WO2012173846A2 - Macrocycles peptidomimétiques - Google Patents

Macrocycles peptidomimétiques Download PDF

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Publication number
WO2012173846A2
WO2012173846A2 PCT/US2012/041181 US2012041181W WO2012173846A2 WO 2012173846 A2 WO2012173846 A2 WO 2012173846A2 US 2012041181 W US2012041181 W US 2012041181W WO 2012173846 A2 WO2012173846 A2 WO 2012173846A2
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WIPO (PCT)
Prior art keywords
peptidomimetic macrocycle
amino acid
independently
alkyl
macrocycle
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PCT/US2012/041181
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English (en)
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WO2012173846A3 (fr
Inventor
Huw M. Nash
Noriyuki Kawahata
Carl Elkin
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Aileron Therapeutics, Inc.
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Publication of WO2012173846A2 publication Critical patent/WO2012173846A2/fr
Publication of WO2012173846A3 publication Critical patent/WO2012173846A3/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K38/00—Medicinal preparations containing peptides
    • A61K38/04—Peptides having up to 20 amino acids in a fully defined sequence; Derivatives thereof
    • A61K38/12—Cyclic peptides, e.g. bacitracins; Polymyxins; Gramicidins S, C; Tyrocidins A, B or C
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change

Definitions

  • IAPs apoptosis proteins
  • the inhibitor of apoptosis proteins are an endogenous family of anti-apoptotic proteins that effectively suppress apoptosis induced by a variety of stimuli including death receptor activation, growth factor withdrawl, ionizing radiation, viral infection, and genotoxic damage.
  • the human genome encodes eight IAP family members including X-linked inhibitor of apoptosis (XIAP), cIAP !
  • cIAP 2 melanoma inhibitor of apoptosis
  • ML-IAP Livin; kidney inhibitor of apoptosis protein (K-IAP)
  • NLR family apoptosis inhibitory protein (Naip), IAP-like protein 2 (ILP2; Thrombospondin-bound integrin-associated protein (TS-IAP)), apollon/Bruce and survivin.
  • IAP-like protein 2 IAP-like protein 2
  • TS-IAP Thrombospondin-bound integrin-associated protein
  • survivin The mechanisms that link these proteins to apoptosis are diverse.
  • XIAP is the only human IAP that directly inhibits caspase activity, while other members may be linked to apoptosis by binding to proapoptotic molecules (such as second mitochondria-derived activator of caspase (Smac)/Diablo, which is an IAP antagonist) or use cofactors to prevent caspase-9 activation.
  • proapoptotic molecules such as second mitochondria-derived activator of caspase (Smac)/Diablo, which is an IAP antagonist
  • Smac second mitochondria-derived activator of caspase
  • Diablo which is an IAP antagonist
  • cofactors to prevent caspase-9 activation.
  • Survivin is the smallest IAP with 142 amino acid residues and a molecular mass of 16.5 kDa. It is composed of a single baculovirus IAP repeat (BIR) domain and an extended COOH-terminal a-helical coiled-coil domain but lacks the RING-finger domain found in other IAPs.
  • BIR baculovirus
  • survivin is involved in other essential functions including cell division, cellular stress response and surveillance checkpoints.
  • survivin' s functions act to preserve genome fidelity and to regulate microtubule dynamics.
  • survivin expression in normal tissues is developmentally regulated and the protein has been found to be absent or present at low levels in most terminally differentiated tissues. Since survivin expression is also driven by signaling pathways known to be activated in cancer (Wnt/ -catenin and pleiotropic signaling mechanisms such as Akt), survivin is overexpressed in a large majority of human tumors.
  • Wnt/ -catenin and pleiotropic signaling mechanisms such as Akt
  • the recurrent rate in survivin-positive HCC is also significantly higher than that in survivin-negative HCC after hepatectomy. Accordingly the 1 - and 3 -year survival rate in patients with survivin-positive tumors was significantly lower than that in patients with survivin-negative tumors (58.62 and 10.34%) vs 76.92 and 30.77%).
  • survivin expression correlates with poor prognostic parameters (high nuclear and histological grade, microvascular invasion, increased proliferation (mitotic count, MIB-1)), local recurrence, and shorter disease-free survival.
  • HCC cell types exhibit a major resistance to (TRAIL) -induced cell death.
  • survivin was the major transcript, and all transcripts were present in all normal and neoplastic tissues. Near 55% of HCCs showed two fold or greater overexpression of survivin. Although all three survivin transcripts are present in normal liver, survivin is the dominant transcript in HCC liver and is over expressed in 55% of cases. Thus, survivin has been considered as a target for anti-cancer therapy with the dual aim of inhibiting tumor growth potential and enhancing tumor cell response to apoptosis-inducing anticancer agents. Cancers of particular relevance for a survin-targeted therapy include liver, breast, lung, pancreatic, prostate and colon.
  • CPC chromosomal passenger complex
  • ICENP inner centromere protein
  • Aurora B kinase a protein complex of survivin, borealin, inner centromere protein (INCENP) and Aurora B kinase. All four members of this protein complex are obligate to the functional CPC, and thus disruption of the assembly of this four protein survivin-borealin-INCENP -Aurora B complex is a reasonable strategy to develop a novel anti-proliferative therapeutics for cancers and other diseases.
  • Recent structural studies (Bourhis et al, J. Biol. Chem.
  • survivin-borealin-INCENP assemble via a three-helix bundle.
  • the present invention provides survivin-based, borealin-based, and INCENP -based peptidomimetic macrocycles that modulate the activities of CPC or Aurora B kinase by inhibiting the interactions between survivin, borealin, INCENP and Aurora B kinase, and that may be used for treating diseases including but not limited to cancer and other hyperproliferative diseases.
  • cross-linked peptides contain at least two modified amino acids that together form an intramolecular cross-link that can help to stabilize the alpha-helical secondary structures of a portion of survivin, borealin, or INCENP that is thought to be important for assembly of the survivin-borealin-INCENP three-helix bundle. Accordingly, a cross-linked polypeptide described herein can have improved biological activity relative to a corresponding polypeptide that is not cross-linked.
  • the borealin peptidomimetic macrocycles, survivin peptidomimetic macrocycles, and INCENP peptidomimetic macrocycles are thought to interfere with binding of survivin, borealin, INCENP and Aurora B kinase to each other to prevent assembly of the active CPC complex, thereby inducing apoptotic cell death.
  • peptidomimetic macrocycles described herein can be used therapeutically, for example to treat cancers and other disorders characterized by an an undesirably high level of activity of the CPC or any protein member thereof, uncluding undesirably high levels of survivin, borealin, INCENP and/or Aurora B kinase.
  • the borealin peptidomimetic macrocycles, survivin peptidomimetic macrocycles, and INCENP peptidomimetic macrocycles may also be useful for treatment of any disorder associated with disrupted regulation of the CPC, leading to conditions of excess cell survival and proliferation such as cancer and autoimmunity, in addition to conditions of inappropriate cell cycle arrest and apoptosis such as neurodegeneration and immunedeficiencies.
  • the present invention provides a peptidomimetic macrocycle comprising an amino acid sequence which is at least about 60%, 80%, 90%, or 95% identical to an amino acid sequence chosen from the group consisting of the amino acid sequences in Tables 1, 2, 3, or 7a.
  • an amino acid sequence of said peptidomimetic macrocycle is chosen from the group consisting of the amino acid sequences in Table 1.
  • peptidomimetic macrocycle comprises a helix, such as an a-helix.
  • the peptidomimetic macrocycle comprises an ⁇ , ⁇ -disubstituted amino acid.
  • a peptidomimetic macrocycle disclosed herein may comprise a crosslinker linking the a-positions of at least two amino acids. At least one of said two amino acids may be an ⁇ , ⁇ -disubstituted amino acid.
  • each A, C, D, and E is independently a natural or non-natural amino acid
  • B is a natural or non-natural amino acid, amino acid analog, O , [-NH-L3-CO-],
  • R and R 2 are independently -H, alkyl, alkenyl, alkynyl, arylalkyl, cycloalkyl, cycloalkylalkyl, heteroalkyl, or heterocycloalkyl, unsubstituted or substituted with halo-;
  • R 3 is hydrogen, alkyl, alkenyl, alkynyl, arylalkyl, heteroalkyl, cycloalkyl, heterocycloalkyl, cycloalkylalkyl, cycloaryl, or heterocycloaryl, optionally substituted with R 5 ;
  • L is a macrocycle-forming linker of the formula -Li-L 2 -;
  • Li and L 2 are independently alkylene, alkenylene, alkynylene, heteroalkylene, cycloalkylene, heterocycloalkylene, cycloarylene, heterocycloarylene, or [-R 4 -K-R4-] n , each being optionally substituted with R 5 ;
  • each R4 is alkylene, alkenylene, alkynylene, heteroalkylene, cycloalkylene, heterocycloalkylene, arylene, or heteroarylene;
  • each K is O, S, SO, S0 2 , CO, C0 2 , or CONR 3 ;
  • each R 5 is independently halogen, alkyl, -OR 6 , -N(R 6 ) 2 , -SR 6 , -SOR 6 , -S0 2 R 6 , -C0 2 R 6 , a fluorescent moiety, a radioisotope or a therapeutic agent;
  • each R6 is independently -H, alkyl, alkenyl, alkynyl, arylalkyl, cycloalkylalkyl, heterocycloalkyl, a fluorescent moiety, a radioisotope or a therapeutic agent;
  • R 7 is -H, alkyl, alkenyl, alkynyl, arylalkyl, cycloalkyl, heteroalkyl, cycloalkylalkyl,
  • heterocycloalkyl cycloaryl, or heterocycloaryl, optionally substituted with R 5 , or part of a cyclic structure with a D residue;
  • R 8 is -H, alkyl, alkenyl, alkynyl, arylalkyl, cycloalkyl, heteroalkyl, cycloalkylalkyl,
  • v and w are independently integers from 1 -1000;
  • u, x, y and z are independently integers from 0-10;
  • n is an integer from 1 -5.
  • a peptidomimetic macrocycles has the Formula (II):
  • each A, C, D, and E is independently a natural or non-natural amino acid
  • B is a natural or non-natural amino acid, amino acid analog, O , [-NH-L3-CO-], [-NH-L3-SO 2 -],
  • Rj and R 2 are independently -H, alkyl, alkenyl, alkynyl, arylalkyl, cycloalkyl, cycloalkylalkyl, heteroalkyl, or heterocycloalkyl, unsubstituted or substituted with halo-;
  • R3 is hydrogen, alkyl, alkenyl, alkynyl, arylalkyl, heteroalkyl, cycloalkyl, heterocycloalkyl,
  • cycloalkylalkyl cycloaryl, or heterocycloaryl, optionally substituted with R 5 ;
  • L is a macrocycle-forming linker of the formula
  • Lj, L 2 and L 3 are independently alkylene, alkenylene, alkynylene, heteroalkylene, cycloalkylene, heterocycloalkylene, cycloarylene, heterocycloarylene, or [-R4- -R4-] n , each being optionally substituted with R 5 ; each R4 is alkylene, alkenylene, alkynylene, heteroalkylene, cycloalkylene, heterocycloalkylene, arylene, or hetero arylene;
  • each K is O, S, SO, S0 2 , CO, C0 2 , or CONR 3 ;
  • each R 5 is independently halogen, alkyl, -OR 6 , -N(R ⁇ 5) 2 , -SR 6 , -SOR 5 , -S0 2 R 6 , -C0 2 R ⁇ 5, a fluorescent moiety, a radioisotope or a therapeutic agent;
  • each R 6 is independently -H, alkyl, alkenyl, alkynyl, arylalkyl, cycloalkylalkyl, heterocycloalkyl, a fluorescent moiety, a radioisotope or a therapeutic agent;
  • R 7 is -H, alkyl, alkenyl, alkynyl, arylalkyl, cycloalkyl, heteroalkyl, cycloalkylalkyl, heterocycloalkyl, cycloaryl, or heterocycloaryl, optionally substituted with R 5 , or part of a cyclic structure with a D residue;
  • Rg is -H, alkyl, alkenyl, alkynyl, arylalkyl, cycloalkyl, heteroalkyl, cycloalkylalkyl, heterocycloalkyl, cycloaryl, or heterocycloaryl, optionally substituted with R 5 , or part of a cyclic structure with an E residue; v and w are independently integers from 1 -1000;
  • u, x, y and z are independently integers from 0-10;
  • n is an integer from 1 -5.
  • a peptidomimetic macrocycles has the Formula (III):
  • each A, C, D, and E is independently a natural or non-natural amino acid
  • B is a natural or non-natural amino acid, amino acid analog, O , [-NH-L4-CO-], [-NH-L 4 -S0 2 -], or [-NH-L4-] ;
  • Ri and R 2 are independently -H, alkyl, alkenyl, alkynyl, arylalkyl, cycloalkyl, cycloalkylalkyl, heteroalkyl, or heterocycloalkyl, unsubstituted or substituted with halo-;
  • R 3 is hydrogen, alkyl, alkenyl, alkynyl, arylalkyl, heteroalkyl, cycloalkyl, heterocycloalkyl,
  • cycloalkylalkyl cycloaryl, or heterocycloaryl, unsubstituted or substituted with R 5 ;
  • L 1; L 2 , L 3 and L 4 are independently alkylene, alkenylene, alkynylene, heteroalkylene, cycloalkylene, heterocycloalkylene, cycloarylene, heterocycloarylene or [-R 4 - -R 4 -]n, each being unsubstituted or substituted with R 5 ;
  • K is O, S, SO, S0 2 , CO, C0 2 , or CONR 3 ;
  • each R 4 is alkylene, alkenylene, alkynylene, heteroalkylene, cycloalkylene, heterocycloalkylene, arylene, or hetero arylene;
  • each R 5 is independently halogen, alkyl, -OR 6 , -N(R 6 ) 2 , -SR 6 , -SOR ⁇ 5, -S0 2 R 6 , -C0 2 R ⁇ 5, a fluorescent moiety, a radioisotope or a therapeutic agent;
  • each R 6 is independently -H, alkyl, alkenyl, alkynyl, arylalkyl, cycloalkylalkyl, heterocycloalkyl, a fluorescent moiety, a radioisotope or a therapeutic agent;
  • R7 is -H, alkyl, alkenyl, alkynyl, arylalkyl, cycloalkyl, heteroalkyl, cycloalkylalkyl, heterocycloalkyl, cycloaryl, or heterocycloaryl, unsubstituted or substituted with R 5j or part of a cyclic structure with a D residue;
  • R 8 is -H, alkyl, alkenyl, alkynyl, arylalkyl, cycloalkyl, heteroalkyl, cycloalkylalkyl, heterocycloalkyl, cycloaryl, or heterocycloaryl, unsubstituted or substituted with R 5 or part of a cyclic structure with an E residue;
  • v and w are independently integers from 1 -1000; u, x, y and z are independently integers from 0-10; and
  • n is an integer from 1 -5.
  • the peptidomimetic macrocycle may comprise a crosslinker linking a backbone amino group of a first amino acid to a second amino acid within the peptidomimetic macrocycle.
  • the invention provides peptidomimetic macrocycles of the formula (IV) or (
  • each A, C, D, and E is independently a natural or non-natural amino acid
  • B is a natural or non-natural amino acid, amino acid analog, H O , [-NH-L3-CO-],
  • R and R 2 are independently -H, alkyl, alkenyl, alkynyl, arylalkyl, cycloalkyl, cycloalkylalkyl, heteroalkyl, or heterocycloalkyl, unsubstituted or substituted with halo-, or part of a cyclic structure with an E residue;
  • R 3 is hydrogen, alkyl, alkenyl, alkynyl, arylalkyl, heteroalkyl, cycloalkyl, heterocycloalkyl, cycloalkylalkyl, cycloaryl, or heterocycloaryl, optionally substituted with R 5 ;
  • Li and L 2 are independently alkylene, alkenylene, alkynylene, heteroalkylene, cycloalkylene, heterocycloalkylene, cycloarylene, heterocycloarylene, or [-R 4 -K-R4-] n , each being optionally substituted with R 5 ;
  • each R4 is alkylene, alkenylene, alkynylene, heteroalkylene, cycloalkylene, heterocycloalkylene, arylene, or heteroarylene;
  • each K is O, S, SO, S0 2 , CO, C0 2 , or CONR 3 ;
  • R 7 is -H, alkyl, alkenyl, alkynyl, arylalkyl, cycloalkyl, heteroalkyl, cycloalkylalkyl,
  • heterocycloalkyl cycloaryl, or heterocycloaryl, optionally substituted with R 5 ;
  • v and w are independently integers from 1-1000;
  • u, x, y and z are independently integers from 0-10;
  • n is an integer from 1-5.
  • the invention provides a method of treating cancer in a subject comprising
  • a method of modulating the activity of CPC or Aurora B Kinase in a subject comprising administering to the subject a peptidomimetic macrocycle disclosed herein, or a method of antagonizing the interaction between survivin, borealin, INCENP and Aurora B kinase proteins in a subject comprising administering to the subject such a peptidomimetic macrocycle.
  • FIGURE 1 shows the complex between the alpha-helical segments of borealin and survivin.
  • microcycle refers to a molecule having a chemical structure including a ring or cycle formed by at least 9 covalently bonded atoms.
  • peptidomimetic macrocycle or "crosslinked polypeptide” refers to a compound comprising a plurality of amino acid residues joined by a plurality of peptide bonds and at least one macrocycle-forming linker which forms a macrocycle between a first naturally- occurring or non-naturally-occurring amino acid residue (or analog) and a second naturally- occurring or non-naturally-occurring amino acid residue (or analog) within the same molecule.
  • Peptidomimetic macrocycle include embodiments where the macrocycle-forming linker connects the a carbon of the first amino acid residue (or analog) to the a carbon of the second amino acid residue (or analog).
  • the peptidomimetic macrocycles optionally include one or more non-peptide bonds between one or more amino acid residues and/or amino acid analog residues, and optionally include one or more non-naturally-occurring amino acid residues or amino acid analog residues in addition to any which form the macrocycle.
  • a "corresponding uncrosslinked polypeptide" when referred to in the context of a peptidomimetic macrocycle is understood to relate to a polypeptide of the same length as the macrocycle and comprising the equivalent natural amino acids of the wild-type sequence corresponding to the macrocycle.
  • the term "stability" refers to the maintenance of a defined secondary structure in solution by a peptidomimetic macrocycle as measured by circular dichroism, NMR or another biophysical measure, or resistance to proteolytic degradation in vitro or in vivo.
  • secondary structures contemplated herein are a-helices, 31 0 helices, ⁇ -turns, and ⁇ - pleated sheets.
  • helical stability refers to the maintenance of a helical structure by a peptidomimetic macrocycle as measured by circular dichroism or NMR.
  • a peptidomimetic macrocycle exhibits at least a 1.25, 1.5, 1.75 or 2-fold increase in a-helicity as determined by circular dichroism compared to a corresponding uncrosslinked macrocycle.
  • amino acid refers to a molecule containing both an amino group and a carboxyl group. Suitable amino acids include, without limitation, both the D-and L-isomers of the naturally-occurring amino acids, as well as non-naturally occurring amino acids prepared by organic synthesis or other metabolic routes.
  • amino acid as used herein, includes, without limitation, a-amino acids, natural amino acids, non-natural amino acids, and amino acid analogs.
  • a-amino acid refers to a molecule containing both an amino group and a carboxyl group bound to a carbon which is designated the a-carbon.
  • ⁇ -amino acid refers to a molecule containing both an amino group and a carboxyl group in a ⁇ configuration.
  • Hydrophobic amino acids include small hydrophobic amino acids and large hydrophobic amino acids
  • amino acids amino acids. "Small hydrophobic amino acid” are glycine, alanine, proline, and analogs thereof. “Large hydrophobic amino acids” are valine, leucine, isoleucine, phenylalanine, methionine, tryptophan, and analogs thereof. “Polar amino acids” are serine, threonine, asparagine, glutamine, cysteine, tyrosine, and analogs thereof. “Charged amino acids” are lysine, arginine, histidine, aspartate, glutamate, and analogs thereof.
  • amino acid analog refers to a molecule which is structurally similar to an amino acid and which can be substituted for an amino acid in the formation of a peptidomimetic macrocycle.
  • Amino acid analogs include, without limitation, ⁇ -amino acids and amino acids where the amino or carboxy group is substituted by a similarly reactive group (e.g. , substitution of the primary amine with a secondary or tertiary amine, or substitution of the carboxy group with an ester).
  • non-natural amino acid refers to an amino acid which is not one of the twenty amino acids commonly found in peptides synthesized in nature, and known by the one letter abbreviations A, R, N, C, D, Q, E, G, H, I, L, K, M, F, P, S, T, W, Y and V.
  • Non-natural amino acids or amino acid analogs include, without limitation, structures according to the following:
  • Amino acid analogs include ⁇ -amino acid analogs.
  • ⁇ -amino acid analogs include, but are not limited to, the following: cyclic ⁇ -amino acid analogs; ⁇ - alanine; (R) - ⁇ - phenylalanine; (R) - 1,2,3,4 - tetrahydro - isoquinoline - 3 - acetic acid; (R) - 3 - amino - 4 - (1 - naphthyl) - butyric acid; (R) - 3 - amino - 4 - (2,4 - dichlorophenyl)butyric acid; (R) - 3 - amino - 4 - (2 - chlorophenyl) - butyric acid; (R) - 3 - amino - 4 - (2 - cyanophenyl) - butyric acid; (R) - 3
  • Amino acid analogs include analogs of alanine, valine, glycine or leucine.
  • Examples of amino acid analogs of alanine, valine, glycine, and leucine include, but are not limited to, the following: a - methoxy glycine; a - allyl - L - alanine; a - aminoisobutyric acid; a - methyl - leucine; ⁇ - (1
  • Amino acid analogs include analogs of arginine or lysine.
  • amino acid analogs of arginine and lysine include, but are not limited to, the following: citrulline; L - 2 - amino - 3 - guanidinopropionic acid; L - 2 - amino - 3 - ureidopropionic acid; L - citrulline; Lys(Me) 2 - OH; Lys(N 3 ) - OH; ⁇ - benzyloxycarbonyl - L - ornithine; ⁇ - nitro - D - arginine; ⁇ - nitro - L
  • Arg(Me) 2 - OH (asymmetrical); Arg(Me)2 - OH (symmetrical); Lys(ivDde) - OH; Lys(Me)2 - OH ⁇ HC1; Lys(Me3) - OH chloride; ⁇ - nitro - D - arginine; and ⁇ - nitro - L - arginine.
  • Amino acid analogs include analogs of aspartic or glutamic acids. Examples of amino acid
  • analogs of aspartic and glutamic acids include, but are not limited to, the following: a - methyl - D - aspartic acid; a - methyl - glutamic acid; a - methyl - L - aspartic acid; ⁇ - methylene - glutamic acid; (N - ⁇ - ethyl) - L - glutamine; [N - a - (4 - aminobenzoyl)] - L - glutamic acid; 2,6 - diaminopimelic acid; L - a - aminosuberic acid; D - 2 - aminoadipic acid; D - a - aminosuberic acid; a - aminopimelic acid; iminodiacetic acid; L - 2 - aminoadipic acid; threo - - methyl - aspartic acid; ⁇ - carboxy - D - glutamic acid ⁇ , ⁇ - di - 1 -
  • Amino acid analogs include analogs of cysteine and methionine.
  • Examples of amino acid analo of cysteine and methionine include, but are not limited to, Cys(farnesyl) - OH, Cys(farnesyl) - OMe, a - methyl - methionine, Cys(2 - hydroxyethyl) - OH, Cys(3 - aminopropyl) - OH, 2 - amino - 4 - (ethylthio)butyric acid, buthionine, buthioninesulfoximine, ethionine, methionine methylsulfonium chloride, selenomethionine, cysteic acid, [2 - (4 - pyridyl)ethyl] - DL - penicillamine, [2 - (4 - pyridyl) ethyl] - L - cysteine, 4 -
  • Amino acid analogs include analogs of phenylalanine and tyrosine.
  • amino acid analogs of phenylalanine and tyrosine include ⁇ - methyl - phenylalanine, ⁇ - hydroxyphenylalanine, a - methyl - 3 - methoxy - DL - phenylalanine, a - methyl - D - phenylalanine, a - methyl - L - phenylalanine, 1,2,3,4 - tetrahydroisoquinoline - 3 - carboxylic acid, 2,4 - dichloro - phenylalanine, 2 - (trifluoromethyl) - D -phenylalanine, 2 - (trifluoromethyl) - L - phenylalanine, 2 - bromo - D - phenylalanine, 2 - bromo - L - phenylalanine,
  • - phenylalanine 4 - bis(2 - chloroethyl)amino - L - phenylalanine, 4 - bromo - D - phenylalanine, 4 - bromo - L - phenylalanine, 4 - chloro - D - phenylalanine, 4 - chloro - L - phenylalanine, 4 - cyano - D - phenylalanine, 4 - cyano - L - phenylalanine, 4 - fluoro - D - phenylalanine, 4 - fluoro - L - phenylalanine, 4 - fluoro - L - phenylalanine, 4 - iodo - D - phenylalanine, 4 - iodo - L - phenylalanine, homophenylalanine, thyroxine, 3,3
  • Amino acid analogs include analogs of proline. Examples of amino acid analogs of proline
  • Amino acid analogs include analogs of serine and threonine.
  • Examples of amino acid analogs of serine and threonine include, but are not limited to, 3 - amino - 2 - hydroxy - 5 - methylhexanoic acid, 2 - amino - 3 - hydroxy - 4 - methylpentanoic acid, 2 - amino - 3 - ethoxybutanoic acid, 2 - amino - 3 - methoxybutanoic acid, 4 - amino - 3 - hydroxy - 6 - methylheptanoic acid, 2 - amino - 3 - benzyloxypropionic acid, 2 - amino - 3 - benzyloxypropionic acid, 2 - amino - 3 - ethoxypropionic acid, 4 - amino - 3 - hydroxybutanoic acid, and a-methylserine.
  • Amino acid analogs include analogs of tryptophan. Examples of amino acid analogs of
  • tryptophan include, but are not limited to, the following: a - methyl - tryptophan; ⁇ - (3 - benzothienyl) - D - alanine; ⁇ - (3 - benzothienyl) - L - alanine; 1 - methyl - tryptophan; 4 - methyl - tryptophan; 5 - benzyloxy - tryptophan; 5 - bromo - tryptophan; 5 - chloro - tryptophan;
  • amino acid analogs are racemic.
  • the D isomer of the amino acid analog is used.
  • the L isomer of the amino acid analog is used.
  • the amino acid analog comprises chiral centers that are in the R or S configuration.
  • the amino group(s) of a ⁇ -amino acid analog is substituted with a protecting group, e.g. , tert-butyloxycarbonyl (BOC group), 9- fluorenylmethyloxycarbonyl (FMOC), tosyl, and the like.
  • the carboxylic acid functional group of a ⁇ -amino acid analog is protected, e.g., as its ester derivative.
  • the salt of the amino acid analog is used.
  • a "non-essential" amino acid residue is a residue that can be altered from the wild-type sequence of a polypeptide without abolishing or substantially altering its essential biological or biochemical activity (e.g., receptor binding or activation).
  • An "essential” amino acid residue is a residue that, when altered from the wild-type sequence of the polypeptide, results in abolishing or substantially abolishing the polypeptide's essential biological or biochemical activity.
  • a “conservative amino acid substitution” is one in which the amino acid residue is replaced with an amino acid residue having a similar side chain.
  • Families of amino acid residues having similar side chains have been defined in the art. These families include amino acids with basic side chains (e.g., K, R, H), acidic side chains (e.g., D, E), uncharged polar side chains (e.g., G, N, Q, S, T, Y, C), nonpolar side chains (e.g., A, V, L, I, P, F, M, W), beta-branched side chains (e.g., T, V, I) and aromatic side chains (e.g., Y, F, W, H).
  • basic side chains e.g., K, R, H
  • acidic side chains e.g., D, E
  • uncharged polar side chains e.g., G, N, Q, S, T, Y, C
  • nonpolar side chains e.g., A, V, L
  • a predicted nonessential amino acid residue in a polypeptide is replaced with another amino acid residue from the same side chain family.
  • Other examples of acceptable substitutions are substitutions based on isosteric considerations (e.g. norleucine for methionine) or other properties (e.g. 2-thienylalanine for phenylalanine, or 6-Cl-tryptophan for tryptophan).
  • capping group refers to the chemical moiety occurring at either the carboxy or amino terminus of the polypeptide chain of the subject peptidomimetic macrocycle.
  • the capping group of a carboxy terminus includes an unmodified carboxylic acid (ie -COOH) or a carboxylic acid with a substituent.
  • the carboxy terminus can be substituted with an amino group to yield a carboxamide at the C-terminus.
  • substituents include but are not limited to primary and secondary amines, including pegylated secondary amines. Representative secondary
  • amylam ide isoamylam ide hexylamide 3,3-dimethylbutylamide
  • the capping group of an amino terminus includes an unmodified amine (ie -NH 2 ) or an amine with a substituent.
  • the amino terminus can be substituted with an acyl group to yield a carboxamide at the N-terminus.
  • substituents include but are not limited to substituted acyl groups, including C 1 -C6 carbonyls, C7-C30 carbonyls, and pegylated carbamates.
  • Representative capping groups for the N-terminus include:
  • mdPEG7 [0041]
  • the term "member" as used herein in conjunction with macrocycles or macrocycle -forming linkers refers to the atoms that form or can form the macrocycle, and excludes substituent or side chain atoms.
  • cyclodecane, 1 ,2-difluoro-decane and 1 ,3-dimethyl cyclodecane are all considered ten-membered macrocycles as the hydrogen or fluoro substituents or methyl side chains do n ipate in forming the macrocycle.
  • amino acid side chain refers to a moiety attached to the a-carbon (or another
  • the amino acid side chain for alanine is methyl
  • the amino acid side chain for phenylalanine is phenylmethyl
  • the amino acid side chain for cysteine is thiomethyl
  • the amino acid side chain for aspartate is carboxymethyl
  • the amino acid side chain for tyrosine is 4-hydroxyphenylmethyl, etc.
  • Other non-naturally occurring amino acid side chains are also included, for example, those that occur in nature ⁇ e.g. , an amino acid metabolite) or those that are made synthetically ⁇ e.g., an ⁇ , ⁇ di-substituted amino acid).
  • ⁇ , ⁇ di-substituted amino acid refers to a molecule or moiety containing both an
  • polypeptide encompasses two or more naturally or non-naturally-occurring amino acids joined by a covalent bond ⁇ e.g., an amide bond).
  • Polypeptides as described herein include full length proteins ⁇ e.g. , fully processed proteins) as well as shorter amino acid sequences ⁇ e.g. , fragments of naturally-occurring proteins or synthetic polypeptide fragments).
  • microcyclization reagent or "macrocycle-forming reagent” as used herein refers to any reagent which can be used to prepare a peptidomimetic macrocycle by mediating the reaction between two reactive groups.
  • Reactive groups can be, for example, an azide and alkyne
  • macrocyclization reagents include, without limitation, Cu reagents such as reagents which provide a reactive Cu(I) species, such as CuBr, Cul or CuOTf, as well as Cu(II) salts such as Cu(C0 2 CH 3 ) 2 , CuS0 4 , and CuCl 2 that can be converted in situ to an active Cu(I) reagent by the addition of a reducing agent such as ascorbic acid or sodium ascorbate.
  • Macrocyclization reagents can additionally include, for example, Ru reagents known in the art such as
  • macrocyclization reagents or macrocycle-forming reagents are metathesis catalysts including, but not limited to, stabilized, late transition metal carbene complex catalysts such as Group VIII transition metal carbene catalysts.
  • catalysts are Ru and Os metal centers having a +2 oxidation state, an electron count of 16 and pentacoordinated.
  • catalysts have W or Mo centers.
  • Various catalysts are disclosed in Grubbs et al., "Ring Closing Metathesis and Related Processes in Organic Synthesis" Acc. Chem. Res. 1995, 28, 446-452, U.S. Pat. No. 5,81 1 ,515; U.S. Pat. No. 7,932,397; U.S. Application No.
  • the reactive groups are thiol groups.
  • the macrocyclization reagent is, for example, a linker functionalized with two thiol-reactive groups such as halogen groups.
  • halo or halogen refers to fluorine, chlorine, bromine or iodine or a radical thereof.
  • alkyl refers to a hydrocarbon chain that is a straight chain or branched chain
  • Ci-Cio indicates that the group has from 1 to 10 (inclusive) carbon atoms in it.
  • alkyl is a chain (straight or branched) having 1 to 20 (inclusive) carbon atoms in it.
  • alkylene refers to a divalent alkyl (i.e., -R-).
  • alkenyl refers to a hydrocarbon chain that is a straight chain or branched chain
  • alkenyl moiety contains the indicated number of carbon atoms.
  • C 2 -Ci 0 indicates that the group has from 2 to 10
  • alkenyl refers to a C2-C6 alkenyl chain. In the absence of any numerical designation, “alkenyl” is a chain (straight or branched) having 2 to 20 (inclusive) carbon atoms in it.
  • alkynyl refers to a hydrocarbon chain that is a straight chain or branched chain
  • alkynyl moiety contains the indicated number of carbon atoms.
  • C2-C10 indicates that the group has from 2 to 10
  • alkynyl refers to a C2-C6 alkynyl chain. In the absence of any numerical designation, “alkynyl” is a chain (straight or branched) having 2 to 20 (inclusive) carbon atoms in it.
  • aryl refers to a 6-carbon monocyclic or 10-carbon bicyclic aromatic ring system wherein 0, 1 , 2, 3, or 4 atoms of each ring are substituted by a substituent.
  • aryl groups include phenyl, naphthyl and the like.
  • Arylalkyl refers to an aryl group, as defined above, wherein one of the aryl group's hydrogen atoms has been replaced with a C1-C5 alkyl group, as defined above.
  • Representative examples of an arylalkyl group include, but are not limited to, 2-methylphenyl, 3 -methylphenyl, 4- methylphenyl, 2-ethylphenyl, 3-ethylphenyl, 4-ethylphenyl, 2-propylphenyl, 3-propylphenyl, 4- propylphenyl, 2-butylphenyl, 3-butylphenyl, 4-butylphenyl, 2-pentylphenyl, 3-pentylphenyl, 4- pentylphenyl, 2-isopropylphenyl, 3-isopropylphenyl, 4-isopropylphenyl, 2-isobutylphenyl, 3- isobutylphenyl, 4-isobutylphen
  • Arylamido refers to an aryl group, as defined above, wherein one of the aryl group's hydrogen atoms has been replaced with one or more -C(0)NH 2 groups.
  • Representative examples of an arylamido group include 2-C(0)NH2-phenyl, 3-C(0)NH 2 -phenyl, 4-C(0)NH 2 -phenyl, 2- C(0)NH 2 -pyridyl, 3-C(0)NH 2 -pyridyl, and 4-C(0)NH 2 -pyridyl,
  • Alkylheterocycle refers to a C r C 5 alkyl group, as defined above, wherein one of the C r C 5 alkyl group's hydrogen atoms has been replaced with a heterocycle.
  • Representative examples of an alkylheterocycle group include, but are not limited to, -CH 2 CH 2 -morpholine, -CH 2 CH 2 - piperidine, -CH 2 CH 2 CH 2 -morpholine, and -CH 2 CH 2 CH 2 -imidazole.
  • Alkylamido refers to a Ci-C 5 alkyl group, as defined above, wherein one of the Ci-C 5 alkyl group's hydrogen atoms has been replaced with a -C(0)NH 2 group.
  • Representative examples of an alkylamido group include, but are not limited to, -CH 2 -C(0)NH 2 , -CH 2 CH 2 -C(0)NH 2 , - CH 2 CH 2 CH 2 C(0)NH 2 , -CH 2 CH 2 CH 2 CH 2 C(0)NH 2 , -CH 2 CH 2 CH 2 CH 2 C(0)NH 2 , -CH 2 CH(C(0)NH 2 )CH 3 , -CH 2 CH(C(0)NH 2 )CH 2 CH 3 , -CH(C(0)NH 2 )CH 2 CH 3 , - C(CH 3 ) 2 CH 2 C(0)NH 2 , -CH 2 -CH 2 -NH-C(0)-CH 3 , -CH 2 -CH 2 -NH-C(0)-CH 3 ,
  • alkanol refers to a C r C 5 alkyl group, as defined above, wherein one of the C r C 5 alkyl group's hydrogen atoms has been replaced with a hydroxyl group.
  • Representative examples of an alkanol group include, but are not limited to, -CH 2 OH, -CH 2 CH 2 OH, -CH 2 CH 2 CH 2 OH, - CH 2 CH 2 CH 2 CH 2 OH, -CH 2 CH 2 CH 2 CH 2 CH 2 OH, -CH 2 CH(OH)CH 3 , -CH 2 CH(OH)CH 2 CH 3 , - CH(OH)CH 3 and -C(CH 3 ) 2 CH 2 OH.
  • Alkylcarboxy refers to a Ci-C 5 alkyl group, as defined above, wherein one of the Ci-C 5 alkyl group's hydrogen atoms has been replaced with a -COOH group.
  • Representative examples of an alkylcarboxy group include, but are not limited to, -CH 2 COOH, -CH 2 CH 2 COOH, - CH 2 CH 2 CH 2 COOH, -CH 2 CH 2 CH 2 CH 2 COOH, -CH 2 CH(COOH)CH 3 , - CH 2 CH 2 CH 2 CH 2 COOH, -CH 2 CH(COOH)CH 2 CH 3 , -CH(COOH)CH 2 CH 3 and - C(CH 3 ) 2 CH 2 COOH.
  • cycloalkyl as employed herein includes saturated and partially unsaturated cyclic hydrocarbon groups having 3 to 12 carbons, preferably 3 to 8 carbons, and more preferably 3 to 6 carbons, wherein the cycloalkyl group additionally is optionally substituted.
  • Some cycloalkyl groups include, without limitation, cyclopropyl, cyclobutyl, cyclopentyl, cyclopentenyl, cyclohexyl, cyclohexenyl, cycloheptyl, and cyclooctyl.
  • heteroaryl refers to an aromatic 5-8 membered monocyclic, 8-12 membered bicyclic, or 1 1 -14 membered tricyclic ring system having 1 -3 heteroatoms if monocyclic, 1 -6 heteroatoms if bicyclic, or 1 -9 heteroatoms if tricyclic, said heteroatoms selected from O, N, or S (e.g., carbon atoms and 1 -3, 1 -6, or 1 -9 heteroatoms of O, N, or S if monocyclic, bicyclic, or tricyclic, respectively), wherein 0, 1 , 2, 3, or 4 atoms of each ring are substituted by a substituent.
  • heteroaryl groups include pyridyl, furyl or furanyl, imidazolyl, benzimidazolyl, pyrimidinyl, thiophenyl or thienyl, quinolinyl, indolyl, thiazolyl, and the like.
  • heteroarylalkyl or the term “heteroaralkyl” refers to an alkyl substituted with a
  • heteroarylalkoxy refers to an alkoxy substituted with heteroaryl.
  • heteroarylalkyl or the term “heteroaralkyl” refers to an alkyl substituted with a
  • heteroarylalkoxy refers to an alkoxy substituted with heteroaryl.
  • heterocyclyl refers to a nonaromatic 5-8 membered monocyclic, 8-12 membered bicyclic, or 1 1 -14 membered tricyclic ring system having 1 -3 heteroatoms if monocyclic, 1 -6 heteroatoms if bicyclic, or 1 -9 heteroatoms if tricyclic, said heteroatoms selected from O, N, or S (e.g. , carbon atoms and 1 -3, 1 -6, or 1 -9 heteroatoms of O, N, or S if monocyclic, bicyclic, or tricyclic, respectively), wherein 0, 1 , 2 or 3 atoms of each ring are substituted by a substituent.
  • heterocyclyl groups include piperazinyl, pyrrolidinyl, dioxanyl, morpholinyl, tetrahydrofuranyl, and the like.
  • substituted refers to a group replacing a second atom or group such as a hydrogen atom on any molecule, compound or moiety. Suitable substituents include, without limitation, halo, hydroxy, mercapto, oxo, nitro, haloalkyl, alkyl, alkaryl, aryl, aralkyl, alkoxy, thioalkoxy, aryloxy, amino, alkoxycarbonyl, amido, carboxy, alkanesulfonyl, alkylcarbonyl, and cyano groups.
  • the compounds disclosed herein contain one or more asymmetric centers and thus occur as racemates and racemic mixtures, single enantiomers, individual diastereomers and diastereomeric mixtures. All such isomeric forms of these compounds are included unless expressly provided otherwise.
  • the compounds disclosed herein are also represented in multiple tautomeric forms, in such instances, the compounds include all tautomeric forms of the compounds described herein (e.g., if alkylation of a ring system results in alkylation at multiple sites, the invention includes all such reaction products). All such isomeric forms of such compounds are included unless expressly provided otherwise. All crystal forms of the compounds described herein are included unless expressly provided otherwise.
  • the terms “increase” and “decrease” mean, respectively, to cause a statistically significantly (i.e., p ⁇ 0.1) increase or decrease of at least 5%.
  • variable is equal to any of the values within that range.
  • variable is equal to any integer value within the numerical range, including the end- points of the range.
  • variable is equal to any real value within the numerical range, including the end-points of the range.
  • a variable which is described as having values between 0 and 2 takes the values 0, 1 or 2 if the variable is inherently discrete, and takes the values 0.0, 0.1 , 0.01 , 0.001, or any other real values > 0 and ⁇ 2 if the variable is inherently continuous.
  • word "or” is used in the inclusive sense of "and/or” and not the exclusive sense of "either/or.”
  • on average represents the mean value derived from performing at least three
  • biological activity encompasses structural and functional properties of a macrocycle.
  • Bioactivity is, for example, structural stability, alpha-helicity, affinity for a target, resistance to proteolytic degradation, cell penetrability, intracellular stability, in vivo stability, or any combination thereof.
  • the peptide sequences are derived from the survivin, borealin or INCENP proteins.
  • a non-limiting exemplary list of suitable survivin peptides for use in the present invention is
  • each A, C, D, and E is independently a natural or non-natural amino acid
  • B is a natural or non-natural amino acid, amino acid analog, O , [-NH-L3-CO-],
  • R and R 2 are independently -H, alkyl, alkenyl, alkynyl, arylalkyl, cycloalkyl, cycloalkylalkyl, heteroalkyl, or heterocycloalkyl, unsubstituted or substituted with halo-;
  • R 3 is hydrogen, alkyl, alkenyl, alkynyl, arylalkyl, heteroalkyl, cycloalkyl, heterocycloalkyl, cycloalkylalkyl, cycloaryl, or heterocycloaryl, optionally substituted with R 5 ;
  • L is a macrocycle-forming linker of the formula -Li-L 2 -;
  • Li and L 2 are independently alkylene, alkenylene, alkynylene, heteroalkylene, cycloalkylene, heterocycloalkylene, cycloarylene, heterocycloarylene, or [-R 4 -K-R4-] n , each being optionally substituted with R 5 ;
  • each R4 is alkylene, alkenylene, alkynylene, heteroalkylene, cycloalkylene, heterocycloalkylene, arylene, or heteroarylene;
  • each K is O, S, SO, S0 2 , CO, C0 2 , or CONR 3 ;
  • each R 5 is independently halogen, alkyl, -OR 6 , -N(R 6 ) 2 , -SR 6 , -SOR 6 , -S0 2 R 6 , -C0 2 R 6 , a fluorescent moiety, a radioisotope or a therapeutic agent;
  • each R6 is independently -H, alkyl, alkenyl, alkynyl, arylalkyl, cycloalkylalkyl, heterocycloalkyl, a fluorescent moiety, a radioisotope or a therapeutic agent;
  • R 7 is -H, alkyl, alkenyl, alkynyl, arylalkyl, cycloalkyl, heteroalkyl, cycloalkylalkyl,
  • R 8 is -H, alkyl, alkenyl, alkynyl, arylalkyl, cycloalkyl, heteroalkyl, cycloalkylalkyl, heterocycloalkyl, cycloaryl, or heterocycloaryl, optionally substituted with R 5 , or part of a cyclic structure with an E residue;
  • v and w are independently integers from 1 -1000;
  • u, x, y and z are independently integers from 0-10;
  • n is an integer from 1 -5.
  • At least one of Ri and R2 is alkyl, unsubstituted or substituted with halo-. In another example, both Ri and R2 are independently alkyl, unsubstituted or substituted with halo-. In some embodiments, at least one of Ri and R2 is methyl. In other embodiments, Ri and R2 are methyl.
  • x+y+z is at least 3. In other embodiments of the invention, x+y+z is 1 , 2, 3, 4, 5, 6, 7, 8, 9 or 10.
  • Each occurrence of A, B, C, D or E in a macrocycle or macrocycle precursor of the invention is independently selected.
  • a sequence represented by the formula [A] x when x is 3, encompasses embodiments where the amino acids are not identical, e.g. Gin-Asp-Ala as well as embodiments where the amino acids are identical, e.g. Gln-Gln- Gln. This applies for any value of x, y, or z in the indicated ranges.
  • each compound of the invention may encompass peptidomimetic macrocycles which are the same or different.
  • a compound of the invention may comprise peptidomimetic macrocycles comprising different linker lengths or chemical compositions.
  • the peptidomimetic macrocycle comprises a secondary structure which is an a-helix and Rg is -H, allowing intrahelical hydrogen bonding.
  • at least one of A, B, C, D or E is an ⁇ , ⁇ -disubstituted amino acid.
  • B is an ⁇ , ⁇ - disubstituted amino acid.
  • at least one of A, B, C, D or E is 2-aminoisobutyric acid.
  • At least one of A, B, C, D or E is
  • the length of the macrocycle-forming linker L as measured from a first Ca to a second Ca is selected to stabilize a desired secondary peptide structure, such as an a-helix formed by residues of the peptidomimetic macrocycle including, but not necessarily limited to, those between the first Ca to a second Ca.
  • each Ri and R2 is independently independently -H, alkyl, alkenyl, alkynyl, arylalkyl, cycloalkyl, cycloalkylalkyl, heteroalkyl, or heterocycloalkyl, unsubstituted or substituted with halo-.
  • the peptidomimetic macrocycle of Formula (I) is: or
  • the peptidomimetic macrocycle of Formula (I) is a compound of any of the formulas shown below:
  • AA represents any natural or non-natural amino acid side chain and " ⁇ " is [D] v , [E] w as defined above, and n is an integer between 0 and 20, 50, 100, 200, 300, 400 or 500. In some embodiments, n is 0. In other embodiments, n is less than 50. [0086] Exemplary embodiments of the macrocycle-forming linker L are shown below.
  • R H, alkyl, other substituent
  • the peptidomimetic macrocycles disclosed herein have the Formula (II):
  • each A, C, D, and E is independently a natural or non-natural amino acid
  • B is a natural or non-natural amino acid, amino acid analog, O , [-NH-L3-CO-],
  • Ri and R 2 are independently -H, alkyl, alkenyl, alkynyl, arylalkyl, cycloalkyl, cycloalkylalkyl, heteroalkyl, or heterocycloalkyl, unsubstituted or substituted with halo-;
  • R3 is hydrogen, alkyl, alkenyl, alkynyl, arylalkyl, heteroalkyl, cycloalkyl, heterocycloalkyl, cycloalkylalkyl, cycloaryl, or heterocycloaryl, optionally substituted with R 5 ;
  • L is a macrocycle-forming linker of the formula Li, L 2 and L 3 are independently alkylene, alkenylene, alkynylene, heteroalkylene, cycloalkylene, heterocycloalkylene, cycloarylene, heterocycloarylene, or [-R 4 -K-R4-] n , each being optionally substituted with R 5 ;
  • each R4 is alkylene, alkenylene, alkynylene, heteroalkylene, cycloalkylene, heterocycloalkylene, arylene, or heteroarylene;
  • each K is O, S, SO, S0 2 , CO, C0 2 , or CONR 3 ;
  • each R 5 is independently halogen, alkyl, -OR 6 , -N(R 6 ) 2 , -SR 6 , -SOR 6 , -S0 2 R 6 , -C0 2 R 6 , a fluorescent moiety, a radioisotope or a therapeutic agent;
  • each R6 is independently -H, alkyl, alkenyl, alkynyl, arylalkyl, cycloalkylalkyl, heterocycloalkyl, a fluorescent moiety, a radioisotope or a therapeutic agent;
  • R 7 is -H, alkyl, alkenyl, alkynyl, arylalkyl, cycloalkyl, heteroalkyl, cycloalkylalkyl,
  • heterocycloalkyl cycloaryl, or heterocycloaryl, optionally substituted with R 5 , or part of a cyclic structure with a D residue;
  • Rg is -H, alkyl, alkenyl, alkynyl, arylalkyl, cycloalkyl, heteroalkyl, cycloalkylalkyl,
  • heterocycloalkyl cycloaryl, or heterocycloaryl, optionally substituted with R 5 , or part of a cyclic structure with an E residue;
  • v and w are independently integers from 1-1000;
  • u, x, y and z are independently integers from 0-10;
  • n is an integer from 1-5.
  • At least one of Ri and R 2 is alkyl, unsubstituted or substituted with halo-. In another example, both Ri and R 2 are independently alkyl, unsubstituted or substituted with halo-. In some embodiments, at least one of Ri and R 2 is methyl. In other embodiments, Ri and R 2 are methyl.
  • x+y+z is at least 3. In other embodiments of the invention, x+y+z is 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10.
  • Each occurrence of A, B, C, D or E in a macrocycle or macrocycle precursor of the invention is independently selected.
  • a sequence represented by the formula [A] x when x is 3, encompasses embodiments where the amino acids are not identical, e.g. Gin-Asp-Ala as well as embodiments where the amino acids are identical, e.g. Gln-Gln- Gln. This applies for any value of x, y, or z in the indicated ranges.
  • the peptidomimetic macrocycle disclosed herein comprises a secondary structure which is an a-helix and R 8 is -H, allowing intrahelical hydrogen bonding.
  • at least one of A, B, C, D or E is an ⁇ , ⁇ -disubstituted amino acid.
  • B is an ⁇ , ⁇ -disubstituted amino acid.
  • at least one of A, B, C, D or E is 2- I
  • At least one of A, B, C, D or E is 3 ⁇ 4 ? .
  • the length of the macrocycle-forming linker L as measured from a first Ca to a second Ca is selected to stabilize a desired secondary peptide structure, such as an a-helix formed by residues of the peptidomimetic macrocycle including, but not necessarily limited to, those between the first Ca to a second Ca.
  • the invention provides peptidomimetic macrocycles of Formula (III):
  • each A, C, D, and E is independently a natural or non-natural amino acid
  • B is a natural or non-natural amino acid, amino acid analog, O , [-NH-L4-CO-],
  • R and R 2 are independently -H, alkyl, alkenyl, alkynyl, arylalkyl, cycloalkyl, cycloalkylalkyl, heteroalkyl, or heterocycloalkyl, unsubstituted or substituted with halo-;
  • R 3 is hydrogen, alkyl, alkenyl, alkynyl, arylalkyl, heteroalkyl, cycloalkyl, heterocycloalkyl, cycloalkylalkyl, cycloaryl, or heterocycloaryl, unsubstituted or substituted with R 5 ;
  • Li, L 2 , L 3 and L 4 are independently alkylene, alkenylene, alkynylene, heteroalkylene, cycloalkylene, heterocycloalkylene, cycloarylene, heterocycloarylene or [-R 4 -K-R4-]n, each being unsubstituted or substituted with R 5 ;
  • K is O, S, SO, S0 2 , CO, C0 2 , or CONR 3 ;
  • each R4 is alkylene, alkenylene, alkynylene, heteroalkylene, cycloalkylene, heterocycloalkylene, arylene, or heteroarylene;
  • each R 5 is independently halogen, alkyl, -OR 6 , -N(R 6 ) 2 , -SR 6 , -SOR 6 , -S0 2 R 6 , -C0 2 R 6 , a fluorescent moiety, a radioisotope or a therapeutic agent;
  • each R6 is independently -H, alkyl, alkenyl, alkynyl, arylalkyl, cycloalkylalkyl, heterocycloalkyl, a fluorescent moiety, a radioisotope or a therapeutic agent;
  • R 7 is -H, alkyl, alkenyl, alkynyl, arylalkyl, cycloalkyl, heteroalkyl, cycloalkylalkyl,
  • heterocycloalkyl cycloaryl, or heterocycloaryl, unsubstituted or substituted with R 5 or part of a cyclic structure with a D residue;
  • R 8 is -H, alkyl, alkenyl, alkynyl, arylalkyl, cycloalkyl, heteroalkyl, cycloalkylalkyl,
  • heterocycloalkyl cycloaryl, or heterocycloaryl, unsubstituted or substituted with R 5 or part of a cyclic structure with an E residue;
  • v and w are independently integers from 1-1000;
  • u, x, y and z are independently integers from 0-10; and n is an integer from 1 -5.
  • At least one of Ri and R 2 is alkyl, unsubstituted or substituted with halo-. In another example, both Ri and R 2 are independently alkyl, unsubstituted or substituted with halo-. In some embodiments, at least one of Ri and R 2 is methyl. In other embodiments, Ri and R 2 are methyl.
  • x+y+z is at least 3. In other embodiments of the invention, x+y+z is 3, 4, 5, 6, 7, 8, 9 or 10.
  • Each occurrence of A, B, C, D or E in a macrocycle or macrocycle precursor of the invention is independently selected.
  • a sequence represented by the formula [A] x when x is 3, encompasses embodiments where the amino acids are not identical, e.g. Gln- Asp-Ala as well as embodiments where the amino acids are identical, e.g. Gln-Gln-Gln. This applies for any value of x, y, or z in the indicated ranges.
  • the peptidomimetic macrocycle disclosed herein comprises a secondary structure which is an a-helix and Rg is -H, allowing intrahelical hydrogen bonding.
  • at least one of A, B, C, D or E is an ⁇ , ⁇ -disubstituted amino acid.
  • B is an ⁇ , ⁇ -disubstituted amino acid.
  • at least one of A, B, C, D or E is 2- I
  • At least one of A, B, C, D or E is 3 ⁇ 4 ⁇ .
  • the length of the macrocycle-forming linker [-L r S-L 2 -S-L 3 -] as measured from a first Ca to a second Ca is selected to stabilize a desired secondary peptide structure, such as an a-helix formed by residues of the peptidomimetic macrocycle including, but not necessarily limited to, those between the first Ca to a second Ca.
  • Macrocycles or macrocycle precursors are synthesized, for example, by solution phase or solid- phase methods, and can contain both naturally-occurring and non-naturally-occurring amino acids. See, for example, Hunt, "The Non-Protein Amino Acids” in Chemistry and Biochemistry of the Amino Acids, edited by G.C. Barrett, Chapman and Hall, 1985.
  • the thiol moieties are the side chains of the amino acid residues L-cysteine, D-cysteine, a-methyl-L cysteine, a-methyl-D-cysteine, L-homocysteine, D-homocysteine, a-methyl-L-homocysteine or a-methyl-D-homocysteine.
  • a bis -alkylating reagent is of the general formula X-L 2 -Y wherein L 2 is a linker moiety and X and Y are leaving groups that are displaced by -SH moieties to form bonds with L 2 .
  • X and Y are halogens such as I, Br, or CI.
  • D and/or E in the compound of Formula I, II or III are further modified in order to facilitate cellular uptake.
  • peptidomimetic macrocycle facilitates cellular uptake, increases bioavailability, increases blood circulation, alters pharmacokinetics, decreases immunogenicity and/or decreases the needed frequency of administration.
  • a peptidomimetic macrocycle represents a moiety comprising an additional macrocycle-forming linker such that the peptidomimetic macrocycle comprises at least two macrocycle-forming linkers.
  • a peptidomimetic macrocycle comprises two macrocycle-forming linkers.
  • any of the macrocycle-forming linkers described herein may be used in any combination with any of the sequences shown in Tables 1 -3 and also with any of the R- substituents indicated herein.
  • the peptidomimetic macrocycle comprises at least one a-helix motif.
  • A, B and/or C in the compound of Formula I, II or III include one or more a-helices.
  • a-helices include between 3 and 4 amino acid residues per turn.
  • the a-helix of the peptidomimetic macrocycle includes 1 to 5 turns and, therefore,
  • the a-helix includes 1 turn, 2 turns, 3 turns,
  • the macrocycle-forming linker stabilizes an a-helix motif included within the peptidomimetic macrocycle.
  • the length of the macrocycle-forming linker L from a first Ca to a second Ca is selected to increase the stability of an a-helix.
  • the macrocycle-forming linker spans from 1 turn to
  • the macrocycle-forming linker spans approximately 1 turn, 2 turns, 3 turns, 4 turns, or 5 turns of the a-helix. In some embodiments, the length of the macrocycle-forming linker is approximately 5 A to 9 A per turn of the a-helix, or approximately
  • the length is equal to approximately 5 carbon-carbon bonds to 13 carbon- carbon bonds, approximately 7 carbon-carbon bonds to 1 1 carbon-carbon bonds, or
  • the length is equal to approximately 8 carbon-carbon bonds to 16 carbon-carbon bonds, approximately 10 carbon-carbon bonds to 14 carbon-carbon bonds, or approximately 12 carbon-carbon bonds.
  • the macrocycle-forming linker spans approximately 3 turns of an a-helix, the length is equal to approximately 14 carbon-carbon bonds to 22 carbon-carbon bonds, approximately 16 carbon-carbon bonds to 20 carbon-carbon bonds, or approximately 18 carbon-carbon bonds.
  • the macrocycle-forming linker spans approximately 4 turns of an a-helix, the length is equal to approximately 20 carbon-carbon bonds to 28 carbon-carbon bonds, approximately 22 carbon-carbon bonds to 26 carbon-carbon bonds, or approximately 24 carbon-carbon bonds.
  • the length is equal to approximately 26 carbon-carbon bonds to 34 carbon-carbon bonds, approximately 28 carbon-carbon bonds to 32 carbon-carbon bonds, or approximately 30 carbon-carbon bonds.
  • the linkage contains approximately 4 atoms to 12 atoms, approximately 6 atoms to 10 atoms, or approximately 8 atoms.
  • the linkage contains approximately 7 atoms to 15 atoms, approximately 9 atoms to 13 atoms, or approximately 1 1 atoms.
  • the linkage contains approximately 13 atoms to 21 atoms, approximately 15 atoms to 19 atoms, or approximately 17 atoms.
  • the linkage contains approximately 19 atoms to 27 atoms, approximately 21 atoms to 25 atoms, or approximately 23 atoms.
  • the linkage contains approximately 25 atoms to 33 atoms, approximately 27 atoms to 31 atoms, or approximately 29 atoms.
  • the resulting macrocycle forms a ring containing approximately 17 members to 25 members, approximately 19 members to 23 members, or approximately 21 members.
  • the resulting macrocycle forms a ring containing approximately 29 members to 37 members, approximately 31 members to 35 members, or approximately 33 members.
  • the resulting macrocycle forms a ring containing approximately 44 members to 52 members, approximately 46 members to 50 members, or approximately 48 members.
  • the resulting macrocycle forms a ring containing approximately 59 members to 67 members, approximately 61 members to 65 members, or approximately 63 members.
  • the macrocycle-forming linker spans approximately 5 turns of the a-helix, the resulting macrocycle forms a ring containing approximately 74 members to 82 members, approximately 76 members to 80 members, or approximately 78 members.
  • the invention provides peptidomimetic macrocycles of Formula (IV) or
  • each A, C, D, and E is independently a natural or non-natural amino acid;
  • B is a natural or non-natural amino acid, amino acid analog, [-NH-L3-CO-],
  • R and R 2 are independently -H, alkyl, alkenyl, alkynyl, arylalkyl, cycloalkyl, cycloalkylalkyl, heteroalkyl, or heterocycloalkyl, unsubstituted or substituted with halo-, or part of a cyclic structure with an E residue;
  • R 3 is hydrogen, alkyl, alkenyl, alkynyl, arylalkyl, heteroalkyl, cycloalkyl, heterocycloalkyl, cycloalkylalkyl, cycloaryl, or heterocycloaryl, optionally substituted with R 5 ;
  • L is a macrocycle-forming linker of the formula -L 1 -L 2 -;
  • Li and L 2 are independently alkylene, alkenylene, alkynylene, heteroalkylene, cycloalkylene, heterocycloalkylene, cycloarylene, heterocycloarylene, or [-R 4 -K-R4-] n , each being optionally substituted with R 5 ;
  • each R4 is alkylene, alkenylene, alkynylene, heteroalkylene, cycloalkylene, heterocycloalkylene, arylene, or heteroarylene;
  • each K is O, S, SO, S0 2 , CO, C0 2 , or CONR 3 ;
  • each R 5 is independently halogen, alkyl, -OR 6 , -N(R 6 ) 2 , -SR 6 , -SOR 6 , -S0 2 R 6 , -C0 2 R 6 , a fluorescent moiety, a radioisotope or a therapeutic agent;
  • each R6 is independently -H, alkyl, alkenyl, alkynyl, arylalkyl, cycloalkylalkyl, heterocycloalkyl, a fluorescent moiety, a radioisotope or a therapeutic agent;
  • R 7 is -H, alkyl, alkenyl, alkynyl, arylalkyl, cycloalkyl, heteroalkyl, cycloalkylalkyl,
  • heterocycloalkyl cycloaryl, or heterocycloaryl, optionally substituted with R 5 ;
  • v and w are independently integers from 1-1000;
  • u, x, y and z are independently integers from 0-10;
  • n is an integer from 1-5.
  • At least one of Ri and R 2 is alkyl, unsubstituted or substituted with halo-. In another example, both Ri and R 2 are independently alkyl, unsubstituted or substituted with halo-. In some embodiments, at least one of Ri and R 2 is methyl. In other embodiments, Ri and R 2 are methyl.
  • x+y+z is at least 1. In other embodiments of the invention, x+y+z is at least 2. In other embodiments of the invention, x+y+z is 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10.
  • Each occurrence of A, B, C, D or E in a macrocycle or macrocycle precursor of the invention is independently selected.
  • a sequence represented by the formula [A] x when x is 3, encompasses embodiments where the amino acids are not identical, e.g. Gin-Asp-Ala as well as embodiments where the amino acids are identical, e.g. Gln-Gln-Gln. This applies for any value of x, y, or z in the indicated ranges.
  • the peptidomimetic macrocycle disclosed herein comprises a secondary structure which is an a-helix and Rg is -H, allowing intrahelical hydrogen bonding.
  • at least one of A, B, C, D or E is an ⁇ , ⁇ -disubstituted amino acid.
  • B is an ⁇ , ⁇ -disubstituted amino acid.
  • at least one of A, B, C, D or E is 2-
  • the length of the macrocycle-forming linker L as measured from a first Ca to a second Ca is selected to stabilize a desired secondary peptide structure, such as an a-helix formed by residues of the peptidomimetic macrocycle including, but not necessarily limited to, those between the first Ca to a second Ca.
  • R H, alkyl, other substituent
  • Peptidomimetic macrocycles disclosed herein may be prepared by any of a variety of methods known in the art. For example, any of the residues indicated by "X" in Tables 1, 2 or 3 may be substituted with a residue capable of forming a crosslinker with a second residue in the same molecule or a precursor of such a residue.
  • the "S5 -olefin amino acid” is (S)-a-(2'-pentenyl) alanine and the "R8 olefin amino acid” is (R)-a-(2'-octenyl) alanine.
  • the terminal olefins are reacted with a metathesis catalyst, leading to the formation of the peptidomimetic macrocycle.
  • the following amino acids may be employed in the synthesis of the
  • x+y+z is 3, and and A, B and C are independently natural or non-natural amino acids. In other embodiments, x+y+z is 6, and and A, B and C are independently natural or non-natural amino acids.
  • the contacting step is performed in a solvent selected from the group consisting of protic solvent, aqueous solvent, organic solvent, and mixtures thereof.
  • the solvent may be chosen from the group consisting of H 2 0, THF, THF/H 2 0, tBuOH/H 2 0, DMF, DIPEA, CH 3 CN or CH 2 C1 2 , C1CH 2 CH 2 C1 or a mixture thereof.
  • the solvent may be a solvent which favors helix formation.
  • peptidomimetic macrocycles disclosed herein are made, for example, by chemical synthesis methods, such as described in Fields et ah, Chapter 3 in Synthetic Peptides: A User's Guide, ed. Grant, W. H. Freeman & Co., New York, N. Y., 1992, p. 77.
  • peptides are synthesized using the automated Merrifield techniques of solid phase synthesis with the amine protected by either tBoc or Fmoc chemistry using side chain protected amino acids on, for example, an automated peptide synthesizer (e.g., Applied Biosystems (Foster City, CA), Model 430A, 431 , or 433).
  • SPPS solid phase peptide synthesis
  • peptidomimetic precursors are produced, for example, by conjoining individual synthetic peptides using native chemical ligation. Alternatively, the longer synthetic peptides are biosynthesized by well known recombinant DNA and protein expression techniques. Such techniques are provided in well-known standard manuals with detailed protocols.
  • To construct a gene encoding a peptidomimetic precursor of this invention the amino acid sequence is reverse translated to obtain a nucleic acid sequence encoding the amino acid sequence, preferably with codons that are optimum for the organism in which the gene is to be expressed.
  • a synthetic gene is made, typically by synthesizing oligonucleotides which encode the peptide and any regulatory elements, if necessary.
  • the synthetic gene is inserted in a suitable cloning vector and transfected into a host cell. The peptide is then expressed under suitable conditions appropriate for the selected expression system and host.
  • the peptide is purified and characterized by standard methods.
  • the peptidomimetic precursors are made, for example, in a high-throughput, combinatorial fashion using, for example, a high-throughput polychannel combinatorial synthesizer ⁇ e.g. , Thuramed TETRAS multichannel peptide synthesizer from CreoSalus, Louisville, KY or Model Apex 396 multichannel peptide synthesizer from AAPPTEC, Inc., Louisville, KY).
  • a high-throughput polychannel combinatorial synthesizer ⁇ e.g. , Thuramed TETRAS multichannel peptide synthesizer from CreoSalus, Louisville, KY or Model Apex 396 multichannel peptide synthesizer from AAPPTEC, Inc., Louisville, KY).
  • the peptidomimetic macrocyles of the invention are of Formula II.
  • the synthesis of such peptidomimetic macrocycles involves a multi-step process that features the synthesis of a peptidomimetic precursor containing an azide moiety and an alkyne moiety; followed by contacting the peptidomimetic precursor with a macrocyclization reagent to generate a triazole-linked peptidomimetic macrocycle.
  • a multi-step process that features the synthesis of a peptidomimetic precursor containing an azide moiety and an alkyne moiety; followed by contacting the peptidomimetic precursor with a macrocyclization reagent to generate a triazole-linked peptidomimetic macrocycle.
  • Macrocycles or macrocycle precursors are synthesized, for example, by solution phase or solid-phase methods, and can contain both naturally-occurring and non-naturally-occurring amino acids. See, for example, Hunt, "The Non-Protein Amino Acids” in Chemistry and Biochemistry of the Amino Acids, edited by G.C. Barrett, Chapman and Hall, 1985.
  • an azide is linked to the a-carbon of a residue and an alkyne is attached to the ⁇ -carbon of another residue.
  • the azide moieties are azido-analogs of amino acids L-lysine, D-lysine, alpha-methyl-L-lysine, alpha-methyl-D-lysine, L-ornithine, D- ornithine, alpha-methyl-L-ornithine or alpha-methyl-D-ornithine.
  • the alkyne moiety is L-propargylglycine.
  • the alkyne moiety is an amino acid selected from the group consisting of L-propargylglycine, D-propargylglycine, (S)-2-amino- 2-methyl-4-pentynoic acid, (R)-2-amino-2-methyl-4-pentynoic acid, (S)-2-amino-2-methyl-5- hexynoic acid, (R)-2-amino-2-methyl-5-hexynoic acid, (S)-2-amino-2-methyl-6-heptynoic acid, (R)-2-amino-2-methyl-6-heptynoic acid, (S)-2-amino-2-methyl-7-octynoic acid, (R)-2-amino-2- methyl-7-octynoic acid, (S)-2-amino-2-methyl-8-nonynoic acid and (R)-2-amino-2-methyl-8- nonynoic acid.
  • the invention provides a method for synthesizing a peptidomimetic
  • R 12 is -H when the macrocyclization reagent is a Cu reagent and Ri 2 is -H or alkyl when the
  • macrocyclization reagent is a Ru reagent; and further wherein said contacting step results in a covalent linkage being formed between the alkyne and azide moiety in Formula V or Formula VI.
  • Ri 2 may be methyl when the macrocyclization reagent is a Ru reagent.
  • Ri and R 2 is alkyl, alkenyl, alkynyl, arylalkyl, cycloalkyl, cycloalkylalkyl, heteroalkyl, or heterocycloalkyl, unsubstituted or substituted with halo-.
  • both Ri and R 2 are independently alkyl, alkenyl, alkynyl, arylalkyl, cycloalkyl, cycloalkylalkyl, heteroalkyl, or heterocycloalkyl, unsubstituted or substituted with halo-.
  • At least one of A, B, C, D or E is an ⁇ , ⁇ - disubstituted amino acid.
  • B is an ⁇ , ⁇ -disubstituted amino acid.
  • at least one of A, B, C, D or E is 2-aminoisobutyric acid.
  • Ri and R 2 is alkyl, unsubstituted or substituted with halo-. In another example, both Ri and R 2 are independently alkyl, unsubstituted or substituted with halo-. In some embodiments, at least one of Ri and R 2 is methyl. In other embodiments, Ri and R 2 are methyl.
  • the macrocyclization reagent may be a Cu reagent or a Ru reagent.
  • the peptidomimetic precursor is purified prior to the contacting step.
  • the peptidomimetic macrocycle is purified after the contacting step.
  • the peptidomimetic macrocycle is refolded after the contacting step.
  • the method may be performed in solution, or, alternatively, the method may be performed on a solid support.
  • Also envisioned herein is performing the method of the invention in the presence of a target macromolecule that binds to the peptidomimetic precursor or peptidomimetic macrocycle under conditions that favor said binding.
  • the method is performed in the presence of a target macromolecule that binds preferentially to the peptidomimetic precursor or peptidomimetic macrocycle under conditions that favor said binding.
  • the method may also be applied to synthesize a library of peptidomimetic macrocycles.
  • the alkyne moiety of the peptidomimetic precursor of Formula V or Formula VI is a sidechain of an amino acid selected from the group consisting of L- propargylglycine, D-propargylglycine, (S)-2-amino-2-methyl-4-pentynoic acid, (R)-2-amino-2- methyl-4-pentynoic acid, (S)-2-amino-2-methyl-5-hexynoic acid, (R)-2-amino-2-methyl-5- hexynoic acid, (S)-2-amino-2-methyl-6-heptynoic acid, (R)-2-amino-2-methyl-6-heptynoic acid, (S)-2-amino-2-methyl-7-octynoic acid, (R)-2-amino-2-methyl-7-octynoic acid, (S)-2-amino-2- methyl-8-nonynoic acid, and (R)-2-amino-2-
  • the azide moiety of the peptidomimetic precursor of Formula V or Formula VI is a sidechain of an amino acid selected from the group consisting of ⁇ -azido-L-lysine, ⁇ -azido-D-lysine, ⁇ -azido-a- methyl-L-lysine, ⁇ -azido-a -methyl-D-lysine, ⁇ -azido-a-methyl-L-ornithine, and ⁇ -azido-a - methyl-D-ornithine.
  • x+y+z is 3, and and A, B and C are independently natural or non-natural amino acids. In other embodiments, x+y+z is 6, and and A, B and C are independently natural or non-natural amino acids.
  • each R b R 2 , R 7 and R 8 is -H; each Li is -(CH 2 )4-; and each L 2 is -(CH 2 )-.
  • R b R 2 , R 7 , R 8 , Li and L 2 can be independently selected from the various structures disclosed herein.
  • Synthetic Scheme 1 describes the preparation of several compounds of the invention. Ni(II) complexes of Schiff bases derived from the chiral auxiliary (S)-2-[N-(N'- benzylprolyl)amino]benzophenone (BPB) and amino acids such as glycine or alanine are prepared as described in Belokon et al. (1998), Tetrahedron Asymm. 9:4249-4252. The resulting complexes are subsequently reacted with alkylating reagents comprising an azido or alkynyl moiety to yield enantiomerically enriched compounds of the invention. If desired, the resulting compounds can be protected for use in peptide synthesis. [00130] Synthetic Scheme 2:
  • the peptidomimetic precursor contains an azide moiety and an alkyne moiety and is synthesized by solution-phase or solid-phase peptide synthesis (SPPS) using the commercially available amino acid N-a-Fmoc-L-propargylglycine and the N-a-Fmoc-protected forms of the amino acids (S)-2-amino-2-methyl-4-pentynoic acid, (S)-2-amino-6-heptynoic acid, (S)-2-amino- 2-methyl-6-heptynoic acid, N-methyl-s-azido-L-lysine, and N-methyl-s-azido-D-lysine.
  • SPPS solution-phase or solid-phase peptide synthesis
  • the peptidomimetic precursor is then deprotected and cleaved from the solid-phase resin by standard conditions (e.g., strong acid such as 95% TFA).
  • the peptidomimetic precursor is reacted as a crude mixture or is purified prior to reaction with a macrocyclization reagent such as a Cu(I) in organic or aqueous solutions (Rostovtsev et al. (2002), Angew. Chem. Int. Ed. 41 :2596-2599; Tornoe et al. (2002), J. Org. Chem. 67:3057-3064; Deiters et al. (2003), J. Am. Chem. Soc.
  • the triazole forming reaction is performed under conditions that favor a-helix formation.
  • the macrocyclization step is performed in a solvent chosen from the group consisting of H 2 0, THF, CH 3 CN, DMF , DIPEA, tBuOH or a mixture thereof.
  • the macrocyclization step is performed in DMF.
  • the macrocyclization step is performed in a buffered aqueous or partially aqueous solvent.
  • the peptidomimetic precursor contains an azide moiety and an alkyne moiety and is synthesized by solid-phase peptide synthesis (SPPS) using the commercially available amino acid N-a-Fmoc-L-propargylglycine and the N-a-Fmoc-protected forms of the amino acids (S)-2- amino-2-methyl-4-pentynoic acid, (S)-2-amino-6-heptynoic acid, (S)-2-amino-2-methyl-6- heptynoic acid, N-methyl-s-azido-L-lysine, and N-methyl-s-azido-D-lysine.
  • SPPS solid-phase peptide synthesis
  • the peptidomimetic precursor is reacted with a macrocyclization reagent such as a Cu(I) reagent on the resin as a crude mixture (Rostovtsev et al. (2002), Angew. Chem. Int. Ed. 41 :2596-2599; Tornoe et al. (2002), J. Org. Chem. 67:3057-3064; Deiters ei a/. (2003), J. Am. Chem. Soc. 125: 1 1782-1 1783; Punna ei fl/. (2005), Angew. Chem. Int. Ed. 44:2215-2220).
  • the resultant triazole-containing peptidomimetic macrocycle is then deprotected and cleaved from the solid-phase resin by standard conditions (e.g. , strong acid such as 95% TFA).
  • the a macrocyclization reagent such as a Cu(I) reagent
  • macrocyclization step is performed in a solvent chosen from the group consisting of CH 2 CI 2 , CICH 2 CH 2 CI, DMF, THF, NMP, DIPEA, 2,6-lutidine, pyridine, DMSO, H 2 0 or a mixture thereof.
  • the macrocyclization step is performed in a buffered aqueous or partially aqueous solvent.
  • the peptidomimetic precursor contains an azide moiety and an alkyne moiety and is synthesized by solution-phase or solid-phase peptide synthesis (SPPS) using the commercially available amino acid N-a-Fmoc-L-propargylglycine and the N-a-Fmoc-protected forms of the amino acids (S)-2-amino-2-methyl-4-pentynoic acid, (S)-2-amino-6-heptynoic acid, (S)-2-amino- 2-methyl-6-heptynoic acid, N-methyl-s-azido-L-lysine, and N-methyl-s-azido-D-lysine.
  • SPPS solution-phase or solid-phase peptide synthesis
  • the peptidomimetic precursor is then deprotected and cleaved from the solid-phase resin by standard conditions (e.g., strong acid such as 95% TFA).
  • the peptidomimetic precursor is reacted as a crude mixture or is purified prior to reaction with a macrocyclization reagent such as a Ru(II) reagents, for example Cp*RuCl(PPh 3 ) 2 or [Cp*RuCl] 4 (Rasmussen et al. (2007), Org. Lett. 9:5337-5339; Zhang et al. (2005), J. Am. Chem. Soc. 127: 15998-15999).
  • the macrocyclization step is performed in a solvent chosen from the group consisting of DMF, CH 3 CN and THF.
  • the peptidomimetic precursor contains an azide moiety and an alkyne moiety and is synthesized by solid-phase peptide synthesis (SPPS) using the commercially available amino acidN-a-Fmoc-L-propargylglycine and the N-a-Fmoc-protected forms of the amino acids (S)-2- amino-2-methyl-4-pentynoic acid, (S)-2-amino-6-heptynoic acid, (S)-2-amino-2-methyl-6- heptynoic acid, N-methyl-s-azido-L-lysine, and N-methyl-s-azido-D-lysine.
  • SPPS solid-phase peptide synthesis
  • the peptidomimetic precursor is reacted with a macrocyclization reagent such as a Ru(II) reagent on the resin as a crude mixture.
  • a macrocyclization reagent such as a Ru(II) reagent on the resin as a crude mixture.
  • the reagent can be Cp*RuCl(PPh 3 ) 2 or [Cp*RuCl]4 (Rasmussen et al. (2007), Org. Lett. 9:5337-5339; Zhang et al. (2005), J. Am. Chem. Soc. 127: 15998-15999).
  • the macrocyclization step is performed in a solvent chosen from the group consisting of CH 2 C1 2 , C1CH 2 CH 2 C1, CH 3 CN, DMF, and THF.
  • the present invention contemplates the use of non-naturally-occurring amino acids and amino acid analogs in the synthesis of the peptidomimetic macrocycles described herein.
  • Any amino acid or amino acid analog amenable to the synthetic methods employed for the synthesis of stable triazole containing peptidomimetic macrocycles can be used in the present invention.
  • L-propargylglycine is contemplated as a useful amino acid in the present invention.
  • other alkyne -containing amino acids that contain a different amino acid side chain are also useful in the invention.
  • L-propargylglycine contains one methylene unit between the a-carbon of the amino acid and the alkyne of the amino acid side chain.
  • the invention also contemplates the use of amino acids with multiple methylene units between the a- carbon and the alkyne.
  • the azido-analogs of amino acids L-lysine, D-lysine, alpha-methyl- L-lysine, and alpha-methyl-D-lysine are contemplated as useful amino acids in the present invention.
  • other terminal azide amino acids that contain a different amino acid side chain are also useful in the invention.
  • the azido-analog of L-lysine contains four methylene units between the ⁇ -carbon of the amino acid and the terminal azide of the amino acid side chain.
  • the invention also contemplates the use of amino acids with fewer than or greater than four methylene units between the ⁇ -carbon and the terminal azide. Table 4 shows some amino acids useful in the preparation of peptidomimetic macrocycles disclosed herein.
  • the amino acids and amino acid analogs are of the D -configuration. In other embodiments they are of the L-configuration. In some embodiments, some of the amino acids and amino acid analogs contained in the peptidomimetic are of the D-configuration while some of the amino acids and amino acid analogs are of the L-configuration. In some
  • the amino acid analogs are ⁇ , ⁇ -disubstituted, such as a-methyl-L-propargylglycine, a-methyl-D-propargylglycine, ⁇ -azido-alpha-methyl-L-lysine, and ⁇ -azido-alpha-methyl-D- lysine.
  • the amino acid analogs are N-alkylated, e.g., N-methyl-L- propargylglycine, N-methyl-D-propargylglycine, N-methyl-s-azido-L-lysine, and N-methyl- ⁇ - azido-D-lysine.
  • the -NH moiety of the amino acid is protected using a protecting group, including without limitation -Fmoc and -Boc.
  • the amino acid is not protected prior to synthesis of the peptidomimetic macrocycle.
  • peptidomimetic macrocycles of Formula III are synthesized.
  • the peptidomimetic precursor contains two -SH moieties and is synthesized by solid-phase peptide synthesis (SPPS) using commercially available N-a-Fmoc amino acids such as N-a-Fmoc-S-trityl-L -cysteine or N-a-Fmoc-S-trityl-D-cysteine.
  • SPPS solid-phase peptide synthesis
  • Alpha-methylated versions of D-cysteine or L-cysteine are generated by known methods (Seebach et al. (1996), Angew. Chem. Int. Ed. Engl.
  • N-a-Fmoc-S-trityl monomers by known methods ("Bioorganic Chemistry: Peptides and Proteins". Oxford University Press, New York: 1998, the entire contents of which are incorporated herein by reference).
  • the precursor peptidomimetic is then deprotected and cleaved from the solid-phase resin by standard conditions (e.g., strong acid such as 95% TFA).
  • the precursor peptidomimetic is reacted as a crude mixture or is purified prior to reaction with X-L 2 - Y in organic or aqueous solutions.
  • the alkylation reaction is performed under dilute conditions (i.e. 0.15 mmol/L) to favor macrocyclization and to avoid
  • the alkylation reaction is performed in organic solutions such as liquid NH 3 (Mosberg et al. (1985), J. AmChem. Soc. 107:2986-2987; Szewczuk et al. (1992), Int. J. Peptide Protein Res. 40 :233-242), NH 3 /MeOH, or NH 3 /DMF (Or et al. (1991), J. Org. Chem. 56:3146-3149).
  • the alkylation is performed in an aqueous solution such as 6M guanidinium HCL, pH 8 (Brunei et al. (2005), Chem. Commun. (20):2552- 2554).
  • the solvent used for the alkylation reaction is DMF or dichloroethane.
  • the precursor peptidomimetic contains two or more -SH moieties, of which two are specially protected to allow their selective deprotection and subsequent alkylation for macrocycle formation.
  • the precursor peptidomimetic is synthesized by solid-phase peptide synthesis (SPPS) using commercially available N-a-Fmoc amino acids such as N-a-Fmoc-S-p-methoxytrityl-L- cysteine or N-a-Fmoc-S-p-methoxytrityl-D-cysteine.
  • SPPS solid-phase peptide synthesis
  • Alpha-methylated versions of D-cysteine or L-cysteine are generated by known methods (Seebach et al. (1996), Angew. Chem. Int. Ed. Engl.
  • N-a- Fmoc-S-p-methoxytrityl monomers by known methods (Bioorganic Chemistry: Peptides and Proteins. Oxford University Press, New York: 1998, the entire contents of which are incorporated herein by reference).
  • the Mmt protecting groups of the peptidomimetic precursor are then selectively cleaved by standard conditions (e.g., mild acid such as 1% TFA in DCM).
  • the precursor peptidomimetic is then reacted on the resin with X-L 2 -Y in an organic solution. For example, the reaction takes place in the presence of a hindered base such as
  • the alkylation reaction is performed in organic solutions such as liquid NH 3 (Mosberg et al. (1985), J. Am.Chem. Soc. 107:2986-2987;
  • the peptidomimetic precursor contains two or more -SH moieties, of which two are specially protected to allow their selective deprotection and subsequent alkylation for macrocycle formation.
  • the peptidomimetic precursor is synthesized by solid-phase peptide synthesis (SPPS) using commercially available N-a-Fmoc amino acids such as N-a-Fmoc-S-p-methoxytrityl-L- cysteine, N-a-Fmoc-S-/ methoxytrityl-D-cysteine, N-a-Fmoc-S-S-t-butyl-L -cysteine, and N-a- Fmoc-S-S-t-butyl-D-cysteine.
  • SPPS solid-phase peptide synthesis
  • Alpha-methylated versions of D-cysteine or L-cysteine are generated by known methods (Seebach et al. (1996), Angew. Chem. Int. Ed. Engl. 35:2708-2748, and references therein) and then converted to the appropriately protected N-a-Fmoc-S-p- methoxytrityl or N-a-Fmoc-S-S-t-butyl monomers by known methods (Bioorganic Chemistry: Peptides and Proteins. Oxford University Press, New York: 1998, the entire contents of which are incorporated herein by reference).
  • the S-S-tButyl protecting group of the peptidomimetic precursor is selectively cleaved by known conditions (e.g.
  • the precursor peptidomimetic is then reacted on the resin with a molar excess of X-L 2 -Y in an organic solution.
  • a hindered base such as diisopropylethylamine.
  • the Mmt protecting group of the peptidomimetic precursor is then selectively cleaved by standard conditions (e.g., mild acid such as 1% TFA in DCM).
  • the peptidomimetic precursor is then cyclized on the resin by treatment with a hindered base in organic solutions.
  • the alkylation reaction is performed in organic solutions such as NH 3 /MeOH or NH 3 /DMF (Or et al. (1991), J. Org. Chem. 56:3146-3149).
  • organic solutions such as NH 3 /MeOH or NH 3 /DMF (Or et al. (1991), J. Org. Chem. 56:3146-3149).
  • the peptidomimetic macrocycle is then deprotected and cleaved from the solid-phase resin by standard conditions (e.g., strong acid such as 95% TFA).
  • the peptidomimetic precursor contains two L-cysteine moieties.
  • peptidomimetic precursor is synthesized by known biological expression systems in living cells or by known in vitro, cell-free, expression methods.
  • the precursor peptidomimetic is reacted as a crude mixture or is purified prior to reaction with X-L2-Y in organic or aqueous solutions.
  • the alkylation reaction is performed under dilute conditions (i.e. 0.15 mmol/L) to favor macrocyclization and to avoid polymerization.
  • the alkylation reaction is performed in organic solutions such as liquid NH 3 (Mosberg et al. (1985), J. Am. Chem. Soc. 107:2986-2987; Szewczuk et al. (1992), Int. J. Peptide Protein Res.
  • the alkylation is performed in an aqueous solution such as 6M guanidinium HCL, pH 8 (Brunei et al. (2005), Chem. Commun. (20):2552-2554).
  • the alkylation is performed in DMF or dichloroethane.
  • the alkylation is performed in non-denaturing aqueous solutions, and in yet another embodiment the alkylation is performed under conditions that favor a-helical structure formation.
  • the alkylation is performed under conditions that favor the binding of the precursor peptidomimetic to another protein, so as to induce the formation of the bound a-helical conformation during the alkylation.
  • X and Y are envisioned which are suitable for reacting with thiol groups.
  • each X or Y is independently be selected from the general category shown in Table 5.
  • X and Y are halides such as -CI, -Br or -I.
  • Any of the macrocycle- forming linkers described herein may be used in any combination with any of the sequences shown in Tables 1 -3 and also with any of the R- substituents indicated herein.
  • the present invention contemplates the use of both naturally-occurring and non-naturally- occurring amino acids and amino acid analogs in the synthesis of the peptidomimetic macrocycles of Formula (III).
  • Any amino acid or amino acid analog amenable to the synthetic methods employed for the synthesis of stable bis-sulfhydryl containing peptidomimetic macrocycles can be used in the present invention.
  • cysteine is contemplated as a useful amino acid in the present invention.
  • sulfur containing amino acids other than cysteine that contain a different amino acid side chain are also useful.
  • cysteine contains one methylene unit between the a-carbon of the amino acid and the terminal -SH of the amino acid side chain.
  • the invention also contemplates the use of amino acids with multiple methylene units between the a-carbon and the terminal -SH.
  • Non-limiting examples include a- methyl-L-homocysteine and a-methyl-D-homocysteine.
  • the amino acids and amino acid analogs are of the D- configuration. In other embodiments they are of the L- configuration.
  • some of the amino acids and amino acid analogs contained in the peptidomimetic are of the D- configuration while some of the amino acids and amino acid analogs are of the L- configuration.
  • the amino acid analogs are ⁇ , ⁇ - disubstituted, such as a-methyl-L-cysteine and a-methyl-D-cysteine.
  • the invention includes macrocycles in which macrocycle-forming linkers are used to link two or more -SH moieties in the peptidomimetic precursors to form the peptidomimetic macrocycles disclosed herein.
  • the macrocycle-forming linkers impart conformational rigidity, increased metabolic stability and/or increased cell penetrability.
  • the macrocycle-forming linkages stabilize the a-helical secondary structure of the peptidomimetic macrocyles.
  • the macrocycle-forming linkers are of the formula X-L 2 -Y, wherein both X and Y are the same or different moieties, as defined above.
  • Both X and Y have the chemical characteristics that allow one macrocycle-forming linker -L 2 - to bis alkylate the bis- sulfhydryl containing peptidomimetic precursor.
  • the linker -L 2 - includes alkylene, alkenylene, alkynylene, heteroalkylene, cycloalkylene, heterocycloalkylene, cycloarylene, or heterocycloarylene, or -R4-K-R4-, all of which can be optionally substituted with an R 5 group, as defined above.
  • one to three carbon atoms within the macrocycle-forming linkers -L 2 -, other than the carbons attached to the -SH of the sulfhydryl containing amino acid, are optionally substituted with a heteroatom such as N, S or O.
  • the L 2 component of the macrocycle-forming linker X-L 2 -Y may be varied in length depending on, among other things, the distance between the positions of the two amino acid analogs used to form the peptidomimetic macrocycle. Furthermore, as the lengths of Li and/or L 3 components of the macrocycle-forming linker are varied, the length of L 2 can also be varied in order to create a linker of appropriate overall length for forming a stable peptidomimetic macrocycle. For example, if the amino acid analogs used are varied by adding an additional methylene unit to each of Li and L 3 , the length of L 2 are decreased in length by the equivalent of approximately two methylene units to compensate for the increased lengths of Li and L 3 .
  • L 2 is an alkylene group of the formula -(CH 2 ) n -, where n is an integer between about 1 and about 15. For example, n is 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10. In other embodiments, L 2 is an alkenylene group. In still other embodiments, L 2 is an aryl group.
  • Table 6 shows additional embodiments of X-L 2 -Y groups.
  • the peptidomimetic macrocyles of the invention are of Formula IV or IVa.
  • Additional methods of forming peptidomimetic macrocycles which are envisioned as suitable to perform the present invention include those disclosed by Mustapa, M. Firouz Mohd et al., J. Org. Chem (2003), 68, pp. 8193-8198; Yang, Bin et al. Bioorg Med. Chem. Lett. (2004), 14, pp. 1403-1406; U.S. Patent No. 5,364,851 ; U.S. Patent No. 5,446,128; U.S. Patent No. 5,824,483; U.S. Patent No. 6,713,280; and U.S. Patent No. 7,202,332.
  • aminoacid precursors are used containing an additional substituent R- at the alpha position.
  • Such aminoacids are incorporated into the macrocycle precursor at the desired positions, which may be at the positions where the crosslinker is substituted or, alternatively, elsewhere in the sequence of the macrocycle precursor. Cyclization of the precursor is then effected according to the indicated method.
  • peptidomimetic macrocycles disclosed herein are assayed, for example, by using the methods described below.
  • a peptidomimetic macrocycle disclosed herein has improved biological properties relative to a corresponding polypeptide lacking the substituents described herein.
  • polypeptides with a-helical domains will reach a dynamic equilibrium between random coil structures and a-helical structures, often expressed as a "percent helicity".
  • alpha-helical domains are predominantly random coils in solution, with ⁇ -helical content usually under 25%.
  • Peptidomimetic macrocycles with optimized linkers possess, for example, an alpha-helicity that is at least two-fold greater than that of a corresponding uncrosslinked polypeptide.
  • macrocycles disclosed herein will possess an alpha-helicity of greater than 50%.
  • Circular dichroism (CD) spectra are obtained on a spectropolarimeter (e.g. , Jasco J- 710) using standard measurement parameters (e.g. temperature, 20°C; wavelength, 190-260 nm; step resolution, 0.5 nm; speed, 20 nm/sec; accumulations, 10; response, 1 sec; bandwidth, 1 nm; path length, 0.1 cm).
  • standard measurement parameters e.g. temperature, 20°C; wavelength, 190-260 nm; step resolution, 0.5 nm; speed, 20 nm/sec; accumulations, 10; response, 1 sec; bandwidth, 1 nm; path length, 0.1 cm.
  • the ⁇ -helical content of each peptide is calculated by dividing the mean residue ellipticity (e.g. [O]222obs) by the reported value for a model helical decapeptide (Yang et al. (1986), Methods Enzymol. 130:208)).
  • a peptidomimetic macrocycle disclosed herein comprising a secondary structure such as an a- helix exhibits, for example, a higher melting temperature than a corresponding uncrosslinked polypeptide.
  • peptidomimetic macrocycles disclosed herein exhibit Tm of > 60°C representing a highly stable structure in aqueous solutions.
  • Tm is determined by measuring the change in ellipticity over a temperature range (e.g. 4 to 95 °C) on a
  • spectropolarimeter ⁇ e.g. , Jasco J-710 using standard parameters (e.g. wavelength 222nm; step resolution, 0.5 nm; speed, 20 nm/sec; accumulations, 10; response, 1 sec; bandwidth, 1 nm; temperature increase rate: l °C/min; path length, 0.1 cm).
  • standard parameters e.g. wavelength 222nm; step resolution, 0.5 nm; speed, 20 nm/sec; accumulations, 10; response, 1 sec; bandwidth, 1 nm; temperature increase rate: l °C/min; path length, 0.1 cm.
  • the amide bond of the peptide backbone is susceptible to hydrolysis by proteases, thereby
  • the peptidomimetic macrocycles of the present invention may be subjected to in vitro trypsin proteolysis to assess for any change in degradation rate compared to a corresponding uncrosslinked polypeptide.
  • the peptidomimetic macrocycle and a corresponding uncrosslinked polypeptide are incubated with trypsin agarose and the reactions quenched at various time points by centrifugation and subsequent HPLC injection to quantitate the residual substrate by ultraviolet absorption at 280 nm.
  • the peptidomimetic macrocycle and peptidomimetic precursor (5 meg) are incubated with trypsin agarose (Pierce) (S/E -125) for 0, 10, 20, 90, and 180 minutes. Reactions are quenched by tabletop centrifugation at high speed; remaining substrate in the isolated supernatant is quantified by HPLC -based peak detection at 280 nm.
  • Peptidomimetic macrocycles with optimized linkers possess, for example, an ex vivo half-life that is at least two-fold greater than that of a corresponding uncrosslinked polypeptide, and possess an ex vivo half- life of 12 hours or more.
  • assays For ex vivo serum stability studies, a variety of assays may be used. For example, a peptidomimetic macrocycle and a corresponding uncrosslinked polypeptide (2 meg) are incubated with fresh mouse, rat and/or human serum (2 mL) at 37°C for 0, 1 , 2, 4, 8, and 24 hours. To determine the level of intact compound, the following procedure may be used: The samples are extracted by transferring 100 ⁇ of sera to 2 ml centrifuge tubes followed by the addition of 10 iL of 50 % formic acid and 500 ⁇ .
  • FPA fluorescence polarization assay
  • fluoresceinated peptidomimetic macrocycles 25 nM are incubated with the
  • Binding activity is measured, for example, by fluorescence polarization on a luminescence spectrophotometer (e.g. Perkin-Elmer LS50B). Kd values may be determined by nonlinear regression analysis using, for example, Graphpad Prism software (GraphPad Software, Inc., San Diego, CA).
  • a peptidomimetic macrocycle disclosed herein shows, in some instances, similar or lower Kd than a corresponding uncrosslinked polypeptide.
  • FPA fluorescence polarization assay
  • fluoresceinated peptidomimetic macrocycle derived from a peptidomimetic precursor sequence is used, for example.
  • the FPA technique measures the molecular orientation and mobility using polarized light and fluorescent tracer.
  • fluorescent tracers e.g., FITC
  • molecules with high apparent molecular weights e.g. FITC-labeled peptides bound to a large protein
  • fluorescent tracers attached to molecules with high apparent molecular weights e.g. FITC-labeled peptides bound to a large protein
  • fluorescent tracers e.g., FITC-labeled peptides bound to a large protein
  • a compound that antagonizes the interaction between the fluoresceinated peptidomimetic macrocycle and an acceptor protein will be detected in a competitive binding FPA experiment.
  • peptidomimetic macrocycle 25 nM are incubated with the acceptor protein (50 nM) in binding buffer (140mM NaCl, 50 mM Tris-HCL, pH 7.4) for 30 minutes at room temperature.
  • Antagonist binding activity is measured, for example, by fluorescence polarization on a luminescence spectrophotometer (e.g. Perkin-Elmer LS50B).
  • Kd values may be determined by nonlinear regression analysis using, for example, Graphpad Prism software (GraphPad Software, Inc., San Diego, CA).
  • Any class of molecule such as small organic molecules, peptides, oligonucleotides or proteins can be examined as putative antagonists in this assay.
  • an affinity-selection mass spectrometry assay is used, for example.
  • Protein-ligand binding experiments are conducted according to the following representative procedure outlined for a system-wide control experiment using 1 ⁇ peptidomimetic macrocycle plus 5 ⁇ hMDM2.
  • a 1 iL DMSO aliquot of a 40 ⁇ stock solution of peptidomimetic macrocycle is dissolved in 19 L of PBS (Phosphate -buffered saline: 50 mM, pH 7.5 Phosphate buffer containing 150 mM NaCl).
  • PBS Phosphate -buffered saline: 50 mM, pH 7.5 Phosphate buffer containing 150 mM NaCl.
  • the resulting solution is mixed by repeated pipetting and clarified by centrifugation at 10 OOOg for 10 min.
  • Protein-ligand K d titrations experiments are conducted as follows: 2 ⁇ DMSO aliquots of a serially diluted stock solution of titrant peptidomimetic macrocycle (5, 2.5, 0.098 mM) are prepared then dissolved in 38 ⁇ of PBS. The resulting solutions are mixed by repeated pipetting and clarified by centrifugation at 10 OOOg for 10 min. To 4.0 ⁇ aliquots of the resulting supematants is added 4.0 ⁇ of 10 ⁇ hMDM2 in PBS.
  • Each 8.0 ⁇ experimental sample thus contains 40 pmol (1.5 ⁇ g) of protein at 5.0 ⁇ concentration in PBS, varying concentrations (125, 62.5, 0.24 ⁇ ) of the titrant peptide, and 2.5% DMSO.
  • Duplicate samples thus prepared for each concentration point are incubated at room temperature for 30 min, then chilled to 4 °C prior to SEC-LC-MS analysis of 2.0 ⁇ injections.
  • selection mass spectrometry assay is performed, for example.
  • a mixture of ligands at 40 ⁇ per component is prepared by combining 2 ⁇ aliquots of 400 ⁇ stocks of each of the three compounds with 14 ⁇ of DMSO. Then, 1 ⁇ aliquots of this 40 ⁇ per component mixture are combined with 1 ⁇ DMSO aliquots of a serially diluted stock solution of titrant peptidomimetic macrocycle (10, 5, 2.5, 0.078 mM). These 2 ⁇ samples are dissolved in 38 ⁇ of PBS. The resulting solutions were mixed by repeated pipetting and clarified by centrifugation at 10 OOOg for 10 min.
  • each 8.0 ⁇ experimental sample thus contains 40 pmol (1.5 ⁇ g) of protein at 5.0 ⁇ concentration in PBS plus 0.5 ⁇ ligand, 2.5% DMSO, and varying concentrations (125, 62.5, 0.98 ⁇ ) of the titrant peptidomimetic macrocycle.
  • Duplicate samples thus prepared for each concentration point are incubated at room temperature for 60 min, then chilled to 4 °C prior to SEC-LC-MS analysis of 2.0 ⁇ injections.
  • Extracts are centrifuged at 14,000 rpm for 15 minutes and supernatants collected and incubated with 10 ⁇ goat anti-FITC antibody for 2 hrs, rotating at 4°C followed by further 2 hrs incubation at 4°C with protein A/G Sepharose (50 ⁇ of 50% bead slurry). After quick centrifugation, the pellets are washed in lysis buffer containing increasing salt concentration ⁇ e.g. , 150, 300, 500 mM). The beads are then re-equilibrated at 150 mM NaCl before addition of SDS-containing sample buffer and boiling.
  • the supernatants are optionally electrophoresed using 4%>-12%> gradient Bis-Tris gels followed by transfer into Immobilon-P membranes. After blocking, blots are optionally incubated with an antibody that detects FITC and also with one or more antibodies that detect proteins that bind to the peptidomimetic macrocycle.
  • a peptidomimetic macrocycle is, for example, more cell penetrable compared to a corresponding uncrosslinked macrocycle.
  • Peptidomimetic macrocycles with optimized linkers possess, for example, cell penetrability that is at least two-fold greater than a corresponding uncrosslinked macrocycle, and often 20% or more of the applied peptidomimetic macrocycle will be observed to have penetrated the cell after 4 hours.
  • To measure the cell penetrability of peptidomimetic macrocycles and corresponding uncrosslinked macrocycle intact cells are incubated with fluoresceinated peptidomimetic macrocycles or corresponding uncrosslinked macrocycle (10 ⁇ ) for 4 hrs in serum free media at 37°C, washed twice with media and incubated with trypsin (0.25%) for 10 min at 37°C. The cells are washed again and resuspended in PBS. Cellular fluorescence is analyzed, for example, by using either a FACSCalibur flow cytometer or Cellomics
  • the efficacy of certain peptidomimetic macrocycles is determined, for example, in cell-based killing assays using a variety of tumorigenic and non-tumorigenic cell lines and primary cells derived from human or mouse cell populations. Cell viability is monitored, for example, over 24- 96 hrs of incubation with peptidomimetic macrocycles (0.5 to 50 ⁇ ) to identify those that kill at EC50 ⁇ 10 ⁇ .
  • peptidomimetic macrocycles 0.5 to 50 ⁇
  • Several standard assays that measure cell viability are commercially available and are optionally used to assess the efficacy of the peptidomimetic macrocycles.
  • assays that measure Annexin V and caspase activation are optionally used to assess whether the peptidomimetic macrocycles kill cells by activating the apoptotic machinery.
  • the Cell Titer-glo assay is used which determines cell viability as a function of intracellular ATP concentration.
  • the compounds are, for example,administered to mice and/or rats by IV, IP, PO or inhalation routes at concentrations ranging from 0.1 to 50 mg/kg and blood specimens withdrawn at 0', 5', 15', 30', 1 hr, 4 hrs, 8 hrs and 24 hours post-injection. Levels of intact compound in 25 L of fresh serum are then measured by LC-MS/MS as above.
  • the compounds are, for example, given alone (IP, IV, PO, by inhalation or nasal routes) or in combination with sub-optimal doses of relevant chemotherapy (e.g., cyclophosphamide, doxorubicin, etoposide).
  • relevant chemotherapy e.g., cyclophosphamide, doxorubicin, etoposide.
  • 5 x 10 6 RS4;11 cells established from the bone marrow of a patient with acute lymphoblastic leukemia) that stably express luciferase are injected by tail vein in NOD-SCID mice 3 hrs after they have been subjected to total body irradiation.
  • mice If left untreated, this form of leukemia is fatal in 3 weeks in this model.
  • the leukemia is readily monitored, for example, by injecting the mice with D-luciferin (60 mg/kg) and imaging the anesthetized animals (e.g. , Xenogen In Vivo Imaging System, Caliper Life Sciences, Hopkinton, MA).
  • anesthetized animals e.g. , Xenogen In Vivo Imaging System, Caliper Life Sciences, Hopkinton, MA.
  • Total body bioluminescence is quantified by integration of photonic flux (photons/sec) by Living Image Software (Caliper Life Sciences, Hopkinton, MA).
  • Peptidomimetic macrocycles alone or in combination with sub-optimal doses of relevant chemotherapeutics agents are, for example, administered to leukemic mice (10 days after injection/day 1 of experiment, in bioluminescence range of 14-16) by tail vein or IP routes at doses ranging from 0.1 mg/kg to 50 mg/kg for 7 to 21 days.
  • the mice are imaged throughout the experiment every other day and survival monitored daily for the duration of the experiment.
  • Expired mice are optionally subjected to necropsy at the end of the experiment.
  • Another animal model is implantation into NOD-SCID mice of DoHH2, a cell line derived from human follicular lymphoma, that stably expresses luciferase. These in vivo tests optionally generate preliminary pharmacokinetic, pharmacodynamic and toxicology data.
  • peptidomimetic macrocycles disclosed herein for treatment of humans, clinical trials are performed. For example, patients diagnosed with cancer and in need of treatment are selected and separated in treatment and one or more control groups, wherein the treatment group is administered a peptidomimetic macrocycle, while the control groups receive a placebo or a known anti-cancer drug.
  • the treatment safety and efficacy of the peptidomimetic macrocycles disclosed herein can thus be evaluated by performing comparisons of the patient groups with respect to factors such as survival and quality-of-life.
  • the patient group treated with a peptidomimetic macrocyle show improved long-term survival compared to a patient control group treated with a placebo.
  • the peptidomimetic macrocycles disclosed herein also include pharmaceutically acceptable derivatives or prodrugs thereof.
  • a "pharmaceutically acceptable derivative” means any pharmaceutically acceptable salt, ester, salt of an ester, pro-drug or other derivative of a compound of this invention which, upon administration to a recipient, is capable of providing (directly or indirectly) a compound of this invention.
  • Particularly favored pharmaceutically acceptable derivatives are those that increase the bioavailability of the compounds of the invention when administered to a mammal (e.g. , by increasing absorption into the blood of an orally administered compound) or which increases delivery of the active compound to a biological compartment (e.g., the brain or lymphatic system) relative to the parent species.
  • Some pharmaceutically acceptable derivatives include a chemical group which increases aqueous solubility or active transport across the gastrointestinal mucosa.
  • the peptidomimetic macrocycles disclosed herein are modified by
  • Such modifications include those which increase biological penetration into a given biological compartment (e.g., blood, lymphatic system, central nervous system), increase oral availability, increase solubility to allow administration by injection, alter metabolism, and alter rate of excretion.
  • Pharmaceutically acceptable salts of the compounds of this invention include those derived from pharmaceutically acceptable inorganic and organic acids and bases.
  • suitable acid salts include acetate, adipate, benzoate, benzenesulfonate, butyrate, citrate, digluconate, dodecylsulfate, formate, fumarate, glycolate, hemisulfate, heptanoate, hexanoate, hydrochloride, hydrobromide, hydroiodide, lactate, maleate, malonate, methanesulfonate, 2- naphthalenesulfonate, nicotinate, nitrate, palmoate, phosphate, picrate, pivalate, propionate, salicylate, succinate, sulfate, tartrate, tosylate and undecanoate.
  • Salts derived from appropriate bases include alkali metal (e.g., sodium), alkaline earth metal (e.g., magnesium), ammonium
  • pharmaceutically acceptable carriers include either solid or liquid carriers.
  • Solid form preparations include powders, tablets, pills, capsules, cachets, suppositories, and dispersible granules.
  • a solid carrier can be one or more substances, which also acts as diluents, flavoring agents, binders, preservatives, tablet disintegrating agents, or an encapsulating material. Details on techniques for formulation and administration are well described in the scientific and patent literature, see, e.g., the latest edition of Remington's Pharmaceutical Sciences, Maack Publishing Co, Easton PA.
  • the carrier is a finely divided solid, which is in a mixture with the finely divided active component.
  • the active component is mixed with the carrier having the necessary binding properties in suitable proportions and compacted in the shape and size desired.
  • Suitable solid excipients are carbohydrate or protein fillers include, but are not limited to sugars, including lactose, sucrose, mannitol, or sorbitol; starch from corn, wheat, rice, potato, or other plants; cellulose such as methyl cellulose, hydroxypropylmethyl-cellulose, or sodium
  • Liquid form preparations include solutions, suspensions, and emulsions, for example, water or water/propylene glycol solutions. For parenteral injection, liquid preparations can be formulated in solution in aqueous polyethylene glycol solution.
  • the pharmaceutical preparation is preferably in unit dosage form.
  • the preparation is subdivided into unit doses containing appropriate quantities of the active component.
  • the unit dosage form can be a packaged preparation, the package containing discrete quantities of preparation, such as packeted tablets, capsules, and powders in vials or ampoules.
  • the unit dosage form can be a capsule, tablet, cachet, or lozenge itself, or it can be the appropriate number of any of these in packaged form.
  • compositions of this invention comprise a combination of a peptidomimetic
  • both the compound and the additional agent should be present at dosage levels of between about 1 to 100%, and more preferably between about 5 to 95% of the dosage normally administered in a monotherapy regimen.
  • the additional agents are administered separately, as part of a multiple dose regimen, from the compounds of this invention.
  • those agents are part of a single dosage form, mixed together with the compounds of this invention in a single composition.
  • the present invention provides novel peptidomimetic macrocycles that are useful in competitive binding assays to identify agents which bind to the natural ligand(s) of the proteins or peptides upon which the peptidomimetic macrocycles are modeled.
  • labeled peptidomimetic macrocycles based on survivin, borealin or INCENP can be used in a binding assay along with small molecules that competitively bind to the CPC assembly or sub-complexes thereof.
  • Competitive binding studies allow for rapid in vitro evaluation and determination of drug candidates specific for the CPC system. Such binding studies may be performed with any of the peptidomimetic macrocycles disclosed herein and their binding partners.
  • the invention further provides for the generation of antibodies against the peptidomimetic
  • these antibodies specifically bind both the peptidomimetic macrocycle and the precursor peptides, such as survivin, borealin and INCENP, to which the peptidomimetic macrocycles are related.
  • Such antibodies for example, disrupt the native protein- protein interactions, for example, in the CPC.
  • the present invention provides for both prophylactic and therapeutic methods of treating a subject at risk of (or susceptible to) a disorder or having a disorder associated with aberrant ⁇ e.g., insufficient or excessive) expression or activity of the molecules including survivin, borealin, INCENP or Aurora B kinase.
  • a disorder is caused, at least in part, by an abnormal level of survivin, borealin, INCENP or Aurora B kinase, (e.g., over or under expression), or by the presence of survivin, borealin, INCENP or Aurora B kinase exhibiting abnormal activity.
  • the reduction in the level and/or activity of survivin, borealin, INCENP or Aurora B kinase, or the enhancement of the level and/or activity of survivin, borealin, INCENP or Aurora B kinase, by peptidomimetic macrocycles derived from survivin, borealin or INCENP, is used, for example, to ameliorate or reduce the adverse symptoms of the disorder.
  • the present invention provides methods for treating or preventing a disease including hyperproliferative disease and inflammatory disorder by interfering with the interaction or binding between binding partners, for example, between survivin, borealin, INCENP and Aurora B kinase. These methods comprise administering an effective amount of a compound of the invention to a warm blooded animal, including a human. In some embodiments, the administration of the compounds of the present invention induces cell growth arrest or apoptosis.
  • treatment is defined as the application or administration of a
  • therapeutic agent to a patient, or application or administration of a therapeutic agent to an isolated tissue or cell line from a patient, who has a disease, a symptom of disease or a predisposition toward a disease, with the purpose to cure, heal, alleviate, relieve, alter, remedy, ameliorate, improve or affect the disease, the symptoms of disease or the predisposition toward disease.
  • the peptidomimetic macrocycles disclosed herein are used to treat,
  • cancer prevent, and/or diagnose cancers and neoplastic conditions.
  • cancer hyperproliferative and neoplastic refer to cells having the capacity for autonomous growth, i.e., an abnormal state or condition characterized by rapidly proliferating cell growth.
  • Hyperproliferative and neoplastic disease states may be categorized as pathologic, i.e., characterizing or constituting a disease state, or may be categorized as non-pathologic, i.e., a deviation from normal but not associated with a disease state.
  • pathologic i.e., characterizing or constituting a disease state
  • non-pathologic i.e., a deviation from normal but not associated with a disease state.
  • the term is meant to include all types of cancerous growths or oncogenic processes, metastatic tissues or malignantly
  • a metastatic tumor can arise from a multitude of primary tumor types, including but not limited to those of breast, lung, liver, colon and ovarian origin.
  • Primary tumor types including but not limited to those of breast, lung, liver, colon and ovarian origin.
  • "Pathologic hyperproliferative" cells occur in disease states characterized by malignant tumor growth.
  • non-pathologic hyperproliferative cells include proliferation of cells associated with wound repair.
  • Examples of cellular proliferative and/or differentiative disorders include cancer, e.g., carcinoma, sarcoma, or metastatic disorders.
  • the peptidomimetic macrocycles are novel therapeutic agents for controlling breast cancer, ovarian cancer, colon cancer, lung cancer, metastasis of such cancers and the like.
  • cancers or neoplastic conditions include, but are not limited to, a fibrosarcoma, myosarcoma, liposarcoma, chondrosarcoma, osteogenic sarcoma, chordoma, angiosarcoma, endotheliosarcoma, lymphangiosarcoma, lymphangioendotheliosarcoma, synovioma, mesothelioma, Ewing's tumor, leiomyosarcoma, rhabdomyosarcoma, gastric cancer, esophageal cancer, rectal cancer, pancreatic cancer, ovarian cancer, prostate cancer, uterine cancer, cancer of the head and neck, skin cancer, brain cancer, squamous cell carcinoma, sebaceous gland carcinoma, papillary carcinoma, papillary adenocarcinoma, cystadenocarcinoma, medullary carcinoma, bronchogenic carcinoma, renal cell carcinoma, hepatoma,
  • proliferative disorders include hematopoietic neoplastic disorders.
  • hematopoietic neoplastic disorders includes diseases involving hyperplastic/neoplastic cells of hematopoietic origin, e.g., arising from myeloid, lymphoid or erythroid lineages, or precursor cells thereof.
  • the diseases arise from poorly differentiated acute leukemias, e.g., erythroblastic leukemia and acute megakaryoblastic leukemia.
  • myeloid disorders include, but are not limited to, acute promyeloid leukemia (APML), acute myelogenous leukemia (AML) and chronic myelogenous leukemia (CML) (reviewed in Vaickus (1991), Crit Rev. Oncol. /Hemotol. 1 1 :267-97); lymphoid malignancies include, but are not limited to acute lymphoblastic leukemia (ALL) which includes B -lineage ALL and T-lineage ALL, chronic lymphocytic leukemia (CLL), prolymphocytic leukemia (PLL), hairy cell leukemia (HLL) and Waldenstrom's macroglobulinemia (WM).
  • ALL acute lymphoblastic leukemia
  • CLL chronic lymphocytic leukemia
  • PLL prolymphocytic leukemia
  • HLL hairy cell leukemia
  • WM Waldenstrom's macroglobulinemia
  • malignant lymphomas include, but are not limited to non-Hodgkin lymphoma and variants thereof, peripheral T cell lymphomas, adult T cell leukemia/lymphoma (ATL), cutaneous T-cell lymphoma (CTCL), large granular lymphocytic leukemia (LGF), Hodgkin's disease and Reed-Stemberg disease.
  • proliferative breast disease including, e.g. , epithelial hyperplasia, sclerosing adenosis, and small duct papillomas; tumors, e.g.
  • carcinoma of the breast including in situ (noninvasive) carcinoma that includes ductal carcinoma in situ (including Paget's disease) and lobular carcinoma in situ, and invasive (infiltrating) carcinoma including, but not limited to, invasive ductal carcinoma, invasive lobular carcinoma, medullary carcinoma, colloid (mucinous) carcinoma, tubular carcinoma, and invasive papillary carcinoma, and miscellaneous malignant neoplasms.
  • disorders in the male breast include, but are not limited to, gynecomastia and carcinoma.
  • Examples of cellular proliferative and/or differentiative disorders of the lung include, but are not limited to, bronchogenic carcinoma, including paraneoplastic syndromes, bronchioloalveolar carcinoma, neuroendocrine tumors, such as bronchial carcinoid, miscellaneous tumors, and metastatic tumors; pathologies of the pleura, including inflammatory pleural effusions, noninflammatory pleural effusions, pneumothorax, and pleural tumors, including solitary fibrous tumors (pleural fibroma) and malignant mesothelioma.
  • bronchogenic carcinoma including paraneoplastic syndromes, bronchioloalveolar carcinoma, neuroendocrine tumors, such as bronchial carcinoid, miscellaneous tumors, and metastatic tumors
  • pathologies of the pleura including inflammatory pleural effusions, noninflammatory pleural effusions, pneumothorax, and pleural tumors, including solitary fibrous tumors (pleural fibro
  • Examples of cellular proliferative and/or differentiative disorders of the colon include, but are not limited to, non-neoplastic polyps, adenomas, familial syndromes, colorectal carcinogenesis, colorectal carcinoma, and carcinoid tumors.
  • Examples of cellular proliferative and/or differentiative disorders of the liver include, but are not limited to, nodular hyperplasias, adenomas, and malignant tumors, including primary carcinoma of the liver and metastatic tumors.
  • Examples of cellular proliferative and/or differentiative disorders of the ovary include, but are not limited to, ovarian tumors such as, tumors of coelomic epithelium, serous tumors, mucinous tumors, endometrioid tumors, clear cell adenocarcinoma, cystadenofibroma, Brenner tumor, surface epithelial tumors; germ cell tumors such as mature (benign) teratomas, monodermal teratomas, immature malignant teratomas, dysgerminoma, endodermal sinus tumor,
  • choriocarcinoma sex cord-stomal tumors such as, granulosa-theca cell tumors, thecomafibromas, androblastomas, hill cell tumors, and gonadoblastoma; and metastatic tumors such as Krukenberg tumors.
  • the peptidomimetic macrocycles described herein are used to treat, prevent or diagnose conditions characterized by overactive cell death or cellular death due to physiologic insult, etc.
  • conditions characterized by premature or unwanted cell death are or alternatively unwanted or excessive cellular proliferation include, but are not limited to hypocellular/hypoplastic, acellular/aplastic, or hypercellular/hyperplastic conditions.
  • Some examples include hematologic disorders including but not limited to fanconi anemia, aplastic anemia, thalaessemia, congenital neutropenia, and myelodysplasia.
  • the peptidomimetic macrocycles disclosed herein that act to decrease apoptosis are used to treat disorders associated with an undesirable level of cell death.
  • the anti-apoptotic peptidomimetic macrocycles disclosed herein are used to treat disorders such as those that lead to cell death associated with viral infection, e.g., infection associated with infection with human immunodeficiency virus (HIV).
  • HIV human immunodeficiency virus
  • a wide variety of neurological diseases are characterized by the gradual loss of specific sets of neurons.
  • One example is Alzheimer's disease (AD). Alzheimer's disease is characterized by loss of neurons and synapses in the cerebral cortex and certain subcortical regions. This loss results in gross atrophy of the affected regions.
  • Alzheimer's disease has been identified as a protein misfolding disease, due to the accumulation of abnormally folded A-beta and tau proteins in the brain.
  • ⁇ -amyloid is a fragment from a larger protein called amyloid precursor protein (APP).
  • APP amyloid precursor protein
  • APP is critical to neuron growth, survival and post-injury repair.
  • AD amyloid precursor protein
  • an unknown process causes APP to be cleaved into smaller fragments by enzymes through proteolysis.
  • One of these fragments is fibrils of ⁇ -amyloid, which form clumps that deposit outside neurons in dense formations known as senile plaques. Plaques continue to grow into insoluble twisted fibers within the nerve cell, often called tangles. Disruption of the interaction between ⁇ -amyloid and its native receptor is therefore important in the treatment of AD.
  • the anti-apoptotic peptidomimetic macrocycles disclosed herein are used, in some embodiments, in the treatment of AD and other neurological disorders associated with cell apoptosis.
  • Such neurological disorders include Alzheimer's disease, Parkinson's disease, amyotrophic lateral sclerosis (ALS) retinitis pigmentosa, spinal muscular atrophy, and various forms of cerebellar degeneration.
  • ALS amyotrophic lateral sclerosis
  • the cell loss in these diseases does not induce an inflammatory response, and apoptosis appears to be the mechanism of cell death.
  • hematologic diseases are associated with a decreased production of blood cells. These disorders include anemia associated with chronic disease, aplastic anemia, chronic neutropenia, and the myelodysplastic syndromes. Disorders of blood cell production, such as myelodysplastic syndrome and some forms of aplastic anemia, are associated with increased apoptotic cell death within the bone marrow. These disorders could result from the activation of genes that promote apoptosis, acquired deficiencies in stromal cells or
  • hematopoietic survival factors or the direct effects of toxins and mediators of immune responses.
  • Two common disorders associated with cell death are myocardial infarctions and stroke. In both disorders, cells within the central area of ischemia, which is produced in the event of acute loss of blood flow, appear to die rapidly as a result of necrosis. However, outside the central ischemic zone, cells die over a more protracted time period and morphologically appear to die by apoptosis.
  • the anti-apoptotic peptidomimetic macrocycles disclosed herein are used to treat all such disorders associated with undesirable cell death.
  • neurologic disorders that are treated with the peptidomimetic macrocycles described herein include but are not limited to Alzheimer's Disease, Down's Syndrome, Dutch Type Hereditary Cerebral Hemorrhage Amyloidosis, Reactive Amyloidosis, Familial Amyloid Nephropathy with Urticaria and Deafness, Muckle-Wells Syndrome, Idiopathic Myeloma;
  • Macroglobulinemia-Associated Myeloma Familial Amyloid Polyneuropathy, Familial Amyloid Cardiomyopathy, Isolated Cardiac Amyloid, Systemic Senile Amyloidosis, Adult Onset
  • the peptidomimetic macrocycles described herein are used to treat, prevent or diagnose inflammatory disorders.
  • inflammatory disorders Numerous types of inflammatory disorders exist. Certain inflammatory diseases are associated with the immune system, for example, autoimmune diseases.
  • Autoimmune diseases arise from an overactive immune response of the body against substances and tissues normally present in the body, i.e. self antigens. In other words, the immune system attacks its own cells. Autoimmune diseases are a major cause of immune- mediated diseases.
  • Rheumatoid arthritis is an example of an autoimmune disease, in which the immune system attacks the joints, where it causes inflammation (i.e. arthritis) and destruction. It can also damage some organs, such as the lungs and skin. Rheumatoid arthritis can lead to substantial loss of functioning and mobility. Rheumatoid arthritis is diagnosed with blood tests especially the rheumatoid factor test.
  • autoimmune diseases that are treated with the peptidomimetic macrocycles described herein include, but are not limited to, acute disseminated encephalomyelitis (ADEM), Addison's disease, ankylosing spondylitis, antiphospholipid antibody syndrome (APS), autoimmune hemolytic anemia, autoimmune hepatitis, autoimmune inner ear disease, Bechet's disease, bullous pemphigoid, coeliac disease, Chagas disease, Churg-Strauss syndrome, chronic obstructive pulmonary disease (COPD), Crohn's disease, dermatomyositis, diabetes mellitus type I, endometriosis, Goodpasture's syndrome, Graves' disease, Guillain-Barre syndrome (GBS), Hashimoto's disease, Hidradenitis suppurativa, idiopathic thrombocytopenic purpura, inflammatory bowl disease (IBD), interstitial cystitis, lupus erythemato
  • Some examples of other types of inflammatory disorders that are treated with the peptidomimetic macrocycles described herein include, but are not limited to, allergy including allergic rhinitis/sinusitis, skin allergies (urticaria/hives, angioedema, atopic dermatitis), food allergies, drug allergies, insect allergies, and rare allergic disorders such as mastocytosis, asthma, arthritis including osteoarthritis, rheumatoid arthritis, and spondyloarthropathies, primary angitis of the CNS, sarcoidosis, organ transplant rejection, fibromyalgia, fibrosis, pancreatitis, and pelvic inflammatory disease.
  • cardiovascular disorders e.g., inflammatory disorders
  • cardiovascular disorders include, but are not limited to, aortic valve stenosis, atherosclerosis, myocardial infarction, stroke, thrombosis, aneurism, heart failure, ischemic heart disease, angina pectoris, sudden cardiac death, hypertensive heart disease; noncoronary vessel disease, such as arteriolosclerosis, small vessel disease, nephropathy, hypertriglyceridemia, hypercholesterolemia, hyperlipidemia, xanthomatosis, asthma, hypertension, emphysema and chronic pulmonary disease; or a cardiovascular condition associated with interventional procedures ("procedural vascular trauma"), such as restenosis following angioplasty, placement of a shunt, stent, synthetic or natural excision grafts, indwelling catheter, valve or other implantable devices.
  • Preferred cardiovascular disorders include atherosclerosis, myo
  • Peptidomimetic macrocycles were designed by replacing two or more naturally occurring amino acids with the corresponding synthetic amino acids. Substitutions were made at i and i+4, and i and i+7 positions. Peptide synthesis was performed either manually or on an automated peptide synthesizer (Applied Biosystems, model 433A), using solid phase conditions, rink amide AM resin (Novabiochem), and Fmoc main-chain protecting group chemistry.
  • Tables 7a and 7b shows a list of peptidomimetic macrocycles prepared. Table 7a
  • Nle represents norleucine
  • Aib represents 2-aminoisobutyric acid
  • Ba represents beta-alanine
  • Ac represents acetyl
  • -NH 2 " at the C terminal end of a peptide or peptidomimetic macrocycle represents an amide group
  • Pr represents propionyl.
  • Amino acids represented as “$” are alpha-Me S5-pentenyl-alanine olefin amino acids connected by an all-carbon i to i+4 crosslinker comprising one double bond.
  • Amino acids represented as "$r5" are alpha-Me R5-pentenyl- alanine olefin amino acids connected by an all-carbon i to i+4 crosslinker comprising one double bond.
  • Amino acids represented as "$s8" are alpha-Me S8-octenyl-alanine olefin amino acids connected by an all-carbon i to i+7 crosslinker comprising one double bond.
  • Amino acids represented as “$r8” are alpha-Me R8-octenyl-alanine olefin amino acids connected by an all- carbon i to i+7 crosslinker comprising one double bond.
  • “Ahx” represents an aminocyclohexyl linker.
  • the crosslinkers are linear all-carbon crosslinker comprising eight or eleven carbon atoms between the alpha carbons of each amino acid.
  • Amino acids represented as "$/” are alpha-Me S5- pentenyl-alanine olefin amino acids that are not connected by any crosslinker.
  • Amino acids represented as "$/r5" are alpha-Me R5-pentenyl-alanine olefin amino acids that are not connected by any crosslinker.
  • Amino acids represented as "$/s8" are alpha-Me S8-octenyl- alanine olefin amino acids that are not connected by any crosslinker.
  • Amino acids represented as "$/r8" are alpha-Me R8-octenyl-alanine olefin amino acids that are not connected by any crosslinker.
  • Amino acids represented as “Amw” are alpha-Me tryptophan amino acids.
  • Amino acids represented as “Ami” are alpha-Me leucine amino acids.
  • Amino acids represented as "2ff ' are 2-fluoro-phenylalanine amino acids.
  • Amino acids represented as "3ff ' are 3 -fluoro- phenylalanine amino acids.
  • Amino acids represented as "St” are amino acids comprising two pentenyl-alanine olefin side chains, each of which is crosslinked to another amino acid as indicated.
  • Amino acids represented as "St//” are amino acids comprising two pentenyl-alanine olefin side chains that are not crosslinked.
  • Amino acids represented as "%St” are amino acids comprising two pentenyl-alanine olefin side chains, each of which is crosslinked to another amino acid as indicated via fully saturated hydrocarbon crosslinks.

Abstract

La présente invention concerne de nouveaux macrocycles peptidomimétiques et des procédés d'utilisation de tels macrocycles dans le traitement de maladies.
PCT/US2012/041181 2011-06-06 2012-06-06 Macrocycles peptidomimétiques WO2012173846A2 (fr)

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