WO2002046144A1 - Tetralone derivatives as antitumor agents - Google Patents
Tetralone derivatives as antitumor agents Download PDFInfo
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- WO2002046144A1 WO2002046144A1 PCT/EP2001/014311 EP0114311W WO0246144A1 WO 2002046144 A1 WO2002046144 A1 WO 2002046144A1 EP 0114311 W EP0114311 W EP 0114311W WO 0246144 A1 WO0246144 A1 WO 0246144A1
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- RKFGDJDUVHBNHO-UHFFFAOYSA-N CC(CCCCCC(NO)=O)(CCc1c2cccc1)C2=O Chemical compound CC(CCCCCC(NO)=O)(CCc1c2cccc1)C2=O RKFGDJDUVHBNHO-UHFFFAOYSA-N 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C233/00—Carboxylic acid amides
- C07C233/57—Carboxylic acid amides having carbon atoms of carboxamide groups bound to carbon atoms of rings other than six-membered aromatic rings
- C07C233/60—Carboxylic acid amides having carbon atoms of carboxamide groups bound to carbon atoms of rings other than six-membered aromatic rings having the nitrogen atom of at least one of the carboxamide groups bound to a carbon atom of a hydrocarbon radical substituted by singly-bound oxygen atoms
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D295/00—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms
- C07D295/04—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms
- C07D295/10—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by doubly bound oxygen or sulphur atoms
- C07D295/112—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by doubly bound oxygen or sulphur atoms with the ring nitrogen atoms and the doubly bound oxygen or sulfur atoms separated by carbocyclic rings or by carbon chains interrupted by carbocyclic rings
- C07D295/116—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by doubly bound oxygen or sulphur atoms with the ring nitrogen atoms and the doubly bound oxygen or sulfur atoms separated by carbocyclic rings or by carbon chains interrupted by carbocyclic rings with the doubly bound oxygen or sulfur atoms directly attached to a carbocyclic ring
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
- A61P35/02—Antineoplastic agents specific for leukemia
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- 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
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C259/00—Compounds containing carboxyl groups, an oxygen atom of a carboxyl group being replaced by a nitrogen atom, this nitrogen atom being further bound to an oxygen atom and not being part of nitro or nitroso groups
- C07C259/04—Compounds containing carboxyl groups, an oxygen atom of a carboxyl group being replaced by a nitrogen atom, this nitrogen atom being further bound to an oxygen atom and not being part of nitro or nitroso groups without replacement of the other oxygen atom of the carboxyl group, e.g. hydroxamic acids
- C07C259/06—Compounds containing carboxyl groups, an oxygen atom of a carboxyl group being replaced by a nitrogen atom, this nitrogen atom being further bound to an oxygen atom and not being part of nitro or nitroso groups without replacement of the other oxygen atom of the carboxyl group, e.g. hydroxamic acids having carbon atoms of hydroxamic groups bound to hydrogen atoms or to acyclic carbon atoms
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
- C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/24—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with substituted hydrocarbon radicals attached to ring carbon atoms
- C07D213/44—Radicals substituted by doubly-bound oxygen, sulfur, or nitrogen atoms, or by two such atoms singly-bound to the same carbon atom
- C07D213/46—Oxygen atoms
- C07D213/50—Ketonic radicals
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2601/00—Systems containing only non-condensed rings
- C07C2601/02—Systems containing only non-condensed rings with a three-membered ring
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2602/00—Systems containing two condensed rings
- C07C2602/02—Systems containing two condensed rings the rings having only two atoms in common
- C07C2602/04—One of the condensed rings being a six-membered aromatic ring
- C07C2602/10—One of the condensed rings being a six-membered aromatic ring the other ring being six-membered, e.g. tetraline
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/55—Design of synthesis routes, e.g. reducing the use of auxiliary or protecting groups
Definitions
- the present invention relates to (l-oxo-l,2,3,4-tetxahydro-naphthalen-2-yl)-a]-kanoic acid hydroxamides, or pharmaceutica-ly-acceptable salts thereof. These compounds have been found to possess anti-cell-proliferation activity such as anti-cancer activity and are accordingly useful in methods of treatment of the human or animal body.
- the invention also relates to processes for the manufacture of said (l-oxo-1,2,3,4- tetrahydro-naphthalen-2-yl)-alkanoic acid hydroxamides, to pharmaceutical compositions containing them and to their use in the manufacture of medicaments of use in the production of an anti-cell-proliferation effect in a warm-blooded animal such as a human being.
- Transcriptional regulation is a major event in cell differentiation, proliferation, and apoptosis. Transcriptional activation of a set of genes determines cell destination and for this reason transcription is tightly regulated by a variety of factors.
- One of its regulatory mechanisms involved in the process is an alteration in the tertiary structure of DNA, which affects transcription by modulating an accessibility of transcription factors to their target DNA segments.
- Nucleosomal integrity is regulated by the acetylation status of the core histones. In a hypoacetylated state, nucleosomes are tightly compacted and thus are nonpermissive for transcription. On the other hand, nucleosomes are relaxed by acetylation of the core histones, with the result being permissiveness to transcription.
- HAT histone acetyl transferase
- HDAC histone deacetylase
- (l-oxo-l,2,3,4-tetrahydro-naphthalen-2-yl)-alkanoic acid hydroxamides possess anti-cell-proliferation properties which arise from their HDAC inhibitory activity.
- the HDAC inhibitory activity of several (l-oxo-l,2,3,4-tetrahydro- naphthalen-2-yl)-alkanoic acid hydroxamides described in the present application is superior to SAHA (suberoylanilide hydroxamic acid, which was shown to have HDAC inhibitory activity (US Patent No. 5,369,108)).
- the present invention relates to new compounds of the general formula (I) and their use as antitumor agents:
- Rl is selected from hydrogen, (l-4C)alkyl, COOH, COO(l-4C)alkyl;
- R2, R3, R4, R5 are independently selected from hydrogen, a halogen atom, an (l-4C)alkyl-, trifluoromethyl-, hydroxy-, (l-4C)alkoxy-, aryloxy-, arylalkyloxy-, nitro-, amino-, (l-4C)alkylamino-, di[(l-4C)alkyl]-amino-, piperidino, morpholino, pyrrolidino, (l-4C)alkanoylamino-, or an aryl group, or a heteroaryl group, or R2 and R3 together or R3 and R4 together or R4 and R5 together, respectively, can form an (l-3C)alkylenedioxy ring, or R2 and R3 together or R3 and R4 together or R4 and R5 together, respectively, can form an (3-5C
- X is an alkylene - chain of 4 to 10 carbon atoms which can be saturated or unsaturated with one or two double bonds or one or two triple bonds or a one double and one triple bond, and which can be branched or unbranched or interrupted by a (3-7C) cycloalkyl ring.
- Preferred compounds of formula (I) are those in which R2 and R5 are hydrogen.
- Particularly preferred compounds of formula (I) are those in which three out of the four radicals R2, R3, R4 and R5 are hydrogen.
- a suitable value for a substituent when it is a halogen atom is, for example, fluoro, chloro, bromo and iodo; when it is (l-4C)alkyl is, for example, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl; when it is (l-4C)alkoxy is, for example, methoxy, ethoxy, propoxy, isopropoxy or butoxy; when it is (l-4C)alkylamino is, for example, methylamino, ethylamino or isopropylamino; when it is di-[(l-4C)alkyl] amino is, for example, dimethylamino, N-ethyl-N-methylamino, diethylamino, N-methyl-N- propylamino or dipropylamino; when it is (l-4C)alkanoylamino is, for example,
- An aryl group is a carbocyclic conjugated ring system, for example phenyl, naphthyl, preferably phenyl, which may be unsubstituted or substituted by 1, 2, or 3 substituents independently selected from a halogen atom, an (l-4C)alkyl-, tr-fruoromethyl-, hydroxy-, (l-4C)alkoxy-, arylalkyloxy-, aryloxy, (l-3C)alkylenedioxy-, nitro-, amino-, (l-4C)alkylamino-, di[(l-4C)al-kyl]amino-, or an (l-4C)alkanoylamino-group as defined above.
- substituents independently selected from a halogen atom, an (l-4C)alkyl-, tr-fruoromethyl-, hydroxy-, (l-4C)alkoxy-, arylalkyloxy-, aryl
- a heteroaryl group is either a 5 or 6 membered cyclic conjugated ring system with one or two hetero atoms independently chosen from nitrogen, oxygen, and sulfur, for example pyridinyl, thiophenyl, fury! or pyrrolyl, or an anulated bicyclic conjugated ring system like indolyl-, quinolyl- or isoquinolyl-, which may be unsubstituted or substituted by 1, 2, or 3 substituents independently selected from a halogen atom, an (l-4C)alkyl-, trifluoromethyl-, hydroxy-, (l-4C)alkoxy-, arylalkyloxy-, aryloxy, (l-3C)alkylenedioxy-, nitro-, amino-, (l-4C)alkylamino-, di[(l-4C)alkyl]amino-, or an (l-4C)alkanoylamino-group as defined above.
- a preferred value for the arylalkylo- y- radical is benzyloxy.
- a preferred (3-7C) cycloalkyl ring is cyclopropyl or cyclobutyl whereby the ring is bond to the chain in a l,l'-connection.
- Other preferred values are -(CH 2 ) n - ⁇ - CH(CH 3 )-, -(CH 2 ) n -rC(CH 3 ) 2 - or -(CH 2 ) n ---C(-CH 2 -CH 2 -)- in which n is an integer from 3 to 7, most preferably from 4 to 6.
- a pharmaceutical composition which comprises a pharmaceutically effective amount of one or more compounds of formula I or a pharmaceutically-acceptable salt thereof, as defined hereinbefore in association with a pharmaceutically-acceptable diluent, excipient or carrier.
- the composition may be in a form suitable for oral administration, for example as a tablet or capsule, for parenteral injection (including intravenous, subcutaneous, intramuscular, intravascular or infusion) as a sterile solution, suspension or emulsion, for topical administration as an ointment or cream or for rectal administration as a suppository.
- parenteral injection including intravenous, subcutaneous, intramuscular, intravascular or infusion
- a sterile solution, suspension or emulsion for topical administration as an ointment or cream or for rectal administration as a suppository.
- the above compositions may be prepared in a manner using conventional excipients.
- compositions can be administered orally, for example in the form of tablets, coated tablets, hard or soft gelatin capsules, solutions, emulsions or suspensions. They can also be administered rectally, for example, in the form of suppositories, or parenterally, for example, in the form of injection solutions.
- compositions of the present invention comprising compounds of formula I, their diastereomers,racemates and mixtures or the salts thereof may be manufactured in a manner that is known in the art, e. g., by means of conventional mixing, encapsulating, dissolving, granulating, emulsifying, entrapping, coated tablet- making, or lyophilizing processes.
- These pharmaceutical preparations can be formulated with therapeutically inert, inorganic or organic carriers. Lactose, corn starch or derivatives thereof, talc, steric acid or its salts can be used as such carriers for tablets, coated tablets, dragees and hard gelatin capsules.
- Suitable carriers for soft gelatin capsules are vegetable oils, waxes, fats, semi-solid or liquid poll. Depending on the nature of the active substance, no carriers are generally required in the case of soft gelatin capsules.
- Suitable carriers for the manufacture of solutions and syrups are water, polyols, saccharose, invert sugar and glucose.
- Suitable carriers for injection are water, alcohols, polyols, glycerin, vegetable oils, phospholipids and surfactants.
- Suitable carriers for suppositories are natural or hardened oils, waxes, fats and semi-liquid
- the pharmaceutical preparations can also contain preserving agents, solubilizing agents, stabili-zing agents, wetting agents, emulsifying agents, sweetening agents, coloring agents, flavoring agents, salts for varying the osmotic pressure, buffers, coating agents or antioxidants. They can also contain other therapeutically valuable substances, including additional active ingredients other than those of formula I.
- the (l-oxo-l,2,3,4-tetrahydro-naphthalen-2-yl)-alkanoic acid hydroxamide will normally be administered to a warm-blooded animal at a unit dose within the range 5- 5000 mg per square meter body area of the animal, i.e. approximately 0.1-100 mg/kg, and this normally provides a therapeutically-effective dose.
- a unit dose form such as a tablet or capsule will usually contain, for example 1-250 mg of active ingredient.
- a daily dose in the range of 1-100 mg/kg is employed.
- the daily dose will necessarily be varied depending upon the host treated, the particular route of administration, and the severity of the illness being treated. Accordingly the optimum dosage may be determined by the practitioner who is treating any particular patient.
- a (1-oxo- l,2,3,4-tetrahydro-naphthalen-2-yl)-alkanoic acid hydroxamide derivative of the formula I as defined hereinbefore for use in a method of treatment of the human or animal body by therapy.
- the compounds of the present invention possess anti-cell-proliferation properties arising from their histone deacetylase inhibitory activity. Accordingly the compounds of the present invention are useful in a method for treating the proliferation of malignant cells.
- the compounds of the present invention are expected to be useful in the treatment of cancer by providing an anti-proliferative effect, particularly in the treatment of cancers of the breast, lung, colon, rectum, stomach, prostate, bladder, pancreas and ovary. It is in addition expected that a derivative of the present invention will possess activity against a range of leukemias, lymphoid malignancies and solid tumors such as carcinomas and sarcomas in tissues such as the liver, kidney, prostate and pancreas.
- a method for producing an anti-cell-proliferation effect in a warm-blooded animal, such as man, in need of such treatment which comprises administering to said animal an effective amount of a (l-oxo-l,2,3 ) 4-tetrahydro-naphthalen-2-yl)-alkanoic acid hydroxamide derivative as defined hereinbefore.
- the anti-cell-proliferation treatment defined hereinbefore may be applied as a sole therapy or may involve, in addition to the (l-oxo-l,2,3,4-tetrahydro-naphthalen-2-yl)- alkanoic acid hydroxamide derivative of the invention, one or more other anti-tumor substances, for example those selected from, for example, mitotic inhibitors, for example vinblastine; alkylating agents, for example cis-platin, carboplatin and cyclophosphamide; inhibitors of microtubule assembly, like paclitaxel or other taxanes; antimetabolites, for example 5-fluorouracil, capecitabine, cytosine arabinoside and hydroxyurea, or, for example, intercalating antibiotics, for example adriamycin and bleomycin; immunostimulants, for example trastuzumab; DNA synthesis inhibitor, e.g.
- gemcitabine enzymes, for example asparaginase; topoisomerase inhibitors, for example etoposide; biological response modifiers, for example interferon; and anti- hormones, for example antioestrogens such as tamoxifen or, for example antiandrogens such as (4'-cyano-3-(4-fluorophenylsulphonyl)-2-hydroxy-2-methyl-3'- (trifluoromethyl)propionanilide, or other therapeutic agents and principles as described in, for example, Cancer: Principles & Practice of Oncology, Vincent T. DeVita, Jr., Samuel Hellmann, Steven A. Rosenberg; 5 th Ed., Lippincott-Raven
- a pharmaceutical product comprising a (l-oxo-l,2,3,4,-tetrahydro-naphthalen-2-yl)-alkanoic acid hydroxamide derivative of the formula I as defined hereinbefore and an additional anti-tumor substance as defined hereinbefore for the conjoint treatment of cancer.
- physiologically acceptable salts of compounds of formula I are salts with physiologically acceptable bases. These salts can be, among others, alkali, earth alkali, ammonium and alkylainmonium salts, for example sodium, potassium, calcium, tetra- methylammonium salts.
- Suitable optically active stationary phases include, but are not limited to, silica (e.g. ChiraSperTM, Merck; ChiralpakTM OT/OP, Baker), cellulose esters or carbamates (e.g. ChiracelTM OB/OY,
- the compounds of formula (I) can be prepared by known methods as described in the literature (e.g., in standard textbooks such as Houben-Weyl, “Methoden der Organischen Chemie, Georg Thieme Nerlag”, Stuttgart; Organic Reactions, John Wiley & Sons, Inc., New York) and in the references cited in the examples and namely under reaction conditions that are known and suitable for the said reactions.
- Compounds of formula (I) can be prepared by any process known to be applicable to the preparation of chemically related compounds.
- a compound of formula (I) can be converted by known methods into another compound of formula (I).
- Necessary starting materials may be obtained by standard procedures of organic chemistry. The preparation of such starting materials is described within the accompanying non-limiting examples. Alternatively necessary starting materials are obtainable by analogous procedures to those illustrated which are within the ordinary skills of an organic chemist.
- PG is a suitable protecting group and in which Rl, R2, R3, R4, R5, X and Y have the above meaning.
- Suitable protecting groups PG are for example the benzyl-, p-methoxybenzyl-, tert.butyloxycarbonyl-, trityl-, or silyl groups such as the trimethylsilyl- or dimethyl- tertbutylsilyl-group.
- the reaction conditions for the deprotection depend on the type of the protecting group.
- the protecting group is a benzyl- or p-methoxybenzyl group
- the reaction carried out is a hydrogenolysis in an inert solvent such as an alcohol like methanol or ethanol, in the presence of a noble metal catalyst such as palladium or platinum on a suitable carrier such as carbon, barium sulfate, or barium carbonate, at ambient temperature and pressure.
- the reaction is carried out in the presence of acids at a temperature between -20°C to 60°C, preferably between 0°C and ambient temperature.
- the acid may be a solution of hydrochloric acid in an inert solvent such as diethyl ether or dioxane, or trifluoroacetic acid in dichloromethane.
- the reaction is preferably carried out in the presence of a fluoride source such as sodium fluoride or tetrabutyl ammonium fluoride in an inert solvent such as dichloromethane.
- a fluoride source such as sodium fluoride or tetrabutyl ammonium fluoride in an inert solvent such as dichloromethane.
- the reaction is carried out in the presence of an acid, for example, a solution of hydrochloric acid in an inert solvent such as diethyl ether or dioxane, or trifluoroacetic acid in dichloromethane.
- an acid for example, a solution of hydrochloric acid in an inert solvent such as diethyl ether or dioxane, or trifluoroacetic acid in dichloromethane.
- Compounds of the formula (II) in which Rl is H can be prepared from compounds of the formula (II) in which Rl is COOH by thermal decarboxylation. This can be achieved by heating in an inert solvent for 1 to 48h, preferably 5 to 9h at a temperature between 60 and 200 °C, preferably between 80 and 120°C.
- R2, R3, R4, R5 and Y have the above meaning
- Gl is (l-4C)alkyl or COO(l-4C)alkyl, with a compound of formula (IN)
- A is a displaceable group
- PG has the meaning defined hereinbefore
- X has the above meaning in the absence or presence of a suitable base.
- a suitable displaceable group A is, for example, a halogeno, or sulphonyloxy group, for example a chloro, bromo, methanesulphonyloxy or toluene-p-sulphonyloxy group.
- a suitable base is, for example, an organic amine base such as, for example, pyridine, 2,6- lutidine, collidine, 4-dimethylaminopyridine, ethylamine, morpholine, ⁇ - methylmorpholine or diazabicyelo [5.4.0] undec-7-ene, or, for example, an alkali or alkaline earth metal carbonate or hydroxide, for example sodium carbonate, potassium carbonate, calcium carbonate, sodium hydroxide or potassium hydroxide.
- an organic amine base such as, for example, pyridine, 2,6- lutidine, collidine, 4-dimethylaminopyridine, ethylamine, morpholine, ⁇ - methylmorpholine or diazabicyelo [5.4.0] undec-7-ene
- an alkali or alkaline earth metal carbonate or hydroxide for example sodium carbonate, potassium carbonate, calcium carbonate, sodium hydroxide or potassium hydroxide.
- the reaction is conveniently carried out in the presence of a suitable inert solvent or diluent, for example an alkanol or ester such as methanol, ethanol, isopropanol or ethyl acetate, a halogenated solvent such as methylene chloride, chloroform or carbon tetrachloride, an ether such as tetrahydrofiirane or 1,4-dioxane, an aromatic solvent such as toluene, or a dipolar aprotic solvent such as N,N-dimethylformamide, N,N- dimethylacetamide, N-ethylpyrrolidin-2-one or dimethylsulphoxide.
- a suitable inert solvent or diluent for example an alkanol or ester such as methanol, ethanol, isopropanol or ethyl acetate, a halogenated solvent such as methylene chloride, chloroform or carbon tetrachloride
- R2, R3, R4, R5, X and Y have the above meaning
- G2 is hydrogen, (l-4C)alkyl or COO(l-4C)alkyl
- This reaction typically involves a two-step one-pot procedure.
- the carboxylate of the formula (V) becomes activated.
- This reaction is carried out in an inert solvent or diluent, for example, in dichloromethane, dioxane, or tetrahydrofurane, in the presence of an activating agent.
- a suitable reactive derivative of an acid is, for example, an acyl halide, for example an acyl chloride formed by the reaction of the acid and an inorganic acid chloride, for example thionyl chloride; a mixed anhydride, for example an anhydride formed by the reaction of the acid and a chloroformate such as isobutyl chloroformate; an active ester, for example an ester formed by the reaction of the acid and a phenol such as pentafluorophenol; an active ester formed by the reaction of the acid and N- hydroxybenzotriazole; an acyl azide, for example an azide formed by the reaction of the acid and an azide such as diphenylphosphoryl azide; an acyl cyanide, for example a cyanide formed by the reaction of an acid and a cyanide such as diethylphosphoryl cyanide; or tne pro ⁇ uct 01 me reaction 01 tne aci ⁇ ana a carDo ⁇ nmi ⁇ e
- the reaction is carried out between -30°C and 60° C, conveniently at or below 0°C.
- hydroxylamine is added to the solution, at the temperature used for the activation, and the temperature is slowly adjusted to ambient temperature.
- R6 is an alkyl group, for example, a methyl, ethyl, or tert. butyl group or benzyl group, by hydrolysis.
- the conditions under which the hydrolysis is carried out depend on the nature of the group R6.
- R6 is a methyl or ethyl group
- the reaction is carried out in the presence of a base, for example, lithium hydroxide, sodium hydroxide, or potassium hydroxide in an inert solvent or diluent, for example, in methanol or ethanol.
- R6 is the tertbutyl group
- the reaction is carried out in the presence of an acid, for example, a solution of hydrochloric acid in an inert solvent such as diethyl ether or dioxane, or trifluoroacetic acid in dichloromethane.
- R6 is the benzyl group
- the reaction is carried out by hydrogenolysis in the presence of a noble metal catalyst such as palladium or platinum on a suitable carrier, such as carbon.
- a noble metal catalyst such as palladium or platinum on a suitable carrier, such as carbon.
- a suitable base is, for example, an organic amine base such as, for example, pyridine, 2,6-lutidine, collidine, 4-dimethylaminopyridine, triethylamine, morpholine, N-methylmorpholine or diazabicyclo [5.4.0] undec-7-ene, or, for example, an alkali or alkaline earth metal carbonate or hydroxide, for example sodium carbonate, potassium carbonate, calcium carbonate, sodium hydroxide or potassium hydroxide, or a hydride, for example sodium hydride.
- an organic amine base such as, for example, pyridine, 2,6-lutidine, collidine, 4-dimethylaminopyridine, triethylamine, morpholine, N-methylmorpholine or diazabicyclo [5.4.0] undec-7-ene
- an alkali or alkaline earth metal carbonate or hydroxide for example sodium carbonate, potassium carbonate, calcium carbonate, sodium hydroxide or potassium hydroxide, or a
- the reaction is conveniently carried out in the presence of a suitable inert solvent or diluent, for example an alkanol or ester such as methanol, ethanol, isopropanol or ethyl acetate, a halogenated solvent such as methylene chloride, chloroform or carbon tetrachloride, an ether such as tetrahydrofiirane or 1,4-dioxane, an aromatic solvent such as toluene, or a dipolar aprotic solvent such as N,N-dimethylformamide, N,N- dimethylacetamide, N-ethylpyrrolidin-2-one or dimethylsulphoxide.
- a suitable inert solvent or diluent for example an alkanol or ester such as methanol, ethanol, isopropanol or ethyl acetate, a halogenated solvent such as methylene chloride, chloroform or carbon tetrachloride
- This reaction typically involves a two-step one-pot procedure.
- the carboxylate of the formula (V) becomes activated.
- This reaction is carried out in an inert solvent or diluent, for example, in dichloromethane, dioxane, or tetrahydrofiirane, in the presence of an activating agent.
- a suitable reactive derivative of an acid is, for example, an acyl halide, for example an acyl chloride formed by the reaction of the acid and an inorganic acid chloride, for example thionyl chloride; a mixed anhydride, for example an anhydride formed by the reaction of the acid and a chloroformate such as isobutyl chloroformate; an active ester, for example an ester formed by the reaction of the acid and a phenol such as pentafluorophenol; an active ester formed by the reaction of the acid and N-hydroxybenzotriazole; an acyl azide, for example an azide formed by the reaction of the acid and an azide such as diphenylphosphoryl azide; an acyl cyanide, for example a cyanide formed by the reaction of an acid and a cyanide such as diethylphosphoryl cyanide; or the product of the reaction of the acid and a carbodiimide such as dicyclohexylcarbodiimide, or the
- the reaction is carried out between -30°C and 60°C, conveniently at or below 0°C.
- hydroxylamine is added to the solution, at the temperature used for the activation, and the temperature is slowly adjusted to ambient temperature.
- X, Y, R2, R3, R4 and R5 have the meaning defined hereinbefore and G4 is hydrogen or a (l-4C)alkyl group or COOt.butoxy and R7 is a (l-4C)alkyl group, preferably a methyl or ethyl group, with hydroxylamine in the presence of a suitable base.
- the reaction is carried out in an inert solvent or diluent such as methanol or ethanol at temperatures between 0°C and 100°C, conveniently at or near ambient temperature, and at a pH between 10 and 12.
- a suitable base is, for example, an alcoholate, for example, sodium mefhylate.
- Compounds of formula (X) are prepared in an analogous manner to that described for compounds of formula (VEI).
- 5-(6-methoxy-l-oxo-l,2,3,4-tetrahydro-naphthalen-2-yl)-pentanoic acid (2b) is prepared from 6-methoxy-l-oxo-l,2,3,4-tetrahydro-naphthalene-2-carboxylic acid ethyl ester (2a) (Basu, B., et al., Synth. Commun., 11, 10, 1981, 803-810) in an analogous manner to that described for lb in example 1. 6.6g (24.3mmol) lb are dissolved in 140mL of CH 2 C1 2 .
- the enantiomers of 2d were separated by semipreparative HPLC using a Chiracel OJ-R and water/methanol as the mobile phase. Purity was determined by analytical HPLC (Chiracel OJ-R column [15cm, 4.6mm, particle size 5 ⁇ m] using water 35 / methanol 65 v/v at a flow rate of 0.6ml/min, injection of 5 ⁇ l-samples). Retention time and %ee of each enantiomer was 17.53min (91%ee) and 21.96min (84%ee), respectively.
- 6-(6-Chloro-l-oxo-l,2,3,4-tetrahydro-naphthalen-2-yl)-hexanoic acid (3b) is prepared from 6-chloro-l-oxo-l,2,3,4-tetrahydro-naphthalene-2-carboxylic acid ethyl ester (3a) (WO 98/54350) in an analogous manner to that described for lb in example 1 using ethyl-6-bromo-hexanoate instead of ethyl-6-bromo-hexanoate.
- the enantiomers of 4c were separated by semipreparative HPLC using a Chiracel OJ-R and water/methanol as the mobile phase. Purity was determined by analytical HPLC (Chiracel OJ-R column [15cm, 4.6mm, particle size 5 ⁇ m] using water 40 / methanol 60 v/v at a flow rate of 0.6ml/min, injection of lO ⁇ l-samples). Retention time and %ee of each enantiomer was 16.75min (100%ee) and 20.25min (87%ee), respectively.
- 6-(l-oxo-l,2,3,4-tetrahydro-naphthalen-2-yl)-hexanoic acid hydroxyamide (5a) is prepared from l-oxo-l,2,3,4-tetrahydro-naphthalene-2-carboxylic acid ethyl ester (la) in an analogous manner to that described for the conversion of 3a to 3c in example 3. Yield in the last step is 10%, MS (APCI): 274.1 (M-l).
- the enantiomers of 6b were separated by semipreparative HPLC using a Chiracel OJ-R and water/methanol as the mobile Phase. Purity was determined by analytical HPLC (Chiracel OJ-R column [15cm, 4.6mm, particle size 5 ⁇ m] using water 40 / methanol 60 v/v at a flow rate of 0.6ml/min, injection of lO ⁇ l-samples). Retention time and %ee of each enantiomer was 11.48min (100%ee) and 13.86min (95%ee), respectively.
- SAHA suberanilohydroxamic acid
- Step 4 Pass the granulation from Step 3 through a suitable milling equipment.
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Priority Applications (18)
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EP01999552A EP1349830A1 (en) | 2000-12-07 | 2001-12-06 | Tetralone derivatives as antitumor agents |
KR10-2003-7007640A KR20030077551A (en) | 2000-12-07 | 2001-12-06 | Tetralone derivatives as antitumor agents |
MXPA03004947A MXPA03004947A (en) | 2000-12-07 | 2001-12-06 | Tetralone derivatives as antitumor agents. |
AU2002216074A AU2002216074C1 (en) | 2000-12-07 | 2001-12-06 | Tetralone derivatives |
PL01365324A PL365324A1 (en) | 2000-12-07 | 2001-12-06 | Tetralone derivatives as antitumor agents |
IL15613301A IL156133A0 (en) | 2000-12-07 | 2001-12-06 | Tetralone derivatives as antitumor agents |
CA002430355A CA2430355A1 (en) | 2000-12-07 | 2001-12-06 | Tetralone derivatives as antitumor agents |
BR0115988-7A BR0115988A (en) | 2000-12-07 | 2001-12-06 | Tetralone derivatives as antitumor agents |
CZ20031833A CZ20031833A3 (en) | 2000-12-07 | 2001-12-06 | Tetralone derivatives functioning as antineoplastic agents |
SK851-2003A SK8512003A3 (en) | 2000-12-07 | 2001-12-06 | Tetralone derivatives as antitumor agents |
AU1607402A AU1607402A (en) | 2000-12-07 | 2001-12-06 | Tetralone derivatives as antitumor agents |
NZ526051A NZ526051A (en) | 2000-12-07 | 2001-12-06 | Tetralone derivatives as antitumor agents |
JP2002547883A JP4091431B2 (en) | 2000-12-07 | 2001-12-06 | Tetralone derivatives as antitumor agents |
HU0400579A HUP0400579A2 (en) | 2000-12-07 | 2001-12-06 | Tetralone derivatives as antitumor agents, process for their preparation and pharmaceutical compositions containing them |
NO20032531A NO20032531D0 (en) | 2000-12-07 | 2003-06-04 | Tetralone derivatives as antitumor agents |
HR20030451A HRP20030451A2 (en) | 2000-12-07 | 2003-06-04 | Tetralone derivatives as antitumor agents |
BG107889A BG107889A (en) | 2000-12-07 | 2003-06-06 | Tetralone derivatives as antitumor agents |
HK04103910A HK1060875A1 (en) | 2000-12-07 | 2004-06-01 | Tetralone derivatives as antitumor agents |
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JP (1) | JP4091431B2 (en) |
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BG107889A (en) | 2004-06-30 |
NO20032531L (en) | 2003-06-04 |
SK8512003A3 (en) | 2004-04-06 |
AU2002216074B2 (en) | 2006-01-05 |
BR0115988A (en) | 2004-01-13 |
AU1607402A (en) | 2002-06-18 |
MA26972A1 (en) | 2004-12-20 |
IL156133A0 (en) | 2003-12-23 |
CZ20031833A3 (en) | 2004-02-18 |
JP2004515488A (en) | 2004-05-27 |
AR035659A1 (en) | 2004-06-23 |
PL365324A1 (en) | 2004-12-27 |
AU2002216074C1 (en) | 2006-12-07 |
ZA200304262B (en) | 2004-08-30 |
NZ526051A (en) | 2004-12-24 |
EP1349830A1 (en) | 2003-10-08 |
CN100340545C (en) | 2007-10-03 |
YU45803A (en) | 2006-05-25 |
US20020065282A1 (en) | 2002-05-30 |
ECSP034642A (en) | 2003-07-25 |
CN1478072A (en) | 2004-02-25 |
HRP20030451A2 (en) | 2005-04-30 |
HK1060875A1 (en) | 2004-08-27 |
KR20030077551A (en) | 2003-10-01 |
RU2288220C2 (en) | 2006-11-27 |
NO20032531D0 (en) | 2003-06-04 |
MXPA03004947A (en) | 2003-09-10 |
HUP0400579A2 (en) | 2004-06-28 |
CA2430355A1 (en) | 2002-06-13 |
US6531472B2 (en) | 2003-03-11 |
JP4091431B2 (en) | 2008-05-28 |
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