US20180215731A1 - Cereblon ligands and bifunctional compounds comprising the same - Google Patents

Cereblon ligands and bifunctional compounds comprising the same Download PDF

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US20180215731A1
US20180215731A1 US15/885,671 US201815885671A US2018215731A1 US 20180215731 A1 US20180215731 A1 US 20180215731A1 US 201815885671 A US201815885671 A US 201815885671A US 2018215731 A1 US2018215731 A1 US 2018215731A1
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Andrew P. Crew
Michael Berlin
Hanqing Dong
Keith R. Homberger
Yimin Qian
Lawrence B. Snyder
Jing Wang
Kurt Zimmermann
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Arvinas Operations Inc
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Priority to US18/079,790 priority patent/US12441708B2/en
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    • C07D401/14—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing three or more hetero rings
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    • C07D401/04—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings directly linked by a ring-member-to-ring-member bond
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    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
    • A61K31/44—Non condensed pyridines; Hydrogenated derivatives thereof
    • A61K31/445—Non condensed piperidines, e.g. piperocaine
    • A61K31/4523—Non condensed piperidines, e.g. piperocaine containing further heterocyclic ring systems
    • A61K31/454—Non condensed piperidines, e.g. piperocaine containing further heterocyclic ring systems containing a five-membered ring with nitrogen as a ring hetero atom, e.g. pimozide, domperidone
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    • A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
    • A61K31/47—Quinolines; Isoquinolines
    • A61K31/472—Non-condensed isoquinolines, e.g. papaverine
    • A61K31/4725—Non-condensed isoquinolines, e.g. papaverine containing further heterocyclic rings
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    • A61K47/54—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an organic compound
    • A61K47/55—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an organic compound the modifying agent being also a pharmacologically or therapeutically active agent, i.e. the entire conjugate being a codrug
    • A—HUMAN NECESSITIES
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    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
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    • C07D417/14—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing three or more hetero rings
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    • C07D471/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
    • C07D471/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains two hetero rings
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    • C07D471/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains two hetero rings
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    • 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

  • the description provides imide-based compounds, including bifunctional compounds comprising the same, and associated methods of use.
  • the bifunctional compounds are useful as modulators of targeted ubiquitination, especially with respect to a variety of polypeptides and other proteins, which are degraded and/or otherwise inhibited by bifunctional compounds according to the present disclosure.
  • E3 ubiquitin ligases (of which hundreds are known in humans) confer substrate specificity for ubiquitination, and therefore, are more attractive therapeutic targets than general proteasome inhibitors due to their specificity for certain protein substrates.
  • the development of ligands of E3 ligases has proven challenging, in part due to the fact that they must disrupt protein-protein interactions.
  • recent developments have provided specific ligands which bind to these ligases. For example, since the discovery of nutlins, the first small molecule E3 ligase inhibitors, additional compounds have been reported that target E3 ligases but the field remains underdeveloped.
  • VHL von Hippel-Lindau
  • VHL comprises the substrate recognition subunit/E3 ligase complex VCB, which includes elongins B and C, and a complex including Cullin-2 and Rbx1.
  • the primary substrate of VHL is Hypoxia Inducible Factor 1 ⁇ (HIF-1 ⁇ ), a transcription factor that upregulates genes such as the pro-angiogenic growth factor VEGF and the red blood cell inducing cytokine erythropoietin in response to low oxygen levels.
  • HIF-1 ⁇ Hypoxia Inducible Factor 1 ⁇
  • VHL Von Hippel Lindau
  • Cereblon is a protein that in humans is encoded by the CRBN gene. CRBN orthologs are highly conserved from plants to humans, which underscores its physiological importance. Cereblon forms an E3 ubiquitin ligase complex with damaged DNA binding protein 1 (DDB1), Cullin-4A (CUL4A), and regulator of cullins 1 (ROC1). This complex ubiquitinates a number of other proteins. Through a mechanism which has not been completely elucidated, cereblon ubquitination of target proteins results in increased levels of fibroblast growth factor 8 (FGF8) and fibroblast growth factor 10 (FGF10). FGF8 in turn regulates a number of developmental processes, such as limb and auditory vesicle formation. The net result is that this ubiquitin ligase complex is important for limb outgrowth in embryos. In the absence of cereblon, DDB1 forms a complex with DDB2 that functions as a DNA damage-binding protein.
  • DDB1 forms a complex
  • Thalidomide which has been approved for the treatment of a number of immunological indications, has also been approved for the treatment of certain neoplastic diseases, including multiple myeloma.
  • thalidomide and several of its analogs are also currently under investigation for use in treating a variety of other types of cancer. While the precise mechanism of thalidomide's anti-tumor activity is still emerging, it is known to inhibit angiogenesis.
  • Recent literature discussing the biology of the imides includes Lu et al Science 343, 305 (2014) and Krönke et al Science 343, 301 (2014).
  • thalidomide and its analogs e.g. pomolinamiode and lenalinomide
  • these agents bind to cereblon, altering the specificity of the complex to induce the ubiquitination and degradation of Ikaros (IKZF1) and Aiolos (IKZF3), transcription factors essential for multiple myeloma growth.
  • IKZF1 and Aiolos IKZF3
  • IKZF3 Aiolos
  • BRD4 has captured considerable attention from academia and Pharmaceutical industry alike due to its great potential as a novel target in multiple disease settings, particularly in cancer.
  • BRD4 belongs to the bromodomain and extra-terminal domain (BET) family, which is characterized by two bromodomains (BD domain) at the N-terminus and an extraterminal domain (ET domain) at the C-terminus (J. Shi, et al. Molecular cell, 54 (2014) 728-736 and A. C. Belkina, et al., Nat. Rev. Cancer, 12 (2012) 465-477).
  • BET bromodomain and extra-terminal domain
  • BRD4 plays a key role in regulating gene expression by recruiting relevant transcription modulators to specific genomic loci.
  • BRD4 is preferentially located at super-enhancer regions, which often reside upstream of important oncogenes, such as c-MYC, Bcl-xL and BCL-6, and play a key role in regulating their expressions (J. Loven, et al., Cell, 153 (2013) 320-334 and B.
  • BRD4 Owing to its pivotal role in modulating the expression of essential oncogenes, BRD4 emerges as a promising therapeutic target in multiple cancer types, including midline carcinoma, AML, MM, BL, and prostate cancer (J. Loven, et al., Cell, 153 (2013) 320-334; J. Zuber, et al., Nature, 478 (2011) 524-528; J. E. Delmore, et al., Cell, 146 (2011) 904-917; J. A. Mertz, et al., PNAS, 108 (2011) 16669-16674; A. Wyce, et al., Oncotarget, 4 (2013) 2419-2429; I. A.
  • BRD4 may serve as an alternative strategy of targeting c-MYC, which contributes to the development and maintenance of a majority of human cancers but has remained undruggable (J. E. Delmore, et al., Cell, 146 (2011) 904-917; J. A. Mertz, et al., PNAS, 108 (2011) 16669-16674; M. G. Baratta, et al., PNAS, 112 (2015) 232-237; and M. Gabay, et al., Cold Spring Harb Perspect Med . (2014) 4:a014241).
  • BRD4 inhibitors such as JQ1, iBET and OTX15
  • JQ1, iBET and OTX15 small molecule BRD4 inhibitors
  • JQ1, iBET and OTX15 small molecule BRD4 inhibitors
  • JQ1, iBET and OTX15 have demonstrated promising therapeutic potential in preclinical models of various cancers, including BL (J. Loven, et al., Cell, 153 (2013) 320-334; B. Chapuy, et al., Cancer Cell, 24 (2013) 777-790; J. E. Delmore, et al., Cell, 146 (2011) 904-917; J. A. Mertz, et al., PNAS, 108 (2011) 16669-16674; I. A. Asangani, et al., Nature, 510 (2014) 278-282; M. G. Baratta, et al., PNAS, 112 (2015) 232-237; M.
  • BRD4 inhibitors have shown various anti-tumor activities with good tolerability in different mouse tumor models and, not surprisingly, high sensitivity to BRD4 inhibitors such as JQ1, has been associated with high level of either c-MYC and N-MYC in different tumor types, including c-MYC driven BL. Almost all BL cases contain c-myc gene translocation that places it under control of a super-enhancer located upstream of IgH, thus driving an abnormally high level of c-MYC expression, tumor development and maintenance (K. Klapproth, et al., British journal of haematology, 149 (2010) 484-497).
  • the present disclosure describes bifunctional compounds which function to recruit endogenous proteins to an E3 Ubiquitin Ligase for degradation, and methods of using the same.
  • the present disclosure provides bifunctional or proteolysis targeting chimeric (PROTAC) compounds, which find utility as modulators of targeted ubiquitination of a variety of polypeptides and other proteins, which are then degraded and/or otherwise inhibited by the bifunctional compounds as described herein.
  • An advantage of the compounds provided herein is that a broad range of pharmacological activities is possible, consistent with the degradation/inhibition of targeted polypeptides from virtually any protein class or family.
  • the description provides methods of using an effective amount of the compounds as described herein for the treatment or amelioration of a disease condition, such as cancer, e.g., multiple myeloma.
  • the disclosure provides novel imide-based compounds as described herein.
  • the disclosure provides bifunctional or PROTAC compounds, which comprise an E3 Ubiquitin Ligase binding moiety (i.e., a ligand for an E3 Ubiquitin Ligase or “ULM” group), and a moiety that binds a target protein (i.e., a protein/polypeptide targeting ligand or “PTM” group) such that the target protein/polypeptide is placed in proximity to the ubiquitin ligase to effect degradation (and inhibition) of that protein.
  • the ULM is a cereblon E3 Ubiquitin Ligase binding moiety (i.e., a “CLM”).
  • the structure of the bifunctional compound can be depicted as:
  • the bifunctional compound further comprises a chemical linker (“L”).
  • L a chemical linker
  • PTM is a protein/polypeptide targeting moiety
  • L is a linker
  • CLM is a cereblon E3 ubiquitin ligase binding moiety.
  • the E3 Ubiquitin Ligase is cereblon.
  • the CLM of the bifunctional compound comprises chemistries such as imide, amide, thioamide, thioimide derived moieties.
  • the CLM comprises a phthalimido group or an analog or derivative thereof.
  • the CLM comprises a phthalimido-glutarimide group or an analog or derivative thereof.
  • the CLM comprises a member of the group consisting of thalidomide, lenalidomide, pomalidomide, and analogs or derivatives thereof.
  • the compounds as described herein comprise multiple CLMs, multiple PTMs, multiple chemical linkers or a combination thereof.
  • the ULM ubiquitination ligase modulator
  • VHL Von Hippel-Lindau E3 ubiquitin ligase binding moiety
  • CLM cereblon E3 ubiquitin ligase binding moiety
  • MDM2 mouse double minute 2 homolog
  • E3 ubiquitin ligase binding moiety MLM
  • IAP IAP E3 ubiquitin ligase binding moiety
  • the bifunctional compound includes at least one additional E3 ligase binding moiety selected from the group consisting of VLM, VLM′, CLM, CLM′, MLM, MLM′, ILM, ILM′, or a combination thereof.
  • additional E3 ligase binding moieties there can be at least 1, 2, 3, 4, or 5 additional E3 ligase binding moieties.
  • the description provides therapeutic compositions comprising an effective amount of a compound as described herein or salt form thereof, and a pharmaceutically acceptable carrier.
  • the therapeutic compositions modulate protein degradation in a patient or subject, for example, an animal such as a human, and can be used for treating or ameliorating disease states or conditions which are modulated through the degraded protein.
  • the therapeutic compositions as described herein may be used to effectuate the degradation of proteins of interest for the treatment or amelioration of a disease, e.g., cancer.
  • the present disclosure provides a method of ubiquitinating/degrading a target protein in a cell.
  • the method comprises administering a bifunctional compound as described herein comprising an CLM and a PTM, preferably linked through a linker moiety, as otherwise described herein, wherein the CLM is coupled to the PTM and wherein the CLM recognizes a ubiquitin pathway protein (e.g., an ubiquitin ligase, preferably an E3 ubiquitin ligase such as, e.g., cereblon) and the PTM recognizes the target protein such that degradation of the target protein will occur when the target protein is placed in proximity to the ubiquitin ligase, thus resulting in degradation/inhibition of the effects of the target protein and the control of protein levels.
  • a ubiquitin pathway protein e.g., an ubiquitin ligase, preferably an E3 ubiquitin ligase such as, e.g., cereblon
  • the PTM recognizes the target protein such that degradation of the target protein will occur when the target protein is placed in proximity to the ubiquit
  • the description provides a method for assessing (i.e., determining and/or measuring) a CLM's binding affinity.
  • the method comprises providing a test agent or compound of interest, for example, an agent or compound having an imide moiety, e.g., a phthalimido group, phthalimido-glutarimide group, derivatized thalidomide, derivatized lenalidomide or derivatized pomalidomide, and comparing the cereblon binding affinity and/or inhibitory activity of the test agent or compound as compared to an agent or compound known to bind and/or inhibit the activity of cereblon.
  • an agent or compound having an imide moiety e.g., a phthalimido group, phthalimido-glutarimide group, derivatized thalidomide, derivatized lenalidomide or derivatized pomalidomide
  • the description provides methods for treating or emeliorating a disease, disorder or symptom thereof in a subject or a patient, e.g., an animal such as a human, comprising administering to a subject in need thereof a composition comprising an effective amount, e.g., a therapeutically effective amount, of a compound as described herein or salt form thereof, and a pharmaceutically acceptable carrier, wherein the composition is effective for treating or ameliorating the disease or disorder or symptom thereof in the subject.
  • a composition comprising an effective amount, e.g., a therapeutically effective amount, of a compound as described herein or salt form thereof, and a pharmaceutically acceptable carrier, wherein the composition is effective for treating or ameliorating the disease or disorder or symptom thereof in the subject.
  • the description provides methods for identifying the effects of the degradation of proteins of interest in a biological system using compounds according to the present disclosure.
  • FIGS. 1A and 1B Illustration of general principle for PROTAC function.
  • Exemplary PROTACs comprise a protein targeting moiety (PTM; darkly shaded rectangle), a ubiquitin ligase binding moiety (ULM; lightly shaded triangle), and optionally a linker moiety (L; black line) coupling or tethering the PTM to the ULM.
  • PTM protein targeting moiety
  • ULM ubiquitin ligase binding moiety
  • L linker moiety
  • the E3 Ubiquitin Ligase is complexed with an E2 ubiquitin-conjugating protein, and either alone or via the E2 protein catalyzes attachment of ubiquitin (dark circles) to a lysine on the target protein via an isopeptide bond.
  • the poly-ubiquitinated protein (far right) is then targeted for degration by the proteosomal machinery of the cell.
  • compositions and methods that relate to the surprising and unexpected discovery that an E3 Ubiquitin Ligase protein, e.g., cereblon, ubiquitinates a target protein once it and the target protein are placed in proximity by a bifunctional or chimeric construct that binds the E3 Ubiquitin Ligase protein and the target protein.
  • the present disclosure provides such compounds and compositions comprising an E3 Ubiquintin Ligase binding moiety (“ULM”) coupled to a protein target binding moiety (“PTM”), which result in the ubiquitination of a chosen target protein, which leads to degradation of the target protein by the proteasome (see FIGS. 1A and 1B ).
  • the present disclosure also provides a library of compositions and the use thereof.
  • the present disclosure provides compounds which comprise a ligand, e.g., a small molecule ligand (i.e., having a molecular weight of below 2,000, 1,000, 500, or 200 Daltons), which is capable of binding to a ubiquitin ligase, such as IAP, VHL, MDM2, or cereblon.
  • a ligand e.g., a small molecule ligand (i.e., having a molecular weight of below 2,000, 1,000, 500, or 200 Daltons)
  • a ubiquitin ligase such as IAP, VHL, MDM2, or cereblon.
  • the compounds also comprise a moiety that is capable of binding to target protein, in such a way that the target protein is placed in proximity to the ubiquitin ligase to effect degradation (and/or inhibition) of that protein.
  • Small molecule can mean, in addition to the above, that the molecule is non-peptidyl, that is, it is not generally considered a peptide, e.g., comprises fewer than 4, 3, or 2 amino acids.
  • the PTM, ULM or PROTAC molecule can be a small molecule.
  • a reference to “A and/or B”, when used in conjunction with open-ended language such as “comprising” can refer, in one embodiment, to A only (optionally including elements other than B); in another embodiment, to B only (optionally including elements other than A); in yet another embodiment, to both A and B (optionally including other elements); etc.
  • the phrase “at least one,” in reference to a list of one or more elements, should be understood to mean at least one element selected from anyone or more of the elements in the list of elements, but not necessarily including at least one of each and every element specifically listed within the list of elements and not excluding any combinations of elements in the list of elements.
  • This definition also allows that elements may optionally be present other than the elements specifically identified within the list of elements to which the phrase “at least one” refers, whether related or unrelated to those elements specifically identified.
  • “at least one of A and B” can refer, in one embodiment, to at least one, optionally including more than one, A, with no B present (and optionally including elements other than B); in another embodiment, to at least one, optionally including more than one, B, with no A present (and optionally including elements other than A); in yet another embodiment, to at least one, optionally including more than one, A, and at least one, optionally including more than one, B (and optionally including other elements); etc.
  • co-administration and “co-administering” or “combination therapy” refer to both concurrent administration (administration of two or more therapeutic agents at the same time) and time varied administration (administration of one or more therapeutic agents at a time different from that of the administration of an additional therapeutic agent or agents), as long as the therapeutic agents are present in the patient to some extent, preferably at effective amounts, at the same time.
  • one or more of the present compounds described herein are coadministered in combination with at least one additional bioactive agent, especially including an anticancer agent.
  • the co-administration of compounds results in synergistic activity and/or therapy, including anticancer activity.
  • compound refers to any specific chemical compound disclosed herein and includes tautomers, regioisomers, geometric isomers, and where applicable, stereoisomers, including optical isomers (enantiomers) and other stereoisomers (diastereomers) thereof, as well as pharmaceutically acceptable salts and derivatives, including prodrug and/or deuterated forms thereof where applicable, in context.
  • Deuterated small molecules contemplated are those in which one or more of the hydrogen atoms contained in the drug molecule have been replaced by deuterium.
  • the term compound generally refers to a single compound, but also may include other compounds such as stereoisomers, regioisomers and/or optical isomers (including racemic mixtures) as well as specific enantiomers or enantiomerically enriched mixtures of disclosed compounds.
  • the term also refers, in context to prodrug forms of compounds which have been modified to facilitate the administration and delivery of compounds to a site of activity. It is noted that in describing the present compounds, numerous substituents and variables associated with same, among others, are described. It is understood by those of ordinary skill that molecules which are described herein are stable compounds as generally described hereunder. When the bond is shown, both a double bond and single bond are represented or understood within the context of the compound shown and well-known rules for valence interactions.
  • Ubiquitin Ligase refers to a family of proteins that facilitate the transfer of ubiquitin to a specific substrate protein, targeting the substrate protein for degradation.
  • cereblon is an E3 Ubiquitin Ligase protein that alone or in combination with an E2 ubiquitin-conjugating enzyme causes the attachment of ubiquitin to a lysine on a target protein, and subsequently targets the specific protein substrates for degradation by the proteasome.
  • E3 ubiquitin ligase alone or in complex with an E2 ubiquitin conjugating enzyme is responsible for the transfer of ubiquitin to targeted proteins.
  • the ubiquitin ligase is involved in polyubiquitination such that a second ubiquitin is attached to the first; a third is attached to the second, and so forth.
  • Polyubiquitination marks proteins for degradation by the proteasome.
  • Mono-ubiquitinated proteins are not targeted to the proteasome for degradation, but may instead be altered in their cellular location or function, for example, via binding other proteins that have domains capable of binding ubiquitin.
  • different lysines on ubiquitin can be targeted by an E3 to make chains. The most common lysine is Lys48 on the ubiquitin chain. This is the lysine used to make polyubiquitin, which is recognized by the proteasome.
  • patient or “subject” is used throughout the specification to describe an animal, preferably a human or a domesticated animal, to whom treatment, including prophylactic treatment, with the compositions according to the present disclosure is provided.
  • patient refers to that specific animal, including a domesticated animal such as a dog or cat or a farm animal such as a horse, cow, sheep, etc.
  • patient refers to a human patient unless otherwise stated or implied from the context of the use of the term.
  • the description provides compounds comprising an E3 Ubiquitin Ligase binding moiety (“ULM”) that is a cereblon E3 Ubiquitin Ligase binding moiety (“CLM”).
  • the CLM is coupled to a chemical linker (L) according to the structure:
  • L is a chemical linker group and CLM is a cereblon E3 Ubiquitin Ligase binding moiety.
  • CLM cereblon E3 Ubiquitin Ligase binding moiety.
  • ULM and CLM are used in their inclusive sense unless the context indicates otherwise.
  • ULM is inclusive of all ULMs, including those that bind cereblon (i.e., CLMs).
  • CLM is inclusive of all possible cereblon E3 Ubiquitin Ligase binding moieties.
  • the present disclosure provides bifunctional or multifunctional PROTAC compounds useful for regulating protein activity by inducing the degradation of a target protein.
  • the compound comprises a CLM coupled, e.g., linked covalently, directly or indirectly, to a moiety that binds a target protein (i.e., protein targeting moiety or “PTM”).
  • PTM protein targeting moiety
  • the CLM and PTM are joined or coupled via a chemical linker (L).
  • L chemical linker
  • the CLM recognizes the cereblon E3 ubiquitin ligase and the PTM recognizes a target protein and the interaction of the respective moieties with their targets facilitates the degradation of the target protein by placing the target protein in proximity to the ubiquitin ligase protein.
  • An exemplary bifunctional compound can be depicted as:
  • the bifunctional compound further comprises a chemical linker (“L”).
  • L a chemical linker
  • PTM is a protein/polypeptide targeting moiety
  • L is a linker
  • CLM is a cereblon E3 ligase binding moiety
  • the compounds as described herein comprise multiple PTMs (targeting the same or different protein targets), multiple CLMs, one or more ULMs (i.e., moieties that bind specifically to another E3 Ubiquitin Ligase, e.g., VHL) or a combination thereof.
  • the PTMs, CLMs, and ULMs can be coupled directly or via one or more chemical linkers or a combination thereof.
  • the ULMs can be for the same E3 Ubiquintin Ligase or each respective ULM can bind specifically to a different E3 Ubiquitin Ligase.
  • the PTMs can bind the same target protein or each respective PTM can bind specifically to a different target protein.
  • the description provides a compound which comprises a plurality of CLMs coupled directly or via a chemical linker moiety (L).
  • a compound having two CLMs can be depicted as:
  • the CLMs are identical.
  • the compound comprising a plurality of CLMs further comprises at least one PTM coupled to a CLM directly or via a chemical linker (L) or both.
  • the compound comprising a plurality of CLMs further comprises multiple PTMs.
  • the PTMs are the same or, optionally, different.
  • the respective PTMs may bind the same protein target or bind specifically to a different protein target.
  • the description provides a compound comprising at least two different CLMs coupled directly or via a chemical linker (L) or both.
  • a compound having two different CLMs can be depicted as:
  • CLM′ indicates a cereblon E3 Ubiquitin Ligase binding moiety that is structurally different from CLM.
  • the compound may comprise a plurality of CLMs and/or a plurality of CLM's.
  • the compound comprising at least two different CLMs, a plurality of CLMs, and/or a plurality of CLM's further comprises at least one PTM coupled to a CLM or a CLM′ directly or via a chemical linker or both.
  • a compound comprising at least two different CLMs can further comprise multiple PTMs.
  • the PTMs are the same or, optionally, different.
  • the respective PTMs may bind the same protein target or bind specifically to a different protein target.
  • the PTM itself is a ULM or CLM (or ULM′ or CLM′).
  • the CLM comprises a moiety that is a ligand of the cereblon E3 Ubiquitin Ligase (CRBN).
  • the CLM comprises a chemotype from the “imide” class of molecules.
  • the CLM comprises a phthalimido group or an analog or derivative thereof.
  • the CLM comprises a phthalimido-glutarimide group or an analog or derivative thereof.
  • the CLM comprises a member of the group consisting of thalidomide, lenalidomide, pomalidomide, and analogs or derivatives thereof.
  • the description provides the compounds as described herein including their enantiomers, diastereomers, solvates and polymorphs, including pharmaceutically acceptable salt forms thereof, e.g., acid and base salt forms.
  • the description provides compounds useful for binding and/or inhibiting cereblon E3 Ubiquitin Ligase binding moiety.
  • the compound has a chemical structure that includes at least one of (e.g., the compound has a chemical structure selected from the group consisting of):
  • the CLM comprises a chemical structure selected from the group:
  • the CLM or CLM′ is covalently joined to a PTM, a chemical linker group (L), a ULM, a CLM, a CLM′, or a combination thereof via an R group (such as, R, R 1 , R 2 , R 3 , R 4 or R′), W, X, or a Q group (such as, Q 1 , Q 2 , Q 3 , Q 4 , or Q 5 ).
  • R group such as, R, R 1 , R 2 , R 3 , R 4 or R′
  • W X
  • Q group such as, Q 1 , Q 2 , Q 3 , Q 4 , or Q 5
  • the CLM or CLM′ is covalently joined to a PTM, a chemical linker group (L), a ULM, a CLM, a CLM′, or a combination thereof via W, X, R, R 1 , R 2 , R 3 , R 4 , R 5 , R′, Q 1 , Q 2 , Q 3 , Q 4 , and Q 5 .
  • the W, X, R 1 , R 2 , R 3 , R 4 , R′, Q 1 , Q 2 , Q 3 , Q 4 , and Q 5 can independently be covalently coupled to a linker and/or a linker to which is attached to one or more PTM, ULM, ULM′, CLM or CLM′ groups.
  • alkyl shall mean within its context a linear, branch-chained or cyclic fully saturated hydrocarbon radical or alkyl group, preferably a C 1 -C 10 , more preferably a C 1 -C 6 , alternatively a C 1 -C 3 alkyl group, which may be optionally substituted.
  • alkyl groups are methyl, ethyl, n-butyl, sec-butyl, n-hexyl, n-heptyl, n-octyl, n-nonyl, n-decyl, isopropyl, 2-methylpropyl, cyclopropyl, cyclopropylmethyl, cyclobutyl, cyclopentyl, cyclopentylethyl, cyclohexylethyl and cyclohexyl, among others.
  • the alkyl group is end-capped with a halogen group (At, Br, Cl, F, or I).
  • compounds according to the present disclosure which may be used to covalently bind to dehalogenase enzymes.
  • These compounds generally contain a side chain (often linked through a polyethylene glycol group) which terminates in an alkyl group which has a halogen substituent (often chlorine or bromine) on its distal end which results in covalent binding of the compound containing such a moiety to the protein.
  • Alkoxy refers to an alkyl group singularly bonded to oxygen.
  • alkenyl refers to linear, branch-chained or cyclic C 2 -C 10 (preferably C 2 -C 6 ) hydrocarbon radicals containing at least one C ⁇ C bond.
  • Alkynyl refers to linear, branch-chained or cyclic C 2 -C 10 (preferably C 2 -C 6 ) hydrocarbon radicals containing at least one C ⁇ C bond.
  • alkylene when used, refers to a —(CH 2 ) n — group (n is an integer generally from 0-6), which may be optionally substituted.
  • the alkylene group preferably is substituted on one or more of the methylene groups with a C 1 -C 6 alkyl group (including a cyclopropyl group or a t-butyl group), but may also be substituted with one or more halo groups, preferably from 1 to 3 halo groups or one or two hydroxyl groups, O—(C 1 -C 6 alkyl) groups or amino acid sidechains as otherwise disclosed herein.
  • an alkylene group may be substituted with a urethane or alkoxy group (or other group) which is further substituted with a polyethylene glycol chain (of from 1 to 10, preferably 1 to 6, often 1 to 4 ethylene glycol units) to which is substituted (preferably, but not exclusively on the distal end of the polyethylene glycol chain) an alkyl chain substituted with a single halogen group, preferably a chlorine group.
  • a polyethylene glycol chain of from 1 to 10, preferably 1 to 6, often 1 to 4 ethylene glycol units
  • the alkylene (often, a methylene) group may be substituted with an amino acid sidechain group such as a sidechain group of a natural or unnatural amino acid, for example, alanine, ⁇ -alanine, arginine, asparagine, aspartic acid, cysteine, cystine, glutamic acid, glutamine, glycine, phenylalanine, histidine, isoleucine, lysine, leucine, methionine, proline, serine, threonine, valine, tryptophan or tyrosine.
  • an amino acid sidechain group such as a sidechain group of a natural or unnatural amino acid, for example, alanine, ⁇ -alanine, arginine, asparagine, aspartic acid, cysteine, cystine, glutamic acid, glutamine, glycine, phenylalanine, histidine, isoleucine, lysine, leucine, methion
  • unsubstituted shall mean substituted only with hydrogen atoms.
  • a range of carbon atoms which includes C 0 means that carbon is absent and is replaced with H.
  • a range of carbon atoms which is C 0 -C 6 includes carbons atoms of 1, 2, 3, 4, 5 and 6 and for C 0 , H stands in place of carbon.
  • substituted or “optionally substituted” shall mean independently (i.e., where more than substituent occurs, each substituent is independent of another substituent) one or more substituents (independently up to five substitutents, preferably up to three substituents, often 1 or 2 substituents on a moiety in a compound according to the present disclosure and may include substituents which themselves may be further substituted) at a carbon (or nitrogen) position anywhere on a molecule within context, and includes as substituents hydroxyl, thiol, carboxyl, cyano (C ⁇ N), nitro (NO 2 ), halogen (preferably, 1, 2 or 3 halogens, especially on an alkyl, especially a methyl group such as a trifluoromethyl), an alkyl group (preferably, C 1 -C 10 , more preferably, C 1 -C 6 ), aryl (especially phenyl and substituted phenyl for example benzyl or benzoyl), alkoxy group (
  • Substituents according to the present disclosure may include, for example —SiR 1sub R 2sub R 3sub groups where each of R 1sub and R 2sub is as otherwise described herein and R 3sub is H or a C 1 -C 6 alkyl group, preferably R 1sub , R 2sub , R 3sub in this context is a C 1 -C 3 alkyl group (including an isopropyl or t-butyl group).
  • Each of the above-described groups may be linked directly to the substituted moiety or alternatively, the substituent may be linked to the substituted moiety (preferably in the case of an aryl or heteroaryl moiety) through an optionally substituted —(CH 2 ) m — or alternatively an optionally substituted —(OCH 2 ) m —, —(OCH 2 CH 2 ) m — or —(CH 2 CH 2 O) m — group, which may be substituted with any one or more of the above-described substituents.
  • Alkylene groups —(CH 2 ) m — or —(CH 2 ) n — groups or other chains such as ethylene glycol chains, as identified above, may be substituted anywhere on the chain.
  • Preferred substitutents on alkylene groups include halogen or C 1 -C 6 (preferably C 1 -C 3 ) alkyl groups, which may be optionally substituted with one or two hydroxyl groups, one or two ether groups (O—C 1 -C 6 groups), up to three halo groups (preferably F), or a sidechain of an amino acid as otherwise described herein and optionally substituted amide (preferably carboxamide substituted as described above) or urethane groups (often with one or two C 0 -C 6 alkyl substitutents, which group(s) may be further substituted).
  • halogen or C 1 -C 6 (preferably C 1 -C 3 ) alkyl groups which may be optionally substituted with one or two hydroxyl groups, one or two ether groups (O—C 1 -C 6 groups), up to three halo groups (preferably F), or a sidechain of an amino acid as otherwise described herein and optionally substituted amide (preferably carboxamide substituted as described above)
  • the alkylene group (often a single methylene group) is substituted with one or two optionally substituted C 1 -C 6 alkyl groups, preferably C 1 -C 4 alkyl group, most often methyl or O-methyl groups or a sidechain of an amino acid as otherwise described herein.
  • a moiety in a molecule may be optionally substituted with up to five substituents, preferably up to three substituents. Most often, in the present disclosure, moieties which are substituted are substituted with one or two substituents.
  • substituted (each substituent being independent of any other substituent) shall also mean within its context of use C 1 -C 6 alkyl, C 1 -C 6 alkoxy, halogen, amido, carboxamido, sulfone, including sulfonamide, keto, carboxy, C 1 -C 6 ester (oxyester or carbonylester), C 1 -C 6 keto, urethane —O—C(O)—NR 1sub R 2sub or —N(R 1sub )—C(O)—O—R 1sub , nitro, cyano and amine (especially including a C 1 -C 6 alkylene-NR 1sub R 2sub , a mono- or di-C 1 -C 6 alkyl substituted amines which may be optionally substituted with one or two hydroxyl groups).
  • substituents will include for example, —NH—, —NHC(O)—, —O—, ⁇ O, —(CH 2 ) m — (here, m and n are in context, 1, 2, 3, 4, 5 or 6), —S—, —S(O)—, SO 2 — or —NH—C(O)—NH—, —(CH 2 ) n OH, —(CH 2 ) n SH, —(CH 2 ) n COOH, C 1 -C 6 alkyl, —(CH 2 ) n O—(C 1 -C 6 alkyl), —(CH 2 ) n —C(O)—(C 1 -C 6 alkyl), —(CH 2 ) n OC(O)—(C 1 -C 6 alkyl), —(CH 2 ) n C(O)O
  • R 1sub and R 2sub are each, within context, H or a C 1 -C 6 alkyl group (which may be optionally substituted with one or two hydroxyl groups or up to three halogen groups, preferably fluorine).
  • substituted shall also mean, within the chemical context of the compound defined and substituent used, an optionally substituted aryl or heteroaryl group or an optionally substituted heterocyclic group as otherwise described herein.
  • Alkylene groups may also be substituted as otherwise disclosed herein, preferably with optionally substituted C 1 -C 6 alkyl groups (methyl, ethyl or hydroxymethyl or hydroxyethyl is preferred, thus providing a chiral center), a sidechain of an amino acid group as otherwise described herein, an amido group as described hereinabove, or a urethane group O—C(O)—NR 1sub R 2sub group where R 1sub and R 2sub are as otherwise described herein, although numerous other groups may also be used as substituents.
  • Various optionally substituted moieties may be substituted with 3 or more substituents, preferably no more than 3 substituents and preferably with 1 or 2 substituents.
  • aryl or “aromatic”, in context, refers to a substituted (as otherwise described herein) or unsubstituted monovalent aromatic radical having a single ring (e.g., benzene, phenyl, benzyl) or condensed rings (e.g., naphthyl, anthracenyl, phenanthrenyl, etc.) and can be bound to the compound according to the present disclosure at any available stable position on the ring(s) or as otherwise indicated in the chemical structure presented.
  • aryl groups in context, may include heterocyclic aromatic ring systems, “heteroaryl” groups having one or more nitrogen, oxygen, or sulfur atoms in the ring (moncyclic) such as imidazole, furyl, pyrrole, furanyl, thiene, thiazole, pyridine, pyrimidine, pyrazine, triazole, oxazole or fused ring systems such as indole, quinoline, indolizine, azaindolizine, benzofurazan, etc., among others, which may be optionally substituted as described above.
  • heteroaryl groups having one or more nitrogen, oxygen, or sulfur atoms in the ring (moncyclic) such as imidazole, furyl, pyrrole, furanyl, thiene, thiazole, pyridine, pyrimidine, pyrazine, triazole, oxazole or fused ring systems such as indole, quinoline, indolizin
  • heteroaryl groups include nitrogen-containing heteroaryl groups such as pyrrole, pyridine, pyridone, pyridazine, pyrimidine, pyrazine, pyrazole, imidazole, triazole, triazine, tetrazole, indole, isoindole, indolizine, azaindolizine, purine, indazole, quinoline, dihydroquinoline, tetrahydroquinoline, isoquinoline, dihydroisoquinoline, tetrahydroisoquinoline, quinolizine, phthalazine, naphthyridine, quinoxaline, quinazoline, cinnoline, pteridine, imidazopyridine, imidazotriazine, pyrazinopyridazine, acridine, phenanthridine, carbazole, carbazoline, pyrimidine, phenanthroline
  • substituted aryl refers to an aromatic carbocyclic group comprised of at least one aromatic ring or of multiple condensed rings at least one of which being aromatic, wherein the ring(s) are substituted with one or more substituents.
  • an aryl group can comprise a substituent(s) selected from: —(CH 2 ) n OH, —(CH 2 ) n —O—(C 1 -C 6 )alkyl, —(CH 2 ) n —O—(CH 2 ) n —(C 1 -C 6 )alkyl, —(CH 2 ) n —C(O)(C 0 -C 6 ) alkyl, —(CH 2 ) n —C(O)O(C 0 -C 6 )alkyl, —(CH 2 ) n —OC(O)(C 0 -C 6 )alkyl, amine, mono- or di-(C 1 -C 6 alkyl) amine wherein the alkyl group on the amine is optionally substituted with 1 or 2 hydroxyl groups or up to three halo (preferably F, Cl) groups, OH, COOH, C 1 -C 6 alkyl,
  • Carboxyl denotes the group —C(O)OR, where R is hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, heteroaryl or substituted heteroaryl, whereas these generic substituents have meanings which are identical with definitions of the corresponding groups defined herein.
  • heteroaryl or “hetaryl” can mean but is in no way limited to an optionally substituted quinoline (which may be attached to the pharmacophore or substituted on any carbon atom within the quinoline ring), an optionally substituted indole (including dihydroindole), an optionally substituted indolizine, an optionally substituted azaindolizine (2, 3 or 4-azaindolizine) an optionally substituted benzimidazole, benzodiazole, benzoxofuran, an optionally substituted imidazole, an optionally substituted isoxazole, an optionally substituted oxazole (preferably methyl substituted), an optionally substituted diazole, an optionally substituted triazole, a tetrazole, an optionally substituted benzofuran, an optionally substituted thiophene, an optionally substituted thiazole (preferably methyl and/or thiol substituted), an optionally substituted is
  • Heterocycle refers to a cyclic group which contains at least one heteroatom, e.g., N, O or S, and may be aromatic (heteroaryl) or non-aromatic.
  • heteroaryl moieties are subsumed under the definition of heterocycle, depending on the context of its use. Exemplary heteroaryl groups are described hereinabove.
  • heterocyclics include: azetidinyl, benzimidazolyl, 1,4-benzodioxanyl, 1,3-benzodioxolyl, benzoxazolyl, benzothiazolyl, benzothienyl, dihydroimidazolyl, dihydropyranyl, dihydrofuranyl, dioxanyl, dioxolanyl, ethyleneurea, 1,3-dioxolane, 1,3-dioxane, 1,4-dioxane, furyl, homopiperidinyl, imidazolyl, imidazolinyl, imidazolidinyl, indolinyl, indolyl, isoquinolinyl, isothiazolidinyl, isothiazolyl, isoxazolidinyl, isoxazolyl, morpholinyl, naphthyridinyl, oxazolidinyl, oxazo
  • Heterocyclic groups can be optionally substituted with a member selected from the group consisting of alkoxy, substituted alkoxy, cycloalkyl, substituted cycloalkyl, cycloalkenyl, substituted cycloalkenyl, acyl, acylamino, acyloxy, amino, substituted amino, aminoacyl, aminoacyloxy, oxyaminoacyl, azido, cyano, halogen, hydroxyl, keto, thioketo, carboxy, carboxyalkyl, thioaryloxy, thioheteroaryloxy, thioheterocyclooxy, thiol, thioalkoxy, substituted thioalkoxy, aryl, aryloxy, heteroaryl, heteroaryloxy, heterocyclic, heterocyclooxy, hydroxyamino, alkoxyamino, nitro, —SO-alkyl, —SO-substituted alkyl, —SOary
  • heterocyclic groups can have a single ring or multiple condensed rings.
  • nitrogen heterocycles and heteroaryls include, but are not limited to, pyrrole, imidazole, pyrazole, pyridine, pyrazine, pyrimidine, pyridazine, indolizine, isoindole, indole, indazole, purine, quinolizine, isoquinoline, quinoline, phthalazine, naphthylpyridine, quinoxaline, quinazoline, cinnoline, pteridine, carbazole, carboline, phenanthridine, acridine, phenanthroline, isothiazole, phenazine, isoxazole, phenoxazine, phenothiazine, imidazolidine, imidazoline, piperidine, piperazine, indoline, morpholino, piperidinyl, tetrahydrofur
  • heterocyclic also includes bicyclic groups in which any of the heterocyclic rings is fused to a benzene ring or a cyclohexane ring or another heterocyclic ring (for example, indolyl, quinolyl, isoquinolyl, tetrahydroquinolyl, and the like).
  • cycloalkyl can mean but is in no way limited to univalent groups derived from monocyclic or polycyclic alkyl groups or cycloalkanes, as defined herein, e.g., saturated monocyclic hydrocarbon groups having from three to twenty carbon atoms in the ring, including, but not limited to, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl and the like.
  • substituted cycloalkyl can mean but is in no way limited to a monocyclic or polycyclic alkyl group and being substituted by one or more substituents, for example, amino, halogen, alkyl, substituted alkyl, carbyloxy, carbylmercapto, aryl, nitro, mercapto or sulfo, whereas these generic substituent groups have meanings which are identical with definitions of the corresponding groups as defined in this legend.
  • hydrocarbyl shall mean a compound which contains carbon and hydrogen and which may be fully saturated, partially unsaturated or aromatic and includes aryl groups, alkyl groups, alkenyl groups and alkynyl groups.
  • lower alkyl refers to methyl, ethyl or propyl
  • lower alkoxy refers to methoxy, ethoxy or propoxy.
  • CLMs include those shown below as well as “hybrid” molecules or compounds that arise from combining 1 or more features of the following compounds:
  • the W, R 1 , R 2 , Q 1 , Q 2 , Q 3 , Q 4 , and Rn can independently be covalently coupled to a linker and/or a linker to which is attached one or more PTM, ULM, ULM′, CLM or CLM′ groups.
  • the R 1 , R 2 , Q 1 , Q 2 , Q 3 , Q 4 , and Rn can independently be covalently coupled to a linker and/or a linker to which is attached one or more PTM, ULM, ULM′, CLM or CLM′ groups.
  • the Q 1 , Q 2 , Q 3 , Q 4 , and Rn can independently be covalently coupled to a linker and/or a linker to which is attached one or more PTM, ULM, ULM′, CLM or CLM′ groups.
  • R n is modified to be covalently joined to the linker group (L), a PTM, a ULM, a second CLM having the same chemical structure as the CLM, a CLM′, a second linker, or any multiple or combination thereof.
  • the CLM is selected from:
  • R′ is a halogen and R 1 is as described in any aspect or embodiment described herein.
  • CLM can be imides that bind to cereblon E3 ligase.
  • These imides and linker attachment point can be but not limited to the following structures:
  • the compounds as described herein include one or more CLMs chemically linked or coupled to one or more PTMs (e.g., PTM and/or PTM′), ULMs (e.g., ULM, ULM′, and/or CLM′) via a chemical linker (L).
  • the linker group L is a group comprising one or more covalently connected structural units (e.g., -A L 1 . . .
  • a L q (A L ) q - or -(A L ) q -), wherein A 1 is a group coupled to PTM, and Aq is a group coupled to at least one of a ULM, a ULM′, a CLM, a CLM′, or a combination thereof.
  • a L 1 links a CLM or CLM′ directly to another ULM, PTM, or combination thereof.
  • a L 1 links a CLM or CLM′ indirectly to another ULM, PTM, or combination thereof through A q .
  • the linker group is -(A L ) q -, wherein
  • q of the linker is an integer greater than or equal to 0. In certain embodiments, q is an integer greater than or equal to 1.
  • a L q is a group which is connected to a ULM or ULM′ moiety (such as CLM or CLM′), and A L 1 and A L q are connected via structural units of the linker (L).
  • a L q is a group which is connected to A L 1 and to a ULM or a ULM′ moiety (such as CLM or CLM′).
  • the structure of the linker group L is -A L 1 -, and A L 1 is a group which is connected to a ULM or ULM′ moiety (such as CLM or CLM′) and a PTM moiety.
  • the linker (L) comprises a group represented by a general structure selected from the group consisting of:
  • the linker (L) comprises a group represented by a general structure selected from the group consisting of:
  • the linker (L) is selected from the group consisting of:
  • each m and n is independently selected from 0, 1, 2, 3, 4, 5, or 6.
  • the linker (L) is selected from the group consisting of:
  • each m, n, o, p, q, and r is independently 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, or 20.
  • L is selected from the group consisting of:
  • the linker (L) comprises a structure selected from, but not limited to the structure shown below, where a dashed line indicates the attachment point to the PTM or ULM moieties:
  • the linker (L) comprises a structure selected from, but not limited to the structure shown below, where a dashed line indicates the attachment point to the PTM or ULM moieties:
  • the linker group is optionally substituted (poly)ethyleneglycol having between 1 and about 100 ethylene glycol units, between about 1 and about 50 ethylene glycol units, between 1 and about 25 ethylene glycol units, between about 1 and 10 ethylene glycol units, between 1 and about 8 ethylene glycol units and 1 and 6 ethylene glycol units, between 2 and 4 ethylene glycol units, or optionally substituted alkyl groups interdispersed with optionally substituted, O, N, S, P or Si atoms.
  • the linker is substituted with an aryl, phenyl, benzyl, alkyl, alkylene, or heterocycle group.
  • the linker may be asymmetric or symmetrical.
  • the linker group may be any suitable moiety as described herein.
  • the linker is a substituted or unsubstituted polyethylene glycol group ranging in size from about 1 to about 12 ethylene glycol units, between 1 and about 10 ethylene glycol units, about 2 about 6 ethylene glycol units, between about 2 and 5 ethylene glycol units, between about 2 and 4 ethylene glycol units.
  • the present disclosure is directed to a compound which comprises a PTM group, which binds to a target protein or polypeptide, which is ubiquitinated by an ubiquitin ligase and is chemically linked directly to the ULM group (such as CLM) or through a linker moiety L, or PTM is alternatively a ULM′ group (such as CLM′) which is also a ubiquitin ligase binding moiety, which may be the same or different than the ULM group as described above and is linked directly to the ULM group directly or through the linker moiety; and L is a linker moiety as described above which may be present or absent and which chemically (covalently) links ULM to PTM, or a pharmaceutically acceptable salt, enantiomer, stereoisomer, solvate or polymorph thereof.
  • PTM is alternatively a ULM′ group (such as CLM′) which is also a ubiquitin ligase binding moiety, which may be the same or different than the ULM group
  • the linker group L is a group comprising one or more covalently connected structural units independently selected from the group consisting of:
  • the X is selected from the group consisting of O, N, S, S(O) and SO 2 ; n is integer from 1 to 5; R L1 is hydrogen or alkyl,
  • aryl or heteroaryl is a mono- or bicyclic aryl or heteroaryl optionally substituted with 1-3 substituents selected from alkyl, halogen, haloalkyl, hydroxy, alkoxy or cyano;
  • the linker group L comprises up to 10 covalently connected structural units, as described above.
  • the linker is independently covalently bonded to the ULM group and the PTM group preferably through an amide, ester, thioester, keto group, carbamate (urethane), carbon or ether, each of which groups may be inserted anywhere on the ULM group and PTM group to provide maximum binding of the ULM group on the ubiquitin ligase and the PTM group on the target protein to be degraded.
  • the linker may be linked to an optionally substituted alkyl, alkylene, alkene or alkyne group, an aryl group or a heterocyclic group on the ULM and/or PTM groups.
  • q is an integer from 1 to 100, 1 to 90, 1 to 80, 1 to 70, 1 to 60, 1 to 50, 1 to 40, 1 to 30, 1 to 20, or 1 to 10.
  • the linker (L) is selected from the group consisting of:
  • the linker group is optionally substituted (poly)ethyleneglycol having between 1 and about 100 ethylene glycol units, between about 1 and about 50 ethylene glycol units, between 1 and about 25 ethylene glycol units, between about 1 and 10 ethylene glycol units, between 1 and about 8 ethylene glycol units and 1 and 6 ethylene glycol units, between 2 and 4 ethylene glycol units, or optionally substituted alkyl groups interdispersed with optionally substituted, O, N, S, P or Si atoms.
  • the linker is substituted with an aryl, phenyl, benzyl, alkyl, alkylene, or heterocycle group.
  • the linker may be asymmetric or symmetrical.
  • the linker group may be any suitable moiety as described herein.
  • the linker is a substituted or unsubstituted polyethylene glycol group ranging in size from about 1 to about 12 ethylene glycol units, between 1 and about 10 ethylene glycol units, about 2 about 6 ethylene glycol units, between about 2 and 5 ethylene glycol units, between about 2 and 4 ethylene glycol units.
  • the linker is independently covalently bonded to the CLM group and the PTM group preferably through an amide, ester, thioester, keto group, carbamate (urethane), carbon or ether, each of which groups may be inserted anywhere on the CLM group and PTM group to provide maximum binding of the CLM group on the ubiquitin ligase and the PTM group on the target protein to be degraded.
  • the target protein for degradation may be the ubiquitin ligase itself).
  • the linker may be linked to an optionally substituted alkyl, alkylene, alkene or alkyne group, an aryl group or a heterocyclic group on the CLM and/or PTM groups.
  • “L” can be linear chains with linear atoms from 4 to 24, the carbon atom in the linear chain can be substituted with oxygen, nitrogen, amide, fluorinated carbon, etc., such as the following:
  • “L” can be nonlinear chains, and can be aliphatic or aromatic or heteroaromatic cyclic moieties, some examples of “L” include but not be limited to the following:
  • the PTM group is a group, which binds to target proteins.
  • Targets of the PTM group are numerous in kind and are selected from proteins that are expressed in a cell such that at least a portion of the sequences is found in the cell and may bind to a PTM group.
  • the term “protein” includes oligopeptides and polypeptide sequences of sufficient length that they can bind to a PTM group according to the present disclosure. Any protein in a eukaryotic system or a microbial system, including a virus, bacteria or fungus, as otherwise described herein, are targets for ubiquitination mediated by the compounds according to the present disclosure.
  • the target protein is a eukaryotic protein.
  • the protein binding moiety is a haloalkane (preferably a C 1 -C 10 alkyl group which is substituted with at least one halo group, preferably a halo group at the distal end of the alkyl group, i.e., away from the linker or CLM group), which may covalently bind to a dehalogenase enzyme in a patient or subject or in a diagnostic assay.
  • a haloalkane preferably a C 1 -C 10 alkyl group which is substituted with at least one halo group, preferably a halo group at the distal end of the alkyl group, i.e., away from the linker or CLM group
  • PTM groups include, for example, include any moiety which binds to a protein specifically (binds to a target protein) and includes the following non-limiting examples of small molecule target protein moieties: Hsp90 inhibitors, kinase inhibitors, androgen receptor inhibitors, HDM2 & MDM2 inhibitors, compounds targeting Human BET Bromodomain-containing proteins, HDAC inhibitors, human lysine methyltransferase inhibitors, angiogenesis inhibitors, nuclear hormone receptor compounds, immunosuppressive compounds, and compounds targeting the aryl hydrocarbon receptor (AHR), among numerous others.
  • the compositions described below exemplify some of the members of these nine types of small molecule target protein binding moieties.
  • Such small molecule target protein binding moieties also include pharmaceutically acceptable salts, enantiomers, solvates and polymorphs of these compositions, as well as other small molecules that may target a protein of interest.
  • These binding moieties are linked to the ubiquitin ligase binding moiety preferably through a linker in order to present a target protein (to which the protein target moiety is bound) in proximity to the ubiquitin ligase for ubiquitination and degradation.
  • target proteins may include, for example, structural proteins, receptors, enzymes, cell surface proteins, proteins pertinent to the integrated function of a cell, including proteins involved in catalytic activity, aromatase activity, motor activity, helicase activity, metabolic processes (anabolism and catabolism), antioxidant activity, proteolysis, biosynthesis, proteins with kinase activity, oxidoreductase activity, transferase activity, hydrolase activity, lyase activity, isomerase activity, ligase activity, enzyme regulator activity, signal transducer activity, structural molecule activity, binding activity (protein, lipid carbohydrate), receptor activity, cell motility, membrane fusion, cell communication, regulation of biological processes, development, cell differentiation, response to stimulus, behavioral proteins, cell adhesion proteins, proteins involved in cell death, proteins involved in transport (including protein transporter activity,
  • Proteins of interest can include proteins from eurkaryotes and prokaryotes including humans as targets for drug therapy, other animals, including domesticated animals, microbials for the determination of targets for antibiotics and other antimicrobials and plants, and even viruses, among numerous others.
  • the PTM group is a haloalkyl group, wherein said alkyl group generally ranges in size from about 1 or 2 carbons to about 12 carbons in length, often about 2 to 10 carbons in length, often about 3 carbons to about 8 carbons in length, more often about 4 carbons to about 6 carbons in length.
  • the haloalkyl groups are generally linear alkyl groups (although branched-chain alkyl groups may also be used) and are end-capped with at least one halogen group, preferably a single halogen group, often a single chloride group.
  • Haloalkyl PT groups for use in the present disclosure are preferably represented by the chemical structure —(CH 2 ) v -Halo where v is any integer from 2 to about 12, often about 3 to about 8, more often about 4 to about 6.
  • Halo may be any halogen, but is preferably Cl or Br, more often Cl.
  • the present disclosure provides a library of compounds.
  • the library comprises more than one compound wherein each composition has a formula of A-B, wherein A is a ubiquitin pathway protein binding moiety (preferably, an E3 ubiquitin ligase moiety as otherwise disclosed herein) and B is a protein binding member of a molecular library, wherein A is coupled (preferably, through a linker moiety) to B, and wherein the ubiquitin pathway protein binding moiety recognizes an ubiquitin pathway protein, in particular, an E3 ubiquitin ligase, such as cereblon.
  • A is a ubiquitin pathway protein binding moiety (preferably, an E3 ubiquitin ligase moiety as otherwise disclosed herein)
  • B is a protein binding member of a molecular library, wherein A is coupled (preferably, through a linker moiety) to B, and wherein the ubiquitin pathway protein binding moiety recognizes an ubiquitin pathway protein, in particular, an E3 ubiquitin
  • the library contains a specific cereblon E3 ubiquitin ligase binding moiety bound to random target protein binding elements (e.g., a chemical compound library).
  • target protein e.g., a chemical compound library.
  • the target protein is not determined in advance and the method can be used to determine the activity of a putative protein binding element and its pharmacological value as a target upon degradation by ubiquitin ligase.
  • the present disclosure may be used to treat a number of disease states and/or conditions, including any disease state and/or condition in which proteins are dysregulated and where a patient would benefit from the degradation of proteins.
  • the description provides therapeutic compositions comprising an effective amount of a compound as described herein or salt form thereof, and a pharmaceutically acceptable carrier, additive or excipient, and optionally an additional bioactive agent.
  • the therapeutic compositions modulate protein degradation in a patient or subject, for example, an animal such as a human, and can be used for treating or ameliorating disease states or conditions which are modulated through the degraded protein.
  • the therapeutic compositions as described herein may be used to effectuate the degradation of proteins of interest for the treatment or amelioration of a disease, e.g., cancer (such as prostate cancer) and Kennedy's Disease.
  • the disease is prostate cancer.
  • the present disclosure relates to a method for treating a disease state or ameliorating the symptoms of a disease or condition in a subject in need thereof by degrading a protein or polypeptide through which a disease state or condition is modulated comprising administering to said patient or subject an effective amount, e.g., a therapeutically effective amount, of at least one compound as described hereinabove, optionally in combination with a pharmaceutically acceptable carrier, additive or excipient, and optionally an additional bioactive agent, wherein the composition is effective for treating or ameliorating the disease or disorder or symptom thereof in the subject.
  • the method according to the present disclosure may be used to treat a large number of disease states or conditions including cancer, by virtue of the administration of effective amounts of at least one compound described herein.
  • the disease state or condition may be a disease caused by a microbial agent or other exogenous agent such as a virus, bacteria, fungus, protozoa or other microbe or may be a disease state, which is caused by overexpression of a protein, which leads to a disease state and/or condition.
  • the description provides methods for identifying the effects of the degradation of proteins of interest in a biological system using compounds according to the present disclosure.
  • target protein is used to describe a protein or polypeptide, which is a target for binding to a compound according to the present disclosure and degradation by ubiquitin ligase hereunder.
  • target protein binding moieties also include pharmaceutically acceptable salts, enantiomers, solvates and polymorphs of these compositions, as well as other small molecules that may target a protein of interest. These binding moieties are linked to CLM or ULM groups through linker groups L.
  • Target proteins which may be bound to the protein target moiety and degraded by the ligase to which the ubiquitin ligase binding moiety is bound include any protein or peptide, including fragments thereof, analogues thereof, and/or homologues thereof.
  • Target proteins include proteins and peptides having any biological function or activity including structural, regulatory, hormonal, enzymatic, genetic, immunological, contractile, storage, transportation, and signal transduction.
  • the target proteins include structural proteins, receptors, enzymes, cell surface proteins, proteins pertinent to the integrated function of a cell, including proteins involved in catalytic activity, aromatase activity, motor activity, helicase activity, metabolic processes (anabolism and catabolism), antioxidant activity, proteolysis, biosynthesis, proteins with kinase activity, oxidoreductase activity, transferase activity, hydrolase activity, lyase activity, isomerase activity, ligase activity, enzyme regulator activity, signal transducer activity, structural molecule activity, binding activity (protein, lipid carbohydrate), receptor activity, cell motility, membrane fusion, cell communication, regulation of biological processes, development, cell differentiation, response to stimulus, behavioral proteins, cell adhesion proteins, proteins involved in cell death, proteins involved in transport (including protein transporter activity, nuclear transport, ion transporter activity, channel transporter activity, carrier activity, permease activity, secretion activity, electron transporter activity, pathogenesis, chaperone regulator activity, nucleic acid binding activity,
  • Proteins of interest can include proteins from eukaryotes and prokaryotes, including microbes, viruses, fungi and parasites, including humans, microbes, viruses, fungi and parasites, among numerous others, as targets for drug therapy, other animals, including domesticated animals, microbials for the determination of targets for antibiotics and other antimicrobials and plants, and even viruses, among numerous others.
  • a number of drug targets for human therapeutics represent protein targets to which protein target moiety may be bound and incorporated into compounds according to the present disclosure.
  • proteins which may be used to restore function in numerous polygenic diseases including for example B7.1 and B7, TINFR1m, TNFR2, NADPH oxidase, BclIBax and other partners in the apotosis pathway, C5a receptor, HMG-CoA reductase, PDE V phosphodiesterase type, PDE IV phosphodiesterase type 4, PDE I, PDEII, PDEIII, squalene cyclase inhibitor, CXCR1, CXCR2, nitric oxide (NO) synthase, cyclo-oxygenase 1, cyclo-oxygenase 2, 5HT receptors, dopamine receptors, G Proteins, i.e., Gq, histamine receptors, 5-lipoxygenase, tryptase serine protease, thy
  • Additional protein targets include, for example, ecdysone 20-monooxygenase, ion channel of the GABA gated chloride channel, acetylcholinesterase, voltage-sensitive sodium channel protein, calcium release channel, and chloride channels. Still further target proteins include Acetyl-CoA carboxylase, adenylosuccinate synthetase, protoporphyrinogen oxidase, and enolpyruvylshikimate-phosphate synthase.
  • Haloalkane dehalogenase enzymes are another target of specific compounds according to the present disclosure.
  • Compounds according to the present disclosure which contain chloroalkane peptide binding moieties may be used to inhibit and/or degrade haloalkane dehalogenase enzymes which are used in fusion proteins or related dioagnostic proteins as described in PCT/US2012/063401 filed Dec. 6, 2011 and published as WO 2012/078559 on Jun. 14, 2012, the contents of which is incorporated by reference herein.
  • protein target moiety or PTM is used to describe a small molecule which binds to a target protein or other protein or polypeptide of interest and places/presents that protein or polypeptide in proximity to an ubiquitin ligase such that degradation of the protein or polypeptide by ubiquitin ligase may occur.
  • small molecule target protein binding moieties include Hsp90 inhibitors, kinase inhibitors, MDM2 inhibitors, compounds targeting Human BET Bromodomain-containing proteins, HDAC inhibitors, human lysine methyltransferase inhibitors, angiogenesis inhibitors, immunosuppressive compounds, and compounds targeting the aryl hydrocarbon receptor (AHR), among numerous others.
  • AHR aryl hydrocarbon receptor
  • Exemplary protein target moieties include, haloalkane halogenase inhibitors, Hsp90 inhibitors, kinase inhibitors, MDM2 inhibitors, compounds targeting Human BET Bromodomain-containing proteins, HDAC inhibitors, human lysine methyltransferase inhibitors, angiogenesis inhibitors, immunosuppressive compounds, and compounds targeting the aryl hydrocarbon receptor (AHR).
  • haloalkane halogenase inhibitors include, haloalkane halogenase inhibitors, Hsp90 inhibitors, kinase inhibitors, MDM2 inhibitors, compounds targeting Human BET Bromodomain-containing proteins, HDAC inhibitors, human lysine methyltransferase inhibitors, angiogenesis inhibitors, immunosuppressive compounds, and compounds targeting the aryl hydrocarbon receptor (AHR).
  • AHR aryl hydrocarbon receptor
  • compositions described below exemplify some of the members of these types of small molecule target protein binding moieties.
  • Such small molecule target protein binding moieties also include pharmaceutically acceptable salts, enantiomers, solvates and polymorphs of these compositions, as well as other small molecules that may target a protein of interest. References which are cited hereinbelow are incorporated by reference herein in their entirety.
  • HSP90 Heat Shock Protein 90
  • HSP90 inhibitors as used herein include, but are not limited to:
  • HSP90 inhibitor p54 8-[(2,4-dimethylphenyl)sulfanyl]-3]pent-4-yn-1-yl-3H-purin-6-amine:
  • linker group L or a -(L-CLM) group is attached, for example, via the terminal acetylene group;
  • linker group L or a -(L-CLM) group is attached, for example, via the amide group (at the amine or at the alkyl group on the amine);
  • HSP90 inhibitors modified (modified) identified in Wright, et al., Structure-Activity Relationships in Purine-Based Inhibitor Binding to HSP90 Isoforms, Chem Biol. 2004 June; 11(6):775-85, including the HSP90 inhibitor PU3 having the structure:
  • HSP90 inhibitor geldanamycin ((4E,6Z,8S,9S,10E,12S,13R,14S,16R)-13-hydroxy-8,14,19-trimethoxy-4,10,12,16-tetramethyl-3,20,22-trioxo-2-azabicyclo[16.3.1] (derivatized) or any of its derivatives (e.g.
  • 17-alkylamino-17-desmethoxygeldanamycin (“17-AAG”) or 17-(2-dimethylaminoethyl)amino-17-desmethoxygeldanamycin (“17-DMAG”)) (derivatized, where a linker group L or a -(L-CLM) group is attached, for example, via the amide group).
  • Kinase inhibitors as used herein include, but are not limited to:
  • R is a linker group L or a -(L-CLM) group attached, for example, via the ether group;
  • R is a linker group L or a -(L-CLM) group attached, for example, to the pyrrole moiety;
  • R is a linker group L or a -(L-CLM) group attached, for example, to the amide moiety;
  • R is a linker group L or a -(L-CLM) attached, for example, to the pyrimidine;
  • linker group L or a -(L-CLM) group is attached, for example, via the terminal methyl of the sulfonyl methyl group;
  • linker group L or a -(L-CLM) group is attached, for example, via the amine (aniline), carboxylic acid or amine alpha to cyclopropyl group, or cyclopropyl group;
  • linker group L or a -(L-CLM) group is attached, for example, preferably via either the i-propyl group or the t-butyl group;
  • linker group L or a -(L-CLM) group is attached, for example, via the terminal methyl group bound to amide moiety;
  • linker group L or a -(L-CLM) group is attached, for example, via the terminal methyl group bound to the amide moiety;
  • linker group L or a -(L-CLM) group is attached, for example, via the secondary amine or terminal amino group;
  • kinase inhibitors identified in Lountos, et al., “Structural Characterization of Inhibitor Complexes with Checkpoint Kinase 2 (Chk2), a Drug Target for Cancer Therapy”, J. STRUCT. BIOL . vol: 176, pag: 292 (2011), including the kinase inhibitor YCF having the structure:
  • linker group L or a -(L-CLM) group is attached, for example, via either of the terminal hydroxyl groups;
  • linker group L or a -(L-CLM) group is attached, for example, via the terminal hydroxyl group (XK9) or the hydrazone group (NXP);
  • kinase inhibitor afatinib (derivatized) (N-[4-[(3-chloro-4-fluorophenyl)amino]-7-[[(3S)-tetrahydro-3-furanyl]oxy]-6-quinazolinyl]-4(dimethylamino)-2-butenamide) (Derivatized where a linker group L or a -(L-CLM) group is attached, for example, via the aliphatic amine group);
  • the kinase inhibitor fostamatinib derivatized ([6-( ⁇ 5-fluoro-2-[(3,4,5-trimethoxyphenyl)amino]pyrimidin-4-yl ⁇ amino)-2,2-dimethyl-3-oxo-2,3-dihydro-4H-pyrido[3,2-b]-1,4-oxazin-4-yl]methyl disodium phosphate hexahydrate) (Derivatized where a linker group L or a -(L-CLM) group is attached, for example, via a methoxy group);
  • kinase inhibitor gefitinib (derivatized) (N-(3-chloro-4-fluoro-phenyl)-7-methoxy-6-(3-morpholin-4-ylpropoxy)quinazolin-4-amine):
  • linker group L or a -(L-CLM) group is attached, for example, via a methoxy or ether group;
  • kinase inhibitor lenvatinib (derivatized) (4-[3-chloro-4-(cyclopropylcarbamoylamino)phenoxy]-7-methoxy-quinoline-6-carboxamide) (derivatized where a linker group L or a -(L-CLM) group is attached, for example, via the cyclopropyl group);
  • kinase inhibitor vandetanib (N-(4-bromo-2-fluorophenyl)-6-methoxy-7-[(1-methylpiperidin-4-yl)methoxy]quinazolin-4-amine) (derivatized where a linker group L or a -(L-CLM) group is attached, for example, via the methoxy or hydroxyl group);
  • vemurafenib derivatized (propane-1-sulfonic acid ⁇ 3-[5-(4-chlorophenyl)-1H-pyrrolo[2,3-b]pyridine-3-carbonyl]-2,4-difluoro-phenyl ⁇ -amide), derivatized where a linker group L or a -(L-CLM) group is attached, for example, via the sulfonyl propyl group;
  • R as a linker group L or a -(L-CLM) group is attached, for example, via the amide group or via the aniline amine group;
  • kinase inhibitor pazopanib derivatized (VEGFR3 inhibitor):
  • R is a linker group L or a -(L-CLM) group attached, for example, to the phenyl moiety or via the aniline amine group;
  • R is a linker group L or a -(L-CLM) group attached, for example, to the phenyl moiety
  • R is a linker group L or a -(L-CLM) group attached, for example, to the phenyl moiety
  • R is a linker group L or a -(L-CLM) group attached, for example, to the phenyl moiety or the aniline amine group;
  • R is a linker group L or a -(L-CLM) group attached, for example, to the phenyl moiety or the diazole group;
  • R is a linker group L or a -(L-CLM) group attached, for example, to the phenyl moiety or the diazole group;
  • R is a linker group L or a -(L-CLM) group attached, for example, to the phenyl moiety;
  • R is a linker group L or a -(L-CLM) group attached, for example, to the phenyl moiety or a hydroxyl or ether group on the quinoline moiety;
  • linker group L or a -(L-CLM) group is attached, for example, at R, as indicated;
  • linker group L or a -(L-CLM) group is attached, for example, at R;
  • linker group L or a -(L-CLM) group is attached, for example, at R;
  • linker group L or a -(L-CLM) group is attached, for example, at R;
  • linker group L or a -(L-CLM) group is attached, for example, at R;
  • linker group L or a -(L-CLM) group is attached, for example, at R.
  • R designates a site for attachment of a linker group L or a -(L-CLM) group on the piperazine moiety.
  • HDM2/MDM2 Inhibitors
  • HDM2/MDM2 inhibitors as used herein include, but are not limited to:
  • PTM can be ligands binding to Bromo- and Extra-terminal (BET) proteins BRD2, BRD3 and BRD4.
  • BET Bromo- and Extra-terminal
  • Compounds targeting Human BET Bromodomain-containing proteins include, but are not limited to the compounds associated with the targets as described below, where “R” or “linker” designates a site for linker group L or a -(L-CLM) group attachment, for example:
  • R or L or linker designates a site for attachment, for example, of a linker group L or a -(L-CLM) group).
  • the claimed structure the PTM may be composed of tricyclic diazepine or tricyclic azepine as BET/BRD4 ligand (PTM-a), where the dashed lines indicate the linker connection trajectory and three sites are defined to which linkers may be attached:
  • PTM-a can be represented by the following general structures, where dashed line indicates a possible linker connection point.
  • the substitution pattern of X and Y can be mono- or bis-substitution.
  • X Cl, F, Br, H, CN, methyl, acetylene, methoxy
  • X Cl, F, Br, H, CN, methyl, acetylene, methoxy
  • R lower alkyl, aryl, substituted aryl
  • Y mono- or di-substitution
  • Y Me
  • OMe OMe
  • R lower alkyl, aryl, substituted aryl
  • X Cl, F, Br, H, CN, methyl, acetylene, methoxy
  • X Cl, F, Br, H, CN, methyl, acetylene, methoxy
  • the structures of PTM-a as the BET/BRD4 ligand includes, wherein the dashed line indicates the connection point between BET/BRD4 ligand and the linkers:
  • the description provides, but not limited to, the following exemplary BET PROTAC (compounds 1 or 2), including salts, prodrugs, polymorphs, analogs, derivatives, and deuterated forms thereof:
  • HDAC Inhibitors include, but are not limited to:
  • Human Lysine Methyltransferase inhibitors include, but are not limited to:
  • R designates a site for attachment, for example, of a linker group L or a -(L-CLM) group
  • R designates a potential site for attachment, for example, of a linker group L or a -(L-CLM) group
  • Azacitidine (4-amino-1- ⁇ -D-ribofuranosyl-1,3,5-triazin-2(1H)-one) (Derivatized where a linker group L or a -(L-CLM) group is attached, for example, via the hydroxy or amino groups); and
  • Angiogenesis inhibitors include, but are not limited to:
  • GA-1 derivatized and derivatives and analogs thereof, having the structure(s) and binding to linkers as described in Sakamoto, et al., Development of Protacs to target cancer-promoting proteins for ubiquitination and degradation, Mol Cell Proteomics 2003 Dec.; 2(12):1350-8;
  • Estradiol which may be bound to a linker group L or a -(L-CLM) group as is generally described in Rodriguez-Gonzalez, et al., Targeting steroid hormone receptors for ubiquitination and degradation in breast and prostate cancer, Oncogene (2008) 27, 7201-7211;
  • Estradiol, testosterone (derivatized) and related derivatives including but not limited to DHT and derivatives and analogs thereof, having the structure(s) and binding to a linker group L or a -(L-CLM) group as generally described in Sakamoto, et al., Development of Protacs to target cancer-promoting proteins for ubiquitination and degradation, Mol Cell Proteomics 2003 Dec.; 2(12):1350-8; and
  • Immunosuppressive compounds include, but are not limited to:
  • Glucocorticoids e.g., hydrocortisone, prednisone, prednisolone, and methylprednisolone
  • Glucocorticoids (e.g., hydrocortisone, prednisone, prednisolone, and methylprednisolone) (Derivatized where a linker group L or a -(L-CLM) group is to bound, e.g. to any of the hydroxyls) and beclometasone dipropionate (Derivatized where a linker group or a -(L-CLM) is bound, e.g. to a proprionate);
  • Methotrexate (Derivatized where a linker group or a -(L-CLM) group can be bound, e.g. to either of the terminal hydroxyls);
  • Ciclosporin (Derivatized where a linker group or a -(L-CLM) group can be bound, e.g. at any of the butyl groups);
  • Tacrolimus FK-506
  • rapamycin Derivatized where a linker group L or a -(L-CLM) group can be bound, e.g. at one of the methoxy groups
  • Actinomycins (Derivatized where a linker group L or a -(L-CLM) group can be bound, e.g. at one of the isopropyl groups).
  • AHR aryl hydrocarbon receptor
  • SR1 and LGC006 (derivatized such that a linker group L or a -(L-CLM) is bound), as described in Boitano, et al., Aryl Hydrocarbon Receptor Antagonists Promote the Expansion of Human Hematopoietic Stem Cells, Science 10 Sep. 2010: Vol. 329 no. 5997 pp. 1345-1348.
  • the PTM is a chemical moiety that binds to the androgen receptor (AR) (ABM).
  • AR androgen receptor
  • Various androgen receptor binding compounds have been described in literature, including various androgen derivatives such as testosterone, dihydrotestosterone, and metribolone (also known as methyltrienolone or R1881), and non-steroidal compounds such as bicalutamide, enzalutamide, some of which are described above.
  • Those of ordinary skill in the art would appreciate that these androgen receptor binding compounds could be potentially used as an ABM moiety in a PROTAC compound.
  • Such literature includes, but not limited to, G. F. Allan et.
  • the ABM comprises a structure selected from, but not limited to the structures shown below, wherein a dashed line indicates the attachment point of a linker moiety or a ULM, such as a CLM:
  • the W 2 is covalently coupled to one or more ULM or CLM groups, or a linker to which is attached one or more ULM or CLM groups as described herein.
  • W 1 is
  • each R 22 is independently halo, H, optionally substituted alkyl, haloalkyl, cyano, or nitro; and each R 23 is independently H, halo, CF 3 , optionally substituted alkyl, alkoxy, haloalkyl, cyano, or nitro.
  • W 1 is selected from the group consisting of:
  • the ABM comprises a structure selected from the following structures shown below, where a indicates the attachment point of a linker or a ULM:
  • each R Q is independently H or CH 3 .
  • R Q3 is CN.
  • the ABM comprises a structure selected from the following structures shown below, where a indicates the attachment point of a linker or a ULM:
  • R Q3 is a CN.
  • the ABM comprises a structure shown below, where a dashed line indicates the attachment point of a linker moiety or a ULM or a CLM:
  • the W 2 is covalently coupled to one or more ULM or CLM groups, or a linker to which is attached one or more ULM or CLM groups as described herein.
  • W 1 is selected from the group consisting of:
  • W 2 is selected from the group consisting of:
  • the ABM comprises a structure selected from, but not limited to the structures shown below, where a dashed line indicates the attachment point of a linker moiety or a ULM:
  • the W 2 is covalently coupled to one or more ULM or CLM groups, or a linker to which is attached one or more ULM or CLM groups as described herein.
  • W 1 is selected from the group consisting of:
  • W2 is selected from the group consisting of:
  • ABM is selected from the group consisting of:
  • the ABM comprises the structure:
  • an androgen receptor binding compound comprising a structure of:
  • an androgen receptor binding moiety has a structure of:
  • W 2 is selected from the group consisting of:
  • the W 2 is covalently coupled to one or more ULM or CLM groups, or a linker to which is attached one or more ULM or CLM groups as described herein.
  • W 1 is selected from the group consisting of:
  • an androgen binding moiety has a structure of:
  • the W 2 is covalently coupled to one or more ULM or CLM groups, or a linker to which is attached one or more ULM or CLM groups as described herein.
  • W 1 is
  • each R 22 is independently halo or CN; and each R 23 is independently H or halo.
  • W 1 is selected from the group consisting of:
  • W 2 is
  • (Y 3 ) 0-5 is
  • the ABM comprises a structure selected from, but not limited to the structures shown below, where a dashed line indicates the attachment point of a linker moiety or a ULM, such as a CLM:
  • R 1 , R 2 are each independently H or a methyl group
  • the W 2 is covalently coupled to one or more ULM or CLM groups, or a linker to which is attached one or more ULM or CLM groups as described herein.
  • W 1 is selected from the group consisting of:
  • W2 is selected from the group consisting of:
  • the ABM comprises a structure shown below, where a dashed line indicates the attachment point of a linker moiety or a ULM or a CLM:
  • the W 2 is covalently coupled to one or more ULM or CLM groups, or a linker to which is attached one or more ULM or CLM groups as described herein.
  • W 1 is selected from the group consisting of:
  • W 2 is selected from the group consisting of:
  • the androgen receptor binding compound of ABM is selected from the group consisting of:
  • the description provides, but is not limited to, the following exemplary androgen receptor PROTAC molecules (PROTAC 3 through PROTAC-30), including salts, prodrugs, polymorphs, analogs, derivatives, and deuterated forms thereof:
  • the PTM may be represented by the Formula PTM-I:
  • the PTM may be represented by the Formula PTM-I:
  • PTM-I has at least one of: two R PTM2 , two R PTM3 , or a combination thereof.
  • the PTM may be represented by the Formula PTM-II:
  • O(CO)R PTM functions as a prodrug of the corresponding phenol in Formula PTM-I or PTM-II.
  • the O-lower alkyl of PTM-I or PTM-II an alkyl chain with carbon number 1 to 3.
  • the present disclosure provides a compound or PTM of Formula (I PTM ):
  • the PTM is represented by the Formula (II PTM ):
  • Thyroid Hormone Receptor Ligand (derivatized)
  • VIV Compound Targeting Tau Protein
  • the PTM may include a Tau protein binding moieties.
  • the PTM may be represented by Formula I, Formula II, Formula III, Formula IV, Formula V, Formula VI, Formula, VII, Formula, VIII, Formula IX, Formula X, or Formula XI:
  • aryl and heteroaryl rings of A, B, C, D, E, and F of PTM are optionally substituted with 1-3 substituents each independently selected from alkyl, alkenyl, haloalkyl, halogen, hydroxyl, alkoxy, fluoroalkoxy, amino, alkylamino, dialkylamino, acylamino, trifluoromethyl, and cyano, wherein the said alkyl and alkenyl groups are further optionally substituted.
  • the rings of at least one of A, B, C, F, or a combination thereof is selected from optionally substituted 5- or 6-membered aryl or heteroaryl rings;
  • the PTM has the chemical structure of Formula I, wherein:
  • the PTM has the chemical structure of Formula I, wherein:
  • the PTM has the chemical structure of Formula III or IV, wherein A, B and C are 5- or 6-membered fused aryl or heteroaryl rings, L PTM is selected from a bond or an alkyl, and D and E are 5- or 6-membered fused aryl or heteroaryl rings, wherein A, B, C, D and E are optionally substituted with alkyl, haloalkyl, halogen, hydroxyl, alkoxy, amino, alkylamino, dialkylamino or cyano.
  • the PTM is represented by following chemical structure:
  • the PTM is covalently coupled to one or more ULM (VLM or CLM) groups, or a linker to which is attached one or more ULM (VLM or CLM) groups as described herein.
  • PTM is represented by chemical structure:
  • PTM is represented by chemical
  • linker attachment point to PTM is as indicated by the dotted line:
  • compositions comprising combinations of an effective amount of at least one bifunctional compound as described herein, and one or more of the compounds otherwise described herein, all in effective amounts, in combination with a pharmaceutically effective amount of a carrier, additive or excipient, represents a further aspect of the present disclosure.
  • the present disclosure includes, where applicable, the compositions comprising the pharmaceutically acceptable salts, in particular, acid or base addition salts of compounds as described herein.
  • the acids which are used to prepare the pharmaceutically acceptable acid addition salts of the aforementioned base compounds useful according to this aspect are those which form non-toxic acid addition salts, i.e., salts containing pharmacologically acceptable anions, such as the hydrochloride, hydrobromide, hydroiodide, nitrate, sulfate, bisulfate, phosphate, acid phosphate, acetate, lactate, citrate, acid citrate, tartrate, bitartrate, succinate, maleate, fumarate, gluconate, saccharate, benzoate, methanesulfonate, ethanesulfonate, benzenesulfonate, p-toluenesulfonate and pamoate [i.e., 1,1′-methylene-bis-(2-hydroxy-3 naphtho
  • Pharmaceutically acceptable base addition salts may also be used to produce pharmaceutically acceptable salt forms of the compounds or derivatives according to the present disclosure.
  • the chemical bases that may be used as reagents to prepare pharmaceutically acceptable base salts of the present compounds that are acidic in nature are those that form non-toxic base salts with such compounds.
  • Such non-toxic base salts include, but are not limited to those derived from such pharmacologically acceptable cations such as alkali metal cations (eg., potassium and sodium) and alkaline earth metal cations (eg, calcium, zinc and magnesium), ammonium or water-soluble amine addition salts such as N-methylglucamine-(meglumine), and the lower alkanolammonium and other base salts of pharmaceutically acceptable organic amines, among others.
  • the compounds as described herein may, in accordance with the disclosure, be administered in single or divided doses by the oral, parenteral or topical routes.
  • Administration of the active compound may range from continuous (intravenous drip) to several oral administrations per day (for example, Q.I.D.) and may include oral, topical, parenteral, intramuscular, intravenous, sub-cutaneous, transdermal (which may include a penetration enhancement agent), buccal, sublingual and suppository administration, among other routes of administration.
  • Enteric coated oral tablets may also be used to enhance bioavailability of the compounds from an oral route of administration. The most effective dosage form will depend upon the pharmacokinetics of the particular agent chosen as well as the severity of disease in the patient.
  • compositions comprising an effective amount of compound as described herein, optionally in combination with a pharmaceutically acceptable carrier, additive or excipient.
  • Compounds according to the present disclosure ion may be administered in immediate release, intermediate release or sustained or controlled release forms. Sustained or controlled release forms are preferably administered orally, but also in suppository and transdermal or other topical forms. Intramuscular injections in liposomal form may also be used to control or sustain the release of compound at an injection site.
  • compositions as described herein may be formulated in a conventional manner using one or more pharmaceutically acceptable carriers and may also be administered in controlled-release formulations.
  • Pharmaceutically acceptable carriers that may be used in these pharmaceutical compositions include, but are not limited to, ion exchangers, alumina, aluminum stearate, lecithin, serum proteins, such as human serum albumin, buffer substances such as phosphates, glycine, sorbic acid, potassium sorbate, partial glyceride mixtures of saturated vegetable fatty acids, water, salts or electrolytes, such as prolamine sulfate, disodium hydrogen phosphate, potassium hydrogen phosphate, sodium chloride, zinc salts, colloidal silica, magnesium trisilicate, polyvinyl pyrrolidone, cellulose-based substances, polyethylene glycol, sodium carboxymethylcellulose, polyacrylates, waxes, polyethylene-polyoxypropylene-block polymers, polyethylene glycol and wool fat.
  • compositions as described herein may be administered orally, parenterally, by inhalation spray, topically, rectally, nasally, buccally, vaginally or via an implanted reservoir.
  • parenteral as used herein includes subcutaneous, intravenous, intramuscular, intra-articular, intra-synovial, intrasternal, intrathecal, intrahepatic, intralesional and intracranial injection or infusion techniques.
  • the compositions are administered orally, intraperitoneally or intravenously.
  • Sterile injectable forms of the compositions as described herein may be aqueous or oleaginous suspension. These suspensions may be formulated according to techniques known in the art using suitable dispersing or wetting agents and suspending agents.
  • the sterile injectable preparation may also be a sterile injectable solution or suspension in a non-toxic parenterally-acceptable diluent or solvent, for example as a solution in 1, 3-butanediol.
  • the acceptable vehicles and solvents that may be employed are water, Ringer's solution and isotonic sodium chloride solution.
  • sterile, fixed oils are conventionally employed as a solvent or suspending medium. For this purpose, any bland fixed oil may be employed including synthetic mono- or di-glycerides.
  • Fatty acids such as oleic acid and its glyceride derivatives are useful in the preparation of injectables, as are natural pharmaceutically-acceptable oils, such as olive oil or castor oil, especially in their polyoxyethylated versions.
  • oils such as olive oil or castor oil, especially in their polyoxyethylated versions.
  • These oil solutions or suspensions may also contain a long-chain alcohol diluent or dispersant, such as Ph. Helv or similar alcohol.
  • compositions as described herein may be orally administered in any orally acceptable dosage form including, but not limited to, capsules, tablets, aqueous suspensions or solutions.
  • carriers which are commonly used include lactose and corn starch.
  • Lubricating agents such as magnesium stearate, are also typically added.
  • useful diluents include lactose and dried corn starch.
  • aqueous suspensions are required for oral use, the active ingredient is combined with emulsifying and suspending agents. If desired, certain sweetening, flavoring or coloring agents may also be added.
  • compositions as described herein may be administered in the form of suppositories for rectal administration.
  • suppositories for rectal administration.
  • a suitable non-irritating excipient which is solid at room temperature but liquid at rectal temperature and therefore will melt in the rectum to release the drug.
  • suitable non-irritating excipient include cocoa butter, beeswax and polyethylene glycols.
  • compositions as described herein may also be administered topically. Suitable topical formulations are readily prepared for each of these areas or organs. Topical application for the lower intestinal tract can be effected in a rectal suppository formulation (see above) or in a suitable enema formulation. Topically-acceptable transdermal patches may also be used.
  • the pharmaceutical compositions may be formulated in a suitable ointment containing the active component suspended or dissolved in one or more carriers.
  • Carriers for topical administration of the compounds of this invention include, but are not limited to, mineral oil, liquid petrolatum, white petrolatum, propylene glycol, polyoxyethylene, polyoxypropylene compound, emulsifying wax and water.
  • the compounds may be coated onto a stent which is to be surgically implanted into a patient in order to inhibit or reduce the likelihood of occlusion occurring in the stent in the patient.
  • the pharmaceutical compositions can be formulated in a suitable lotion or cream containing the active components suspended or dissolved in one or more pharmaceutically acceptable carriers.
  • suitable carriers include, but are not limited to, mineral oil, sorbitan monostearate, polysorbate 60, cetyl esters wax, cetearyl alcohol, 2-octyldodecanol, benzyl alcohol and water.
  • the pharmaceutical compositions may be formulated as micronized suspensions in isotonic, pH adjusted sterile saline, or, preferably, as solutions in isotonic, pH adjusted sterile saline, either with our without a preservative such as benzylalkonium chloride.
  • the pharmaceutical compositions may be formulated in an ointment such as petrolatum.
  • compositions as described herein may also be administered by nasal aerosol or inhalation.
  • Such compositions are prepared according to techniques well-known in the art of pharmaceutical formulation and may be prepared as solutions in saline, employing benzyl alcohol or other suitable preservatives, absorption promoters to enhance bioavailability, fluorocarbons, and/or other conventional solubilizing or dispersing agents.
  • compositions should be formulated to contain between about 0.05 milligram to about 750 milligrams or more, more preferably about 1 milligram to about 600 milligrams, and even more preferably about 10 milligrams to about 500 milligrams of active ingredient, alone or in combination with at least one other compound according to the present disclosure.
  • a specific dosage and treatment regimen for any particular patient will depend upon a variety of factors, including the activity of the specific compound employed, the age, body weight, general health, sex, diet, time of administration, rate of excretion, drug combination, and the judgment of the treating physician and the severity of the particular disease or condition being treated.
  • a patient or subject in need of therapy using compounds according to the methods described herein can be treated by administering to the patient (subject) an effective amount of the compound according to the present disclosure including pharmaceutically acceptable salts, solvates or polymorphs, thereof optionally in a pharmaceutically acceptable carrier or diluent, either alone, or in combination with other known erythopoiesis stimulating agents as otherwise identified herein.
  • These compounds can be administered by any appropriate route, for example, orally, parenterally, intravenously, intradermally, subcutaneously, or topically, including transdermally, in liquid, cream, gel, or solid form, or by aerosol form.
  • the active compound is included in the pharmaceutically acceptable carrier or diluent in an amount sufficient to deliver to a patient a therapeutically effective amount for the desired indication, without causing serious toxic effects in the patient treated.
  • a preferred dose of the active compound for all of the herein-mentioned conditions is in the range from about 10 ng/kg to 300 mg/kg, preferably 0.1 to 100 mg/kg per day, more generally 0.5 to about 25 mg per kilogram body weight of the recipient/patient per day.
  • a typical topical dosage will range from 0.01-5% wt/wt in a suitable carrier.
  • the compound is conveniently administered in any suitable unit dosage form, including but not limited to one containing less than 1 mg, 1 mg to 3000 mg, preferably 5 to 500 mg of active ingredient per unit dosage form.
  • An oral dosage of about 25-250 mg is often convenient.
  • the active ingredient is preferably administered to achieve peak plasma concentrations of the active compound of about 0.00001-30 mM, preferably about 0.1-30 ⁇ M. This may be achieved, for example, by the intravenous injection of a solution or formulation of the active ingredient, optionally in saline, or an aqueous medium or administered as a bolus of the active ingredient. Oral administration is also appropriate to generate effective plasma concentrations of active agent.
  • the concentration of active compound in the drug composition will depend on absorption, distribution, inactivation, and excretion rates of the drug as well as other factors known to those of skill in the art. It is to be noted that dosage values will also vary with the severity of the condition to be alleviated. It is to be further understood that for any particular subject, specific dosage regimens should be adjusted over time according to the individual need and the professional judgment of the person administering or supervising the administration of the compositions, and that the concentration ranges set forth herein are exemplary only and are not intended to limit the scope or practice of the claimed composition.
  • the active ingredient may be administered at once, or may be divided into a number of smaller doses to be administered at varying intervals of time.
  • Oral compositions will generally include an inert diluent or an edible carrier. They may be enclosed in gelatin capsules or compressed into tablets. For the purpose of oral therapeutic administration, the active compound or its prodrug derivative can be incorporated with excipients and used in the form of tablets, troches, or capsules. Pharmaceutically compatible binding agents, and/or adjuvant materials can be included as part of the composition.
  • the tablets, pills, capsules, troches and the like can contain any of the following ingredients, or compounds of a similar nature: a binder such as microcrystalline cellulose, gum tragacanth or gelatin; an excipient such as starch or lactose, a dispersing agent such as alginic acid, Primogel, or corn starch; a lubricant such as magnesium stearate or Sterotes; a glidant such as colloidal silicon dioxide; a sweetening agent such as sucrose or saccharin; or a flavoring agent such as peppermint, methyl salicylate, or orange flavoring.
  • a binder such as microcrystalline cellulose, gum tragacanth or gelatin
  • an excipient such as starch or lactose, a dispersing agent such as alginic acid, Primogel, or corn starch
  • a lubricant such as magnesium stearate or Sterotes
  • a glidant such as colloidal silicon dioxide
  • the active compound or pharmaceutically acceptable salt thereof can be administered as a component of an elixir, suspension, syrup, wafer, chewing gum or the like.
  • a syrup may contain, in addition to the active compounds, sucrose as a sweetening agent and certain preservatives, dyes and colorings and flavors.
  • the active compound or pharmaceutically acceptable salts thereof can also be mixed with other active materials that do not impair the desired action, or with materials that supplement the desired action, such as erythropoietin stimulating agents, including EPO and darbapoietin alfa, among others.
  • erythropoietin stimulating agents including EPO and darbapoietin alfa
  • one or more compounds according to the present disclosure are coadministered with another bioactive agent, such as an erythropoietin stimulating agent or a would healing agent, including an antibiotic, as otherwise described herein.
  • Solutions or suspensions used for parenteral, intradermal, subcutaneous, or topical application can include the following components: a sterile diluent such as water for injection, saline solution, fixed oils, polyethylene glycols, glycerine, propylene glycol or other synthetic solvents; antibacterial agents such as benzyl alcohol or methyl parabens; antioxidants such as ascorbic acid or sodium bisulfite; chelating agents such as ethylenediaminetetraacetic acid; buffers such as acetates, citrates or phosphates and agents for the adjustment of tonicity such as sodium chloride or dextrose.
  • the parental preparation can be enclosed in ampoules, disposable syringes or multiple dose vials made of glass or plastic.
  • preferred carriers are physiological saline or phosphate buffered saline (PBS).
  • the active compounds are prepared with carriers that will protect the compound against rapid elimination from the body, such as a controlled release formulation, including implants and microencapsulated delivery systems.
  • a controlled release formulation including implants and microencapsulated delivery systems.
  • Biodegradable, biocompatible polymers can be used, such as ethylene vinyl acetate, polyanhydrides, polyglycolic acid, collagen, polyorthoesters, and polylactic acid. Methods for preparation of such formulations will be apparent to those skilled in the art.
  • Liposomal suspensions may also be pharmaceutically acceptable carriers. These may be prepared according to methods known to those skilled in the art, for example, as described in U.S. Pat. No. 4,522,811 (which is incorporated herein by reference in its entirety).
  • liposome formulations may be prepared by dissolving appropriate lipid(s) (such as stearoyl phosphatidyl ethanolamine, stearoyl phosphatidyl choline, arachadoyl phosphatidyl choline, and cholesterol) in an inorganic solvent that is then evaporated, leaving behind a thin film of dried lipid on the surface of the container. An aqueous solution of the active compound are then introduced into the container. The container is then swirled by hand to free lipid material from the sides of the container and to disperse lipid aggregates, thereby forming the liposomal suspension.
  • appropriate lipid(s) such as stearoyl phosphatidyl ethanolamine, stearoyl phosphat
  • the description provides therapeutic compositions comprising an effective amount of a compound as described herein or salt form thereof, and a pharmaceutically acceptable carrier.
  • the therapeutic compositions modulate protein degradation in a patient or subject, for example, an animal such as a human, and can be used for treating or ameliorating disease states or conditions which are modulated through the degraded protein.
  • treat refers to any action providing a benefit to a patient for which the present compounds may be administered, including the treatment of any disease state or condition which is modulated through the protein to which the present compounds bind.
  • Disease states or conditions, including cancer, which may be treated using compounds according to the present disclosure are set forth hereinabove.
  • the description provides therapeutic compositions as described herein for effectuating the degradation of proteins of interest for the treatment or amelioration of a disease, e.g., cancer.
  • a disease e.g., cancer.
  • the disease is multiple myeloma.
  • the description provides a method of ubiquitinating/degrading a target protein in a cell.
  • the method comprises administering a bifunctional compound as described herein comprising, e.g., a CLM and a PTM, preferably linked through a linker moiety, as otherwise described herein, wherein the CLM is coupled to the PTM and wherein the CLM recognizes a ubiquitin pathway protein (e.g., an ubiquitin ligase, preferably an E3 ubiquitin ligase such as, e.g., cereblon) and the PTM recognizes the target protein such that degradation of the target protein will occur when the target protein is placed in proximity to the ubiquitin ligase, thus resulting in degradation/inhibition of the effects of the target protein and the control of protein levels.
  • a ubiquitin pathway protein e.g., an ubiquitin ligase, preferably an E3 ubiquitin ligase such as, e.g., cereblon
  • the PTM recognizes the target protein such that degradation of the target protein will occur when the target protein is
  • control of protein levels afforded by the present disclosure provides treatment of a disease state or condition, which is modulated through the target protein by lowering the level of that protein in the cell, e.g., cell of a patient.
  • the method comprises administering an effective amount of a compound as described herein, optionally including a pharamaceutically acceptable excipient, carrier, adjuvant, another bioactive agent or combination thereof.
  • the description provides methods for treating or emeliorating a disease, disorder or symptom thereof in a subject or a patient, e.g., an animal such as a human, comprising administering to a subject in need thereof a composition comprising an effective amount, e.g., a therapeutically effective amount, of a compound as described herein or salt form thereof, and a pharmaceutically acceptable excipient, carrier, adjuvant, another bioactive agent or combination thereof, wherein the composition is effective for treating or ameliorating the disease or disorder or symptom thereof in the subject.
  • a composition comprising an effective amount, e.g., a therapeutically effective amount, of a compound as described herein or salt form thereof, and a pharmaceutically acceptable excipient, carrier, adjuvant, another bioactive agent or combination thereof, wherein the composition is effective for treating or ameliorating the disease or disorder or symptom thereof in the subject.
  • the description provides methods for identifying the effects of the degradation of proteins of interest in a biological system using compounds according to the present disclosure.
  • the present disclosure is directed to a method of treating a human patient in need for a disease state or condition modulated through a protein where the degradation of that protein will produce a therapeutic effect in that patient, the method comprising administering to a patient in need an effective amount of a compound according to the present disclosure, optionally in combination with another bioactive agent.
  • the disease state or condition may be a disease caused by a microbial agent or other exogenous agent such as a virus, bacteria, fungus, protozoa or other microbe or may be a disease state, which is caused by overexpression of a protein, which leads to a disease state and/or condition
  • disease state or condition is used to describe any disease state or condition wherein protein dysregulation (i.e., the amount of protein expressed in a patient is elevated) occurs and where degradation of one or more proteins in a patient may provide beneficial therapy or relief of symptoms to a patient in need thereof. In certain instances, the disease state or condition may be cured.
  • Disease states of conditions which may be treated using compounds according to the present disclosure include, for example, asthma, autoimmune diseases such as multiple sclerosis, various cancers, ciliopathies, cleft palate, diabetes, heart disease, hypertension, inflammatory bowel disease, mental retardation, mood disorder, obesity, refractive error, infertility, Angelman syndrome, Canavan disease, Coeliac disease, Charcot-Marie-Tooth disease, Cystic fibrosis, Duchenne muscular dystrophy, Haemochromatosis, Haemophilia, Klinefelter's syndrome, Neurofibromatosis, Phenylketonuria, Polycystic kidney disease, (PKD1) or 4 (PKD2) Prader-Willi syndrome, Sickle-cell disease, Tay-Sachs disease, Turner syndrome.
  • autoimmune diseases such as multiple sclerosis, various cancers, ciliopathies, cleft palate, diabetes, heart disease, hypertension, inflammatory bowel disease, mental retardation, mood disorder, obesity, refractive error
  • Further disease states or conditions which may be treated by compounds according to the present disclosure include Alzheimer's disease, Amyotrophic lateral sclerosis (Lou Gehrig's disease), Anorexia nervosa, Anxiety disorder, Atherosclerosis, Attention deficit hyperactivity disorder, Autism, Bipolar disorder, Chronic fatigue syndrome, Chronic obstructive pulmonary disease, Crohn's disease, Coronary heart disease, Dementia, Depression, Diabetes mellitus type 1, Diabetes mellitus type 2, Epilepsy, Guillain-Barré syndrome, Irritable bowel syndrome, Lupus, Metabolic syndrome, Multiple sclerosis, Myocardial infarction, Obesity, Obsessive-compulsive disorder, Panic disorder, Parkinson's disease, Psoriasis, Rheumatoid arthritis, Sarcoidosis, Schizophrenia, Stroke, Thromboangiitis obliterans, Tourette syndrome, Vasculitis.
  • Alzheimer's disease Amyotrophic lateral sclerosis
  • Still additional disease states or conditions which can be treated by compounds according to the present disclosure include aceruloplasminemia, Achondrogenesis type II, achondroplasia, Acrocephaly, Gaucher disease type 2, acute intermittent porphyria, Canavan disease, Adenomatous Polyposis Coli, ALA dehydratase deficiency, adenylosuccinate lyase deficiency, Adrenogenital syndrome, Adrenoleukodystrophy, ALA-D porphyria, ALA dehydratase deficiency, Alkaptonuria, Alexander disease, Alkaptonuric ochronosis, alpha 1-antitrypsin deficiency, alpha-1 proteinase inhibitor, emphysema, amyotrophic lateral sclerosis Alström syndrome, Alexander disease, Amelogenesis imperfecta, ALA dehydratase deficiency, Anderson-Fabry disease, androgen insensitivity syndrome, Anemia Angiokeratoma Corporis Diff
  • neoplasia or “cancer” is used throughout the specification to refer to the pathological process that results in the formation and growth of a cancerous or malignant neoplasm, i.e., abnormal tissue that grows by cellular proliferation, often more rapidly than normal and continues to grow after the stimuli that initiated the new growth cease.
  • malignant neoplasms show partial or complete lack of structural organization and functional coordination with the normal tissue and most invade surrounding tissues, metastasize to several sites, and are likely to recur after attempted removal and to cause the death of the patient unless adequately treated.
  • neoplasia is used to describe all cancerous disease states and embraces or encompasses the pathological process associated with malignant hematogenous, ascitic and solid tumors.
  • Exemplary cancers which may be treated by the present compounds either alone or in combination with at least one additional anti-cancer agent include squamous-cell carcinoma, basal cell carcinoma, adenocarcinoma, hepatocellular carcinomas, and renal cell carcinomas, cancer of the bladder, bowel, breast, cervix, colon, esophagus, head, kidney, liver, lung, neck, ovary, pancreas, prostate, and stomach; leukemias; benign and malignant lymphomas, particularly Burkitt's lymphoma and Non-Hodgkin's lymphoma; benign and malignant melanomas; myeloproliferative diseases; sarcomas, including Ewing's sarcoma, hemangiosarcoma, Kaposi's sar
  • Additional cancers which may be treated using compounds according to the present disclosure include, for example, T-lineage Acute lymphoblastic Leukemia (T-ALL), T-lineage lymphoblastic Lymphoma (T-LL), Peripheral T-cell lymphoma, Adult T-cell Leukemia, Pre-B ALL, Pre-B Lymphomas, Large B-cell Lymphoma, Burkitts Lymphoma, B-cell ALL, Philadelphia chromosome positive ALL and Philadelphia chromosome positive CML.
  • T-ALL T-lineage Acute lymphoblastic Leukemia
  • T-LL T-lineage lymphoblastic Lymphoma
  • Peripheral T-cell lymphoma Peripheral T-cell lymphoma
  • Adult T-cell Leukemia Pre-B ALL
  • Pre-B Lymphomas Large B-cell Lymphoma
  • Burkitts Lymphoma B-cell ALL
  • Philadelphia chromosome positive ALL Philadelphia chromosome positive CML.
  • bioactive agent is used to describe an agent, other than a compound according to the present disclosure, which is used in combination with the present compounds as an agent with biological activity to assist in effecting an intended therapy, inhibition and/or prevention/prophylaxis for which the present compounds are used.
  • Preferred bioactive agents for use herein include those agents which have pharmacological activity similar to that for which the present compounds are used or administered and include for example, anti-cancer agents, antiviral agents, especially including anti-HIV agents and anti-HCV agents, antimicrobial agents, antifungal agents, etc.
  • additional anti-cancer agent is used to describe an anti-cancer agent, which may be combined with compounds according to the present disclosure to treat cancer.
  • these agents include, for example, everolimus, trabectedin, abraxane, TLK 286, AV-299, DN-101, pazopanib, GSK690693, RTA 744, ON 0910.Na, AZD 6244 (ARRY-142886), AMN-107, TKI-258, GSK461364, AZD 1152, enzastaurin, vandetanib, ARQ-197, MK-0457, MLN8054, PHA-739358, R-763, AT-9263, a FLT-3 inhibitor, a VEGFR inhibitor, an EGFR TK inhibitor, an aurora kinase inhibitor, a PIK-1 modulator, a Bcl-2 inhibitor, an HDAC inhibitor, a c-MET inhibitor, a PARP inhibitor, a Cdk inhibitor, an EG
  • anti-HIV agent or “additional anti-HIV agent” includes, for example, nucleoside reverse transcriptase inhibitors (NRTI), other non-nucleoside reverse transcriptase inhibitors (i.e., those which are not representative of the present disclosure), protease inhibitors, fusion inhibitors, among others, exemplary compounds of which may include, for example, 3TC (Lamivudine), AZT (Zidovudine), ( ⁇ )-FTC, ddI (Didanosine), ddC (zalcitabine), abacavir (ABC), tenofovir (PMPA), D-D4FC (Reverset), D4T (Stavudine), Racivir, L-FddC, L-FD4C, NVP (Nevirapine), DLV (Delavirdine), EFV (Efavirenz), SQVM (Saquinavir mesylate), RTV (Ritonavir
  • NNRTI's i.e., other than the NNRTI's according to the present disclosure
  • NNRTI's may be selected from the group consisting of nevirapine (BI-R6-587), delavirdine (U-901525/T), efavirenz (DMP-266), UC-781 (N-[4-chloro-3-(3-methyl-2-butenyloxy)phenyl]-2methyl3-furancarbothiamide), etravirine (TMC125), Trovirdine (Ly300046.HCl), MKC-442 (emivirine, coactinon), HI-236, HI-240, HI-280, HI-281, rilpivirine (TMC-278), MSC-127, HBY 097, DMP266, Baicalin (TJN-151) ADAM-II (Methyl 3′,3′-dichloro
  • pharmaceutically acceptable salt is used throughout the specification to describe, where applicable, a salt form of one or more of the compounds described herein which are presented to increase the solubility of the compound in the gastic juices of the patient's gastrointestinal tract in order to promote dissolution and the bioavailability of the compounds.
  • Pharmaceutically acceptable salts include those derived from pharmaceutically acceptable inorganic or organic bases and acids, where applicable. Suitable salts include those derived from alkali metals such as potassium and sodium, alkaline earth metals such as calcium, magnesium and ammonium salts, among numerous other acids and bases well known in the pharmaceutical art. Sodium and potassium salts are particularly preferred as neutralization salts of the phosphates according to the present disclosure.
  • pharmaceutically acceptable derivative is used throughout the specification to describe any pharmaceutically acceptable prodrug form (such as an ester, amide other prodrug group), which, upon administration to a patient, provides directly or indirectly the present compound or an active metabolite of the present compound.
  • the synthetic realization and optimization of the bifunctional molecules as described herein may be approached in a step-wise or modular fashion.
  • identification of compounds that bind to the target molecules can involve high or medium throughput screening campaigns if no suitable ligands are immediately available. It is not unusual for initial ligands to require iterative design and optimization cycles to improve suboptimal aspects as identified by data from suitable in vitro and pharmacological and/or ADMET assays. Part of the optimization/SAR campaign would be to probe positions of the ligand that are tolerant of substitution and that might be suitable places on which to attach the linker chemistry previously referred to herein. Where crystallographic or NMR structural data are available, these can be used to focus such a synthetic effort.
  • PTMs and ULMs e.g. CLMs
  • Linker moieties can be synthesized with a range of compositions, lengths and flexibility and functionalized such that the PTM and ULM groups can be attached sequentially to distal ends of the linker.
  • a library of bifunctional molecules can be realized and profiled in in vitro and in vivo pharmacological and ADMET/PK studies.
  • the final bifunctional molecules can be subject to iterative design and optimization cycles in order to identify molecules with desirable properties.
  • Exemplary compounds described in this application can be synthesized by connecting the right hand key fragment prepared according to Schemes 2-30, 2-31, 2-40, 2-41, 2-45, and 2-46.
  • the detailed preparation of representative compounds claimed in this application are further described in Schemes 3-10, 3-56, 3-58, and 3-72.
  • Synthetic schemes 2-30, 2-31, 2-40, 2-41, 2-45, and 2-46 describe the routes used in the preparation of CRBN ligands, as well as CRBN ligands with partial linker moieties connected.
  • Synthetic schemes 3-10, 3-56, 3-58, and 3-72 describe the routes used in the preparation of representative chimeric compounds claimed in this application.
  • 6-Chloronicotinic acid (1.6 g, 10.0 mmol) was dissolved in N,N-dimethylacetamide (15 mL), and tert-butyl piperazine-1-carboxylate (1.9 g, 10.0 mmol) and ethyldiisopropylamine (2.6 g, 20 mmol) were added thereto, followed by stirring at 130° C. overnight.
  • the reaction mixture was concentrated under reduced pressure, and to the obtained residue was added a 1 M aqueous NaOH solution (10 mL), followed by washing with CHCl 3 (50 mL).
  • the pH of the aqueous layer was adjusted to around 6 to 7 by the addition of 1 M hydrochloric acid, followed by extraction with CHCl 3 (50 mL ⁇ 3).
  • the organic layer was dried over anhydrous sodium sulfate and the solvent was concentrated under reduced pressure.
  • Step 2 Synthesis of tert-butyl 4-(5-((1r,3r)-3-(3-chloro-4-cyanophenoxy)-2,2,4,4-tetramethylcyclobutylcarbamoyl)pyridin-2-yl)piperazine-1-carboxylate
  • Step 3 Synthesis of N-((1r,3r)-3-(3-chloro-4-cyanophenoxy)-2,2,4,4-tetramethylcyclobutyl)-6-(piperazin-1-yl)nicotinamide hydrochloride
  • Step 4 Synthesis of 4,5-dichloro-2-(4-methoxybenzyl)pyridazin-3(2H)-one
  • Step 5 Synthesis of 5-(6-(benzyloxy)hexyloxy)-4-chloro-2-(4-methoxybenzyl)pyridazin-3(2H)-one
  • Step 7 Synthesis of 3-(4-(6-(benzyloxy)hexyloxy)-5-chloro-6-oxopyridazin-1(6H)-yl)piperidine-2,6-dione
  • Step 8 Synthesis of 3-(4-(6-hydroxyhexyloxy)-6-oxopyridazin-1(6H)-yl)piperidine-2,6-dione
  • Step 9 Synthesis of 6-(1-(2,6-dioxopiperidin-3-yl)-6-oxo-1,6-dihydropyridazin-4-yloxy)hexanal
  • Step 10 Synthesis of N-((1r,3r)-3-(3-chloro-4-cyanophenoxy)-2,2,4,4-tetramethylcyclobutyl)-6-(4-(6-(1-(2,6-dioxopiperidin-3-yl)-6-oxo-1,6-dihydropyridazin-4-yloxy)hexyl)piperazin-1-yl)nicotinamide
  • Step 2 Synthesis of 3-(8-(5-chloropentyloxy)-2-methyl-4-oxoquinazolin-3(4H)-yl)piperidine-2,6-dione
  • Step 3 Synthesis of N-((1r,3r)-3-(3-chloro-4-cyanophenoxy)-2,2,4,4-tetramethylcyclobutyl)-6-(4-(5-(3-(2,6-dioxopiperidin-3-yl)-2-methyl-4-oxo-3,4-dihydroquinazolin-8-yloxy)pentyl)piperazin-1-yl)nicotinamide
  • Step 2 Synthesis of 5-((1,1-dioxido-3-oxo-2,3-dihydrobenzo[d]isothiazol-6-yl)oxy)pentyl methanesulfonate
  • Step 3 Synthesis of N-((1r,3r)-3-(3-chloro-4-cyanophenoxy)-2,2,4,4-tetramethylcyclobutyl)-6-(4-(5-((1,1-dioxido-3-oxo-2,3-dihydrobenzo[d]isothiazol-6-yl)oxy)pentyl)piperazin-1-yl)nicotinamide
  • Step 4 Synthesis of N-((1r,3r)-3-(3-chloro-4-cyanophenoxy)-2,2,4,4-tetramethylcyclobutyl)-6-(4-(5-((2-(2,6-dioxopiperidin-3-yl)-1,1-dioxido-3-oxo-2,3-dihydrobenzo[d]isothiazol-6-yl)oxy)pentyl)piperazin-1-yl)nicotinamide
  • Step 7 Synthesis of N-((1r,3r)-3-(3-chloro-4-cyanophenoxy)-2,2,4,4-tetramethylcyclobutyl)-6-(4-(2-((2-(2,4-difluorophenyl)-1-oxoisoindolin-4-yl)oxy)ethyl)piperazin-1-yl)nicotinamide
  • reaction mixture was partitioned between ethyl acetate (50 ml) and water (50 ml), the organic layer was washed with brine (50 ml ⁇ 2) and dried over anhydrous sodium sulfate and concentrated under reduced pressure to give a crude residue which was purified by silica gel flash column chromatography (eluted with 25-35% ethyl acetate in hexane) to afford 2-(2,4-difluorophenyl)-5-hydroxyisoindoline-1,3-dione (2.1 g, yield 70%) as yellow solid.
  • Step 2 Synthesis of 2-(2,4-difluorophenyl)-5-((5-hydroxypentyl)oxy)isoindoline-1,3-dione
  • reaction mixture was partitioned between ethyl acetate (30 ml) and water (30 ml), the organic layer was washed with brine (30 ml ⁇ 2) and dried over anhydrous sodium sulfate and concentrated under reduced pressure to give a crude residue which was purified by silica gel flash column chromatography (eluted with 40-50% ethyl acetate in hexane) to afford 2-(2,4-difluorophenyl)-5-((5-hydroxypentyl)oxy)isoindoline-1,3-dione (217 mg, yield 55%) as white solid.
  • Step 3 Synthesis of 5-((2-(2,4-difluorophenyl)-1,3-dioxoisoindolin-5-yl)oxy)pentyl 4-methylbenzenesulfonate
  • reaction mixture was diluted with dichloromethane (30 ml), washed with water (50 ml) then brine (50 ml), dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give a crude residue which was purified by silica gel flash chromatography (eluted with 30-50% ethyl acetate in hexane) to afford 5-((2-(2,4-difluorophenyl)-1,3-dioxoisoindolin-5-yl)oxy)pentyl 4-methylbenzenesulfonate (208 mg, yield 67%) as white solid.
  • Step 4 Synthesis of N-((1r,3r)-3-(3-chloro-4-cyanophenoxy)-2,2,4,4-tetramethylcyclobutyl)-6-(4-(5-((2-(2,4-difluorophenyl)-1,3-dioxoisoindolin-5-yl)oxy)pentyl)piperazin-1-yl)nicotinamide
  • Step 2 Synthesis of 5-(5-(5-chloropentyloxy)-1,3-dioxoisoindolin-2-yl)-6-methoxypicolinonitrile
  • Step 3 Synthesis of N-((1r,3r)-3-(3-chloro-4-cyanophenoxy)-2,2,4,4-tetramethylcyclobutyl)-6-(4-(5-(2-(6-cyano-2-methoxypyridin-3-yl)-1,3-dioxoisoindolin-5-yloxy)pentyl)piperazin-1-yl)nicotinamide
  • Step 4 Synthesis of 5-(5-(5-(4-(5-((1r,3r)-3-(3-chloro-4-cyanophenoxy)-2,2,4,4-tetramethylcyclobutylcarbamoyl)pyridin-2-yl)piperazin-1-yl)pentyloxy)-1,3-dioxoisoindolin-2-yl)-6-hydroxypicolinamide
  • Step 5 Synthesis of N-((1r,3r)-3-(3-chloro-4-cyanophenoxy)-2,2,4,4-tetramethylcyclobutyl)-6-(4-(5-(2-(6-cyano-2-hydroxypyridin-3-yl)-1,3-dioxoisoindolin-5-yloxy)pentyl)piperazin-1-yl)nicotinamide
  • Step 2 Synthesis of N-[3-(3-chloro-4-cyano-phenoxy)-2,2,4,4-tetramethyl-cyclobutyl]-4-[4-(hydroxymethyl)-1-piperidyl]benzamide
  • Step 3 Synthesis of N-[3-(3-chloro-4-cyano-phenoxy)-2,2,4,4-tetramethyl-cyclobutyl]-4-(4-formyl-1-piperidyl)benzamide
  • Step 5 Synthesis of tert-butyl 4-(2-(6-methoxypyridin-3-yl)-1,3-dioxoisoindolin-5-yl)piperazine-1-carboxylate
  • Step 6 Synthesis of 2-(6-oxo-1,6-dihydropyridin-3-yl)-5-(piperazin-1-yl)isoindoline-1,3-dione
  • Step 7 Synthesis of N-((1r,3r)-3-(3-chloro-4-cyanophenoxy)-2,2,4,4-tetramethylcyclobutyl)-4-(4-((4-(1,3-dioxo-2-(6-oxo-1,6-dihydropyridin-3-yl)isoindolin-5-yl)piperazin-1-yl)methyl)piperidin-1-yl)benzamide
  • the reaction mixture was allowed to stir at room temperature for 5 hours.
  • the reaction mixture was monitored by LCMS, which showed a peak with a mass consistent with the desired product and peaks with masses consistent with the starting materials.
  • the reaction mixture was allowed to stir at room temperature for an additional 16 hours.
  • LMCS showed a major peak with a mass consistent with the desired product.
  • the reaction mixture was quenched with aq. NaHCO3 (1 mL) and extracted with DCM (1 mL). The organic layer was dried over Na2SO4, filtered, and concentrated under reduced pressure.
  • the crude material was purified by silica gel chromatography on a Teledyne Combiflash ISCO eluting with DCM/MeOH (gradient 100:0 to 90:10).

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