2 h. The progress of the reaction is monitored by TLC. After completion of the reaction, the reaction mixture is concentrated under reduced pressure to obtain a crude compound.
- Step 3 Synthesis of N-(5-fluoro-1-methyl-1H-1,3-benzodiazol-2-yl)-5- ⁇ [methyl(prop-2- yn-1-yl)amino]methyl ⁇ -1,3-benzoxazol-2-amine
- 5-(chloromethyl)-N-(5-fluoro-1-methyl-1H-1,3-benzodiazol-2-yl)- 1,3-benzoxazol-2-amine 0.2 g, 605 ⁇ mol
- potassium carbonate 167 mg, 1.21 mmol
- methyl(prop-2-yn-1-yl)amine hydrochloride (128 mg, 1.21 mmol
- the resulting reaction mixture is allowed to stir at 75 °C for 2 h in a sealed tube.
- the progress of the reaction monitored by TLC and LCMS.
- the reaction mixture is quenched with DM water (25 mL) and extracted with ethyl acetate (2 x 20 mL). The combined organic layers are dried over anhydrous sodium sulphate and concentrated under reduced pressure to afford a crude compound.
- the crude compound is purified by Prep-HPLC: [column: Inertsil ODS-3 (250 mm x 20 mm x 5 ⁇ m); mobile phase (A): 0.1% ammonia in water; mobile phase (B): acetonitrile; flow rate: 19.0 ml/min; % of B: 0/50,1/50,10/80,13/80,13.1/98,17/98,17.1/50, 19/50).
- the product fractions are concentrated to afford Example 25 (N-(5-fluoro-1-methyl-1H-benzo[d] imidazol-2-yl)benzo[d]oxazol-2- amine) (38 mg, 13%) as an off-white solid.
- reaction mixture is allowed to stir at room temperature for 48 h in a sealed tube.
- the progress of the reaction monitored by TLC and LCMS.
- the reaction mixture is quenched with DM water (30 mL) and extracted with ethyl acetate (2 x 25 mL). The combined organic layers are separated, dried over sodium sulphate, and concentrated under reduced pressure to afford a crude compound.
- Example 26 (2- ⁇ 2-[(5-fluoro-1-methyl-1H-1,3-benzodiazol-2-yl)amino]-1,3-benzoxazol-5-yl ⁇ acetonitrile) as a brown solid (94 mg, 39%).
- LCMS (ES) m/z 322.2 [M+H] + .
- Example 27 Synthesis of ⁇ 2-[(1-cyclopropyl-5-fluoro-1H-1,3-benzodiazol-2-yl)amino]-1,3-benzoxazol-5- yl ⁇ methanol [0216]
- Example 27 is synthesized in Step 6 of the synthesis of Example 18.
- LCMS (ES) m/z 339.2 [M+H] + .
- reaction mixture is allowed to bring to room temperature and stir for 2 h.
- the progress of the reaction is monitored by TLC and LCMS.
- the reaction mixture is diluted with DM water (20 mL) and extracted with dichloromethane (2 x 20 mL). The combined organic layers are separated, dried over anhydrous sodium sulphate, and concentrated under reduced pressure to afford a crude compound.
- Example 29 Synthesis of N-(1-benzyl-5-fluoro-1H-benzo[d]imidazol-2-yl)-5-((dimethylamino) methyl) benzo[d]oxazol-2-amine [0220]
- Example 29 is synthesized in an analogous manner to Example 1, except that benzylamine is used in Step 1.
- LCMS (ES) m/z 416.3 [M+H] + .
- Example 30 Synthesis of 5-((dimethylamino)methyl)-N-(6-fluoro-1-methyl-1H-benzo[d]imidazol-2-yl)-N- methylbenzo[d]oxazol-2-amine [0222]
- Example 30 can be synthesized essentially according to procedures set forth in the preceding examples and Reaction Schemes 1 and 2.
- the reaction mixture is stirred at 60 °C for 4 h.
- the progress of the reaction is monitor by TLC and LCMS.
- the reaction mixture is diluted with DM water (30 mL) and extracted with ethyl acetate (2 x 50 mL).
- the combined organic layers are dried over anhydrous sodium sulphate and concentrated under reduced pressure to obtain a crude compound.
- the crude compound is purified by flash column chromatography using 0-50% ethyl acetate in n-heptane as eluents to afford 5-fluoro-2-iodo-1-methyl-1H-1,3-benzodiazole (250 mg, 30%) as an off-white solid.
- Step 2 Synthesis of methyl 1,3-benzoxazole-5-carboxylate [0227] To a stirred solution of methyl 3-amino-4-hydroxybenzoate (5 g, 29.9 mmol) in triethylorthoformate (50 mL) is added 4-methylbenzene-1-sulfonic acid (515 mg, 2.99 mmol) at room temperature. The reaction mixture is stirred at 120 °C for 16 h in a sealed tube. The progress of the reaction is monitored by TLC and LCMS. After completion of the reaction, the reaction mixture is concentrated under reduced pressure to obtain a crude residue.
- 4-methylbenzene-1-sulfonic acid 515 mg, 2.99 mmol
- Step 3 Synthesis of methyl 2-iodo-1,3-benzoxazole-5-carboxylate [0229] To a stirred solution of methyl 1,3-benzoxazole-5-carboxylate (1 g, 5.64 mmol) in tetrahydrofuran (10 mL) is added lithium(1+) bis(trimethylsilyl)azanide (2.83 g, 16.9 mmol) dropwise at -78 °C under an inert condition and allowed to stir for 1h. After 1 h, iodine (1.07 g, 8.47 mmol) in tetrahydrofuran (5 ml) is added dropwise at -78 °C.
- the reaction mixture is stirred at the same temperature for 2 h. The progress of the reaction is monitored by TLC and LCMS. After completion of the reaction, the reaction mixture is diluted with DM water (40 mL) and extracted with ethyl acetate (2 x 80 mL). The combined organic layers are dried over anhydrous sodium sulphate, filtered, and concentrated under reduced pressure to obtain a crude compound. The crude compound is purified by flash column chromatography using 0- 40% ethyl acetate in n-heptane as eluents to afford methyl 2-iodo-1,3-benzoxazole-5- carboxylate (0.6 g, 35%) as a light yellow solid.
- Step 4 Synthesis of methyl 2-(methylamino)-1,3-benzoxazole-5-carboxylate
- methyl 2-iodo-1,3-benzoxazole-5-carboxylate 0.6 g, 2.97 mmol
- 30% methyl amine in ethanol 366 ⁇ L, 8.91 mmol
- the progress of the reaction is monitored by TLC and LCMS. After completion of the reaction, the reaction mixture is concentrated under reduced pressure to obtain a crude compound.
- the crude compound is purified by flash column chromatography using 0-10% methanol in DCM as eluents to afford methyl 2-(methylamino)-1,3-benzoxazole-5-carboxylate (0.550 g, 98%) as a white solid.
- Step 5 Synthesis of [2-(methylamino)-1,3-benzoxazol-5-yl]methanol
- methyl 2-(methylamino)-1,3-benzoxazole-5-carboxylate 550 mg, 2.67 mmol
- 1M Lithium aluminium hydride in THF 152 mg, 4 mmol
- the reaction mixture is stirred at room temperature for 2 h. The progress of the reaction is monitored by TLC and LCMS.
- Step 6 Synthesis of 5- ⁇ [(tert-butyldimethylsilyl)oxy]methyl ⁇ -N-methyl-1,3-benzoxazol-2- amine
- the reaction mixture is diluted with DM water (25 mL) and extracted with ethyl acetate (2 x 25 mL). The combined organic layers are dried over anhydrous sodium sulphate and concentrated under reduced pressure to obtain a crude compound.
- the crude compound is purified by flash column chromatography using 0-20% ethyl acetate in n-heptane as eluents to afford 5- ⁇ [(tert-butyldimethylsilyl)oxy]methyl ⁇ -N- methyl-1,3-benzoxazol-2-amine (450 mg, 91%) as a brown oil.
- Step 7 Synthesis of 5- ⁇ [(tert-butyldimethylsilyl)oxy]methyl ⁇ -N-(5-fluoro-1-methyl-1H- 1,3-benzodiazol-2-yl)-N-methyl-1,3-benzoxazol-2-amine [0237] To a stirred solution of 5-fluoro-2-iodo-1-methyl-1H-1,3-benzodiazole (150 mg, 513 ⁇ mol) and 6- ⁇ [(tert-butyldimethylsilyl)oxy]methyl ⁇ -N-methyl-1,3-benzoxazol-2-amine (0.1 g, 342 ⁇ mol) in 1,4-dioxane (4 mL) is added cesium carbonate (223 mg, 684 ⁇ mol) at room temperature.
- the reaction mixture is degassed with nitrogen atmosphere for 5 min. After 5 min, tris(1,5-diphenylpenta-1,4-dien-3-one) dipalladium (31.3 mg, 34.2 ⁇ mol) and 5- ⁇ [(tert- butyldimethylsilyl)oxy]methyl ⁇ -N-(5-fluoro-1-methyl-1H-1,3-benzodiazol-2-yl)-N-methyl-1,3- benzoxazol-2-amine (120 mg, 272 ⁇ mol) are added to the reaction mixture. The reaction mixture is stirred at 120 °C for 2 h. The progress of the reaction is monitored by TLC and LCMS.
- reaction mixture is diluted with DM water (30 mL) and extracted with ethyl acetate (2 x 40 mL). The combined organic layers are dried over anhydrous sodium sulphate, filtered, and concentrated under reduced pressure to afford ⁇ s (120 mg, 80%) as an off-white solid.
- Step 8 Synthesis of ⁇ 2-[(5-fluoro-1-methyl-1H-1,3-benzodiazol-2-yl)(methyl)amino]- 1,3-benzoxazol-5-yl ⁇ methanol
- 5- ⁇ [(tert-butyldimethylsilyl)oxy]methyl ⁇ -N-(5-fluoro-1-methyl-1H- 1,3-benzodiazol-2-yl)-N-methyl-1,3-benzoxazol-2-amine 120 mg, 159 ⁇ mol
- tetrabutylazanium fluoride 125 mg, 477 ⁇ mol
- reaction mixture is stirred at room temperature for 2 h. The progress of the reaction is monitored by TLC and LCMS. After completion of the reaction, the reaction mixture is diluted with DM water (30 mL) and extracted with ethyl acetate (2 x 50 mL). The combined organic layers are dried over anhydrous sodium sulphate and concentrated under reduced pressure to afford ⁇ 2-[(5-fluoro-1-methyl-1H-1,3-benzodiazol-2-yl)(methyl)amino]-1,3-benzoxazol-5- yl ⁇ methanol (80 mg, Crude) as an off-white solid.
- Step 9 Synthesis of 5-(chloromethyl)-N-(5-fluoro-1-methyl-1H-1,3-benzodiazol-2-yl)-N- methyl-1,3-benzoxazol-2-amine
- ⁇ 2-[(5-fluoro-1-methyl-1H-1,3-benzodiazol-2-yl)(methyl)amino]- 1,3-benzoxazol-5-yl ⁇ methanol (80 mg, 245 ⁇ mol) in N,N-dimethylformamide (0.2 mL) is added sulfuryl dichloride (43.7 mg, 368 ⁇ mol) at 0 °C.
- the reaction mixture is stirred at room temperature for 1 h.
- Step 10 Synthesis of 5-[(dimethylamino)methyl]-N-(5-fluoro-1-methyl-1H-1,3- benzodiazol-2-yl)-N-methyl-1,3-benzoxazol-2-amine
- 5-(chloromethyl)-N-(5-fluoro-1-methyl-1H-1,3-benzodiazol-2-yl)- N-methyl-1,3-benzoxazol-2-amine 50 mg, 145 ⁇ mol
- potassium carbonate (60.1 mg, 435 ⁇ mol)
- dimethylamine hydrochloride 17.7 mg, 218 ⁇ mol
- reaction mixture is stirred at 80 °C for 2 h.
- the progress of the reaction is monitored by TLC and LCMS.
- the reaction mixture is diluted with DM water (20 mL) and extracted with ethyl acetate (2 x 30 mL). The combined organic layers are dried over anhydrous sodium sulphate and concentrated under reduced pressure to obtain a crude compound.
- Example 31 (5- [(dimethylamino)methyl]-N-(5-fluoro-1-methyl-1H-1,3-benzodiazol-2-yl)-N-methyl-1,3- benzoxazol-2-amine) (18 mg, 35%) as a white solid.
- LCMS (ES) m/z 354.3 [M+H] + .
- Examples 32-35 [0245] Synthesis of Examples 32-35. Examples 32-35 can be synthesized essentially according to procedures set forth in the preceding examples and Reaction Schemes 1 and 2.
- Step 2 Synthesis of 2-chloro-5-fluorobenzo[d]oxazole
- 5-fluoro-1,3-benzoxazole-2-thiol (1 g, 5.91 mmol) in thionyl chloride (8 mL) at 0 °C is added dimethylformamide (1 mL, 12.9 mmol) and stirred for 2 h at room temperature. The progress of the reaction is monitored by TLC and LCMS. After completion of the reaction, the reaction mixture is quenched with saturated sodium bicarbonate solution (40 mL) and extracted with ethyl acetate (2 x 40 mL).
- Step 3 Synthesis of methyl 2-((5-fluorobenzo[d]oxazol-2-yl)amino)-1-methyl-1H- benzo[d] imidazole-5-carboxylate
- 2-chloro-5-fluoro-1,3-benzoxazole 250 mg, 1.46 mmol
- dimethyl sulfoxide 10 mL
- dimethylformamide 1 mL
- sodium hydride 60% dispersion in mineral oil
- reaction mixture is stirred for 20 min at 0 °C. Then methyl 2-amino-1-methyl-1H-1,3-benzodiazole-5- carboxylate (359 mg, 1.75 mmol) is added to the reaction mixture, and the reaction mixture is stirred for 2 h at room temperature. The progress of the reaction is monitored by TLC. After completion of the reaction, the reaction mixture is diluted using cold water (20 mL) and extracted using ethyl acetate (2 x 20 mL).
- Step 4 Synthesis of (2-((5-fluorobenzo[d]oxazol-2-yl)amino)-1-methyl-1H-benzo[d] imidazol-5-yl)methanol
- reaction mixture is quenched with saturated ammonium chloride (15 mL) and extracted with ethyl acetate (2 x 25 mL). The combined organic layers are dried over anhydrous sodium sulphate and concentrated under reduced pressure to afford ⁇ 2-[(5-fluoro- 1,3-benzoxazol-2-yl)amino]-1-methyl-1H-1,3-benzodiazol-5-yl ⁇ methanol as a gummy solid (310 mg, 96%).
- Step 5 Synthesis of N-(5-(chloromethyl)-1-methyl-1H-benzo[d]imidazol-2-yl)-5- fluorobenzo[d]oxazol -2-amine
- ⁇ 2-[(5-fluoro-1,3-benzoxazol-2-yl)amino]-1-methyl-1H-1,3- benzodiazol-6-yl ⁇ methanol (0.3 g, 961 ⁇ mol) in thionyl chloride (6 mL) is added dimethylformamide (0.5 mL) at room temperature and stirred for 2 h. The progress of the reaction is monitored by TLC and LCMS.
- reaction mixture is cooled to 0 °C, neutralized using saturated sodium bicarbonate solution, and extracted using ethyl acetate (2 x 10 mL). The combined organic layers are separated, dried over anhydrous sodium sulphate, and concentrated under reduced pressure to afford N-(5-(chloromethyl)-1- methyl-1H-benzo[d]imidazol-2-yl)-5-fluorobenzo[d]oxazol-2-amine as an off-white solid (160 mg, 50%).
- Step 6 Synthesis of N-(5-((dimethylamino)methyl)-1-methyl-1H-benzo[d]imidazol-2-yl)- 5-fluorobenzo[d]oxazol-2-amine
- N-[5-(chloromethyl)-1-methyl-1H-1,3-benzodiazol-2-yl]-5-fluoro- 1,3-benzoxazol-2-amine 155 mg, 469 ⁇ mol
- dimethylamine hydrochloride 222 mg, 2.72 mmol
- potassium carbonate 188 mg, 1.36 mmol
- the progress of the reaction is monitored by TLC.
- the reaction mixture is diluted with DM water (30 mL) and extracted with ethyl acetate (2 x 30 mL).
- the combined organic layers are dried over anhydrous sodium sulphate, filtered, and concentrated under reduced pressure to obtain a crude.
- Example 36 N- ⁇ 5-[(dimethylamino)methyl]-1-methyl-1H-1,3- benzodiazol-2-yl ⁇ -5-fluoro-1,3-benzoxazol-2-amine) as a white solid (48 mg, 30%).
- LCMS (ES) m/z 338.2 [M-H] -.
- Step 2 Synthesis of ⁇ 2-[(5-fluoro-1,3-benzoxazol-2-yl)amino]-1-methyl-1H-1,3- benzodiazol-6-yl ⁇ methanol
- Compound ⁇ 2-[(5-fluoro-1,3-benzoxazol-2-yl)amino]-1-methyl-1H-1,3-benzodiazol-6- yl ⁇ methanol is synthesized in an analogous manner to Step 6 of the synthesis of Example 1.
- Step 3 Synthesis of N-[6-(chloromethyl)-1-methyl-1H-1,3-benzodiazol-2-yl]-5-fluoro- 1,3-benzoxazol-2-amine
- Compound N-[6-(chloromethyl)-1-methyl-1H-1,3-benzodiazol-2-yl]-5-fluoro-1,3- benzoxazol-2-amine is synthesized in an analogous manner to Step 7 of the synthesis of Example 1.
- Step 4 Synthesis of N- ⁇ 6-[(dimethylamino)methyl]-1-methyl-1H-1,3-benzodiazol-2-yl ⁇ - 5-fluoro-1,3-benzoxazol-2-amine
- Example 37 N- ⁇ 6-[(dimethylamino)methyl]-1-methyl-1H-1,3-benzodiazol-2-yl ⁇ -5- fluoro-1,3-benzoxazol-2-amine
- LCMS (ES) m/z 340.25 [M+H] + .
- Example 38 Synthesis of Synthesis of ⁇ 2-[(5-fluoro-1,3-benzoxazol-2-yl)amino]-1-methyl-1H-1,3- benzodiazol-6-yl ⁇ methanol [0269]
- Example 38 is synthesized in Step 2 of the synthesis of Example 37.
- LCMS (ES) m/z 313.2 [M+H] + .
- Example 39 Synthesis of 5-[(dimethylamino)methyl]-N-(1-ethyl-5-fluoro-1H-1,3-benzodiazol-2-yl)-1,3- benzoxazol-2-amine [0271]
- Example 39 is synthesized in an analogous manner to Example 1, except that ethylamine is used in Step 1.
- LCMS (ES) m/z 354.2 [M+H] + .
- Step 1 to Step -5 are conducted in an analogous manner to Step 1 to Step 5 of the synthesis of Example 1.
- Step 6 Synthesis of 2-((5-fluoro-1-methyl-1H-benzo[d]imidazol-2-yl)amino)benzo[d] oxazole-5-carboxylic acid
- reaction mixture is concentrated under reduced pressure, diluted with DM water (15 mL), acidified using 1N HCl, and then extracted using ethyl acetate (2 x 20 mL). The combined organic layers are dried over anhydrous sodium sulphate and concentrated under reduced pressure to afford 2-[(5-fluoro-1-methyl-1H-1,3-benzodiazol-2-yl)amino]-1,3- benzoxazole-5-carboxylic acid (110 mg, 76%) as an off-white solid.
- Step 7 Synthesis of 2-((5-fluoro-1-methyl-1H-benzo[d]imidazol-2-yl)amino)-N-(2-(2- hydroxyethoxy)ethyl)benzo[d]oxazole-5-carboxamide
- 2-(2-aminoethoxy)ethan-1-ol 48.3 mg, 460 ⁇ mol
- dimethylformamide 5 mL
- ⁇ 3- [cyano(ethyl)amino]propyl ⁇ dimethylazanium chloride 76.4 mg, 398 ⁇ mol
- 1H-1,2,3- benzotriazol-1-ol hydrate 70.4 mg, 460 ⁇ mol
- ethylbis(propan-2-yl)amine 160 ⁇ L, 919 ⁇ mol
- Example 40 (2-[(1,3-benzoxazol-2-yl)amino]-N-[2-(2-hydroxyethoxy)ethyl]-1-methyl-1H-1,3- benzodiazole-5-carboxamide) (29 mg, 36%) as an off-white solid.
- LCMS (ES) m/z 414.3 [M+H] + .
- Example 41 Synthesis of 2-(((2-((5-fluoro-1-methyl-1H-benzo[d]imidazol-2-yl)amino)benzo[d]oxazol-6- yl)methyl)(methyl)amino)ethan-1-ol [0279]
- Example 41 is synthesized in an analogous manner to Example 1, except that 2- (methylamino)ethan-1-ol is used in Step 8.
- LCMS: (ES) m/z 370.2 [M+H].
- Example 42 Synthesis of 1-( ⁇ 2-[(5-fluoro-1-methyl-1H-1,3-benzodiazol-2-yl)amino]-1,3-benzoxazol-5- yl ⁇ methyl)azetidin-3-ol [0281]
- Example 42 is synthesized in an analogous manner to Example 1, except that azetidin-3-ol is used in Step 8.
- LCMS (ES) m/z 368.2 [M+H] + .
- Example 43 Synthesis of N-(5-fluoro-1-methyl-1H-1,3-benzodiazol-2-yl)-5-[(3-methoxyazetidin-1- yl)methyl]-1,3-benzoxazol-2-amine [0283]
- Example 43 is synthesized in an analogous manner to Example 1, except that 3- methoxyazetidine is used in Step 8.
- LCMS (ES) m/z 380.3 [M-H] – .
- Example 44 Synthesis of 5-[(3-aminoazetidin-1-yl)methyl]-N-(5-fluoro-1-methyl-1H-1,3-benzodiazol-2-yl)- 1,3-benzoxazol-2-amine [0285] Step 1 to Step 8 are conducted in an analogous manner to the synthesis of Example 1.
- Step 9 Synthesis of 5-[(3-aminoazetidin-1-yl)methyl]-N-(5-fluoro-1-methyl-1H-1,3- benzodiazol-2-yl)-1,3-benzoxazol-2-amine [0287] To a stirred solution of tert-butyl N-[1-( ⁇ 2-[(5-fluoro-1-methyl-1H-1,3-benzodiazol-2- yl)amino]-1,3-benzoxazol-5-yl ⁇ methyl)azetidin-3-yl]carbamate (150 mg, 322 ⁇ mol) in dichloromethane (3 mL) under an inert condition at 0°C is added 4N dioxane HCl (3.5 mL).
- the resulting reaction mixture is stirred at room temperature for 2 h. The progress of the reaction is monitored by TLC and LCMS. After completion of the reaction, the reaction mixture is concentrated under reduced pressure to obtain a solid. The solid is then purified by Prep- HPLC [column: Inertsil ODS C18 (250x20)mm;5mic; fFlow:-19ml/min; mobile phase (A): 0.1% ammonia in water; mobile phase (B): acetonitrile].
- Example 44 (afford 5-[(3-aminoazetidin-1-yl)methyl]-N-(5-fluoro-1-methyl- 1H-1,3-benzodiazol-2-yl)-1,3-benzoxazol-2-amine) (20 mg, 17%) as a white solid.
- LCMS (ES) m/z 367.3 [M+H] + .
- Example 45 Synthesis of 5- ⁇ [3-(dimethylamino)azetidin-1-yl]methyl ⁇ -N-(5-fluoro-1-methyl-1H-1,3- benzodiazol-2-yl)-1,3-benzoxazol-2-amine [0289]
- Example 45 is synthesized in an analogous manner to Example 1, except that N,N- dimethylazetidin-3-amine is used in Step 8.
- LCMS (ES) m/z 395.3 [M+H] + .
- Example 46 Synthesis of N-(2-(2-hydroxyethoxy)ethyl)-2-((1-methyl-1H-benzo[d]imidazol-2- yl)amino)benzo[d]oxazole-5-carboxamide [0291]
- Example 46 is synthesized in an analogous manner to Example 40.
- LCMS (ES) m/z 396.4 [M+H] + .
- Biological Methods [0292] Cell Culture: The human monocytic THP-1 cell line is purchased from Invivogen (thp- null).
- the human monocytic THP-1 ASC-GFP reporter cell line is purchased from Invivogen (thp-ascgfp).
- the human monocytic THP-1 cell line overexpressing NLRC4 is purchased from Invivogen (thp1-nlrc4).
- the mouse macrophage cell line J774A.1 is purchased from ATCC (TIB-67). Cells are maintained according to the manufacturer’s suggested protocol.
- Human peripheral blood mononuclear cells are isolated from whole blood using Lymphoprep TM density gradient according to the manufacturer’s instructions. PBMCs are used fresh.
- PMA differentiation of THP-1 cells For ASC Spec assays, the human monocytic cell line THP-1 ASC-GFP cells are differentiated into a macrophage-like phenotype using Phorbol 12-myristate 13-acetate (PMA).
- THP-1 cells are suspended at a density of 1-2 x 10 6 cells/mL and supplemented with 100 ng/mL PMA. One hundred thousand cells are seeded into each well of a 96 well plate and incubated for 72 hours. Adherent cells are washed three times with PMA free THP-1 media, then cells are rested for 24 hours in PMA free media.
- NLRP3 Inflammasome and pyroptosis assay in THP-1 Cells THP-1 cells are primed with 300 ng/mL of ultra-pure LPS. One hour later, cells are treated as indicated in figure legend. Three hours post-LPS prime, the NLRP3 inflammasome is activated with 10 PM Nigericin.
- Cell Free Inflammasome Assay Cell free inflammasome activation and Caspase-1 cleavage is assessed as described previously. Briefly, lysates are prepared from THP-1 by hypotonic lysis to a final protein concentration > 7 mg/mL. Lysates are pretreated for 20 minutes with a final concentration of 1 mM of the indicated compound on ice. Inflammasome activation is induced by incubating samples for 60 minutes at 30 °C. Inflammasome activity is assessed through monitoring Caspase-1 cleavage by Western blot.
- NLRP3 Inflammasome activation in PBMCs 2 x 10 5 freshly isolated PBMCs are primed with 300 ng/mL LPS for 1 hour, then treated with a dose titration of the indicated compounds for an additional 2 hours. The NLRP3 inflammasome is then activated by treating cells with 10 ⁇ M nigericin for 2 hours. Inflammasome activity is assessed by IL-1 ⁇ ELISA according to manufacturer’s instructions.
- AIM2 Inflammasome activation in PBMCs 2 x 10 5 freshly isolated PBMCs are transfected with poly dA:dT (100 ng/well) using Lipofectamine 2000 (1 ⁇ L/well) according to the manufacturer’s instructions in order to activate the AIM2 inflammasome. One hour later, cells are treated with a dose titration of the indicated compounds for an additional 17 hours. Inflammasome activity is assessed by IL-1 ⁇ ELISA according to manufacturer’s instructions.
- NLRP1 Inflammasome activation in PBMCs 2 x 10 5 freshly isolated PBMCs are treated with 10 ⁇ M Talabostat, a constitutive repressor of the NLRP1 inflammasome.
- NLRC4 Inflammasome activation PBMCs 2 x 10 5 freshly isolated PBMCs are primed with LPS (300 ng/mL) for 1 hour, then treated with 200 ng/mL NeedleTox [LFn Needle (Invivogen tlrl-ndl) + anthrax protective antigen (List Labs 171E)]. Compounds are added one hour after NeedleTox addition then incubated for an additional 4 hours after which inflammasome activity is assessed by IL-1 ⁇ ELISA according to the manufacturer’s directions.
- THP-1 cells (Invivogen cat# thp-null) are maintained at a density of 0.2-0.8 x 10 6 cells/mL according to the manufacturer’s directions.
- 100,000 cells/well are seeded in 90 ⁇ L of culture media into 96-well plates then treated with 10 ⁇ L of compound prepared at 10X in culture media containing 5% DMSO, for a final DMSO concentration of 0.5% DMSO v/v.
- Cells are incubated for 5 hours at 37°C and 5% CO 2 . Plates are centrifuged for 5 minutes at 500g at room temperature to pellet cells, then media is aspirated, and cells are washed in 100 ⁇ L of PBS.
- NLRP1 Inflammasome Assay in Mouse Macrophages J774A.1 cells (ATCC cat # TIB- 67) are maintained according to the manufacturer’s directions. For NLRP1 activation, cells are used ⁇ passage #12. 100,000 cells/well are seeded in 70 ⁇ L of culture media into 96-well plates and allowed to adhere for 30 minutes at 37 o C and 5% CO 2 . Cells are stimulated with 10 ⁇ L of ultrapure LPS (Invivogen cat# tlrl-3pelps) at 3 ⁇ g/mL for a final concentration of 300 ng/mL. Cells are incubated for 1 hour at 37°C and 5% CO 2 .
- ultrapure LPS Invivogen cat# tlrl-3pelps
- LT lethal toxin
- Anthrax lethal toxin (LT) is prepared 1 ug/mL by adding anthrax lethal factor (List Labs cat # 169L) and anthrax protective antigen (List Labs cat # 171E) to media for a final concentration of 1 ug/mL each.
- Each well is treated with 10 ⁇ L of LT for a final concentration of 100 ng/mL. Cells are incubated for an additional 3 hours at 37°C and 5% CO 2 .
- Plates are centrifuged for 5 minutes at 500g at room temperature to pellet cells, then supernatants are collected and diluted 1:10 in PBS containing 1% BSA, and IL-1 ⁇ is assessed by ELISA according to the manufacturer’s directions (R&D Systems cat# DY401).
- Alamar blue cell viability reagent (ThermoFisher cat# DAL1100) is diluted 1:10 in culture media, then 100 ⁇ L is added to each cell pellet and incubated at 37°C and 5% CO 2 for 3 hours. Plates are read at 570 nm using a reference wavelength of 600 nm, and viability is expressed relative to untreated controls, using culture media for background correction.
- NLRC4 Inflammasome Assay in THP-1 Cells NLRC4 overexpressing THP-1 cells (Invivogen cat # thp1-nlrc4) are maintained according to the manufacturer’s directions at a density of 0.2 – 0.8 x 10 6 cells/mL.
- 100,000 cells/well are seeded in 70 ⁇ L of culture media into 96-well plates and stimulated with 10 ⁇ L of ultrapure LPS (Invivogen cat# tlrl-3pelps) at 3 ⁇ g/mL in culture media for a final concentration of 300 ng/mL. Cells are incubated for 1 hour at 37°C and 5% CO 2 .
- NeedleTox is prepared by mixing anthrax protective antigen (List Labs cat # 171E) to a final concentration of 1250 ng/mL and LFn-Needle (Invivogen cat# tlrl-ndl) to a final concentration of 250 ng/mL. Each well is treated with 10 ⁇ L of NeedleTox for a final concentration of 150 ng/mL. Cells are incubated for an additional 3 hours at 37°C and 5% CO 2 .
- Plates are centrifuged for 5 minutes at 500g at room temperature to pellet cells, then supernatants are collected and diluted 1:10 in PBS containing 1% BSA, and IL-1 ⁇ is assessed by ELISA according to the manufacturer’s directions (R&D Systems cat# DY201).
- Alamar blue cell viability reagent (ThermoFisher cat# DAL1100) is diluted 1:10 in culture media, then 100 ⁇ L is added to each cell pellet and incubated at 37°C and 5% CO 2 for 3 hours. Plates are read at 570 nm using a reference wavelength of 600 nm, and viability is expressed relative to untreated controls, using culture media for background correction.
- Biological Example 1 Cellular Activity Assays [0306] The properties of each compound are assayed in a variety of cellular assays using THP- 1 human monocytic cells. Assessment of IL-1 ⁇ inhibition and protection from pyroptosis are assessed in an NLRP3 inflammasome assay. Results are provided in Table 2. Table 2 [0307] Comparative None compounds are tested and results provided in Table 3. Table 3 Biological Example 2: HO-1 Induction Assays [0308] The properties of each compound are assessed for Hemoxygenase-1 (HO-1) induction in assays using THP-1 human monocytic cells. Results are provided in Table 4.
- ASC oligomerization is monitored using an ASC-GFP THP-1 reporter cell line. Upon inflammasome activation, ASC polymerizes and forms a single large ‘Spec’ per cell. By tagging ASC with GFP these ‘Specs’ are readily observable and the percentage of inflammasome containing cells can be assessed. THP-1 ASC-GFP cells are differentiated using PMA overnight, then rested in PMA-free media for one day. Cells are treated with a dose titration of the indicated drug 2 hours prior to NLRP3 inflammasome activation using nigericin.
- PBMCs peripheral blood mononuclear cells
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