Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K9/00—Medicinal preparations characterised by special physical form
  • A61K9/0012—Galenical forms characterised by the site of application
  • A61K9/0053—Mouth and digestive tract, i.e. intraoral and peroral administration
  • A61K9/0063—Periodont
• • 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
  • A61K31/4738—Quinolines; Isoquinolines ortho- or peri-condensed with heterocyclic ring systems
  • A61K31/4745—Quinolines; Isoquinolines ortho- or peri-condensed with heterocyclic ring systems condensed with ring systems having nitrogen as a ring hetero atom, e.g. phenantrolines
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K45/00—Medicinal preparations containing active ingredients not provided for in groups A61K31/00 - A61K41/00
  • A61K45/06—Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K9/00—Medicinal preparations characterised by special physical form
  • A61K9/0012—Galenical forms characterised by the site of application
  • A61K9/0053—Mouth and digestive tract, i.e. intraoral and peroral administration
  • A61K9/006—Oral mucosa, e.g. mucoadhesive forms, sublingual droplets; Buccal patches or films; Buccal sprays
• • 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
• • 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
  • A61P31/12—Antivirals
• • 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
• • 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
  • A61P37/04—Immunostimulants
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • 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
• • 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

• This invention relates to imidazoquinoline compounds that have sulfonamide or sulfamide substitution at the 1 -position and to pharmaceutical compositions containing the compounds.
• a further aspect of this invention relates to the use of these compounds as immunomodulators, for inducing cytokine biosynthesis in animals and in the treatment of diseases including viral and neoplastic diseases.
• EP 894 797 discloses amide substituted imidazoquinoline compounds that are disclosed to be useful as immune response modifying compounds
• WO 00/09506 discloses imidazoquinoline compounds that contain a sulfonamide substituent wherein the sulfonamide nitrogen is part of a saturated heterocyclic ring.
• the compounds of Formula I are useful as immune response modifiers due to their ability to induce cytokine biosynthesis and otherwise modulate the immune reponse when administered to animals. This makes the compounds useful in the treatment of a variety of conditions such as viral diseases and tumors that are responsive to such changes in the immune response.
• the invention further provides pharmaceutial compositions containing a therapeutic ally effective amount of a compound of Formula I and methods of inducing cytokine biosynthesis in an animal, treating a viral infection and/or treating a neoplastic disease in an animal by administering a effective amount of a compound of Formula I to the animal.
• methods of synthesizing compounds of Formula I and intermediates useful in the synthesis of these compounds are provided.
• Ri is -alkyl-NR,- SO 2 -X-R-i or -alkenyl-NR 3 - SO 2 -X-R 4 ;
• R- t is aryl, heteroaryl, heterocyclyl, alkyl or alkenyl, each of which may be unsubstituted or substituted by one or more substituents selected from the group consisting of: -alkyl;
• R 2 is selected from the group consisting of: -hydrogen; -alkyl; -alkenyl; -aryl;
• each R 3 is independently selected from the group consisting of hydrogen and C MO alkyl
• R 5 is selected from the group consisting of hydrogen and C MO alkyl, or Rj and R 5 can combine to form a 3 to 7 membered heterocyclic or substituted heterocyclic ring
• n is 0 to 4 and each R present is independently selected from the group consisting of C O alkyl, C MO alkoxy, halogen and trifluoromethyl, or a pharmaceutically acceptable salt thereof.
• Imidazoquinolines of the invention can be prepared according to Reaction Scheme I where R, Ri, R 2 and n are as defined above.
• step (1) of Reaction Scheme I a 4-chloro-3-nitroquinoline of Formula II is reacted with an amine of Formula R ⁇ NH 2 where Ri is as defined above to provide a 3- nitroquinolin-4-amine of Formula III.
• the reaction can be carried out by adding amine to a solution of a compound of Formula II in a suitable solvent such as chloroform or dichloromethane and optionally heating.
• a suitable solvent such as chloroform or dichloromethane
• Many quinolines of Formula II are known compounds (see for example, U.S. Patent 4,689,338 and references cited therein).
• step (2) of Reaction Scheme I a 3-nitroquinolin-4-amine of Formula III is reduced to provide a quinoline-3,4-diamine of Formula IV.
• the reduction is carried out using a conventional heterogeneous hydrogenation catalyst such as platinum on carbon or palladium on carbon.
• the reaction can conveniently be carried out on a Parr apparatus in a suitable solvent such as isopropyl alcohol or toluene.
• a quinoline-3,4-diamine of Formula IV is reacted with a carboxylic acid or an equivalent thereof to provide a lH-imidazo[4,5-c]quinoline of Formula V.
• Suitable equivalents to carboxylic acid include acid halides, orthoesters, and 1 , 1 -dialkoxyalkyl alkanoates.
• the carboxylic acid or equivalent is selected such that it will provide the desired R 2 substituent in a compound of Formula V.
• triethyl orthoformate will provide a compound where R 2 is hydrogen and triethyl orthoacetate will provide a compound where R 2 is methyl.
• the reaction can be run in the absence of solvent or in an inert solvent such as toluene. The reaction is run with sufficient heating to drive off any alcohol or water formed as a byproduct of the reaction.
• step (4) of Reaction Scheme I a lH-imidazo[4,5-c]quinoline of Formula V is oxidized to provide a lH-imidazo[4,5-c]quinoline-5N-oxide of Formula VI using a conventional oxidizing agent that is capable of forming N-oxides.
• Preferred reaction conditions involve reacting a solution of a compound of Formula V in chloroform with 3- chloroperoxybenzoic acid at ambient conditions.
• step (5) of Reaction Scheme I a lH-imidazo[4,5-c]quinoline-5N-oxide of Formula VI is aminated to provide a lH-imidazo[4,5-c]quinolin-4-amine of Formula VII which is a subgenus of Formula I.
• Step (5) involves (i) reacting a compound of Formula VI with an acylating agent and then (ii) reacting the product with an aminating agent.
• Part (i) of step (5) involves reacting an N-oxide of Formula VI with an acylating agent.
• Suitable acylating agents include alkyl- or arylsulfonyl chlorides (e.g., benezenesulfonyl chloride, methanesulfonyl chloride, p-toluenesulfonyl chloride). Arylsulfonyl chlorides are preferred. P-.r ⁇ -toluenesulfonyl chloride is most preferred.
• Part (ii) of step (5) involves reacting the product of part (i) with an excess of an aminating agent.
• Suitable aminating agents include ammonia (e.g., in the form of ammonium hydroxide) and ammonium salts (e.g., ammonium carbonate, ammonium bicarbonate, ammonium phosphate). Ammonium hydroxide is preferred.
• the reaction is preferably carried out by dissolving the N-oxide of Formula VI in an inert solvent such as dichloromethane, adding the aminating agent to the solution, and then slowly adding the acylating agent.
• the product or a pharmaceutically acceptable salt thereof can be isolated using conventional methods.
• step (5) may be carried out by (i) reacting an N-oxide of Formula VI with an isocyanate and then (ii) hydrolyzing the resulting product.
• Part (i) involves reacting the N-oxide with an isocyanate wherein the isocyanato group is bonded to a carbonyl group.
• Preferred isocyanates include trichloroacetyl isocyanate and aroyl isocyanates such as benzoyl isocyanate.
• the reaction of the isocyanate with the N-oxide is carried out under substantially anhydrous conditions by adding the isocyanate to a solution of the N-oxide in an inert solvent such as chloroform or dichloromethane.
• Part (ii) involves hydrolysis of the product from part (i).
• the hydrolysis can be carried out by conventional methods such as heating in the presence of water or a lower alkanol optionally in the presence of a catalyst such as an alkali metal hydroxide or lower alkoxide.
• Reaction Scheme II an aminoalkyl substituted lH-imidazo[4,5-c]quinolin-4- amine of Formula VIII is reacted with a sulfonyl chloride of Formula IX to provide a compound of Formula X which is a subgenus of Formula I.
• the reaction can be run at ambient temperature in an inert solvent such as dichloromethane in the presence of a base such as pyridine or N,N-diisopropylethylamine.
• Many lH-imidazo[4,5-c]quinolin-4- amines of Formula VIII are known compounds, see for example US Patent 6,069,149 (Namba); others can be readily prepared using known synthetic methods.
• Many sulfonyl chlorides of Formula IX are commercially available; others can be readily prepared using known synthetic methods.
• the product or a pharmaceutically acceptable salt thereof can be isolated using conventional methods.
• substituent contains a sulfonamide
• Reaction Scheme III where R, R 2 , R 4 and n are as defined above and m is 1-20.
• an aminoalkyl substituted lH-imidazo[4,5-c]quinolin-4- amine of Formula VIII is reacted with a sulfonic anhydride of Formula XI to provide a compound of Formula X which is a subgenus of Formula I.
• the reaction can be run at ambient temperature in an inert solvent such as dichloromethane in the presence of a base such as pyridine or N,N-diisopropylethylamine. Alternatively, the reaction can be run at ambient temperature in acetonitrile.
• Many sulfonic anhydrides of Formula XI are commercially available; others can be readily prepared using known synthetic methods.
• the product or a pharmaceutically acceptable salt thereof can be isolated using conventional methods.
• Tertiary sulfonamides of the invention can be prepared according to Reaction Scheme IV where R, R 2 , R 3 , R 4 and n are as defined above and m is 1-20.
• Reaction Scheme IV a lH-imidazo[4,5-c]quinolinyl sulfonamide of Formula X is reacted with a halide of Formula XII to provide a compound of Formula XIII which is a subgenus of Formula I.
• the reaction can be carried out at ambient temperature by adding sodium hydride to a solution of a compound of Formula X in N,N-dimethylformamide and then adding the halide.
• Many halides of Formula XII are commercially available; others can be readily prepared using known synthetic methods.
• the product or a pharmaceutically acceptable salt thereof can be isolated using conventional methods.
• Rj contains a sulfamide group
• Reaction Scheme V wherein R, R 2 , R 4 , R 5 and n are as defined above and m is 1-20.
• step (1) of Reaction Scheme V an aminoalkyl substituted lH-imidazo[4,5- c]quinolin-4-amine of Formula VIII is reacted with sulfuryl chloride to generate in situ a sulfamoyl chloride of Formula XIV.
• the reaction can be carried out by adding a solution of sulfuryl chloride in dichloromethane to a solution of a compound of Formula VIII in dichloromethane in the presence of one equivalent of 4-(dimethylamino)pyridine.
• the reaction is preferably carried out at a reduced temperature (-78°C).
• the reaction mixture can be allowed to warm to ambient temperature.
• step (2) of Reaction Scheme V an amine of Formula R 5 R 4 N ⁇ is reacted with the sulfamoyl chloride of Formula XIV to provide a lH-imidazo[4,5-c]quinolinyl sulfamide of Formula XV which is a subgenus of Formula I.
• the reaction can be carried out by adding a solution containing 2 equivalents of the amine and 2 equivalents of triethylamine in dichloromethane to the reaction mixture from step (1). The addition is preferably carried out at a reduced temperature (-78°C). After the addition is complete the reaction mixture can be allowed to warm to ambient temperature.
• the product or a pharmaceutically acceptable salt thereof can be isolated using conventional methods.
• Tetrahydroimidazoquinolines of the invention can be prepared according to Reaction Scheme VI where R 2 , R 3 , R 4 , and R 5 are as defined above and m is 1-20.
• step (1) of Reaction Scheme VI an aminoalkyl substituted lH-imidazo[4,5- c]quinolin-4-amine of Formula XVI is reduced to provide an aminoalkyl substituted 6,7,8,9-tetrahydro-lH-imidazo[4,5-c]quinolin-4-amine of Formula XVII.
• the reduction is carried out by suspending or dissolving the compound of Formula XVI in trifluoroacetic acid, adding a catalytic amount of platinum (IV) oxide, and then subjecting the mixture to hydrogen pressure.
• the reaction can conveniently be carried out on a Parr apparatus.
• the product or a salt thereof can be isolated using conventional methods.
• step (2a) of Reaction Scheme VI an aminoalkyl substituted 6,7,8,9-tetrahydro- lH-imidazo[4,5-c]quinolin-4-amine of Formula XVII is reacted to provide a compound of Formula XVIII which is a subgenus of Formula I.
• R is hydrogen
• the reaction can be carried out in one step according to the methods described in Reaction Schemes II and III above using a tetrahydroimidazoquinoline of Formula XVII in place of the imidazoquinoline of Formula VIII.
• R 3 is other than hydrogen
• the reaction can be carried out in two steps with step one being carried out according to the methods of Reaction Schemes II and III and step two being carried out according to the method of
• Reaction IV using the tetrahydroimidazoquinoline analog of the imidazoquinoline.
• the product or a pharmaceutically acceptable salt thereof can be isolated using conventional methods.
• step (2b) of Reaction Scheme VI an aminoalkyl substituted 6,7,8,9-tetrahydro- lH-imidazo[4,5-c]quinolin-4-amine of Formula XVII is reacted to provide a compound of
• Tetrahydroimidazoquinolines of the invention can also be prepared according to Reaction Scheme VII where R, R 2 , R , R 4 , R and n are as defined above and m is 1-20.
• step (1) of Reaction Scheme VII a 6,7,8,9-tetrahydro-lH-imidazo[4,5- c]quinolinyl tert-butylcarbamate of Formula XX is hydrolyzed to provide an aminoalkyl substituted 6,7,8,9-tetrahydro-lH-imidazo[4,5-c]quinolin-4-amine of Formula XXI.
• the reaction can be carried out dissolving the compound of Formula XX in a mixture of trifluoroacetic acid and acetonitrile and stirring at ambient temperature.
• the compound of Formula XX can be combined with dilute hydrochloric acid and heated on a steam bath.
• Tetrahydro-lH-imidazo[4,5-c]quinolinyl tert-butylcarbamates of Formula XX can be prepared using the synthetic route disclosed in U.S. Patent 5,352,784 (Nikolaides).
• the product or a salt thereof can be isolated using conventional methods.
• Some compounds of Formula I can be readily prepared from other compounds of Formula I.
• compounds wherein the R substituent contains a chloroalkyl group can be reacted with an amine to provide an R 4 substituent substituted by a secondary or teriary amino group; compounds wherein the R substituent contains a nitro group can be reduced to provide a compound wherein the R 4 substituent contains a primary amine.
• the terms "alkyl”, “alkenyl”, “alkynyl” and the prefix "-alk” are inclusive of both straight chain and branched chain groups and of cyclic groups, i.e. cycloalkyl and cycloalkenyl. Unless otherwise specified, these groups contain from 1 to
• haloalkyl is inclusive of groups that are substituted by one or more halogen atoms, including groups wherein all of the available hydrogen atoms are replaced by halogen atoms. This is also true of groups that include the prefix "haloalk-". Examples of suitable haloalkyl groups are chloromethyl, trifluoromethyl, and the like.
• aryl as used herein includes carbocyclic aromatic rings or ring systems. Examples of aryl groups include phenyl, naphthyl, biphenyl, fluorenyl and indenyl.
• heteroaryl includes aromatic rings or ring systems that contain at least one ring hetero atom (e.g., O, S, N). Suitable heteroaryl groups include furyl, thienyl, pyridyl, quinolinyl, tetrazolyl, imidazo, pyrazolo, thiazolo, oxazolo, and the like.
• Heterocyclyl includes non-aromatic rings or ring systems that contain at least one ring hetero atom (e.g., O, S, N).
• exemplary heterocyclic groups include pyrrolidinyl, tetrahydrofuranyl, morpholinyl, thiomorpholinyl, piperidinyl, piperazinyl, thiazolidinyl, imidazolidinyl, and the like.
• substituted cycloalkyl indicates that the rings or ring systems in question are further substituted by one or more substituents independently selected from the group consisting of alkyl, alkoxy, alkylthio, hydroxy, halogen, haloalkyl, haloalkylcarbonyl, haloalkoxy (e.g., trifluoromethoxy), nitro, alkylcarbonyl, alkenylcarbonyl, arylcarbonyl, heteroarylcarbonyl, aryl, arylalkyl, heteroaryl, heteroarylalkyl, heterocyclyl, heterocycloalkyl, nitrile, alkoxycarbonyl, alkanoyloxy, alkanoylthio, and in the case of cycloalkyl and heterocyclyl, oxo.
• substituents independently selected from the group consisting of alkyl, alkoxy, alkylthio, hydroxy, halogen, haloalkyl, haloal
• bonds are represented by dashed lines. These lines mean that the bonds represented by the dashed line can be present or absent. Accordingly, compounds of Formula I can be either imidazoquinoline compounds or tetrahydroimidazoquinoline compounds.
• the invention is inclusive of the compounds described herein in any of their pharmaceutically acceptable forms, including isomers such as diastereomers and enantiomers, salts, solvates, polymorphs, and the like.
• compositions and Biological Activity contain a therapeutically effective amount of a compound of Formula I in combination with a pharmaceutically acceptable carrier.
• a therapeutically effective amount means an amount of the compound sufficient to induce a therapeutic effect, such as cytokine induction, antitumor activity and/or antiviral activity.
• a therapeutically effective amount means an amount of the compound sufficient to induce a therapeutic effect, such as cytokine induction, antitumor activity and/or antiviral activity.
• the exact amount of active compound used in a pharmaceutical composition of the invention will vary according to factors known to those of skill in the art, such as the physical and chemical nature of the compound as well as the nature of the carrier and the intended dosing regimen, it is anticipated that the compositions of the invention will contain sufficient active ingredient to provide a dose of about lOOng/kg to about 50mg/kg, preferably about lO ⁇ g/kg to about 5mg/kg of the compound to the subject.
• Any of the conventional dosage forms may be used, such as tablets, lozenges, parenteral formulations, syrups, creams, ointments, aerosol formulations, transdermal patches, transmu
• the compounds of the invention have been shown to induce the production of certain cytokines in experiments performed according to the tests set forth below. These results indicate that the compounds are useful as immune response modifiers that can modulate the immune response in a number of different ways, rendering them useful in the treatment of a variety of disorders.
• Cytokines that may be induced by the administration of compounds according to the invention generally include interferon- ⁇ (IFN- ⁇ ) and tumor necrosis factor- ⁇ (TNF- ⁇ ) as well as certain interleukins (IL). Cytokines whose biosynthesis may be induced by compounds of the invention include IFN- ⁇ , TNF- ⁇ , IL-1, 6, 10 and 12, and a variety of other cytokines. Among other effects, cytokines inhibit virus production and tumor cell growth, making the compounds useful in the treatment of viral diseases and tumors.
• IFN- ⁇ interferon- ⁇
• TNF- ⁇ tumor necrosis factor- ⁇
• IL-1 interleukins
• the compounds of the invention affect other aspects of the innate immune response. For example, natural killer cell activity may be stimulated, an effect that may be due to cytokine induction.
• the compounds may also activate macrophages, which in turn stimulates secretion of nitric oxide and the production of additional cytokines. Further, the compounds may cause proliferation and differentiation of B-lymphocytes.
• Compounds of the invention also have an effect on the acquired immune response.
• the production of the T helper type 1 (Thl) cytokine IFN- ⁇ is induced indirectly and the production of the T helper type 2 (Th2) cytokines IL-4, IL-5 and IL-13 are inhibited upon administration of the compounds.
• This activity means that the compounds are useful in the treatment of diseases where upregulation of the Thl response and/or downregulation of the Th2 response is desired.
• the compounds are expected to be useful in the treatment of atopic diseases, e.g., atopic dermatitis, asthma, allergy, and allergic rhinitis; and systemic lupus erythematosis; as a vaccine adjuvant for cell mediated immunity; and possibly as a treatment for recurrent fungal diseases and chlamydia.
• atopic diseases e.g., atopic dermatitis, asthma, allergy, and allergic rhinitis
• systemic lupus erythematosis e.g., atopic dermatitis, asthma, allergy, and allergic rhinitis
• systemic lupus erythematosis e.g., as a vaccine adjuvant for cell mediated immunity
• possibly as a treatment for recurrent fungal diseases and chlamydia e.g., atopic dermatitis, asthma, allergy, and allergic rhinitis
• the immune response modifying effects of the compounds make them useful in the treatment of a wide variety of conditions. Because of their ability to induce the production of cytokines such as IFN- ⁇ and/or TNF- ⁇ , the compounds are particularly useful in the treatment of viral diseases and tumors.
• This immunomodulating activity suggests that compounds of the invention are useful in treating diseases such as, but not limited to, viral diseases including genital warts; common warts; plantar warts; Hepatitis B; Hepatitis C; Herpes Simplex Virus Type I and Type II; molluscum contagiosum; HIV;
• CMV CMV
• VZV intraepithelial neoplasias such as cervical intraepithelial neoplasia; human papillomavirus (HPV) and associated neoplasias; fungal diseases, e.g.
• Candida aspergillus, and cryptococcal meningitis
• neoplastic diseases e.g., basal cell carcinoma, hairy cell leukemia, Kaposi's sarcoma, renal cell carcinoma, squamous cell carcinoma, myelogenous leukemia, multiple myeloma, melanoma, non-Hodgkin's lymphoma, cutaneous T-cell lymphoma, and other cancers
• parasitic diseases e.g., basal cell carcinoma, hairy cell leukemia, Kaposi's sarcoma, renal cell carcinoma, squamous cell carcinoma, myelogenous leukemia, multiple myeloma, melanoma, non-Hodgkin's lymphoma, cutaneous T-cell lymphoma, and other cancers
• parasitic diseases e.g.
• Additional diseases or conditions that can be treated using the compounds of the invention include eczema; eosinophilia; essential thrombocythaemia; leprosy; multiple sclerosis; Ommen's syndrome; discoid lupus; Bowen's disease; Bowenoid papulosis; and to enhance or stimulate the healing of wounds, including chronic wounds.
• the invention provides a method of inducing cytokine biosynthesis in an animal comprising administering an effective amount of a compound of Formula I to the animal.
• An amount of a compound effective to induce cytokine biosynthesis is an amount sufficient to cause one or more cell types, such as monocytes, macrophages, dendritic cells and B-cells to produce an amount of one or more cytokines such as, for example, IFN- ⁇ , TNF- ⁇ , IL-1, 6, 10 and 12 that is increased over the background level of such cytokines.
• the precise amount will vary according to factors known in the art but is expected to be a dose of about lOOng/kg to about 50mg/kg, preferably about lO ⁇ g/kg to about 5mg/kg.
• the invention also provides a method of treating a viral infection in an animal, and a method of treating a neoplastic disease in an animal, comprising administering an effective amount of a compound of Formula I to the animal.
• An amount effective to treat or inhibit a viral infection is an amount that will cause a reduction in one or more of the manifestations of viral infection, such as viral lesions, viral load, rate of virus production, and mortality as compared to untreated control animals.
• the precise amount will vary according to factors known in the art but is expected to be a dose of lOOng/kg to about 50mg/kg, preferably about lO ⁇ g/kg to about 5mg/kg.
• An amount of a compound effective to treat a neoplastic condition is an amount that will cause a reduction in tumor size or in the number of tumor foci. Again, the precise amount will vary according to factors known in the art but is expected to be a dose of about lOOng/kg to about 50mg/kg, preferably about 1 O ⁇ g/kg to about 5mg/kg.
• 2-Thiophenesulfonyl chloride (0.3 g in 10 ml dichloromethane, 1.6 mmol) was added dropwise to a stirring solution of l-(4-aminobutyl)-2-butyl-lH-imidazo[4,5- c]quinoline-4-amine (0.5 g, 1.6 mmol), dichloromethane (40 ml), and pyridine (0.8 ml). The reaction was maintained at room temperature for a few hours and then an additional portion of 2-thiophenesulfonyl chloride (0.1 g, 0.6 mmol) was added. The reaction was maintained overnight and then concentrated in vacuo.
• ⁇ -Toluenesulfonyl chloride (0.5 g in 10 ml dichloromethane, 2.7 mmol) was added dropwise to a stirring solution of l-(4-aminobutyl)-2-butyl-lH-imidazo[4,5-c]quinoline-4- amine (0.75 g, 2.4 mmol), dichloromethane (115 ml), and pyridine (1 ml). The reaction was maintained at room temperature for 4 hours and then concentrated in vacuo. The residue was purified by flash column chromatography (silica gel, 9: 1 dichloromethane ⁇ methanol, Rf 0.16). The fractions containing product were combined and washed with saturated aqueous bicarbonate.
• Benzenesulfonyl chloride (0.45 ml in 10 ml dichloromethane, 3.5 mmol) was added dropwise to a stirring solution of l-(4-aminobutyl)-2-butyl-lH-imidazo[4,5- c]quinoline-4-amine (1.0 g, 3.2 mmol), dichloromethane (140 ml), and pyridine (0.8 ml). The reaction was maintained at room temperature for four hours and then concentrated in vacuo.
• Methanesulfonic anhydride (0.6 g, 3.4 mmol) was added dropwise to a stirring solution of l-(4-aminobutyl)-2-butyl-lH-imidazo[4,5-c]quinoline-4-amine (1.0 g, 3.2 mmol) and acetonitrile (200 ml). A precipitate formed within a few minutes. The solvent was removed in vacuo and the residue was partitioned between dichloromethane and saturated aqueous sodium bicarbonate. The fractions were separated and the organic fraction was dried (MgSO ), filtered and concentrated to yield the crude product as a white solid.
• Methanesulfonic anhydride (0.19 g, 1.1 mmol) was added to a stirring solution of l-(4-aminobutyl)-2-(4-methoxybenzyl)-lH-imidazo[4,5-c]quinolin-4-amine (0.4 g, 1.07 mmol), dichloromethane (75 ml) and acetonitrile (100 ml). The reaction was maintained at room temperature for 60 hours. The solvent was removed in vacuo and the residue was purified by flash column chromatography (silica gel, 9: 1 dichloromethane ⁇ methanol).
• the semi-prep hplc fractions were analyzed by LC-APCI/MS and the appropriate fractions were combined and lyophilized.
• the solid was dissolved in ca. 3 mL of 2: 1 dichloromethane-methanol and shaken with ca. 80 mg (300 ⁇ mol) of diisopropylaminomethyl-polystyrene resin (Argonaut PS-DIEA, 3.86 mmol/g) for ⁇ 2 h to liberate the free amine, and then filtered and dried in vacuo to give the product as a solid.
• MS (APCI) m/ 376.16 (M+ ⁇ ).
• Triethylamine (7.26 g, 71.7 mmol) was added to a solution of the material from Part A in ethanol (200 mL) and heated at reflux for 2 days. The reaction mixture was concentrated to provide an orange syrup. HPLC mass spec analysis showed that the syrup contained the desired product and starting material. The syrup was taken up in dichloromethane (100 mL) and then cooled in an ice bath. Triethylamine (5 mL) and benzoyl chloride (1.9 mL) were added. The reaction mixture was maintained at ambient temperature for 2 days at which time analysis by HPLC indicated that the reaction was not complete. The reaction mixture was concentrated under vacuum. The residue was taken up in isopropyl alcohol (150 mL).
• Triethylamine (5 mL) was added and the reaction mixture was heated at reflux overnight. The reaction mixture was concentrated under vacuum. The residue was purified by flash chromatography (silica gel; eluting with 10% methanol in dichloromethane). The fractions containing product were combined and concentrated under vacuum. The residue was recrystallized from acetonitrile to provide 6.7 g of tert-butyl N-[4-(2-phenyl-lH-imidazo[4,5-c]quinolin-l-yl)butyl]carbamate as a solid, m.p. 158-159°C.
• Part E The material from Part D was dissolved in methanol (15 mL) and 1 N hydrochloric acid (100 mL) and then heated at reflux for 2 hours. The reaction mixture was concentrated under vacuum to a volume of about 50 mL. Addition of concentrated ammonium hydroxide to pH 12 did not produce a precipitate. The pH was adjusted to 7 with 1 N hydrochloric acid. The mixture was extracted with dichloromethane and then with ethyl acetate.
• the semi- prep ⁇ PLC fractions were analyzed by LC-APCI/MS and the appropriate fractions were combined and lyophilized to provide the trifluoroacetate salt of the desired sulfonamide.
• the reaction mixture was left on the shaker for an additional hour and then it was put on a sonicator for about 0.5 hours.
• the reaction mixture was analyzed by LC/MS to confirm the formation of the desired product.
• the semi- prep ⁇ PLC fractions were analyzed by LC-APCI/MS and the appropriate fractions were combined and lyophilized to provide the trifluoroacetate salt of the desired sulfonamide. Examples 41 - 52
• the semi-prep ⁇ PLC fractions were analyzed by LC-APCI/MS and the appropriate fractions were combined and lyophilized to provide the trifluoroacetate salt of the desired sulfonamide.
• the vial was placed on a shaker for about 6 hours.
• the reaction mixture was allowed to stand at ambient temperature overnight and was analyzed by LC/MS to confirm the formation of the desired product.
• the semi-prep HPLC fractions were analyzed by LC-APCI/MS and the appropriate fractions were combined and lyophilized to provide the trifluoroacetate salt of the desired sulfonamide.
• This compound was prepared using the method of Examples 54 - 71 above except that 1.1 eq of methanesulfonic anhydride was used in place of the sulfonyl chloride.
• the lH-imidazo[4,5-c]quinolin-4-amine (50 mg) was placed in a 2 dram (7.4 mL) vial. Diisopropylethylamine (1.2 eq) in dichloromethane (-1 mL) was added. A solution containing the sulfonyl chloride (1.1 eq) in dichloromethane ( ⁇ 1 mL) was added. The vial was placed on a shaker for about 2 - 16 (usually 2) hours at ambient temperature. The reaction mixture was analyzed by LC/MS to confirm the formation of the desired product.
• the semi -prep ⁇ PLC fractions were analyzed by LC- APCI MS and the appropriate fractions were combined and lyophilized to provide the trifluoroacetate salt of the desired sulfonamide.
• the tetrahydroquinoline amine starting materials were prepared as follows. A catalytic amount of platinum (IV) oxide was added to a solution of l-(4- aminobutyl)-2-butyl-lH-imidazo[4,5-c]quinolin-4-amine (2.2 g, 7.06 mmol) in trifluoroacetic acid (200 mL). The reaction mixture was hydrogenated at 50 psi (3.44 X 10 Pa) on a Parr apparatus for 6 days.. The reaction mixture was filtered to remove the catalyst and the filtrate was concentrated under vacuum. The residue was combined with 1 N hydrochloric acid (100 mL) and heated on a steam bath for 2 hours.
• platinum (IV) oxide was added to a solution of l-(4- aminobutyl)-2-butyl-lH-imidazo[4,5-c]quinolin-4-amine (2.2 g, 7.06 mmol) in trifluoroacetic acid (200 mL).
• the reaction mixture was hydrogen
• a catalytic amount of platinum (IV) oxide was added to a solution of l-(4- aminobutyl)-2-methoxyethyl-lH-imidazo[4,5-c]quinolin-4-amine (7.7 g, 24.5 mmol) in trifluoroacetic acid (250 mL).
• the reaction mixture was hydrogenated at 50 psi (3.44 X 10 5 Pa) on a Parr apparatus. The progress of the reaction was monitored by LC/MS. Additional catalyst was added 7, 11, and 17 days after the start of the reaction. After 25 days the reaction was complete.
• the reaction mixture was filtered through a layer of Celite® filter aid to remove the catalyst and the filtrate was concentrated under vacuum.
• This compound was prepare using the method of Examples 202 - 213 above except that methanesulfonic anhydride was used in place of the sulfonyl chloride.
• the semi- prep HPLC fractions were analyzed by LC-APCI MS and the appropriate fractions were combined and lyophilized.
• the lyophilized material was purified a second time by semi- preparative HPLC using the same conditions except that the gradient elution from 5-95% B was run for 60 minutes instead of 10 minutes.
• the semi-prep HPLC fractions were analyzed by LC-APCI/MS and the appropriate fractions were combined and lyophilized to provide the trifluoroacetate salt of the desired amide.
• This compound was prepared using the general method of Example 215 above, except that trifluoromethanesulfonic anhydride was used in place of the sulfonyl chloride in Part A.
• Examples 217 - 221 The examples in the table below were prepare using the following general method.
• the lH-imidazo[4,5-c]quinolin-4-amine or the 6,7,8,9-tetrahydro-lH-imidazo[4,5- c]quinolin-4-amine (50 mg) was placed in a 2 dram (7.4 mL) vial.
• Dichloromethane (2 mL) and diisopropylethylamine (1.2 eq) were added.
• Dimethylsulfamoyl chloride (1.1 eq) was added.
• the vial was placed on a shaker for about 2 - 4 hours at ambient temperature.
• the reaction mixture was analyzed by LC/MS to confirm the formation of the desired product.
• the semi-prep HPLC fractions were analyzed by LC- APCI/MS and the appropriate fractions were combined and lyophilized to provide the trifluoroacetate salt of the desired sulfamide.
• Examples 222 - 228 The examples in the table below were prepared according to the synthetic method shown in Reaction Scheme V above. l-(4-Aminobutyl)-2-(2-methoxyethyl)-lH-imidazo[4,5-c]quinolin-4-amine (50 mg) was placed in a 2 dram (7.4 mL) vial. 4-(Dimethylamino)pyridine (19 mg, 1.0 eq) and dichloromethane (800 ⁇ L) were added. The vial was sealed and cooled to -78°C in a dry ice/acetone bath. Sulfuryl chloride (186 ⁇ L of 1 M in dichloromethane) was added.
• the vial was put on a shaker for about 30 minutes and then cooled back down to -78°C.
• a separate vial was charged with the amine of formula R 4 R ⁇ N ⁇ (2.0 eq), triethylamine (2.0 eq) and dichloromethane (1 mL) and cooled to -78°C.
• the amine/triethylamine solution was added to the first vial.
• the vial was placed on a shaker at ambient temperature for about 1 hour.
• the reaction mixture was analyzed by LC/MS to confirm the formation of the desired product.
• the semi-prep HPLC fractions were analyzed by LC-APCI/MS and the appropriate fractions were combined and lyophilized to provide the trifluoroacetate salt of the desired sulfamide.
• Examples 229 - 231 The examples in the table below were prepared using the method of Examples 222 - 228 above except that the amine of formula R 4 R NH was reacted with the sulfuryl chloride to provide the sulfamoyl chloride intermediate which was then reacted with 2.0 eq of l-(4-aminobutyl)-2-(2-methoxyethyl)-lH-imidazo[4,5-c]quinolin-4-amine.
• PBMCs Peripheral blood mononuclear cells
• Histopaque®-1077 Sigma Chemicals, St. Louis, MO.
• the PBMCs are suspended at 3-4 x 10 6 cells/mL in RPMI
• PBMC 1640 medium containing 10 % fetal bovine serum, 2 mM L-glutamine and 1% penicillin/streptomycin solution (RPMI complete).
• RPMI complete 1640 medium containing 10 % fetal bovine serum, 2 mM L-glutamine and 1% penicillin/streptomycin solution.
• the PBMC suspension is added to 48 well flat bottom sterile tissue culture plates (Costar, Cambridge, MA or Becton Dickinson Labware, Lincoln Park, NJ) containing an equal volume of RPMI complete media containing test compound.
• the compounds are solubilized in dimethyl sulfoxide (DMSO).
• DMSO concentration should not exceed a final concentration of 1 % for addition to the culture wells.
• test compound is added at 60 ⁇ M to the first well containing RPMI complete and serial (three fold or ten fold) dilutions are made.
• the PBMC suspension is then added to the wells in an equal volume, bringing the test compound concentrations to the desired range.
• the final concentration of PBMC suspension is 1.5-2 X 10 6 cells/mL.
• the plates are covered with sterile plastic lids, mixed gently and then incubated for 18 to 24 hours at 37°C in a 5% carbon dioxide atmosphere.
• Interferon ( ⁇ ) concentration is determined by ELISA using a Human Multi-Species kit from PBL Biomedical Laboratories, New Brunswick, NJ.
• Tumor necrosis factor ( ⁇ ) (TNF)concentration is determined using ELISA kits available from Genzyme, Cambridge, MA; R&D Systems, Minneapolis, MN; or Pharmingen, San Diego, CA.
• the table below lists the lowest concentration found to induce interferon and the lowest concentration found to induce tumor necrosis factor for each compound.
• a "**” indicates that no induction was seen at any of the tested concentrations (0.12, 0.37, 1.1 1, 3.33, 10 and 30 ⁇ M).
• a "***” indicates that no induction was seen at any of the tested concentrations (0.0001, 0.001, 0.01, 0.1, 1 and 10 ⁇ M).

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