US20160024098A1 - Hybrid necroptosis inhibitors - Google Patents

Hybrid necroptosis inhibitors Download PDF

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Publication number
US20160024098A1
US20160024098A1 US14/776,852 US201414776852A US2016024098A1 US 20160024098 A1 US20160024098 A1 US 20160024098A1 US 201414776852 A US201414776852 A US 201414776852A US 2016024098 A1 US2016024098 A1 US 2016024098A1
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compound
optionally substituted
pharmaceutically acceptable
stereoisomer
acceptable salt
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Junying Yuan
Alexei Degterev
Gregory D. Cuny
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Shanghai Institute of Organic Chemistry of CAS
Harvard College
University of Houston
Tufts University
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Shanghai Institute of Organic Chemistry of CAS
Harvard College
University of Houston
Tufts University
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Assigned to PRESIDENT AND FELLOWS OF HARVARD COLLEGE, SHANGHAI INSTITUTE OF ORGANIC CHEMISTRY, CHINESE ACADEMY OF SCIENCES reassignment PRESIDENT AND FELLOWS OF HARVARD COLLEGE ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: YUAN, JUNYING
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Publication of US20160024098A1 publication Critical patent/US20160024098A1/en
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Definitions

  • necrotic and/or necrotic pathways In many diseases, cell death is mediated through apoptotic and/or necrotic pathways. While much is known about the mechanisms of action that control apoptosis, control of necrosis is not as well understood. Understanding the mechanisms regulating both necrosis and apoptosis in cells is essential to being able to treat conditions, such as neurodegenerative diseases, stroke, coronary heart disease, kidney disease, and liver disease. A thorough understanding of necrotic and apoptotic cell death pathways is also crucial to treating AIDS and the conditions associated with AIDS, such as retinal necrosis.
  • Cell death has traditionally been categorized as either apoptotic or necrotic based on morphological characteristics (Wyllie et al., Int. Rev. Cytol. 68: 251 (1980)). These two modes of cell death were also initially thought to occur via regulated (caspase-dependent) and non-regulated processes, respectively. Subsequent studies, however, demonstrate that the underlying cell death mechanisms resulting in these two phenotypes are much more complicated and, under some circumstances, interrelated. Furthermore, conditions that lead to necrosis can occur by either regulated caspase-independent or non-regulated processes.
  • necroptosis One regulated caspase-independent cell death pathway with morphological features resembling necrosis, called necroptosis, has been described (Degterev et al., Nat. Chem. Biol. 1:112 (2005)). This manner of cell death can be initiated with various stimuli (e.g., TNF- ⁇ and Fas ligand) and in an array of cell types (e.g., monocytes, fibroblasts, lymphocytes, macrophages, epithelial cells and neurons).
  • stimuli e.g., TNF- ⁇ and Fas ligand
  • Necroptosis may represent a significant contributor to and, in some cases, predominant mode of cellular demise under pathological conditions involving excessive cell stress, rapid energy loss, and massive oxidative species generation, where the highly energy-dependent apoptosis process is not operative.
  • necrostatins for anti-necroptosis therapeutics.
  • the discovery of compounds that prevent caspase-independent cell death would also provide useful therapeutic agents for treating or preventing conditions in which necrosis occurs. These compounds and methods would be particularly useful for the treatment of neurodegenerative diseases, ischemic brain and heart injuries, and head trauma.
  • the invention features new compounds, pharmaceutical compositions, kits, and methods for treating a condition in which necrosis or necroptosis is likely to play a substantial role, or those in which RIP1 and/or RIP3 protein is a contributing factor.
  • the invention features a compound of the formula
  • n 0 or 1
  • Het 1 is an optionally substituted heteroaryl
  • L 1 is a covalent bond, —O—, —S—, an optionally substituted C1-C4 alkylene, an optionally substituted C2-C4 alkenylene, an optionally substituted C2-C4 alkynylene, an optionally substituted C3-C6 cycloalkyl, or an optionally substituted three-to-six membered heterocyclyl;
  • L 2 is a covalent bond or an optionally substituted C1-C4 alkylene
  • L 3 is —O—, —S—, or NR 2 ;
  • n is an integer between 0-4;
  • o 0 or 1
  • p is 0 or 1;
  • q is 0 or 1
  • r is 0 or 1;
  • s is 0 or 1;
  • each R 1 when present, is independently optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, optionally substituted C3-C9 cycloalkyl, optionally substituted C5-C9 cycloalkenyl, optionally substituted three- to nine-membered heterocyclyl, optionally substituted C6-C10 aryl, optionally substituted five- to eleven-membered heteroaryl, halogen, —OH, N 3 , NO 2 , —CO 2 H, —NC, or CN; or is a group selected from —OC( ⁇ O)R 4A , —C( ⁇ O)R 4A , —OR 4A , —NR 4A C( ⁇ O)R 4B , —C( ⁇ O)NR 4A R 4B , —NR 4A R 4B , —CO 2 R 4A , —OC( ⁇ O)NR 4
  • R 2 is H or optionally substituted C1-C6 alkyl, or R 2 combines with R 3 to form an optionally substituted C1-C3 alkylene moiety;
  • R 3 is H or optionally substituted C1-C6 alkyl, or R 3 combines with R 2 to form an optionally substituted C1-C3 alkylene moiety;
  • a 1 is a fragment that is
  • the compound has a structure according to one of the following formulas:
  • Het 1 is an optionally substituted indole, azaindole, indazole, imidazopyridine, imidazopyrimidine, pyrrolopyrimidine, pyrrolopyridine, pyrazolopyridine, pyrazolopyrimidine, quinoline, or isoquinoline group.
  • Het 1 is unsubstituted or includes 1 or 2 substituents selected from halogen, CN, NO 2 , optionally substituted C1-C6 alkyl, or optionally substituted C1-C6 alkoxy.
  • Het 1 is selected from the group consisting of
  • any of these heterocycles may be substituted by the replacement or one or more hydrogen groups (e.g., the replacement of one or two hydrogen groups) with a group that is selected, independently, from optionally substituted C1-C6 alkyl, halogen, optionally substituted amino, optionally substituted carboxamido, optionally substituted C1-C6 alkoxy, nitro, and cyano.
  • Het 1 is N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl
  • L 1 is optionally substituted C1-C2 alkylene, optionally substituted C2 alkenylene, C2 alkynylene, or optionally substituted C3-C6 cycloalkyl (e.g., L 1 is —CH 2 CH 2 —, —C ⁇ C—, —CH ⁇ CH—, or unsubstituted cyclopropyl).
  • each R 1 when present, is independently selected from halogen, optionally substituted C1-C6 alkyl, optionally substituted C1-C6 alkoxy, or CN,
  • n is 0 or 1.
  • o is 0 or 1.
  • the compound has a structure according to one of the following formulas,
  • R 1 when present, is optionally substituted C1-C2 alkyl.
  • L 2 is optionally substituted C1-C2 alkylene (e.g., L 2 is CH 2 or CH 2 CH 2 ).
  • R 2 is H.
  • R 3 is H.
  • R 2 and R 3 combine to form an optionally substituted C1-C3 alkylene moiety (e.g., R 2 and R 3 combine to form CH 2 CH 2 ).
  • the compound has a structure according to one of the following formulas:
  • L 1 is —CH 2 CH 2 —, —C ⁇ C—, —CH ⁇ CH—, or unsubstituted cyclopropyl.
  • R 1 when present, is optionally substituted C1-C6 alkyl (e.g., CH 3 ).
  • the compound has a structure according to one of the following formulas,
  • the compound has a structure according to a formula selected from the group consisting of:
  • R Het is optionally substituted amido, in which each substituent is, independently, C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl, C3-C9 cycloalkyl, three- to nine-membered heterocyclyl, C6-C10 aryl, or five- to eleven-membered heteroaryl.
  • R 1 when present, is optionally substituted C1-C6 alkyl (e.g., R 1 is CH 3 ).
  • L 2 is optionally substituted C1-C4 alkylene.
  • n 0 and said compound has the following structure,
  • L 1 is C2 alkynyl.
  • o 0.
  • L 2 is optionally substituted C1 alkylene (e.g., CH 2 ).
  • R 3 is H.
  • a 1 is N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl
  • n 0.
  • R 9 is H or CH 3 .
  • R 10 is H.
  • X 1 and X 2 are both O.
  • X 3 is O.
  • X 3 is NR 11 .
  • R 11 is H.
  • R 6 , R 7 , and R 8 are each H.
  • R 5 is H, halogen, OH, optionally substituted C1-C3 alkyl, or optionally substituted C1-C3 alkoxy (e.g., R 5 is H, Cl, OH, CH 3 , or OCH 3 ).
  • a 1 is N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl
  • R 13 and R 15 are both H
  • R 16 is CN
  • R 14 is H or CH 3 .
  • R 17 is optionally substituted C1-C3 alkyl (e.g., R 17 is CH 3 ).
  • R 19 , R 20 , and R 21 are each H.
  • R 18 and R 22 are each, independently, halogen (e.g., R 18 is fluoro and R 22 is chloro).
  • a 1 is N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl
  • R 9 is H or optionally substituted C1 alkyl
  • R 5 is H, halogen, OH, optionally substituted C1-C3 alkyl, or optionally substituted C1-C3 alkoxy (e.g., R 5 is H, Cl, OH, CH 3 , or OCH 3 ).
  • a 1 is N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl
  • R 18 and R 22 is, independently, H, F, or Cl (e.g., R 18 is F and R 22 is Cl, or R 18 is F and R 22 is H).
  • the compound is selected from the group consisting of:
  • the invention also features the pharmaceutically acceptable salt of any of the compounds (e.g., a compound according to any of formulas (I)-(XXXII) or any of compounds (1)-(41)) described herein, or the stereoisomer of any of the compounds described herein.
  • a pharmaceutically acceptable salt of any of the compounds e.g., a compound according to any of formulas (I)-(XXXII) or any of compounds (1)-(41) described herein, or the stereoisomer of any of the compounds described herein.
  • the invention features a pharmaceutical composition that includes a pharmaceutically acceptable excipient and any of the compounds described herein (e.g., a compound according to any of formulas (I)-(XXXII) or any of compounds (1)-(41)), or any pharmaceutically acceptable salt thereof, or stereoisomer thereof.
  • a pharmaceutically acceptable excipient e.g., a compound according to any of formulas (I)-(XXXII) or any of compounds (1)-(41)
  • any pharmaceutically acceptable salt thereof e.g., a compound according to any of formulas (I)-(XXXII) or any of compounds (1)-(41)
  • the invention features method of treating a condition in a subject, where the method includes the step of contacting any of the compounds (e.g., a compound according to any of formulas (I)-(XXXII) or any of compounds (1)-(41)) or compositions described herein, or any pharmaceutically acceptable salt thereof, or stereoisomer thereof, to the subject in a dosage sufficient to decrease necroptosis,
  • any of the compounds e.g., a compound according to any of formulas (I)-(XXXII) or any of compounds (1)-(41)
  • compositions described herein or any pharmaceutically acceptable salt thereof, or stereoisomer thereof
  • the invention features a method of treating a condition in a subject, said method comprising the step of contacting any of the compounds (e.g., a compound according to any of formulas (I)-(XXXII) or any of compounds (1)-(41)) or compositions described herein, or any pharmaceutically acceptable salt thereof, or stereoisomer thereof, to said subject in a dosage sufficient to modulate RIP1 and/or RIP3 activity, and wherein said condition is one in which RIP1 and/or RIP3 protein is a contributing factor.
  • any of the compounds e.g., a compound according to any of formulas (I)-(XXXII) or any of compounds (1)-(41)
  • compositions described herein or any pharmaceutically acceptable salt thereof, or stereoisomer thereof
  • the methods of the invention can include administering to a subject any of the compounds (e.g., a compound according to any of formulas (I)-(XXXII) or any of compounds (1)-(41)) or compositions described herein, or any pharmaceutically acceptable salt thereof, or stereoisomer thereof.
  • any of the compounds e.g., a compound according to any of formulas (I)-(XXXII) or any of compounds (1)-(41)
  • compositions described herein or any pharmaceutically acceptable salt thereof, or stereoisomer thereof.
  • the condition is a neurodegenerative disease of the central or peripheral nervous system, the result of retinal neuronal cell death, the result of cell death of cardiac muscle, the result of cell death of cells of the immune system; stroke, liver disease, pancreatic disease, the result of cell death associated with renal failure; heart, mesenteric, retinal, hepatic or brain ischemic injury, ischemic injury during organ storage, head trauma, septic shock, coronary heart disease, cardiomyopathy, myocardial infarction, bone avascular necrosis, sickle cell disease, muscle wasting, gastrointestinal disease, tuberculosis, diabetes, alteration of blood vessels, muscular dystrophy, graft-versus-host disease, viral infection, Crohn's disease, ulcerative colitis, asthma, atherosclerosis, a chronic or acute inflammatory condition, pain, or any condition in which alteration in cell proliferation, differentiation or intracellular signaling is a causative factor, or any condition where RIP1 and/or RIP3 protein is a contributing factor.
  • the condition is a neurodegenerative disease of the central or peripheral nervous system.
  • the condition is hepatic or brain ischemic injury, or ischemic injury during organ storage, head trauma, septic shock, or coronary heart disease.
  • the condition is stroke.
  • the condition is myocardial infarction.
  • the condition is pain (e.g., inflammatory pain, diabetic pain, pain associated with a burn, or pain associated with trauma).
  • pain e.g., inflammatory pain, diabetic pain, pain associated with a burn, or pain associated with trauma.
  • the condition is atherosclerosis.
  • the condition is a chronic or acute inflammatory condition (e.g., rheumatoid arthritis, psoriasis, or Stevens-Johnson syndrome).
  • a chronic or acute inflammatory condition e.g., rheumatoid arthritis, psoriasis, or Stevens-Johnson syndrome.
  • the invention features a method of decreasing necroptosis including contacting a cell with any of the compounds or compositions described herein, or any pharmaceutically acceptable salt thereof, or stereoisomer thereof.
  • the invention features a kit that includes
  • the invention features a kit that includes:
  • C 1-4 alkaryl is meant a C 1-4 alkyl group having an optionally substituted aryl or an optionally substituted heteroaryl located at any position of the carbon chain.
  • the C 1-4 alkyl group may be linear or branched and may also be substituted with, for example, 1, 2, 3, 4, or 5 additional substituents as described herein.
  • alkoxy is meant a group having the structure —O (optionally substituted C1-C6 alkyl), where the optionally substituted C1-C6 alkyl may be branched, linear, or cyclic.
  • the C1-C6 alkyl may be substituted or unsubstituted.
  • a substituted C1-C6 alkyl can have, for example, 1, 2, 3, 4, 5, or 6 substituents located at any position.
  • Exemplary alkoxy groups include, but are not limited to, methoxy, ethoxy, propoxy, isopropoxy, tert-butoxy, and the like.
  • C2-C6 alkenyl or “alkenyl” is meant an optionally substituted unsaturated C2-C6 hydrocarbon group having one or more carbon-carbon double bonds.
  • exemplary C2-C6 alkenyl groups include, but are not limited to —CH ⁇ CH (ethenyl), propenyl, 2-propenyl, 2-methyl-1-propenyl, 1-butenyl, 2-butenyl, and the like.
  • a C2-C6 alkenyl may be linear or branched and may be unsubstituted or substituted.
  • a substituted C2-C6 alkenyl may have, for example, 1, 2, 3, 4, 5, or 6 substituents located at any position.
  • C1-C6 alkyl or “alkyl” is meant an optionally substituted C1-C6 saturated hydrocarbon group.
  • An alkyl group may be linear, branched, or cyclic (“cycloalkyl”).
  • alkyl radicals include, but are not limited to, methyl, ethyl, n-propyl, isopropyl, n-butyl, iso-butyl, sec-butyl, sec-pentyl, iso-pentyl, tert-butyl, n-pentyl, neopentyl, n-hexyl, sec-hexyl, n-heptyl, n-octyl, n-decyl, n-undecyl, dodecyl, and the like, which may bear one or more substituents.
  • Substituted alkyl groups may have, for example, 1, 2, 3, 4, 5, or 6 substituents located at any position.
  • C2-C6 alkynyl or “alkynyl” is meant an optionally substituted unsaturated C2-C6 hydrocarbon group having one or more carbon-carbon triple bonds.
  • exemplary C2-C6 alkynyl groups include, but are not limited to ethynyl, 1-propynyl, and the like
  • alkylene alkenylene
  • alkynylene alkynylene
  • alk divalent or trivalent groups having a specified size, typically C1-C2, C1-C3, C1-C4, C1-C6, or C1-C8 for the saturated groups (e.g., alkylene or alk) and C2-C3, C2-C4, C2-C6, or C2-C8 for the unsaturated groups (e.g., alkenylene or alkynylene).
  • saturated groups e.g., alkylene or alk
  • C2-C3, C2-C4, C2-C6, or C2-C8 unsaturated groups
  • C ⁇ O is a C1 alkylene that is substituted by ⁇ O, for example.
  • alkaryl represents an aryl group, as defined herein, attached to the parent molecular group through an alkylene group, as defined herein
  • alkheteroaryl refers to a heteroaryl group, as defined herein, attached to the parent molecular group through an alkylene group, as defined herein.
  • the alkylene and the aryl or heteroaryl group are each optionally substituted as described herein.
  • amino is meant a group having a structure —NR′R′′, where each R′ and R′′ is selected, independently, from H, optionally substituted C1-C6 alkyl, optionally substituted cycloalkyl, optionally substituted heterocyclyl, optionally substituted aryl, optionally substituted heteroaryl, or R′ and R′′ combine to form an optionally substituted heterocyclyl.
  • R′ and R′′ may be unsubstituted or substituted with, for example, 1, 2, 3, 4, 5, or 6 substituents.
  • aryl is meant is an optionally substituted C 6 -C 14 cyclic group with [4n+2] ⁇ electrons in conjugation and where n is 1, 2, or 3.
  • aryls include heteroaryls and, for example, benzene, naphthalene, anthracene, and phenanthrene.
  • Aryls also include bi- and tri-cyclic ring systems in which a non-aromatic saturated or partially unsaturated carbocyclic ring (e.g., a cycloalkyl or cycloalkenyl) is fused to an aromatic ring such as benzene or naphthalene.
  • Exemplary aryls fused to a non-aromatic ring include indanyl, tetrahydronaphthyl. Any aryls as defined herein may be unsubstituted or substituted. A substituted aryl may be optionally substituted with, for example, 1, 2, 3, 4, 5, or 6 substituents located at any position of the ring.
  • aryloxy is meant a group having the structure —O (optionally substituted aryl), where aryl is as defined herein.
  • azido is meant a group having the structure —N 3 .
  • carbamate or “carbamoyl” is meant a group having the structure —OCONR′R′′ or —NR′CO 2 R′′, where each R′ and R′′ is selected, independently, from H, optionally substituted C1-C6 alkyl, optionally substituted cycloalkyl, optionally substituted heterocyclyl, optionally substituted aryl, optionally substituted heteroaryl, or R′ and R′′ combine to form an optionally substituted heterocyclyl.
  • R′ and R′′ may be unsubstituted or substituted with, for example, 1, 2, 3, 4, 5, or 6 substituents.
  • carbonate is meant a group having a the structure —OCO 2 R′, where R′ is selected from H, optionally substituted C1-C6 alkyl, optionally substituted cycloalkyl, optionally substituted heterocyclyl, optionally substituted aryl, or optionally substituted heteroaryl.
  • R′ is selected from H, optionally substituted C1-C6 alkyl, optionally substituted cycloalkyl, optionally substituted heterocyclyl, optionally substituted aryl, or optionally substituted heteroaryl.
  • R′ is selected from H, optionally substituted C1-C6 alkyl, optionally substituted cycloalkyl, optionally substituted heterocyclyl, optionally substituted aryl, or optionally substituted heteroaryl.
  • R′ is not H, R may be unsubstituted or substituted with, for example, 1, 2, 3, 4, 5, or 6 substituents.
  • Carboxamido or “amido” is meant a group having the structure —CONR′R′′ or —NR′C( ⁇ O)R′′, where each R′ and R′′ is selected, independently, from H, optionally substituted C1-C6 alkyl, optionally substituted cycloalkyl, optionally substituted heterocyclyl, optionally substituted aryl, optionally substituted heteroaryl, or R′ and R′′ combine to form an optionally substituted heterocyclyl.
  • R′ and R′′ may be unsubstituted or substituted with, for example, 1, 2, 3, 4, 5, or 6 substituents.
  • carboxylic group is meant a group having the structure —CO 2 R′, where R′ is selected from H, optionally substituted C1-C6 alkyl, optionally substituted cycloalkyl, optionally substituted heterocyclyl, optionally substituted aryl, or optionally substituted heteroaryl.
  • R′ is selected from H, optionally substituted C1-C6 alkyl, optionally substituted cycloalkyl, optionally substituted heterocyclyl, optionally substituted aryl, or optionally substituted heteroaryl.
  • R′ is not H, R may be unsubstituted or substituted with, for example, 1, 2, 3, 4, 5, or 6 substituents.
  • cyano is meant a group having the structure —CN.
  • C 3-10 cycloalkyl or “cycloalkyl” is meant an optionally substituted, saturated or partially unsaturated 3- to 10-membered monocyclic or polycyclic (e.g., bicyclic, or tricyclic) hydrocarbon ring system.
  • a cycloalkyl is polycyclic, the constituent cycloalkyl rings may be fused together, form a spirocyclic structure, or the polycyclic cycloalkyl may be a bridged cycloalkyl (e.g., adamantyl or norbonanyl).
  • cycloalkyls include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, and cycloheptyl. Cycloalkyls may be unsubstituted or substituted. A substituted cycloalkyl can have, for example, 1, 2, 3, 4, 5, or 6 substituents.
  • cycloalkenyl is meant a non-aromatic, optionally substituted 3- to 10-membered monocyclic or bicyclic hydrocarbon ring system having at least one carbon-carbon double bound.
  • a cycloalkenyl may have 1 or 2 carbon-carbon double bonds.
  • Cycloalkenyls may be unsubstituted or substituted.
  • a substituted cycloalkenyl can have, for example, 1, 2, 3, 4, 5, or 6 substituents.
  • Exemplary cycloalkenyls include, but are not limited to, cyclopropenyl, cyclobutenyl, cyclopentenyl, cyclopentadienyl, cyclohexenyl, 1,3-cyclohexadienyl, 1,4-cyclohexadienyl, and the like.
  • an effective amount or “therapeutically effective amount” of an agent is that amount sufficient to effect beneficial or desired results, such as clinical results, and, as such, an effective amount depends upon the context in which it is being applied.
  • an effective amount of an agent is, for example, an amount sufficient to achieve a reduction in necroptosis as compared to the response obtained without administration of the agent.
  • esters is meant a group having a structure selected from —OCOR′, where R′ is selected from H, optionally substituted C1-C6 alkyl, optionally substituted cycloalkyl, optionally substituted heterocyclyl, optionally substituted aryl, or optionally substituted heteroaryl.
  • R′ is not H, R may be unsubstituted or substituted with, for example, 1, 2, 3, 4, 5, or 6 substituents.
  • halogen or “halo” is meant fluorine (—F), chlorine (—Cl), bromine (—Br), or iodine (—I).
  • heteroaryl is mean an aryl group that contains 1, 2, or 3 heteroatoms in the cyclic framework.
  • exemplary heteroaryls include, but are not limited to, furan, thiophene, pyrrole, thiadiazole (e.g., 1,2,3-thiadiazole or 1,2,4-thiadiazole), oxadiazole (e.g., 1,2,3-oxadiazole or 1,2,5-oxadiazole), oxazole, benzoxazole, isoxazole, isothiazole, pyrazole, thiazole, benzthiazole, triazole (e.g., 1,2,4-triazole or 1,2,3-triazole), benzotriazole, pyridines, pyrimidines, pyrazines, quinoline, isoquinoline, purine, pyrazine, pteridine, triazine (e.g, 1,2,3-triazine, 1,2,4-tria
  • heteroaryls include indole, azaindole, indazole, imidazopyridine, imidazopyrimidine, pyrrolopyrimidine, pyrrolopyridine, pyrazolopyridine, pyrazolopyrimidine, quinoline, or isoquinoline groups as described herein.
  • Heteroaryls may be unsubstituted or substituted.
  • Subsituted heteroaryls can have, for example, 1, 2, 3, 4, 5, or 6 subsitutents.
  • heterocyclic or “heterocyclyl” is meant an optionally substituted non-aromatic, partially unsaturated or fully saturated, 3- to 10-membered ring system, which includes single rings of 3 to 8 atoms in size, and polycyclic ring systems (e.g., bi- and tri-cyclic ring systems) which may include an aryl (e.g., phenyl or naphthyl) or heteroaryl group that is fused to a non-aromatic ring (e.g., cycloalkyl, cycloalkenyl, or heterocyclyl), where the ring system contains at least one heteroatom.
  • polycyclic ring systems e.g., bi- and tri-cyclic ring systems
  • aryl e.g., phenyl or naphthyl
  • heteroaryl group e.g., cycloalkyl, cycloalkenyl, or heterocyclyl
  • Heterocyclic rings include those having from one to three heteroatoms independently selected from oxygen, sulfur, and nitrogen, in which the nitrogen and sulfur heteroatoms may optionally be oxidized and the nitrogen heteroatom may optionally be quaternized or substituted.
  • the term heterocylic refers to a non-aromatic 5-, 6-, or 7-membered monocyclic ring wherein at least one ring atom is a heteroatom selected from O, S, and N (wherein the nitrogen and sulfur heteroatoms may be optionally oxidized), and the remaining ring atoms are carbon, the radical being joined to the rest of the molecule via any of the ring atoms.
  • heterocycle is polycyclic
  • the constituent rings may be fused together, form a spirocyclic structure, or the polycyclic heterocycle may be a bridged heterocycle (e.g., quinuclidyl or.
  • exemplary heterocyclics include, but are not limited to, aziridinyl, azetindinyl, 1,3-diazatidinyl, pyrrolidinyl, piperidinyl, piperazinyl, thiranyl, thietanyl, tetrahydrothiophenyl, dithiolanyl, tetrahydrothiopyranyl, oxiranyl, oxetanyl, tetrahydrofuranyl, tetrahydropyranyl, pyranonyl, 3,4-dihydro-2H-pyranyl, chromenyl, 2H-chromen-2-onyl, chromanyl, dioxanyl (e.g., 1,
  • inflammatory condition refers to medical disorders in which inflammation is a causative factor, or in which inflammation is a result (e.g., inflammatory pain associated with rheumatoid arthritis, psoriatic arthritis, psoriatic arthritis, lupus, or other diseases associated with tissue damage).
  • Inflammatory conditions can be chronic or acute, and non-limiting causes of inflammatory conditions include pathogens (e.g., bacterial pathogens or viral infections), tissue injury, persistent foreign bodies, and autoimmune responses.
  • pathogens e.g., bacterial pathogens or viral infections
  • tissue injury e.g., bacterial pathogens or viral infections
  • tissue injury e.g., persistent foreign bodies, and autoimmune responses.
  • inflammation can be related to necrosis or necroptosis, or inflammation can be independent of necrosis or necroptosis.
  • ketone or “acyl” is meant a group having the structure —COR′, where R′ is selected from H, optionally substituted C1-C6 alkyl, optionally substituted cycloalkyl, optionally substituted heterocyclyl, optionally substituted aryl, or optionally substituted heteroaryl.
  • R′ is selected from H, optionally substituted C1-C6 alkyl, optionally substituted cycloalkyl, optionally substituted heterocyclyl, optionally substituted aryl, or optionally substituted heteroaryl.
  • R′ is not H, R may be unsubstituted or substituted with, for example, 1, 2, 3, 4, 5, or 6 substituents.
  • nitro is meant a group having the structure —NO 2 .
  • a “pharmaceutically acceptable excipient” as used herein refers any ingredient other than the compounds described herein (for example, a vehicle capable of suspending or dissolving the active compound) and having the properties of being nontoxic and non-inflammatory in a patient.
  • Excipients may include, for example: antiadherents, antioxidants, binders, coatings, compression aids, disintegrants, dyes (colors), emollients, emulsifiers, fillers (diluents), film formers or coatings, flavors, fragrances, glidants (flow enhancers), lubricants, preservatives, printing inks, sorbents, suspensing or dispersing agents, sweeteners, or waters of hydration.
  • excipients include, but are not limited to: butylated hydroxytoluene (BHT), calcium carbonate, calcium phosphate (dibasic), calcium stearate, croscarmellose, crosslinked polyvinyl pyrrolidone, citric acid, crospovidone, cysteine, ethylcellulose, gelatin, hydroxypropyl cellulose, hydroxypropyl methylcellulose, lactose, magnesium stearate, maltitol, mannitol, methionine, methylcellulose, methyl paraben, microcrystalline cellulose, polyethylene glycol, polyvinyl pyrrolidone, povidone, pregelatinized starch, propyl paraben, retinyl palmitate, shellac, silicon dioxide, sodium carboxymethyl cellulose, sodium citrate, sodium starch glycolate, sorbitol, starch (corn), stearic acid, stearic acid, sucrose, talc, titanium dioxide, vitamin A, B
  • pharmaceutically acceptable salt represents those salts which are, within the scope of sound medical judgment, suitable for use in contact with the tissues of humans and animals without undue toxicity, irritation, allergic response and the like and are commensurate with a reasonable benefit/risk ratio.
  • Pharmaceutically acceptable salts are well known in the art. For example, S. M. Berge et al. describe pharmaceutically acceptable salts in detail in J. Pharmaceutical Sciences, 1977, 66:1-19.
  • the salts can be prepared in situ during the final isolation and purification of the compounds of the invention or separately by reacting the free base group with a suitable organic acid.
  • Representative acid addition salts include acetate, adipate, alginate, ascorbate, aspartate, benzenesulfonate, benzoate, bisulfate, borate, butyrate, camphorate, camphersulfonate, citrate, cyclopentanepropionate, digluconate, dodecylsulfate, ethanesulfonate, fumarate, glucoheptonate, glycerophosphate, hemisulfate, heptonate, hexanoate, hydrobromide, hydrochloride, hydroiodide, 2-hydroxy-ethanesulfonate, lactobionate, lactate, laurate, lauryl sulfate, malate, maleate, malonate, methanesulfonate, 2-naphthalenesulfonate, nicotinate, nitrate, oleate, oxalate, palmitate, pamoate, pe
  • alkali or alkaline earth metal salts include sodium, lithium, potassium, calcium, magnesium and the like, as well as nontoxic ammonium, quaternary ammonium, and amine cations, including, but not limited to ammonium, tetramethylammonium, tetraethylammonium, methylamine, dimethylamine, trimethylamine, triethylamine, ethylamine and the like.
  • solvates refers to compounds that retain non-covalent associations to residual solvent molecules in the solid state.
  • solvates may be prepared by crystallization, recrystallization, or precipitation from a solution that includes organic solvents, water, or a mixture thereof.
  • Solvates include, but are not limited to, compounds that include solvent molecules in the crystal lattice following recrystallization.
  • the molecular stoichiometry of solvation can vary from, for example, 1:1 solvent:compound to 10:1 solvent:compound. These ratios can include a mixture of associated solvent molecules.
  • NMP N-methylpyrrolidinone
  • DMSO dimethyl sulfoxide
  • DMF dimethylacetamide
  • DMAC dimethylacetamide
  • DMEU 1,3-dimethyl-2-imidazolidinone
  • DMPU 1,3-dimethyl-3,
  • composition a composition containing a compound of the invention, formulated with a pharmaceutically acceptable excipient, and manufactured or sold with the approval of a governmental regulatory agency as part of a therapeutic regimen for the treatment of disease in a mammal. Excipients consisting of DMSO are specifically excluded.
  • Pharmaceutical compositions can be formulated, for example, for oral administration in unit dosage form (e.g., a tablet, capsule, caplet, gelcap, or syrup); for topical administration (e.g., as a cream, gel, lotion, or ointment); for intravenous administration (e.g., as a sterile solution free of particulate emboli and in a solvent system suitable for intravenous use); or any other formulation described herein.
  • stereoisomer is meant a diastereomer, enantiomer, or epimer of a compound.
  • a chiral center in a compound may have the S-configuration or the R-configuration.
  • Enantiomers may also be described by the direction in which they rotate polarized light (i.e., (+) or ( ⁇ )).
  • Diastereomers of a compound include stereoisomers in which some, but not all, of the chiral centers have the opposite configuration as well as those compounds in which substituents are differently oriented in space (for example, trans versus cis).
  • substituents which themselves may be substituted, include, but are not limited to: C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl, C3-C9 cycloalkyl, C5-C9 cycloalkenyl, three- to nine-membered heterocyclyl, C6-C10 aryl, five- to eleven-membered heteroaryl, halogen; azido (—N 3 ), nitro (—NO 2 ), cyano (—CN), acyloxy (—OC( ⁇ O)R′), acyl (—C( ⁇ O)R′), alkoxy (—OR′), amido (—NR′C( ⁇ O)R′′ or —C( ⁇ O)NRR′), amino (—NRR′), carboxylic acid (—CO 2 H), carboxylic ester (—CO 2 R′), carbamoy
  • a substituted group may have, for example, 1, 2, 3, 4, 5, 6, 7, 8, or 9 substituents.
  • each hydrogen in a group may be replaced by a substituent group (e.g., perhaloalkyl groups such as —CF 3 or —CF 2 CF 3 or perhaloaryls such as —C 6 F 5 ).
  • a substituent group may itself be further substituted by replacing a hydrogen of said substituent group with another substituent group such as those described herein. Substituents may be further substituted with, for example, 1, 2, 3, 4, 5, or 6 substituents as defined herein.
  • a lower C1-C6 alkyl or an aryl substituent group e.g., heteroaryl, phenyl, or naphthyl
  • aryl substituent group e.g., heteroaryl, phenyl, or naphthyl
  • 1, 2, 3, 4, 5, or 6 substituents as described herein.
  • FIG. 1 is a chart showing 1 H NMR spectrum of compound 1 in DMSO-d 6 .
  • FIG. 2 is a chart showing 1 H NMR spectrum of compound 2 in DMSO-d 6 .
  • FIG. 3 is a chart showing 1 H NMR spectrum of compound 3 in DMSO-d 6 .
  • FIG. 4 is a chart showing 1 H NMR spectrum of compound 8 in DMSO-d 6 .
  • FIG. 5 is a chart showing 1 H NMR spectrum of compound 28 in DMSO-d 6 .
  • FIG. 6 is a chart showing 1 H NMR spectrum of compound 29 in CDCl 3 .
  • FIG. 7 is a chart showing 1 H NMR spectrum of compound 30 in CDCl 3 .
  • FIG. 8 is a chart showing 1 H NMR spectrum of compound 31 in DMSO-d 6 .
  • FIG. 9 is a chart showing 1 H NMR spectrum of compound 32 in CDCl 3 .
  • FIG. 10 is a chart showing 1 H NMR spectrum of compound 33 in DMSO-d 6 .
  • FIG. 11 is a chart showing 1 H NMR spectrum of compound 34 in DMSO-d 6 .
  • FIG. 12 is a chart showing 1 H NMR spectrum of compound 35 in DMSO-d 6 .
  • FIG. 13 is a chart showing 1 H NMR spectrum of compound 36 in d 4 -methanol.
  • FIG. 14 is a chart showing 1 H NMR spectrum of compound 37 in DMSO-d 6 .
  • FIG. 15 is a chart showing 1 H NMR spectrum of compound 38 in DMSO-d 6 .
  • FIG. 16 is a chart showing 1 H NMR spectrum of compound 40 in DMSO-d 6 .
  • FIG. 17 is a chart showing 1 H NMR spectrum of compound 41 in DMSO-d 6 .
  • heterocyclic derivatives that can inhibit tumor necrosis factor alpha (TNF- ⁇ )-induced necroptosis.
  • the heterocyclic compounds of the invention are described by, e.g., any of Formulas (I)-(XXXII) and include compounds (1)-(41), and can inhibit TNF- ⁇ induced necroptosis in FADD-deficient variant of human Jurkat T cells.
  • Pharmaceutical compositions including the compounds of the invention are also described.
  • the invention also features kits and methods of treatment featuring the compounds and compositions of the invention.
  • the present invention features compounds, pharmaceutical compositions, kits, and methods for treating a range of conditions, e.g., those in which cell or tissue necrosis is a causative factor or result, those in which loss of proliferative capacity is a causative factor or a result, those in which cytokines of the TNF ⁇ family are a causative factor or a result, and those in which RIP1 and/or RIP3 protein is a contributing factor.
  • the compounds of the present invention can be used, for example, as therapeutics to decrease necrosis in a desired cell, to increase cell proliferation, to stimulate immune response, or to modulate inflammation and associated conditions.
  • the compounds of the present invention e.g., a compound according to any of formulas (I)-(XXXII) or any of compounds (1)-(41)
  • Exemplary a conditions in which the compounds of the invention can be useful for treatment include, but are not limited to: neurodegenerative diseases of the central or peripheral nervous system; the result of retinal neuronal cell death; the result of cell death of cardiac muscle; the result of cell death of cells of the immune system; stroke; liver disease; pancreatic disease; the result of cell death associated with renal failure; heart, mesenteric, retinal, hepatic or brain ischemic injury; ischemic injury during organ storage; head trauma; septic shock; coronary heart disease; cardiomyopathy; bone avascular necrosis; sickle cell disease; muscle wasting; gastrointestinal disease; tuberculosis; diabetes; alteration of blood vessels; muscular dystrophy; graft-versus-host disease; viral infection; Crohn's disease; ulcerative colitis; asthma; atherosclerosis; pain (e.g., inflammatory pain, diabetic pain, or pain associated from trauma or burn); chronic or acute inflammatory conditions such as rheumatoid arthritis, psoriasis
  • the invention features compounds that can be described generally by Formula (I)
  • n 0 or 1
  • Het 1 is an optionally substituted heteroaryl
  • L 1 is a covalent bond, —O—, —S—, an optionally substituted C1-C4 alkylene, an optionally substituted C2-C4 alkenylene, an optionally substituted C2-C4 alkynylene, an optionally substituted C3-C6 cycloalkyl, or an optionally substituted three-to-six membered heterocyclyl;
  • L 2 is a covalent bond or an optionally substituted C1-C4 alkylene
  • L 3 is —O—, —S—, or NR 2 ;
  • n is an integer between 0-4;
  • o 0 or 1
  • p is 0 or 1;
  • q is 0 or 1
  • r is 0 or 1;
  • s is 0 or 1;
  • each R 1 when present, is independently optionally substituted C1-C6 alkyl, optionally substituted C2-C6 alkenyl, optionally substituted C2-C6 alkynyl, optionally substituted C3-C9 cycloalkyl, optionally substituted C5-C9 cycloalkenyl, optionally substituted three- to nine-membered heterocyclyl, optionally substituted C6-C10 aryl, optionally substituted five- to eleven-membered heteroaryl, halogen, —OH, N 3 , NO 2 , —CO 2 H, —NC, or CN; or is a group selected from —OC( ⁇ O)R 4A , —C( ⁇ O)R 4A , —OR 4A , —NR 4A C( ⁇ O)R 4B , —C( ⁇ O)NR 4A R 4B , —NR 4A R 4B , —CO 2 R 4A , —OC( ⁇ O)NR 4
  • R 2 is H or optionally substituted C1-C6 alkyl, or R 2 combines with R 3 to form an optionally substituted C1-C3 alkylene moiety;
  • R 3 is H or optionally substituted C1-C6 alkyl, or R 3 combines with R 2 to form an optionally substituted C1-C3 alkylene moiety;
  • a 1 is a fragment that is
  • R 10 is H or optionally substituted C1-C6 alkyl
  • R Het is optionally substituted amido, in which each substituent is, independently, C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl, C3-C9 cycloalkyl, three- to nine-membered heterocyclyl, C6-C10 aryl, or five- to eleven-membered heteroaryl.
  • substructure A1 is one of the following enantiomers
  • Table 1 also provides exemplary substructures A1 which can be prepared by, e.g., adapting methods known in the art.
  • Substructure A1 Still other compounds that can be featured as Substructure A1 are provided in Table 2. These compounds can be prepared by, e.g., adapting methods known in the art for synthesis of the parent pyrrole compounds such as those described in U.S. Pat. No. 8,278,344 and U.S. Patent Application Publication No. 2012/0309795, each of which is incorporated by reference.
  • RIP1 is a unique death domain-containing kinase that has been shown to interact with Fas and TNFR1.
  • RIP1 contains a N-terminal kinase domain with homology to both Ser/Thr and tyrosine kinases, a C-terminal death domain, and an intermediate domain (IM). Its kinase activity is not required for DR-induced apoptosis nor NF ⁇ B activation, which is regulated by the intermediate domain (IM) of RIP.
  • RIP contributes to a wide range of cellular regulatory paradigms, including cytokines, e.g., TNF ⁇ and IL-1 ⁇ , and Toll-like receptor 3 and 4 mediated induction of NFkB.
  • RIP1 kinase activity of RIP1 is essential for the alternative necrotic cell death pathway mediated by FasL, TNF ⁇ and TRAIL, which we subsequently termed necroptosis (see, e.g., U.S. Pat. No. 8,324,262, and references cited therein, each of which is incorporated by reference). Analysis has been undertaken of the domains of RIP required for the death receptor-induced necroptosis in RIP-deficient clone of Jurkat cells, which are otherwise insensitive to this pathway due to the lack of RIP.
  • screening assays may be performed in which RIP1 is utilized as a target, and candidate compounds are assayed for their ability to bind to or otherwise inhibit RIP1.
  • assays that measure inhibition of autophosphorylation of RIP1 can be used.
  • assays that measure binding of a candidate compound to RIP1 are useful in the methods of the invention.
  • Many other variations of binding assays are known in the art and can be employed.
  • RIP1 binding assays are described, e.g., in U.S. Pat. No. 6,211,337, which is hereby incorporated by reference.
  • screening assays can be performed using multiple targets. For example, for a given candidate compound, the binding, autophosphorylation, or other measure of target activity may be assayed for both RIP1 and RIP2, or alternatively both RIP1 and RIP3, and the results compared.
  • Candidate compounds that exert a greater effect on RIP1 than RIP2, RIP3, or another homologue or other molecule chosen for this purpose, are considered to be specific for RIP1, and may be particularly desirable in the methods of the invention.
  • Other assays are known in the art, and any method for measuring protein interactions or inhibition of the activity of a target molecule (e.g., RIP1) may be utilized.
  • Such methods include, but are not limited to fluorescence polarization assays, mass spectrometry (Nelson and Krone, J. Mol. Recognit., 12:77-93, 1999), surface plasmon resonance (Spiga et al., FEBS Lett., 511:33-35, 2002; Rich and Mizka, J. Mol. Recognit., 14:223-228, 2001; Abrantes et al., Anal. Chem., 73:2828-2835, 2001), fluorescence resonance energy transfer (FRET) (Bader et al., J. Biomol. Screen, 6:255-264, 2001; Song et al., Anal. Biochem.
  • FRET fluorescence resonance energy transfer
  • Compounds of the invention can be formulated into pharmaceutical compositions for administration to human subjects in a biologically compatible form suitable for administration in vivo.
  • the present invention provides a pharmaceutical composition comprising a compound of the invention in admixture with a pharmaceutically acceptable excipient.
  • Conventional procedures and ingredients for the selection and preparation of suitable formulations are described, for example, in Remington's Pharmaceutical Sciences (2003-20 th edition) and in The United States Pharmacopeia: The National Formulary (USP 24 NF19), published in 1999.
  • the compounds of the invention may be used in the form of the free base, in the form of salts, solvates, and as prodrugs. All forms are within the scope of the invention.
  • the described compounds or salts, solvates, or prodrugs thereof may be administered to a patient in a variety of forms depending on the selected route of administration, as will be understood by those skilled in the art.
  • the compounds of the invention may be administered, for example, by oral, parenteral, buccal, sublingual, nasal, rectal, patch, pump, or transdermal administration and the pharmaceutical compositions formulated accordingly.
  • Parenteral administration includes intravenous, intraperitoneal, subcutaneous, intramuscular, transepithelial, nasal, intrapulmonary, intrathecal, rectal, and topical modes of administration. Parenteral administration may be by continuous infusion over a selected period of time.
  • Pharmaceutically acceptable excipients may include, for example: antiadherents, antioxidants, binders, coatings, compression aids, disintegrants, dyes (colors), emollients, emulsifiers, fillers (diluents), film formers or coatings, flavors, fragrances, glidants (flow enhancers), lubricants, preservatives, printing inks, sorbents, suspensing or dispersing agents, sweeteners, or waters of hydration.
  • excipients include, but are not limited to: butylated hydroxytoluene (BHT), calcium carbonate, calcium phosphate (dibasic), calcium stearate, croscarmellose, crosslinked polyvinyl pyrrolidone, citric acid, crospovidone, cysteine, ethylcellulose, gelatin, hydroxypropyl cellulose, hydroxypropyl methylcellulose, lactose, magnesium stearate, maltitol, mannitol, methionine, methylcellulose, methyl paraben, microcrystalline cellulose, polyethylene glycol, polyvinyl pyrrolidone, povidone, pregelatinized starch, propyl paraben, retinyl palmitate, shellac, silicon dioxide, sodium carboxymethyl cellulose, sodium citrate, sodium starch glycolate, sorbitol, starch (corn), stearic acid, stearic acid, sucrose, talc, titanium dioxide, vitamin A, B
  • a compound of the invention may be orally administered, for example, with an inert diluent or with an assimilable edible carrier, or it may be enclosed in hard or soft shell gelatin capsules, or it may be compressed into tablets, or it may be incorporated directly with the food of the diet.
  • a compound of the invention may be incorporated with an excipient and used in the form of ingestible tablets, buccal tablets, troches, capsules, elixirs, suspensions, syrups, wafers, and the like.
  • a compound of the invention may also be administered parenterally.
  • the pharmaceutical forms suitable for injectable use include sterile aqueous solutions or dispersions and sterile powders for the extemporaneous preparation of sterile injectable solutions or dispersions. In all cases the form must be sterile and must be fluid to the extent that may be easily administered via syringe.
  • compositions for nasal administration may conveniently be formulated as aerosols, drops, gels, and powders.
  • Aerosol formulations typically include a solution or fine suspension of the active substance in a physiologically acceptable aqueous or non-aqueous solvent and are usually presented in single or multidose quantities in sterile form in a sealed container, which can take the form of a cartridge or refill for use with an atomizing device.
  • the sealed container may be a unitary dispensing device, such as a single dose nasal inhaler or an aerosol dispenser fitted with a metering valve which is intended for disposal after use.
  • the dosage form comprises an aerosol dispenser
  • a propellant which can be a compressed gas, such as compressed air or an organic propellant, such as fluorochlorohydrocarbon.
  • the aerosol dosage forms can also take the form of a pump-atomizer.
  • compositions suitable for buccal or sublingual administration include tablets, lozenges, and pastilles, where the active ingredient is formulated with a carrier, such as sugar, acacia, tragacanth, or gelatin and glycerine.
  • a carrier such as sugar, acacia, tragacanth, or gelatin and glycerine.
  • Compositions for rectal administration are conveniently in the form of suppositories containing a conventional suppository base, such as cocoa butter.
  • the compounds of the invention may be administered to an animal alone or in combination with pharmaceutically acceptable carriers, as noted above, the proportion of which is determined by the solubility and chemical nature of the compound, chosen route of administration, and standard pharmaceutical practice.
  • the amount of active ingredient in the compositions of the invention can be varied.
  • dosage levels of between 0.1 ⁇ g/kg to 100 mg/kg of body weight are administered daily as a single dose or divided into multiple doses.
  • the general dosage range is between 250 ⁇ g/kg to 5.0 mg/kg of body weight per day. Wide variations in the needed dosage are to be expected in view of the differing efficiencies of the various routes of administration.
  • oral administration generally would be expected to require higher dosage levels than administration by intravenous injection. Variations in these dosage levels can be adjusted using standard empirical routines for optimization, which are well known in the art. In general, the precise therapeutically effective dosage will be determined by the attending physician in consideration of the above identified factors.
  • Cell death has traditionally been categorized as either apoptotic or necrotic based on morphological characteristics (Wyllie et al., Int. Rev. Cytol. 68: 251 (1980)). These two modes of cell death were also initially thought to occur via regulated (caspase-dependent) and non-regulated processes, respectively. Subsequent studies, however, demonstrate that the underlying cell death mechanisms resulting in these two phenotypes are much more complicated and under some circumstances interrelated. Furthermore, conditions that lead to necrosis can occur by either regulated caspase-independent or non-regulated processes.
  • necroptosis One regulated caspase-independent cell death pathway with morphological features resembling necrosis, called necroptosis, has been described (Degterev et al., Nat. Chem. Biol. 1:112 (2005)). This manner of cell death can be initiated with various stimuli (e.g., TNF- ⁇ and Fas ligand) and in an array of cell types (e.g., monocytes, fibroblasts, lymphocytes, macrophages, epithelial cells and neurons).
  • TNF- ⁇ and Fas ligand e.g., monocytes, fibroblasts, lymphocytes, macrophages, epithelial cells and neurons.
  • Necroptosis may represent a significant contributor to and in some cases predominant mode of cellular demise under pathological conditions involving excessive cell stress, rapid energy loss and massive oxidative species generation, where the highly energy-dependent apoptosis process is not operative.
  • necrostatins are compounds that prevent caspase-independent cell death (e.g., necrosis or necroptosis) for anti-necroptosis therapeutics.
  • necrostatins can suppress necroptosis by specifically inhibiting receptor interacting protein 1 (RIP1) activity (e.g., Xie et al., Structure, 21(3):493-499, 2013).
  • RIP1 receptor interacting protein 1
  • RIP3 which is a RIP1 family member, has also been implicated in necroptosis (see, e.g., Christofferson et al., Curr. Opin. Cell Biol. 22(2):263-268, 2010). Accordingly, methods by which RIP1 and/or RIP3 activity can be modulated can also be useful for the treatment of conditions in which RIP1 and/or RIP3 protein is a contributing factor.
  • the compounds and compositions disclosed herein can be used to treat disorders where necroptosis is likely to play a substantial role or where RIP1 and/or RIP3 protein is a contributing factor.
  • Exemplary conditions that can be treated using the methods described herein include: cerebral ischemia, traumatic brain injury (Gennarelli et al. In Textbook of Traumatic Brain Injury ; Silver et al., Eds.; American Psychiatric Publishing Inc.: Washington DC, 2005; p 37), a neurodegenerative disease of the central or peripheral nervous system (Martin et al. Brain Res. Bull.
  • organ ischemia such as stroke (Lo et al. Nat. Rev. Neurosci. 2003, 4, 399), myocardial infarction (McCully et al. Am. J. Physiol. Heart Circ. Physiol. 2004, 286, H1923), or retinal ischemia (Osborne et al. Prog. Retin. Eye Res. 2004, 23, 91); liver disease (Kaplowitz, J. Hepatol. 2000, 32 (1 Suppl.), 39; Malhi et al. Hepatology 2006, 43 (2 Suppl.
  • pancreatic disease the result of cell death associated with renal failure; heart, mesenteric, retinal, hepatic or brain ischemic injury, ischemic injury during organ storage, head trauma, septic shock, coronary heart disease, cardiomyopathy, myocardial infarction, bone avascular necrosis, sickle cell disease, muscle wasting, gastrointestinal disease, tuberculosis, diabetes, alteration of blood vessels, muscular dystrophy, graft-versus-host disease, viral infection, Crohn's disease, ulcerative colitis, asthma, or any condition in which alteration in cell proliferation, differentiation or intracellular signaling is a causative factor; cancer chemo/radiation therapy-induced necrosis (Giglio et al.
  • Atherosclerosis e.g, Lin et al., Cell Reports, 3:200-210, 2013
  • inflammatory conditions e.g., Wallach et al., Trends in Immunology, 32(11):505-509, 2011; Kang et al., Immunity, 38:27-40, 2013; and Chan, Cold Spring Harb. Perspect. Biol., 1-12, 2012.
  • Compounds of the invention can also be used in screening methods to identify targets of necroptosis and to identify additional inhibitors of necroptosis, as well as in assay development.
  • the compounds e.g., a compound according to any of formulas (I)-(XXXII) or any of compounds (1)-(41)
  • compositions disclosed herein can be evaluated for their pharmacological properties in animal models of disease.
  • the compounds identified to decrease necrosis or necroptosis may be structurally modified and subsequently used to decrease necrosis or necroptosis, or to treat a subject with a condition in which necrosis or necroptosis occurs.
  • the methods used to generate structural derivatives of the small molecules that decrease necrosis or necroptosis are readily known to those skilled in the fields of organic and medicinal chemistry.
  • Treatment may be performed alone or in conjunction with another therapy, for example in combination with apoptosis inhibitors, and may be provided at home, the doctor's office, a clinic, a hospital's outpatient department, or a hospital. Treatment generally begins at a hospital so that the doctor can observe the therapy's effects closely and make any adjustments that are needed. The duration of the therapy depends on the age and condition of the patient, as well as how the patient responds to the treatment. Additionally, a person having a greater risk of developing a condition may receive prophylactic treatment to inhibit or delay symptoms of the disease.
  • the compounds e.g., compounds having a structure according to any of Formulas (I)-(VIII), or any of compounds (1)-(20)
  • compositions described herein can be used to treat any of the following disorders where necroptosis is likely to play a substantial role: a neurodegenerative disease of the central or peripheral nervous system, the result of retinal neuronal cell death, the result of cell death of cardiac muscle, the result of cell death of cells of the immune system; stroke, liver disease, pancreatic disease, the result of cell death associated with renal failure; heart, mesenteric, retinal, hepatic or brain ischemic injury, ischemic injury during organ storage, head trauma, septic shock, coronary heart disease, cardiomyopathy, myocardial infarction, bone avascular necrosis, sickle cell disease, muscle wasting, gastrointestinal disease, tuberculosis, diabetes, alteration of blood vessels, muscular dystrophy, graft-versus-host disease, viral infection, bacterial infection, Crohn's disease
  • Conditions in which alteration in cell proliferation, differentiation or intracellular signaling is a causative factor include cancer and infection, e.g., by viruses (e.g., acute, latent and persistent), bacteria, fungi, or other microbes.
  • viruses e.g., acute, latent and persistent
  • bacteria e.g., fungi, or other microbes.
  • Exemplary viruses are human immunodeficiency virus (HIV), Epstein-Barr virus (EBV), cytomegalovirus (CMV)5 human herpesviruses (HHV), herpes simplex viruses (HSV), human T-Cell leukemia viruses (HTLV)5 Varicella-Zoster virus (VZV), measles virus, papovaviruses (JC and BK), hepatitis viruses, adenovirus, parvoviruses, and human papillomaviruses.
  • Exemplary diseases caused by viral infection include, but are not limited to, chicken pox, Cytomegalovirus infections, genital herpes, Hepatitis B and C, influenza, and shingles.
  • Exemplary bacteria include, but are not limited to Campylobacter jejuni, Enterobacter species, Enterococcus faecium, Enterococcus faecalis, Escherichia coli (e.g., E. coli O 157:H7), Group A streptococci, Haemophilus influenzae, Helicobacter pylori, listeria, Mycobacterium tuberculosis, Pseudomonas aeruginosa, S. pneumoniae, Salmonella, Shigella, Staphylococcus aureus , and Staphylococcus epidermidis .
  • Campylobacter jejuni Enterobacter species
  • Enterococcus faecium Enterococcus faecalis
  • Escherichia coli e.g., E. coli O 157:H7
  • Group A streptococci Haemophilus influenzae
  • Helicobacter pylori listeria
  • Exemplary diseases caused by bacterial infection include, but are not limited to, anthrax, cholera, diphtheria, foodborne illnesses, leprosy, meningitis, peptic ulcer disease, pneumonia, sepsis, tetanus, tuberculosis, typhoid fever, and urinary tract infection.
  • neurodegenerative diseases are Alzheimer's disease, Huntington's disease, Parkinson's disease, amyotrophic lateral sclerosis, HIV-associated dementia, cerebral ischemia, amyotropic lateral sclerosis, multiple sclerosis, Lewy body disease, Menke's disease, Wilson's disease, Creutzfeldt-Jakob disease, Fahr disease, and progressive supranuclear palsy.
  • Exemplary muscular dystrophies or related diseases are Becker's muscular dystrophy, Duchenne muscular dystrophy, myotonic dystrophy, limb-girdle muscular dystrophy, Landouzy-Dejerine muscular dystrophy, facioscapulohumeral muscular dystrophy (Steinert's disease), myotonia congenita, Thomsen's disease, and Pompe's disease.
  • Muscle wasting can be associated with cancer, AIDS, congestive heart failure, and chronic obstructive pulmonary disease, as well as include necrotizing myopathy of intensive care.
  • Exemplary neurodegenerative conditions are Alzheimer's disease, Huntington's disease, Parkinson's disease, amyotrophic lateral sclerosis, HIV-associated dementia, cerebral ischemia, amyotropic lateral sclerosis, multiple sclerosis, Lewy body disease, Menke's disease, Wilson's disease, Creutzfeldt-Jakob disease, Fahr disease, and progressive supranuclear palsy.
  • Exemplary muscular dystrophies or related diseases are Becker's muscular dystrophy, Duchenne muscular dystrophy, myotonic dystrophy, limb-girdle muscular dystrophy, Landouzy-Dejerine muscular dystrophy, facioscapulohumeral muscular dystrophy (Steinert's disease), myotonia congenita, Thomsen's disease, and Pompe's disease.
  • Muscle wasting can be associated with cancer, AIDS, congestive heart failure, and chronic obstructive pulmonary disease, as well as include necrotizing myopathy of intensive care
  • the compounds and compositions described herein can additionally be used to boost the immune system, whether or not the patient being treated has an immunocompromising condition.
  • the compounds described herein can be used in a method to strengthen the immune system during immunization, e.g., by functioning as an adjuvant, or by being combined with an adjuvant.
  • inflammatory conditions which may be, e.g., chronic or acute.
  • inflammatory conditions include: alkylosing spondylitis, arthritis (e.g., osteoarthritis, rheumatoid arthritis (RA), and psoriatic arthritis), asthma, atherosclerosis, Crohn's disease, colitis, dermatitis, diverticulitis, fibromyalgia, hepatitis, irritable bowel syndrome (IBS), psoriasis, Stevens-Johnson syndrome, systemic lupus erythematous (SLE), nephritis, and ulcerative colitis.
  • arthritis e.g., osteoarthritis, rheumatoid arthritis (RA), and psoriatic arthritis
  • asthma atherosclerosis
  • Crohn's disease colitis
  • dermatitis dermatitis
  • diverticulitis fibromyalgia
  • hepatitis irritable bowel syndrome
  • IBS irritable bowel
  • Still other inflammatory conditions include: immunoinflammatory disorders such as acne vulgaris; acute respiratory distress syndrome; Addison's disease; allergic rhinitis; allergic intraocular inflammatory diseases, ANCA-associated small-vessel vasculitis; ankylosing spondylitis; arthritis, asthma; atherosclerosis; atopic dermatitis; autoimmune hemolytic anemia; autoimmune hepatitis; Behcet's disease; Bell's palsy; bullous pemphigoid; cerebral ischaemia; chronic obstructive pulmonary disease; cirrhosis; Cogan's syndrome; contact dermatitis; COPD; Crohn's disease; Cushing's syndrome; dermatomyositis; diabetes mellitus; discoid lupus erythematosus; eosinophilic fasciitis; erythema nodosum; exfoliative dermatitis; fibromyalgia; focal glomerulosclerosis; giant cell arteritis;
  • the compounds and compositions described herein can also be used in the treatment or prevention of pain, including nociceptive pain, inflammatory pain, functional pain and neuropathic pain, all of which may be acute or chronic.
  • the subject e.g., a human
  • the subject may be diagnosed as having peripheral diabetic neuropathy, compression neuropathy, post herpetic neuralgia, trigeminal or glossopharyngeal neuralgia, post traumatic or post surgical nerve damage, lumbar or cervical radiculopathy, AIDS neuropathy, metabolic neuropathy, drug induced neuropathy, complex regional pain syndrome, arachnoiditis, spinal cord injury, bone or joint injury, tissue injury, psoriasis, scleroderma, pruritis, cancer (e.g., prostate, colon, breast, skin, hepatic, or kidney), cardiovascular disease (e.g., myocardial infarction, angina, ischemic or thrombotic cardiovascular disease, peripheral vascular occlusive disease, or peripheral arterial occlus
  • Additional conditions that can be treated using the compounds provided herein include those described in, e.g.: U.S. Pat. Nos. 6,756,394; 7,253,201; 7,491,743; 8,143,300; 8,278,344; and 8,324,262; U.S. Patent Application Publication Nos. 20100087453, 2012/0309795, and 20120122889; and International Publication Nos. WO 2011/133964 and WO/2012/061045; each of which is hereby incorporated by reference in its entirety.
  • treatment with the compounds and compositions described herein can be combined with therapies for the treatment of any of the conditions described herein.
  • Such treatments include surgery, radiotherapy, chemotherapy, or the administration of one or more additional compounds.
  • Exemplary compounds suitable for combination therapy with Nec compounds are described below.
  • apoptosis inhibitors i.e., compounds that inhibit apoptosis, including but not limited to reversible and irreversible caspase inhibitors.
  • An example of an apoptosis inhibitor includes zVAD, IETD, YVAD, DEVD, and LEHD.
  • the compounds of the invention are administered in combination with PARP poly(ADP-ribose) polymerase inhibitors.
  • PARP inhibitors include 6(5H)-phenanthridinone, 4-Amino-1,8-naphthalimide, 1,5-Isoquinolinediol, and 3-Aminobenzamide.
  • Src proteins are mammalian cytoplasmic tyrosine kinases that play an extensive role in signal transduction.
  • Src inhibitors include but are not limited to: PP1 (1-(1,1-dimethylethyl)-1-(4-methylphenyl)-1H-pyrazolo[3,4-d]pyrimidin-4-amine), PP2 (3-(4-chlorophenyl)-1-(1,1-dimethylethyl)-1H-pyrazolo[3,4-d]pyrimidin-4-amine), damnacanthal (3-hydroxy-1-methoxy-2-anthra-quinonecarboxaldehyde), and SU-5565.
  • the methods of the invention involve, in some aspects, combinations of compounds that are inhibitors of cellular necrosis (e.g., heterocyclic thiohydantoin, hydantoin, oxazolidinone, thioxo-oxazolidinone, pyrimidinone, or oxazinanone compounds, or combinations thereof) with agents for the treatment of cardiovascular disorders.
  • agents include anti-inflammatory agents, anti-thrombotic agents, anti-platelet agents, fibrinolytic agents, lipid reducing agents, direct thrombin inhibitors, glycoprotein IIb/IIIa receptor inhibitors, agents that bind to cellular adhesion molecules and inhibit the ability of white blood cells to attach to such molecules (e.g. anti-cellular adhesion molecule antibodies), calcium channel blockers, beta-adrenergic receptor blockers, cyclooxygenase-2 inhibitors, angiotensin system inhibitors, and any combinations thereof.
  • One preferred agent is aspirin.
  • Anti-inflammatory agents include alclofenac; alclometasone dipropionate; algestone acetonide; alpha amylase; amcinafal; amcinafide; amfenac sodium; amiprilose hydrochloride; anakinra; anirolac; anitrazafen; apazone; balsalazide disodium; bendazac; benoxaprofen; benzydamine hydrochloride; bromelains; broperamole; budesonide; carprofen; cicloprofen; cintazone; cliprofen; clobetasol propionate; clobetasone butyrate; clopirac; cloticasone propionate; cormethasone acetate; cortodoxone; deflazacort; desonide; desoximetasone; dexamethasone dipropionate; diclofenac potassium; diclofenac sodium; diflorasone diacetate
  • Anti-thrombotic and fibrinolytic agents include plasminogen (to plasmin via interactions of prekallikrein, kininogens, factors XII, XIIIa, plasminogen proactivator, and tissue plasminogen activator (TPA)) streptokinase; urokinase: anisoylated plasminogen-streptokinase activator complex; pro-urokinase (pro-UK); rTPA (alteplase or activase); rPro-UK; abbokinase; eminase; sreptase anagrelide hydrochloride; bivalirudin; dalteparin sodium; danaparoid sodium; dazoxiben hydrochloride; efegatran sulfate; enoxaparin sodium; ifetroban; ifetroban sodium; tinzaparin sodium; retaplase; trifenagrel; war
  • Anti-platelet agents include clopridogrel; sulfinpyrazone; aspirin; dipyridamole; clofibrate; pyridinol carbamate; PGE; glucagon; antiserotonin drugs; caffeine; theophyllin; pentoxifyllin; ticlopidine; and anagrelide.
  • Lipid reducing agents include gemfibrozil, cholystyramine, colestipol, nicotinic acid, probucol, lovastatin, fluvastatin, simvastatin, atorvastatin, pravastatin, and cirivastatin.
  • Direct thrombin inhibitors include hirudin, hirugen, hirulog, agatroban, PPACK, and thrombin aptamers.
  • Glycoprotein IIb/IIIa receptor inhibitors include both antibodies and non-antibodies, and include but are not limited to ReoPro (abcixamab), lamifiban, and tirofiban.
  • Calcium channel blockers are a chemically diverse class of compounds having important therapeutic value in the control of a variety of diseases including several cardiovascular disorders, such as hypertension, angina, and cardiac arrhythmias (Fleckenstein, Cir. Res. 52:13-16 (1983); Fleckenstein, Experimental Facts and Therapeutic Prospects, John Wiley, New York (1983); McCall, D., Curr. Pract. Cardiol. 10:1-11 (1985)).
  • Calcium channel blockers are a heterogenous group of drugs that prevent or slow the entry of calcium into cells by regulating cellular calcium channels. (Remington, The Science and Practice of Pharmacy, Nineteenth Edition, Mack Publishing Company, Eaton, Pa., p. 963 (1995)).
  • the dihydropyridines such as nifedipine
  • the phenyl alkyl amines such as verapamil
  • benzothiazepines such as diltiazem.
  • calcium channel blockers useful according to the invention include, but are not limited to, amrinone, amlodipine, bencyclane, felodipine, fendiline, flunarizine, isradipine, nicardipine, nimodipine, perhexylene, gallopamil, tiapamil and tiapamil analogues (such as 1993RO-11-2933), phenyloin, barbiturates, and the peptides dynorphin, omega-conotoxin, and omega-agatoxin, and pharmaceutically acceptable salts thereof.
  • Beta-adrenergic receptor blocking agents are a class of drugs that antagonize the cardiovascular effects of catecholamines in angina pectoris, hypertension, and cardiac arrhythmias.
  • Beta-adrenergic receptor blockers include, but are not limited to, atenolol, acebutolol, alprenolol, befunolol, betaxolol, bunitrolol, carteolol, celiprolol, hedroxalol, indenolol, labetalol, levobunolol, mepindolol, methypranol, metindol, metoprolol, metrizoranolol, oxprenolol, pindolol, propranolol, practolol, practolol, sotalolnadolol, tiprenolol, tomalolol, timolo
  • Cyclooxygenase-2 (COX-2) is an enzyme complex present in most tissues that produces various prostaglandins and thromboxanes from arachidonic acid.
  • COX-2 inhibitors include, but are not limited to, those described in U.S. Pat. Nos. 5,474,995, 5,521,213, 5,536,752, 5,550,142, 5,552,422, 5,604,253, 5,604,260, 5,639,780, 5,677,318, 5,691,374, 5,698,584, 5,710,140, 5,733,909, 5,789,413, 5,817,700, 5,849,943, 5,861,419, 5,922,742, 5,925,631, and 5,643,933.
  • a number of the above-identified COX-2 inhibitors are prodrugs of selective COX-2 inhibitors and exert their action by conversion in vivo to the active and selective COX-2 inhibitors.
  • the active and selective COX-2 inhibitors formed from the above-identified COX-2 inhibitor prodrugs are described in detail in PCT/WO95/00501, PCT/WO95/18799, and U.S. Pat. No. 5,474,995. Given the teachings of U.S. Pat. No. 5,543,297, a person of ordinary skill in the art would be able to determine whether an agent is a selective COX-2 inhibitor or a precursor of a COX-2 inhibitor.
  • Angiotensin system inhibitors are capable of interfering with the function, synthesis or catabolism of angiotensin II. These agents include, but are not limited to, angiotensin-converting enzyme (ACE) inhibitors, angiotensin II antagonists, angiotensin II receptor antagonists, agents that activate the catabolism of angiotensin II, and agents that prevent the synthesis of angiotensin I from which angiotensin II is ultimately derived.
  • ACE angiotensin-converting enzyme
  • the renin-angiotensin system is involved in the regulation of hemodynamics and water and electrolyte balance. Factors that lower blood volume, renal perfusion pressure, or the concentration of Na + in plasma tend to activate the system, while factors that increase these parameters tend to suppress its function.
  • Angiotensin I and angiotensin II are synthesized by the enzymatic renin-angiotensin pathway. The synthetic process is initiated when the enzyme renin acts on angiotensinogen, pseudoglobulin in blood plasma, to produce the decapeptide angiotensin I.
  • Angiotensin I is converted by angiotensin converting enzyme (ACE) to angiotensin II (angiotensin-[1-8] octapeptide).
  • ACE angiotensin converting enzyme
  • angiotensin II angiotensin-[1-8] octapeptide
  • Angiotensin (renin-angiotensin) system inhibitors are compounds that act to interfere with the production of angiotensin II from angiotensinogen or angiotensin I or interfere with the activity of angiotensin II.
  • Such inhibitors are well known to those of ordinary skill in the art and include compounds that act to inhibit the enzymes involved in the ultimate production of angiotensin II, including renin and ACE. They also include compounds that interfere with the activity of angiotensin II, once produced.
  • classes of such compounds include antibodies (e.g., to renin), amino acids and analogs thereof (including those conjugated to larger molecules), peptides (including peptide analogs of angiotensin and angiotensin I), pro-renin related analogs, etc.
  • renin inhibitors renin inhibitors
  • ACE inhibitors renin inhibitors
  • angiotensin II antagonists renin-angiotensin II antagonists.
  • the renin-angiotensin system inhibitors are renin inhibitors, ACE inhibitors, and angiotensin II antagonists.
  • Angiotensin II antagonists are compounds which interfere with the activity of angiotensin II by binding to angiotensin II receptors and interfering with its activity.
  • Angiotensin II antagonists are well known and include peptide compounds and non-peptide compounds.
  • Most angiotensin II antagonists are slightly modified congeners in which agonist activity is attenuated by replacement of phenylalanine in position 8 with some other amino acid; stability can be enhanced by other replacements that slow degeneration in vivo.
  • angiotensin II antagonists include: peptidic compounds (e.g., saralasin, [(San 1 )(Val 5 )(Ala 8 )] angiotensin-(1-8) octapeptide and related analogs); N-substituted imidazole-2-one (U.S. Pat. No. 5,087,634); imidazole acetate derivatives including 2-N-butyl-4-chloro-1-(2-chlorobenzile) imidazole-5-acetic acid (see Long et al., J. Pharmacol. Exp. Ther.
  • peptidic compounds e.g., saralasin, [(San 1 )(Val 5 )(Ala 8 )] angiotensin-(1-8) octapeptide and related analogs
  • N-substituted imidazole-2-one U.S. Pat. No. 5,087,634
  • ES8891 N-morpholinoacetyl-(-1-naphthyl)-L-alanyl-(4, thiazolyl)-L-alanyl (35, 45)-4-amino-3-hydroxy-5-cyclo-hexapentanoyl-N-hexylamide, Sankyo Company, Ltd., Tokyo, Japan
  • SKF 108566 E-alpha-2-[2-butyl-1-(carboxy phenyl)methyl]1H-imidazole-5-yl[methylane]-2-thiophenepropanoic acid, Smith Kline Beecham Pharmaceuticals, PA); Losartan (DUP753/MK954, DuPont Merck Pharmaceutical Company); Remikirin (RO42-5892, F. Hoffman LaRoche AG); A 2 agonists (Marion Merrill Dow) and certain non-peptide heterocycles (G.D. Searle and Company).
  • Angiotensin converting enzyme is an enzyme which catalyzes the conversion of angiotensin I to angiotensin II.
  • ACE inhibitors include amino acids and derivatives thereof, peptides, including di and tri peptides and antibodies to ACE which intervene in the renin-angiotensin system by inhibiting the activity of ACE thereby reducing or eliminating the formation of pressor substance angiotensin II.
  • ACE inhibitors have been used medically to treat hypertension, congestive heart failure, myocardial infarction and renal disease.
  • Classes of compounds known to be useful as ACE inhibitors include acylmercapto and mercaptoalkanoyl prolines such as captopril (U.S. Pat. No.
  • Renin inhibitors are compounds which interfere with the activity of renin. Renin inhibitors include amino acids and derivatives thereof, peptides and derivatives thereof, and antibodies to renin. Examples of renin inhibitors that are the subject of United States patents are as follows: urea derivatives of peptides (U.S. Pat. No. 5,116,835); amino acids connected by nonpeptide bonds (U.S. Pat. No. 5,114,937); di and tri peptide derivatives (U.S. Pat. No. 5,106,835); amino acids and derivatives thereof (U.S. Pat. Nos. 5,104,869 and 5,095,119); diol sulfonamides and sulfinyls (U.S. Pat. No.
  • polypeptide agents that bind to cellular adhesion molecules and inhibit the ability of white blood cells to attach to such molecules include polypeptide agents.
  • polypeptide agents include polyclonal and monoclonal antibodies, prepared according to conventional methodology. Such antibodies already are known in the art and include anti-ICAM 1 antibodies as well as other such antibodies.
  • anti-ICAM 1 antibodies as well as other such antibodies.
  • the paratrope only a small portion of an antibody molecule, the paratrope, is involved in the binding of the antibody to its epitope (see, in general, Clark, W. R. (1986) The Experimental Foundations of Modern Immunology, Wiley & Sons, Inc., New York; Roitt, I. (1991) Essential Immunology, 7th Ed., Blackwell Scientific Publications, Oxford).
  • the pFc′ and Fc regions are effectors of the complement cascade but are not involved in antigen binding.
  • an antibody from which the Fc region has been enzymatically cleaved, or which has been produced without the Fc region designated an antibody from which the Fc region has been enzymatically cleaved, or which has been produced without the Fc region, designated an Fab fragment, retains one of the antigen binding sites of an intact antibody molecule.
  • Fab fragments consist of a covalently bound antibody light chain and a portion of the antibody heavy chain denoted Fd.
  • the Fd fragments are the major determinant of antibody specificity (a single Fd Fragment may be associated with up to ten different light chains without altering antibody specificity
  • CDRs complementarity determining regions
  • Frs framework regions
  • FR1 through FR4 framework regions
  • CDR1 through CDR3 complementarity determining regions
  • non-CDR regions of a mammalian antibody may be replaced with similar regions of conspecific or heterospecific antibodies while retaining the epitopic specificity of the original antibody.
  • This is most clearly manifested in the development and use of “humanized” antibodies in which non-human CDRs are covalently joined to human FR and/or Fc/pFc′ regions to produce a functional antibody.
  • PCT International Publication Number WO 92/04381 teaches the production and use of humanized murine RSV antibodies in which at least a portion of the murine FR regions have been replaced by FR regions of human origin.
  • Such antibodies, including fragments of intact antibodies with antigen-binding ability, are often referred to as “chimeric” antibodies.
  • the present invention also provides for F(ab′) 2 , Fab, Fv and Fd fragments; chimeric antibodies in which the Fc and/or Fr and/or CDR1 and/or CDR2 and/or light chain CDR3 regions have been replaced by homologous human or non-human sequences; chimeric F(ab′) 2 fragment antibodies in which the FR and/or CDR1 and/or CDR2 and/or light chain CDR3 regions have been replaced by homologous human or non-human sequences; chimeric Fab fragment antibodies in which the FR and/or CDR1 and/or CDR2 and/or light chain CDR3 regions have been replaced by homologous human or non-human sequences; and chimeric Fd fragment antibodies in which the FR and/or CDR1 and/or CDR2 regions have been replaced by homologous human or nonhuman sequences.
  • the present invention also includes so-called single chain antibodies.
  • polypeptides of numerous size and type that bind specifically to cellular adhesion molecules may be derived also from sources other than antibody technology.
  • polypeptide binding agents can be provided by degenerate peptide libraries which can be readily prepared in solution, in immobilized form or as phage display libraries.
  • Combinatorial libraries also can be synthesized of peptides containing one or more amino acids. Libraries further can be synthesized of peptoids and non-peptide synthetic moieties.
  • Phage display can be particularly effective in identifying binding peptides useful according to the invention. Briefly, one prepares a phage library (using, e.g., m13, fd, or lambda phage), displaying inserts from 4 to about 80 amino acid residues using conventional procedures.
  • the inserts may represent, for example, a completely degenerate or biased array.
  • the minimal linear portion of the sequence that binds to the cellular adhesion molecule can be determined.
  • Yeast two-hybrid screening methods also may be used to identify polypeptides that bind to the cellular adhesion molecules.
  • cellular adhesion molecules, or a fragment thereof can be used to screen peptide libraries, including phage display libraries, to identify and select peptide binding partners of the cellular adhesion molecules.
  • any of the compounds described herein e.g., a compound according to any of formulas (I)-(XXXII) or any of compounds (1)-(41)
  • pharmaceutical compositions of the invention can be used together with a set of instructions, i.e., to form a kit.
  • the kit may include instructions for use of the compounds of the invention in a screening method or as a therapy as described herein.
  • standard cross-coupling techniques can be used to assemble the heteroaryl-aryl intermediate D.
  • a suitable electrophilic compound such as heteroaryl bromide A can be transformed to the corresponding alkyne B1 under, e.g., Sonogashira coupling conditions with alkynes such as TMS-C ⁇ CH.
  • Intermediate B1 can then be treated with an electrophilic compound such as phenyliodide C in order to afford the disubstituted alkyne product D.
  • the methyl ester moiety of compound D can provide a useful handle for further modification of the compounds, such as the installation of an amide moiety as shown in compound E, where the tosyloxy group can be nucleophilically displaced by a fragment A 1 precursor such as compound F. In this manner, compounds such as Compound (3) can be prepared.
  • Still other compounds of the invention that include, e.g., various L 2 linker groups can be prepared by variation of the amine starting material used in the amide synthesis step, as shown in Scheme 5.
  • the pyrrole carboxylic ester starting material can be formylated to afford intermediate I1, and the formyl group can be transformed to a nitrile under standard conditions to afford product J1. Hydrolysis and N-alkylation can then yield compound K1. Treatment under amide forming conditions with benzylamine L1 can that afford the desired substructure A1 precursor M1, which can be deprotected and coupled with intermediates such as Compound D.
  • Scheme 7 provides still more methods by which to prepare compounds of the invention by treating carboxylic intermediates such as compound K1 with different benzylamine reagents such as compounds L2 and L3 in order to afford, respectively, intermediates M2 and M3.
  • Still further analogues can be prepared as shown in Scheme 10.
  • Heteroaryl halides such as compound A can be transformed to homopropargyl halides such as compound B, which, in turn, can be used as an alkylating agent when combined with compound F in order to afford compound (21).
  • necroptosis inhibitory activity can be performed using a FADD-deficient variant of human Jurkat T cells treated with TNF- ⁇ as previously described (Degterev et al., Nat. Chem. Biol. 1:112 (2005) and Jagtap et al., J. Med. Chem. 50: 1886 (2007)).
  • cells can be treated with 10 ng/mL of human TNF- ⁇ in the presence of increasing concentration of test compounds for 24 hours followed by ATP-based viability assessment.
  • necroptosis activity can be performed using a FADD-deficient variant of human Jurkat T cells treated with TNF- ⁇ .
  • cells 500,000 cells/mL, 100 ⁇ L per well in a 96-well plate
  • 10 ng/mL of human TNF- ⁇ in the presence of increasing concentration of test compounds for 24 hours at 37° C. in a humidified incubator with 5% CO 2 followed by ATP-based viability assessment.
  • Stock solutions (30 mM) in DMSO can be prepared and then diluted with DMSO to give testing solutions, which were added to each test well. The final DMSO concentration can be 0.5%.
  • Eleven compound test concentrations (0.030-100 ⁇ M) can be used, and each concentration can be done in duplicate.
  • Cell viability assessments can be performed using a commercial luminescent ATP-based assay kit (CellTiter-Glo, Promega, Madison, Wis.) according to the manufacturer's instructions. Briefly, 40 ⁇ L of the cell lysis/ATP detection reagent can be added to each well. Plates can be incubated on a rocking platform for 10 minutes at room temperature and luminescence was measured using a Wallac Victor 3 plate-reader (Perkin Elmer, Wellesley, Mass.). Cell viability can be expressed as a ratio of the signal in the well treated with TNF- ⁇ and compound to the signal in the well treated with compound alone in order to account for nonspecific toxicity. EC 50 values can be calculated using nonlinear regression analysis of sigmoid dose-response (variable slope) curves from plots of log [I] verses viability values.
  • Table 3 shows the results of necroptosis assay of the compounds of the invention.
  • FADD-deficient Jurkat cells were treated with 10 ng/ml human TNFalpha for 24 hr, followed by CellTiter-Glo viability assay (Promega). EC50 values were calculated using non-linear regression in GraphPad Prism software. Eleven concentrations of each compound were tested to generate dose response curves.
  • Microsome stability can be determined in pooled mouse liver microsomes.
  • a test compound (3 ⁇ M final concentration) along with 0.5 mg/mL microsome protein and 1 mM NADPH can be incubated for 0, 5, 15, 30 and 60 minutes. Incubation of test compound and microsomes in the absence of NADPH can serve as a negative control.
  • the C ⁇ RMSD and the backbone RMSD deviations for the model and the template crystal structure were ⁇ 1.0 ⁇ and ⁇ 1.2 ⁇ respectively.
  • the best model was subjected to geometric evaluations using PROCHECK (Laskowski et al., J Biomol NMR 1996, 8(4):477-486) with an overall G-value of ⁇ 0.05. Ramachandran plots indicated that >93% of the residues are in the allowed region of the map (Laskowski et al., J Biomol NMR 1996, 8(4):477-486; and Potteron et al., Acta Crystallogr D Biol Crystallogr 2003, 59 (Pt 7):1131-1137).
  • Glide 4.5 (Sherman et al., J Med Chem 2006, 49(2):534-553; Friesner et al., J Med Chem 2004, 47(7):1739-1749; and Halgren et al., J Med Chem 2004, 47(7):1750-1759) was used for all docking calculations of both DLG-in and DLG-out structures of RIP1. Induced fit docking protocol with a softened-potential docking was performed to generate 20 initial poses. The softened-potential docking consisted of scaling the van der Waals radii by 0.5 except in the event when alanine substitutions were introduced, in which case the receptor scaling was set to 0.7.
  • the Glide hydrogen bond energy cutoff filter was decreased to ⁇ 0.05 kcal/mol. This ensures that all retained poses contain at the very least a weak hydrogen bond with the receptor with backbone amide of Met 74.
  • the Glide Coulomb-vdW energy cutoff filter was increased to 10 kcal/mol, enabling toleration of more steric clashes than in a normal docking run. Poses with an RMSD of less than 0.5 ⁇ and a maximum atomic displacement of less than 1.2 ⁇ were eliminated as redundant in order to increase diversity in the retained ligand poses. An inner grid box of 10 ⁇ was used to fit the ligand center and an outer box size of 20 ⁇ was used.
  • Prime uses the OPLS-AA parameter and a surface Generalized Born implicit solvent model.
  • a list was generated consisting of all residues having at least one atom within 5 ⁇ of an atom in any of the 20 ligand poses. All side chains in the list underwent a conformational search and minimization. Three residues that were mutated to alanine in the initial docking stage were returned to their original identity prior to the search. After convergence to a low-energy solution, an additional minimization was performed allowing all residues in the list (backbone and side chain) and the ligand to be relaxed. The complexes were ranked by Prime energy (molecular mechanics plus solvation) and those within 30 kcal/mol of the minimum energy structure were passed through for a final round of Glide docking and scoring.
  • the minimized ligand used in the first docking step is redocked using Glide with default settings into each of the 10 receptor structures produced in protein refinement step.
  • a composite score that accounts for the protein/ligand interaction energy (GlideScore) (Friesner et al., J Med Chem 2004, 47(7):1739-1749; and Halgren et al., J Med Chem 2004, 47(7):1750-1759)), and the total energy of the system (Prime energy) is calculated using the following equation: (GlideScore)+(0.05 ⁇ PrimeEnergy).

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