Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D487/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00
  • C07D487/12—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00 in which the condensed system contains three hetero rings
  • C07D487/16—Peri-condensed systems
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K31/00—Medicinal preparations containing organic active ingredients
  • A61K31/33—Heterocyclic compounds
  • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
  • A61K31/495—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with two or more nitrogen atoms as the only ring heteroatoms, e.g. piperazine or tetrazines
  • A61K31/505—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim
  • A61K31/519—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim ortho- or peri-condensed with heterocyclic rings
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K31/00—Medicinal preparations containing organic active ingredients
  • A61K31/33—Heterocyclic compounds
  • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
  • A61K31/53—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with three nitrogens as the only ring hetero atoms, e.g. chlorazanil, melamine
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P25/00—Drugs for disorders of the nervous system
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P25/00—Drugs for disorders of the nervous system
  • A61P25/28—Drugs for disorders of the nervous system for treating neurodegenerative disorders of the central nervous system, e.g. nootropic agents, cognition enhancers, drugs for treating Alzheimer's disease or other forms of dementia
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
  • A61P31/04—Antibacterial agents
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P35/00—Antineoplastic agents
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P37/00—Drugs for immunological or allergic disorders
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P37/00—Drugs for immunological or allergic disorders
  • A61P37/02—Immunomodulators
  • A61P37/06—Immunosuppressants, e.g. drugs for graft rejection
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00

Definitions

• PYRAZOLO (1 , 5-A) (1 , 3 , 5) TRIAZINE AND PYRAZOLO (1 , 5-A) PYRIMIDINE DERIVATIVES USEFUL AS PROTEIN KINASE INHIBITORS
• the present invention relates to chemical compounds that are useful, for example, as protein kinase inhibitors for treating cancer, neurological disorders, autoimmune disorders, and other diseases, and methods of using such compounds.
• CK2 an essential serine/threonine protein kinase, until recently has not been considered as a possible target in cancer chemotherapy, but a wide variety of cancers exhibit elevated levels of CK2 activity that correlate with the aggressiveness of tumor growth. Furthermore, decreasing CK2 activity, through use of small molecules, dominant negative overexpression of kinase inactive mutants, anti-sense methods, or small interfering RNAs, decreases cellular proliferation, increases the level of apoptosis in cancer cells, and eradicates the PC3 human prostate cancer cells from tumor-bearing mice.
• Existing C2 inhibitors such as emodin, coumarins, TBB (triazole), quinazolines, DRB and quercetin, however, while useful for laboratory studies, lack the qualities of a clinically useful chemotherapeutic agent.
• One aspect of the present invention provides a new class of protein kinase inhibitors based upon macrocyclic pyrazolo[l,5-a][l,3,5]triazine and pyrazolo[l,5-a]pyrimidine compounds, methods of using them, pharmaceutically acceptable prodrugs, pharmaceutically active metabolites, and pharmaceutically acceptable salts thereof.
• pharmaceutically acceptable prodrugs Such compounds, prodrugs, metabolites, polymorphs, and pharmaceutically acceptable salts thereof are collectively referred to as "agents.”
• the invention also relates to pharmaceutical compositions comprising an effective amount of an agent with one or more pharmaceutically acceptable carriers.
• inventive agents and pharmaceutical compositions containing such agents are useful in treating various diseases including but not limited to those associated with uncontrolled or un-wanted cellular proliferation such as cancer, autoimmune diseases, viral diseases, fungal diseases, neurodegenerative disorders and cardiovascular diseases.
• Preferred agents modulate and/or inhibit the activity of CK2 protein kinase.
• the pharmaceutical compositions containing such agents are useful in treating diseases mediated by kinase activity, such as cancer.
• the invention relates generally to compounds of Formula (I), as well as prodrugs, pharmaceutically active metabolites, polymorphs, and pharmaceutically acceptable salts thereof:
• Rl is alkyl, alkenyl, alkynyl, aryl, or heteroaryl.
• R2 is hydrogen, alkyl, alkenyl, alkynyl, aryl, or heteroaryl
• R3 groups are independently hydrogen, optionally substituted alkyl, alkenyl, alkynyl,aryl, heteroaryl, or halo:
• X is CH or N.
• the invention also relates to methods of treating proliferative diseases such as cancer, auto immune diseases, viral diseases, fungal diseases, neurodegenerative disorders and cardiovascular diseases, comprising administration of effective amounts of an agent of the invention to a subject in need of such treatment.
• proliferative diseases such as cancer, auto immune diseases, viral diseases, fungal diseases, neurodegenerative disorders and cardiovascular diseases.
• the invention further relates to methods of modulating and/or inhibiting the protein kinase activity of CK2 by administering a compound of Formula (I) or a pharmaceutically acceptable salt, pharmaceutically acceptable prodrug, or pharmaceutically acceptable salt of such compound or metabolite thereof.
• Alkyl refers to straight or branched hydrocarbon chains containing from 1 to 8 carbon atoms
• alkylene and “alkynyl” refer to the corresponding chains containing a double- or triple bond, respectively.
• Alkyl, alkylene, and alkynyl groups may be optionally substituted with one or more substituents selected from the group consisting of mercapto, nitro, cyano, azido and halo.
• Heteroaryl refers to 5- and 6-membered aromatic rings having one or more heteroatoms selected independently from N, O, and S.
• Rl is aryl, preferably substituted aryl, more preferably substituted phenyl.
• Rl is N- alkyl-N-alkylpyrrolidinyl-carbonyl-phenyl (e.g., N-methyl-N-(l -methyl -pyrrolidinyl)-carbonyl)- phenyl, as in compound Hg) or N-alkyl-N-alkylaminoalkyl (e.g., N-methyl-N-ethylaminoethyl, as in compound 11 s) are particularly useful.
• each R2 and R3 group is hydrogen
• (C) is alkyl
• n 4
• X is N.
• inventive agents may be prepared by synthetic schemes described below.
• Triazine-based compounds of Formula (I) for example, can be prepared according to Scheme 1:
• salts and/or solvates of compounds of the present invention may also be used.
• Such salts include those formed from, for example, hydrochloric, hydrobromic, sulfuric, phosphoric, nitric, fumaric, acetic, propionic, succinic, glycolic, maleic, tartaric, citric, malonic, and methanesulfonic acids.
• Certain compounds may include a chiral center, in which case each enantiomer as well as the corresponding racemate is encompassed in the present invention.
• the present invention also is directed to pharmaceutical formulations that include the inventive compounds, regardless of the intended mode of administration.
• Therapeutic dosages of compounds of the present inventions can be readily determined by methods well-known in the art.
• CK2 protein kinase activity was measured through use of a spectrophotometric PK/LDH coupled assay to detect ATP turnover.
• Full Length His-tagged Human CK2 was cloned, expressed, and purified from an E. coli expression system.
• the peptide substrate for CK2 phosphorylation was RRRDDDSDDD (Genscript Corporation, Piscataway, NJ, USA).
• a typical CK2 enzymatic assay contained ⁇ 20 nM human CK2, 100 ⁇ M peptide substrate, 50 mM Tris- HCl pH 8.0, 100 mM NaCl, 10 mM MgC12, 200 ⁇ M EDTA, 5 mM 2-mercaptoethanol, 1 mM phosphoenol pyruvate, 150 ⁇ M NADH, 0.5% PK/LDH Mix (Sigma #P-0294), 2.5% DMSO and 50 ⁇ M ATP. Inhibitor compounds were suspended in 100% DMSO and added to achieve various concentrations at a constant DMSO proportion of 2.5% by volume.
• CK2 enzyme Prior to the addition of ATP to initiate the phosphorylation reaction, CK2 enzyme was pre-incubated with inhibitors and other assay components for 5 min. Progress of the reaction was continuously monitored by the change in UV/Vis absorbance at 340 nm. Reaction rates were plotted versus inhibitor concentration and Ki values were fitted with the assumption of competitive inhibition and use of a Km value of 10 ⁇ M. In the case of very potent binding, tight-binding methods were employed to determine Ki. The results are recorded in Tables 1 and 2.
• HCT-116 and PC-3 cells were cultured at 37°C with 5% CO2 and in 10% fetal bovine serum with McCoy's 5 A modified medium and F- 12 K medium respectively.
• Cells were plated on 96 well plates at a density of 2,000-4,000/well in the volume of 100 ⁇ L medium. After overnight incubation, 50 ⁇ L more medium containing various amount of CK2 inhibitors were added into each well to give final inhibitor concentrations ranging from 0.01 to 20 ⁇ M in 1% dimethylsulfoxide.
• the control wells contained 1% dimethylsulfoxide only in their medium.

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• 2007
  • 2007-09-17 US US11/856,476 patent/US7517882B2/en not_active Expired - Fee Related
  • 2007-09-18 EP EP07838443A patent/EP2064214B1/en not_active Not-in-force
  • 2007-09-18 JP JP2009528344A patent/JP5232786B2/ja not_active Expired - Fee Related
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  • 2007-09-18 WO PCT/US2007/020231 patent/WO2008036277A1/en not_active Ceased
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• 2009
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