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  • C07D471/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
  • C07D471/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains two hetero rings
  • C07D471/04—Ortho-condensed systems
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  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
  • C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
  • C07D401/12—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings linked by a chain containing hetero atoms as chain links
• • 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
  • A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
  • A61K31/47—Quinolines; Isoquinolines
  • A61K31/4709—Non-condensed quinolines and containing further heterocyclic rings
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
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• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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  • A61P19/00—Drugs for skeletal disorders
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P19/00—Drugs for skeletal disorders
  • A61P19/02—Drugs for skeletal disorders for joint disorders, e.g. arthritis, arthrosis
• • 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
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  • A61P25/00—Drugs for disorders of the nervous system
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  • A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
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  • A61P35/00—Antineoplastic agents
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  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
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• • A—HUMAN NECESSITIES
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  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
  • C07D401/14—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing three or more hetero rings
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D403/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00
  • C07D403/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing two hetero rings
  • C07D403/12—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing two hetero rings linked by a chain containing hetero atoms as chain links
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D403/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00
  • C07D403/14—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing three or more hetero rings

Definitions

• the present invention relates to novel hydantoin derivatives, processes for their preparation, pharmaceutical compositions containing them and their use in therapy.
• Metalloproteinases are a superfamily of proteinases (enzymes) whose numbers in recent years have increased dramatically. Based on structural and functional considerations these enzymes have been classified into families and subfamilies as described in N.M. Hooper (1994) FEBS Letters 354:1-6.
• metalloproteinases examples include the matrix metalloproteinases (MMPs) such as the collagenases (MMPl, MMP8, MMP 13), the gelatinases (MMP2, MMP9), the stromelysins (MMP3, MMPlO, MMPIl), matrilysin (MMP7), metalloelastase (MMP 12), enamelysin (MMP 19), the MT-MMPs (MMP 14, MMP15, MMP16, MMP17); the reprolysin or adamalysin or MDC family which includes the secretases and sheddases such as TNF converting enzymes (ADAMlO and TACE); the astacin family which include enzymes such as procollagen processing proteinase (PCP); and other metalloproteinases such as aggrecanase, the endothelin converting enzyme family and the angiotensin converting enzyme family.
• MMPs matrix metalloproteinases
• Metalloproteinases are believed to be important in a plethora of physiological disease processes that involve tissue remodelling such as embryonic development, bone formation and uterine remodelling during menstruation. This is based on the ability of the metalloproteinases to cleave a broad range of matrix substrates such as collagen, proteoglycan and fibronectin. Metalloproteinases are also believed to be important in the processing, or secretion, of biological important cell mediators, such as tumour necrosis factor (TNF); and the post translational proteolysis processing, or shedding, of biologically important membrane proteins, such as the low affinity IgE receptor CD23 (for a more complete list see N. M. Hooper et al, (1997) Biochem. J. 321:265-279).
• TNF tumour necrosis factor
• Metalloproteinases have been associated with many diseases or conditions. Inhibition of the activity of one or more mejtalloproteinases mayjwell be_of benefit_in_1hese_dise.ases_ox. ... conditions, for example: various inflammatory and allergic diseases such as, inflammation of the joint (especially rheumatoid arthritis, osteoarthritis and gout), inflammation of the gastro-intestinal tract (especially inflammatory bowel disease, ulcerative colitis and gastritis), inflammation of the skin (especially psoriasis, eczema, dermatitis); in tumour metastasis or invasion; in disease associated with uncontrolled degradation of the extracellular matrix such as osteoarthritis; in bone resorptive disease (such as osteoporosis and Paget' s disease); in diseases associated with aberrant angio genesis; the enhanced collagen remodelling associated with diabetes, periodontal disease (such as gingivitis), corneal ulceration, ulceration of the skin, post-operative conditions (such as
• MMP 12 also known as macrophage elastase or metalloelastase, was initially cloned in the mouse by Shapiro et al [1992, Journal of Biological Chemistry 267: 4664] and in man by the same group in 1995. MMP 12 is preferentially expressed in activated macrophages, and has been shown to be secreted from alveolar macrophages from smokers [Shapiro et al, 1993, Journal of Biological Chemistry, 268: 23824] as well as in foam cells in atherosclerotic lesions [Matsumoto et al, 1998, Am. J. Pathol. 153: 109].
• a mouse model of COPD is based on challenge of mice with cigarette smoke for six months, two cigarettes a day six days a week. Wild -type mice developed pulmonary emphysema after this treatment. When MMP 12 knock-out mice were tested in this model they developed no significant emphysema, strongly indicating that MMP 12 is a key enzyme in the COPD pathogenesis.
• MMPs such as MMP12 in COPD (emphysema and bronchitis) is discussed in Anderson and Shinagawa, 1999, Current Opinion in Anti-inflammatory and Immunomodulatory Investigational Drugs 1(1): 29-38.
• a recent review of MMP9 provides an excellent source for detailed information and references on this protease: T.H. Vu & Z. Werb (1998) (In : Matrix Metalloproteinases, 1998, edited by W.C. Parks & R.P. Mecham, pp. 115 - 148, Academic Press. ISBN 0-12-545090-7). The following points are drawn from that review by T.H. Vu & Z. Werb (1998).
• MMP9 The expression of MMP9 is restricted normally to a few cell types, including trophoblasts, osteoclasts, neutrophils and macrophages. However, the expression can be induced in these same cells and in other cell types by several mediators, including exposure of the cells to growth factors or cytokines. These are the same mediators often implicated in initiating an inflammatory response. As with other secreted MMPs, MMP9 is released as an inactive Pro-enzyme which is subsequently cleaved to form the enzymatically active enzyme. The proteases required for this activation in vivo are not known.
• TIMP-I tissue Inhibitor of Metalloproteinases -1
• TIMP-I tissue Inhibitor of Metalloproteinases -1
• the balance of induced expression of ProMMP9, cleavage of Pro- to active MMP9 and the presence of TIMP-I combine to determine the amount of catalytically active MMP9 which is present at a local site.
• Proteolytically active MMP9 attacks substrates which include gelatin, elastin, and native Type FV and Type V collagens; it has no activity against native Type I collagen, proteoglycans or laminins. ' •
• MMP9 release measured using enzyme immunoassay, was significantly enhanced in fluids and in AM populations [Am. J. Resp. Cell & MoI. Biol., Nov 1997, 17 (5):583-59U
• increased MMP9 expression has been observed in certain other pathological conditions, thereby implicating MMP9 in disease processes such as COPD, arthritis, tumour metastasis, Alzheimer's disease, multiple sclerosis, and plaque rupture in atherosclerosis leading to acute coronary conditions such as myocardial infarction.
• WO 02/074767 discloses hydantoin derivatives of formula
• MMP inhibitors that are useful as MMP inhibitors, particularly as potent MMP12 inhibitors.
• hydantoin derivatives that are inhibitors of metalloproteinases and are of particular interest in inhibiting MMPs such as MMP12 and MMP9.
• the compounds of the present invention have beneficial potency, selectivity and/or pharmacokinetic properties.
• the compounds of the present invention are within the generic scope of WO 02/074767 but are of a type not specifically exemplified therein.
• R represents H, halogen, CF3 or CH2CN
• R represents Cl to 3 alkyl
• a 3 A and B each independently represent CH or N;
• the compounds of formula (I) may exist in enantiomeric forms. It is to be understood that all enantiomers, diastereomers, racemates and mixtures thereof are included within the scope of the invention.
• R represents chloro
• R represents CF3.
• R represents methyl or ethyl. Ih one embodiment, R represents methyl.
• a and A each represent N. In another embodiment, A represents N and A represents CH. In another embodiment, A and A each represent CH.
• B represents N. In another embodiment, B represents CH. 1 2 1
• R represents CF3; R represents methyl or ethyl; A and A each represent N; and B represents CH.
• R represents CF3; R represents methyl or ethyl; A and A each represent N; and B represents N.
• R represents chloro; R represents methyl or ethyl; A represents N and A represents CH; and B represents N.
• R represents chloro; R represents methyl or ethyl; and A, A and B each represent CH.
• Cl to 3 alkyl denotes a straight or branched chain alkyl group having from 1 to 3 carbon atoms. Examples of such groups include methyl, ethyl, n-propyl and i-propyl.
• halogen referred to herein denotes fluoro, chloro, bromo and iodo.
• Examples of compounds of the invention include:
• Each exemplified compound represents a particular and independent aspect of the invention.
• the compounds of formula (I) may exist in enantiomeric forms. Therefore, all enantiomers, diastereomers, racemates and mixtures thereof are included within the scope of the invention.
• the various optical isomers may be isolated by separation of a racemic mixture of the compounds using conventional techniques, for example, fractional crystallisation, or ⁇ PLC. Alternatively the optical isomers may be obtained by asymmetric synthesis, or by synthesis from optically active starting materials.
• optically isomers exist in the compounds of the invention, we disclose all individual optically active forms and combinations of these as individual specific embodiments of the invention, as well as their corresponding racemates.
• the compounds of formula (I) have (5S)-stereochemistry as shown below:
• the present invention includes compounds of formula (I) in the form of salts.
• Suitable salts include those formed with organic or inorganic acids or organic or inorganic bases. Such salts will normally be pharmaceutically acceptable salts although non-pharmaceutically acceptable salts may be of utility in the preparation and purification of particular compounds.
• Such salts include acid addition salts such as hydrochloride, hydrobromide, citrate, tosylate and maleate salts and salts formed with phosphoric acid or sulphuric acid.
• suitable salts are base salts such as an alkali metal salt, for example, sodium or potassium, an alkaline earth metal salt, for example, calcium or magnesium, or an organic amine salt, for example, triethylamine.
• Salts of compounds of formula (I) may be formed by reacting the free base or another salt thereof with one or more equivalents of an appropriate acid or base.
• the compounds of formula (I) are useful because they possess pharmacological acivity in animals and are thus potentially useful as pharmaceuticals.
• the compounds of the invention are metalloproteinase inhibitors and may thus be used in the treatment of diseases or conditions mediated by MMP 12 and/or MMP9 such as asthma, rhinitis, chronic obstructive pulmonary diseases (COPD), arthritis (such as rheumatoid arthritis and osteoarthritis), atherosclerosis and restenosis, cancer, invasion and metastasis, diseases W involving tissue destruction, loosening of hip joint replacements, periodontal disease, fibrotic disease, infarction and heart disease, liver and renal fibrosis, endometriosis, diseases related to the weakening of the extracellular matrix, heart failure, aortic aneurysms, CNS related diseases such as Alzheimer's disease and multiple sclerosis (MS), and haematological disorders.
• MMP 12 and/or MMP9 such as asthma, rhinitis, chronic
• the compounds of the present invention are potent inhibitors of MMP9 and MMP12.
• the compounds of me present invention also show good selectivity with respect to a relative lack of inhibition of various other MMPs such as MMP14.
• the present invention provides a compound ⁇ £ formula (IX orjt pharmaceutically acceptable salt thereof, as hereinbefore defined for use in therapy.
• the invention provides the use of a compound of formula (I), or a pharmaceutically acceptable salt thereof, as hereinbefore defined in the manufacture of a medicament for use in therapy.
• the invention provides the use of a compound of formula (I) 3 or a pharmaceutically acceptable salt thereof, as hereinbefore defined in the manufacture of a medicament for use in the treatment of diseases or conditions in which inhibition of MMP 12 and/or MMP9 is beneficial.
• the invention provides the use of a compound of formula (I), or a pharmaceutically acceptable salt thereof, as hereinbefore defined in the manufacture of a medicament for use in the treatment of inflammatory disease.
• the invention provides the use of a compound of formula (I), or a pharmaceutically acceptable salt thereof, as hereinbefore defined in the manufacture of a medicament for use in the treatment of an obstructive airways disease such as asthma or COPD.
• the invention provides the use of a compound of formula (I), or a pharmaceutically acceptable salt thereof, as hereinbefore defined in the manufacture of a medicament for use in the treatment of rheumatoid arthritis, osteoarthritis, atherosclerosis, cancer or multiple sclerosis.
• the term “therapy” also includes “prophylaxis” unless there are specific indications to the contrary.
• the terms “therapeutic” and “therapeutically” should be construed accordingly.
• Prophylaxis is expected to be particularly relevant to the treatment of persons who have suffered a previous episode of, or are otherwise considered to be at increased risk of, the _ disease_or conditiqn_in fluestion ⁇ Persons_atjrislipf developing particular disease or condition generally include those having a family history of the disease or condition, or those who have been identified by genetic testing or screening to be particularly susceptible to developing the disease or condition.
• the invention further provides a method of treating a disease or condition in which inhibition of MMP 12 and/or MMP9 is beneficial which comprises administering to a patient a therapeutically effective amount of a compound of formula (I) or a pharmaceutically acceptable salt thereof as hereinbefore defined.
• the invention also provides a method of treating an obstructive airways disease, for example, asthma or COPD, which comprises administering to a patient a therapeutically effective amount of a compound of formula (I) or a pharmaceutically acceptable salt thereof as hereinbefore defined.
• the dosage administered will, of course, vary with the compound employed, the mode of administration, the treatment desired and the disorder to be treated.
• the daily dosage of the compound of formula (I)/salt (active ingredient) may be in the range from 0.001 mg/kg to 75 mg/kg, in particular from 0.5 mg/kg to 30 mg/kg. This daily dose may be given in divided doses as necessary.
• unit dosage forms will contain about 1 mg to 500 mg of a compound of this invention.
• the compounds of formula (I) and pharmaceutically acceptable salts thereof may be used on their own but will generally be administered in the form of a pharmaceutical composition in which the formula (I) compound/salt (active ingredient) is in association with a pharmaceutically acceptable adjuvant, diluent or carrier.
• the pharmaceutical composition will preferably comprise from 0.05 to 99 %w (per cent by weight), more preferably from 0.10 to 70 %w, of active ingredient, and, from 1 to 99.95 %w, more preferably from 30 to 99.90 %w, of a pharmaceutically acceptable adjuvant, diluent or carrier, all percentages by weight being based on total composition.
• the present invention also provides a pharmaceutical composition
• a pharmaceutical composition comprising a compound of formula (I) or a pharmaceutically acceptable salt thereof as hereinbefore defined in association with a pharmaceutically acceptable adjuvant, diluent or carrier.
• the invention further provides a process for the preparation of a pharmaceutical composition of the invention which comprises mixing a compound of formula (I) or a pharmaceutically acceptable salt thereof as hereinbefore defined with a pharmaceutically acceptable adjuvant, diluent or carrier.
• compositions of this invention may be administered in a standard manner for the disease or condition mat it is desired to treat, for example by oral, topical, parenteral, buccal, nasal, vaginal or rectal administration or by inhalation.
• the compounds of this invention may be formulated by means known in the art into the form of, for example, tablets, capsules, aqueous or oily solutions, suspensions, emulsions, creams, ointments, gels, nasal sprays, suppositories, finely divided powders or aerosols for inhalation, and for parenteral use (including intravenous, intramuscular or infusion) sterile aqueous or oily solutions or suspensions or sterile emulsions.
• composition of this invention may also contain, or be co-administered (simultaneously or sequentially) with, one or more pharmacological agents of value in treating one or more diseases or conditions referred to hereinabove such as "Symbicort" (trade mark) product.
• the present invention further provides a process for the preparation of a compound of formula (I) or a pharmaceutically acceptable salt thereof as defined above which, comprises: a) reaction of a compound of formula (II)
• R is as defined in formula (I) and L represents a leaving group, with a compound of formula (III) (or a salt thereof)
• R and B are as defined in formula (I) and LG is a leaving group; with a boronic - acid derivati-ve-of-formula (XII)--
• R , R , A, A and B are as defined in formula (I); with ammonium carbonate and potassium cyanide; and optionally thereafter forming a pharmaceutically acceptable salt thereof.
• suitable leaving groups L include halo, particularly chloro or trifluoromethylsulfonate.
• the reaction is preferably performed in a suitable solvent optionally in the presence of an added base for a suitable period of time, typically 0.5 to 16 h, at ambient to reflux temperature.
• solvents such as N,N-dimethylformamide, pyridine, tetrahydrofuran, acetonitrile, N-methylpyrrolidine or dichloromethane are used.
• the added base may be an organic base such as triethylamine, N,N-diisopropylethylamine, N-methyknorpholine or pyridine, or an inorganic base such as an alkali metal carbonate.
• reaction is typically conducted at ambient temperature for 0.5 to 16 h, or until completion of the reaction has been achieved, as determined by chromatographic or spectroscopic methods. Reactions of sulfonyl halides with various primary and secondary amines are well known in the literature, and the variations of the conditions will be evident for those skilled in the art.
• R represents Cl to 3 alkyl
• protecting groups (PG) can be either carbamates (e.g. amides (e.g. trifluoroacetyl) or alkyl (e.g. tert-butyl or ben ⁇ yl).
• Leaving groups (LG) can be either chloride, bromide, iodide or trifluoromethylsulfonate.
• boronic acids or pinacolboronates may be used.
• Intermediate (IVa-c) can be prepared by standard Suzuki coupling (Chem. Rev.
• amine (IIIa-c) as a hydrochloride salt.
• the free base can be obtained by treatment of (IIIa-c) with base and extraction with an organic solvent such as ethyl acetate or toluene.
• Reacting (IIIa-c) either as a salt or base in a suitable solvent e.g. acetonitrile, tetrahydrofuran, N-methylpyrrolidine or N,N-dimethylfo ⁇ namide
• a suitable solvent e.g. acetonitrile, tetrahydrofuran, N-methylpyrrolidine or N,N-dimethylfo ⁇ namide
• a tertiary amine e.g. triethylamine, pyridine or N,N-diisopropylethylamine
• intermediate (VIIa-c) is deprotected as described above to give amine (VIa-c) as a hydrochloride salt.
• the free base can be isolated by treatment with base and extraction with an organic solvent e.g. ethyl acetate or toluene.
• Reacting (VIa-c) either as a salt or base in a suitable solvent e.g. acetonitrile, tetrahydrofuran, N-methylpyrrolidine or N,N-dimethylformamide
• a suitable solvent e.g. acetonitrile, tetrahydrofuran, N-methylpyrrolidine or N,N-dimethylformamide
• sulfonyl chloride (II) in the presence of a tertiarv amine (e.g.
• Bischler-Napieralski reaction is the Pictet-Spengler synthesis (Org. React. 1951, 6, 151).
• amides carbamates or sulfonamides of 2-phenylethanamines are heated with paraformaldehyde and strong proton acids (e.g. trifluoroacetic acid, sulfuric acid) or Lewis acids in a solvent (e.g. dichloromethane, toluene, formic acid) to give the 1,2,3,4- tetrahydroisoquinoline in a single step (Tetrahedron 2002, 58(8), 1471-1478).
• strong proton acids e.g. trifluoroacetic acid, sulfuric acid
• Lewis acids e.g. dichloromethane, toluene, formic acid
• Reagents a) (CF 3 CO) 2 O, Et 3 N; +4 0 C. b) (HCHO) n , H 2 SO 4 , HOAc; RT. o) NaBH 4 , EtOH; RT or NH 3 (cone), EtOH, heat d) (t-BuOCO) 2 O, Et 3 N, DCH RT.
• the 1,2,3,4-tetrahydroisoquinoline intermediate (Vila) is synthesised by Route A shown in Scheme 2.
• This route is a Friedel-Craft-type reaction of N-[2-(3- bromophenyl)ethyl]-2,2,2-Mfluoroacetamide with formaldehyde and sulfuric acid in acetic acid (Tetrahedron Lett. 1996, 37(31), 5453-5456) giving a mixture of the 6-bromo- and 8-bromoisomer in a ratio of 3 to 1.
• Replacement of the trifluoroacetamide group with a BOC-group gives (Vila).
• the regioisomers are not conveniently separated at this stage.
• 2,7-naphthyridine and some derivatives thereof has been described in the literature.
• One classical route involves several steps and starts with the acid catalysed condensation of malononitrile with diethyl 1,3-acetonedicarboxylate (J. Chem. Soc. 1960, 3513-3515; see also J. Eeterocyd. Chem. 1970, 7, 419-421).
• a slightly different route to 2,7-naphthyridine involves oxidation of 4-formyl-2,7-naphthyridine to give
• the l,2,3,4-tetrahydro-2,7-naphthyridine intermediate (VIIb) can be synthesised as shown in Schemes 3 and 4.
• Route B 5 commercially available 6-methoxynicotinaldehyde is treated successively with the lithium salt of NjNjN'-trimethylethylenediamine, then n-BuLi in hexanes and finally iodine to afford the 4-iodo-6-methoxynicotinaldehyde (cf. Tetrahedron Lett. 1993, 34(39), 6173-6176).
• the iodo compound is coupled with trimethylsilylacetylene under usual Sonagashira-Hagihara conditions (Synthesis 1980, 627-630) and the resulting 6-methoxy-4- [(trimetliylsilyl)ethynyl]hicotinaldehyde is condensed with ammonium hydroxide in ethanol to give 3-methoxy-2,7-naphthyridine (Synthesis 1999, 2, 306-311).
• Regioselective catalytical reduction cf. Eur. J. Med. Chem. Ther.
• Reagents a) n-BuLi, T ⁇ F, -70°C then DMF, -70°C to RT. b) t-Bu ⁇ 2 , DCM, 3A mol. sieves, c) Li-TMP, -20»C then DMF, -20 to -10°C. d) NaBH 3 CN, MeOH, HOAe; RT. e) 48% HBr (aq), reflux; work-up with K 2 CO j (aq). f) Tf 1 O, pyridine +4 « C.
• the compounds of the invention and intermediates thereto may be isolated from their reaction mixtures and, if necessary further purified, by using standard techniques.
• Example 1 (55)-5-Methyl-5-( ' ⁇ r6-r2-( / trifluoromethyl ' )pyrimidin-5-yl1-3.4- dihvdroisoquinolin-2(lH)-yllsulfonyllmethyl)imidazolidine-2,4-dione
• the starting materials were prepared as follows:
• Triflic anhydride (13.9 g, 85 mmol) in dry DCM (70 mL) was added slowly to an ice-cold solution of 2-(trifluoromethyl)pyrimidin-5-ol (13.9, 85 mmol) (US 4,558,039), DIPEA (16 mL, 93 mmol) and dry DCM ( 260 mL) at such a rate that the temperature was kept between 4 0 C and 6 0 C. After the addition was complete, the solution was stirred for 2.5 h at 4 0 C and then allowed to warm to RT. Water (50 mL) and IM phosphoric acid (4.5 mL) were added and the phases were washed and separated.
• 6-Bromo-2-(trifluoroacetyl)-l 5 2,3 5 4-tetrahydroisoquino ⁇ ne was prepared in two steps from [2-(3-bromophenyl)ethyl]amine (4.0 g, 20 mmol) following the procedure of Stokker (Tetrahedron Lett. 1996, 37(31), 5453-5456).
• the starting material was prepared as follows:
• Recombinant human MMP12 catalytic domain may be expressed and purified as described by Parkar A.A. et al, (2000), Protein Expression and Purification, 20, 152.
• the purified enzyme can be used to monitor inhibitors of activity as follows: MMP12 (50 ng/ml final concentration) is incubated for 60 minutes at room temperature with the synthetic substrate Mca-Pro-Cha-Gly-Nva-His-Ala-Dpa-NH 2 (10 ⁇ M) in assay buffer (0.1M "Tris-HCl” (trade mark) buffer, pH 7.3 containing 0.1M NaCl, 2OmM CaCl 2 , 0.020 mM ZnCl and 0.05% (w/v) "Brij 35" (trade mark) detergent) in the presence (10 concentrations) or absence of inhibitors.
• assay buffer 0.1M "Tris-HCl” (trade mark) buffer, pH 7.3 containing 0.1M NaCl, 2OmM CaCl 2 , 0.020 m
• % Inhibition is equal to the [Fluorescence p / M ,y inhibi t or - Fhiorescencebackgwund ⁇ divided by the [Fluorescence ⁇ inhibitor- Fluorescence ⁇ / ⁇ ].
• Purified pro-MMP8 is purchased from Calbiochem.
• the enzyme (at 10 ⁇ g/ml) is activated by p-amino-phenyl-mercuiic acetate (APMA) at 1 mM for 2.5 h, 35 °C.
• APMA p-amino-phenyl-mercuiic acetate
• the activated enzyme can be used to monitor inhibitors of activity as follows: MMP8 (200 ng/ml final concentration) is incubated for 90 minutes at 35 °C (80% H 2 O) with the synthetic substrate
• Mca-Pro-Cha-Gly-Nva-His-Ala-Dpa-NH 2 (12.5 ⁇ M) in assay buffer (0.1M "Tris-HCl” (trade mark) buffer, pH 7.5 containing 0.1M NaCl, 3OmM CaCl 2 , 0.040 mM ZnCl and 0.05% (w/v) "Brij 35” (trade mark) detergent) in the presence (10 concentrations) or absence of inhibitors.
• Activity is determined by measuring the fluorescence at ⁇ ex 320 nm and ⁇ em 405 nm. Percent inhibition is calculated as follows:
• % Inhibition is equal to the [Fluorescence, ? ⁇ inhibi t or ⁇ F morescence 6 ⁇ c ⁇ grow « ⁇ il divided by the inhibitor- Fhiorescemebackgroundl MMP9
• MMP9 Recombinant human MMP9 catalytic domain was expressed and then purified by Zn chelate column chromatography followed by hydroxamate affinity column chromatography.
• the enzyme can be used to monitor inhibitors of activity as follows: MMP9 (5 ng/ml final concentration) is incubated for 30 minutes at RT with the synthetic substrate Mca-Pro-Cha-Gly-Nva-His-Ala-Dpa-NH 2 (5 ⁇ M) in assay buffer (0.1M "Tris-
• HCl (trade mark) buffer, pH 7.3 containing 0.1M NaCl, 2OmM CaCl 2 , 0.020 mM ZnCl and 0.05% (w/v) "Brij 35” (trade mark) detergent) in the presence (10 concentrations) or absence of inhibitors.
• Activity is determined by measuring the fluorescence at ⁇ ex 320 nm and ⁇ em 405 nm. Percent inhibition is calculated as follows:
• % Inhibition is equal to the [Fluorescence ⁇ / ⁇ inhibi t or - Fluorescencef ⁇ c £grott « ⁇ £l divided by the [Fluorescence, m>2lw inhibitor-
• MMP14 Recombinant human MMP14 catalytic domain may be expressed and purified as described by Parkar A.A. et al, (2000), Protein Expression and Purification, 2J), 152.
• the purified enzyme can be used to monitor inhibitors of activity as follows: MMP 14 (10 ng/ml final concentration) is incubated for 60 minutes at room temperature with the synthetic substrate
• Mca-Pro-Cha-Gly-Nva-His-Ala-Dpa-NH 2 (10 ⁇ M) in assay buffer (0.1M "Tris-HCl” (trade mark) buffer, pH 7.5 containing 0. IM NaCl, 2OmM CaCl 2 , 0.020 mM ZnCl and 0.05% (w/v) "Brij 35” (trade mark) detergent) in the presence (5 concentrations) or absence of inhibitors.
• Activity is determined by measuring the fluorescence at ⁇ ex 320 nm and ⁇ em 405 nm. Percent inhibition is calculated as follows: % Inhibition is equal to the
• Recombinant human MMP 19 catalytic domain may be expressed and purified as described by Parkar A.A. et al, (2000), Protein Expression and Purification, 20: 152.
• the purified enzyme can be used to monitor inhibitors of activity as follows: MMP 19 (40 ng/ml final concentration) is incubated for 120 minutes at 35 °C with the synthetic substrate Mca-Pro-

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