WO2013129443A1 - 新規ピペリジン化合物又はその塩 - Google Patents
新規ピペリジン化合物又はその塩 Download PDFInfo
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- A61K31/445—Non condensed piperidines, e.g. piperocaine
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Definitions
- the present invention relates to a novel piperidine compound having an Aurora A kinase inhibitory action or a salt thereof, and a use thereof.
- Aurora A is one of serine and threonine kinases, and is widely involved in centrosome formation, maturation, spindle dynamics, chromosome alignment, etc. in the cell cycle division (M phase) and regulates mitotic progression.
- Non-Patent Document 1 So far, overexpression and / or amplification of Aurora A has been confirmed in a wide variety of carcinomas (Non-patent Document 2).
- inhibition of Aurora A kinase in tumor cells induces mitotic arrest and apoptosis, so Aurora A is one of the important target molecules for cancer treatment.
- microtubule agonists typified by taxanes and vinca alkaloids are widely used as basic drugs for cancer chemotherapy, but they have sustained and sufficient therapeutic effects due to their refractoryness and resistance. There are cases where there is not. Therefore, the development of drugs that can enhance the anticancer effects of taxane drugs can provide more effective treatment opportunities and have high clinical needs.
- the cell killing effect of taxane anticancer agents requires activation of the cell cycle spindle formation checkpoint, and tumor cells with reduced activity have been reported to be less sensitive to taxane anticancer agents. (Non-Patent Document 3).
- Non-Patent Document 4 cell lines overexpressing Aurora A are known to be resistant to paclitaxel
- Non-Patent Document 4 inhibition of Aurora A enhances the action of paclitaxel or docetaxel
- Reference 5 On the other hand, Aurora B, which is a subtype, acts together with Aurora A in the division phase (M phase) of the cell cycle, but its inhibition has been reported to reduce spindle checkpoint activity (Non-Patent Document 6). ). Therefore, it is suggested that inhibition of Aurora B may attenuate the effects of taxane drugs.
- Aurora C is strongly expressed in testis and germ cells, and the results of human gene analysis indicate that it is important in spermatogenesis (Non-patent Document 7).
- Non-patent Document 8 As a function of Aurora C in cell division, it is known that it functions to complement the function of Aurora B (Non-patent Document 8).
- the inhibition like the inhibition of Aurora B, induces aneuploidization of cells and thus shows a phenotype that is significantly different from the inhibition of Aurora A, and it is considered that the enhancement of the effects of taxane drugs cannot be expected. Since there is a concern about the influence on the system, it is desirable that the drug does not exhibit the inhibitory activity of Aurora C. From the above, a drug that selectively inhibits Aurora A kinase is expected to effectively enhance its antitumor action and enable a higher therapeutic effect when used in combination with a taxane anticancer agent.
- Non-patent Document 9 there is a report that the cell cycle arrest action induced by paclitaxel persists for several days in a mouse tumor model transplanted with a human cancer cell line. Oral preparations that allow intensive exposure would be desirable.
- Patent Document 1 aminopyridine derivatives exhibiting Aurora A inhibitory activity can be administered orally.
- Patent Document 1 there is a description of an in vitro inhibitory activity against Aurora A and a cell growth inhibitory activity, but there is no description about evaluation when the compound is orally administered.
- an object of the present invention is to provide a novel compound having an excellent Aurora A selective inhibitory effect and useful as an orally administrable anticancer agent, and further a microtubule agonist containing a taxane anticancer agent It is to provide a novel antitumor effect enhancer and a combination therapy.
- a piperidine compound having a specific substituent on the pyridine ring has an excellent selective inhibitory activity against Aurora A and a cancer cell growth inhibitory effect.
- the inventors have found that oral administration is possible, and that the antitumor effect of microtubule agonists including taxane anticancer agents is remarkably enhanced, and the present invention has been completed.
- R 1 represents a carboxyl group, —C ( ⁇ O) NR 5 R 6 , or an oxadiazolyl group optionally having a C 1 -C 6 alkyl group or a trifluoromethyl group as a substituent
- R 2 represents a halogen atom or a C 1 -C 6 alkoxy group
- R 3 is a phenyl group which may have 1 to 3 identical or different groups selected from a halogen atom, a C 1 -C 6 alkyl group, a C 1 -C 6 alkoxy group and a trifluoromethyl group as a substituent.
- R 4 represents a hydrogen atom or a C 1 -C 6 alkyl group
- R 5 and R 6 are the same or different and each represents a hydrogen atom, a C 1 -C 6 alkyl group or a C 3 -C 6 cycloalkyl group, or R 5 and R 6 together with the nitrogen atom to which they are attached. 3 to 6-membered nitrogen-containing saturated heterocyclic group may be formed.
- the piperidine compound represented by these, or its salt is provided.
- the present invention also provides a pharmaceutical comprising the piperidine compound represented by the above general formula (I) or a salt thereof as an active ingredient.
- the present invention also provides an Aurora A selective inhibitor, an antitumor agent, or an antitumor effect enhancer of a microtubule agonist, comprising the piperidine compound represented by the above general formula (1) or a salt thereof as an active ingredient. Is.
- the present invention also relates to the use of the piperidine compound represented by the above general formula (1) or a salt thereof for producing an anti-tumor effect enhancer of an Aurora A selective inhibitor, an antitumor agent, or a microtubule agonist. Is to provide.
- the present invention also provides a piperidine compound represented by the above general formula (1) or a salt thereof for selective inhibition of Aurora A, for cancer treatment, or for enhancing the antitumor effect of a microtubule agonist. Is to provide.
- the present invention also provides an aurora A selective inhibition, cancer treatment, or antitumor of a microtubule agonist, comprising administering an effective amount of a piperidine compound represented by the above general formula (1) or a salt thereof. It provides a method for enhancing the effect.
- the present invention also relates to a cancer therapeutic agent comprising a piperidine compound represented by the above general formula (1) or a salt thereof and a microtubule agonist; represented by the above general formula (1) for cancer treatment.
- the present invention provides a method for treating cancer, comprising administering together an effective amount of a piperidine compound represented by the above general formula (1) or a salt thereof and an effective amount of a microtubule agonist. .
- the present invention relates to the pharmaceutical for oral administration, an aurora A selective inhibitor, an antitumor agent, or an antitumor effect enhancer for microtubule agonists; the aurora A selective inhibitor for oral administration, antitumor Use of an agent or microtubule agonist for the production of an antitumor effect enhancer; for selective inhibition of the Aurora A by oral administration, for cancer treatment, or for enhancing the antitumor effect of a microtubule agonist Or a salt thereof; a method for selectively inhibiting Aurora A, treating cancer, or enhancing the antitumor effect of a microtubule agonist, wherein the administration means is oral administration.
- the compound (I) of the present invention or a salt thereof has excellent Aurora A selective inhibitory activity and cancer cell growth inhibitory action, and can be administered orally, and is useful as an antitumor agent and contains a taxane anticancer agent. Useful in combination with microtubule agonists.
- the type of R 2 is important in terms of Aurora A selective inhibitory activity, oral absorption, antitumor activity by oral administration, and antitumor effect enhancing action of microtubule agonists including taxane anticancer agents. It is a feature of the compound of the present invention that R 2 is a halogen atom or a C 1 -C 6 alkoxy group.
- C 1 -C 6 alkyl group means a linear or branched alkyl group having 1 to 6 carbon atoms, specifically, a methyl group, an ethyl group, an n-propyl group, Examples thereof include isopropyl group, n-butyl group, isobutyl group, sec-butyl group, tert-butyl group, pentyl group, hexyl group and the like, and preferably a linear or branched alkyl group having 1 to 4 carbon atoms ( C 1 -C 4 alkyl group).
- the “oxadiazolyl group” is a 1,2,4-oxadiazolyl group or a 1,3,4-oxadiazolyl group.
- the substituent on the oxadiazolyl ring is preferably an unsubstituted, C 1 -C 4 alkyl group or trifluoromethyl group, more preferably an unsubstituted, methyl group or trifluoromethyl group.
- halogen atom examples include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.
- C 1 -C 6 alkoxy group refers to a linear or branched alkoxy group having 1 to 6 carbon atoms, specifically, a methoxy group, an ethoxy group, an n-propoxy group, An isopropoxy group, an n-butoxy group, an isobutoxy group, a t-butoxy group, a pentoxy group, a hexoxy group, etc., preferably a linear or branched alkoxy group having 1 to 4 carbon atoms (C 1 -C 4 An alkoxy group).
- the “C 3 -C 6 cycloalkyl group” is a monocyclic cycloalkyl group having 3 to 6 carbon atoms, specifically, a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, or a cyclohexyl group. Preferably, it is a cyclopropyl group or a cyclobutyl group.
- R 5 and R 6 may form a 3 to 6-membered nitrogen-containing saturated heterocyclic group together with the nitrogen atom to be bonded” means that R 5 and R 6 are bonded. Together with the nitrogen atom (that is, —NR 5 R 6 ) may further form a 3- to 6-membered saturated heterocyclic group containing 0 to 2 nitrogen atoms and / or oxygen atoms in the ring.
- Specific examples of the 3- to 6-membered nitrogen-containing saturated heterocyclic group that may be formed include azetidinyl group, pyrrolidinyl group, piperidinyl group, piperazinyl group, morpholinyl group, isoxazolidinyl group and the like. Can be mentioned.
- R 1 represents a carboxyl group, —C ( ⁇ O) NR 5 R 6 (wherein R 5 and R 6 are the same or different and represent a hydrogen atom, C 1 -C 6 alkyl, Or a C 3 -C 6 cycloalkyl group, or together with the nitrogen atom to which R 5 and R 6 are bonded, may form an azetidinyl group, a pyrrolidinyl group or an isoxazolidinyl group), or As a substituent, an oxadiazolyl group optionally having a C 1 -C 6 alkyl group or a trifluoromethyl group is preferable.
- R 1 is further a carboxyl group, —C ( ⁇ O) NR 5 R 6 (wherein R 5 and R 6 are the same or different and represent a hydrogen atom, a methyl group, cyclopropyl Or a cyclobutyl group, or an azetidinyl group, a pyrrolidinyl group or an isoxazolidinyl group together with the nitrogen atom to which R 5 and R 6 are bonded), or a methyl group or a trifluoromethyl group as a substituent It is preferably an oxadiazolyl group which may have
- R 2 in the general formula (I) is a halogen atom or a C 1 -C 6 alkoxy group, as shown in the examples below, aurora A selective inhibitory activity, oral absorption, antitumor activity by oral administration, taxane This is important in terms of enhancing the antitumor effect of microtubule agonists including anticancer agents.
- R 2 is preferably a fluorine atom, a chlorine atom or a C 1 -C 4 alkoxy group, more preferably a fluorine atom, a chlorine atom or a methoxy group.
- R 3 is the same or different group selected from a halogen atom, a C 1 -C 4 alkyl group, a C 1 -C 4 alkoxy group and a trifluoromethyl group as a substituent.
- An optionally substituted phenyl group is preferable, and a phenyl group having 1 to 2 groups selected from these substituents which are the same or different is more preferable. More preferably, it is a phenyl group having 1 or 2 groups, which are the same or different, selected from a fluorine atom, a chlorine atom, a methyl group, a methoxy group and a trifluoromethyl group as a substituent.
- R 4 is preferably a hydrogen atom or a C 1 -C 4 alkyl group, more preferably a hydrogen atom or a methyl group.
- R 1 is a carboxyl group, —C ( ⁇ O) NR 5 R 6 (wherein R 5 and R 6 are the same or different and represent a hydrogen atom, a C 1 -C 4 alkyl group or C 3 -C 6 cycloalkyl group, or together with the nitrogen atom to which R 5 and R 6 are bonded, may form an azetidinyl group, a pyrrolidinyl group or an isoxazolidinyl group), or as a substituent , An oxadiazolyl group optionally having a C 1 -C 4 alkyl group or a trifluoromethyl group; R 2 is a fluorine atom, a chlorine atom or a C 1 -C 4 alkoxy group; and R 3 is a substituent.
- a phenyl group which may have one or two identical or different groups selected from a halogen atom, a C 1 -C 4 alkyl group, a C 1 -C 4 alkoxy group and a trifluoromethyl group; R 4 is hydrogen atom or a C 1 -C 4 alkyl In it is preferred.
- R 1 is a carboxyl group, —C ( ⁇ O) NR 5 R 6 (wherein R 5 and R 6 are the same or different, and represent a hydrogen atom, methyl Group, a cyclopropyl group or a cyclobutyl group, or an azetidinyl group, a pyrrolidinyl group or an isoxazolidinyl group together with the nitrogen atom to which R 5 and R 6 are bonded, or a methyl group or An oxadiazolyl group optionally having a trifluoromethyl group;
- R 2 is a fluorine atom, a chlorine atom or a methoxy group;
- R 3 is a fluorine atom, a chlorine atom, a methyl group, a methoxy group and trifluoromethyl as a substituent.
- R 4 is a hydrogen atom or a methyl group.
- R 1 is a carboxyl group, —C ( ⁇ O) NR 5 R 6 (wherein R 5 and R 6 are the same or different and are a hydrogen atom or a methyl group, or R 5 and R 6 are bonded)
- R 2 is a fluorine atom, a chlorine atom or a methoxy group;
- R 3 has one or two groups selected from the fluorine atom, chlorine atom, methyl group, methoxy group and trifluoromethyl group as the same or different substituents.
- a compound in which R 4 is a hydrogen atom or a methyl group is more prefer
- R 1 is a carboxyl group or a 1,2,4-oxadiazolyl group optionally having a methyl group as a substituent
- R 2 is a fluorine atom
- R 3 is a fluorine atom or a chlorine atom as a substituent.
- Particularly preferred are compounds in which the same or different selected group is a phenyl group having 1 to 2 groups; and R 4 is a methyl group.
- Specific preferred compounds of the present invention include the following.
- Compound 2 1- (3-Chloro-2-fluorobenzoyl) -4-((5-fluoro-6- (1H-pyrazol-3-ylamino) pyridin-2-yl) methyl) piperidine-4-carboxylic acid (Compound 10)
- the compound (I) of the present invention can be produced, for example, by the following production methods or the methods shown in the examples. However, the production method of the compound (I) of the present invention is not limited to these reaction examples.
- the raw materials necessary for the synthesis of the compound of the present invention can be easily produced commercially or by a production method based on literature.
- the compound (I-1) in which R 1 is a carboxyl group can be produced, for example, by the following production method 1.
- R 2 , R 3 and R 4 are as defined above.
- the leaving group represented by X or Y includes a halogen atom, preferably a bromine atom.
- the protecting group represented by P include a tert-butyl group, a methoxymethyl group, a [(2-trimethylsilyl) ethoxy] methyl group, and a benzyl group, and a tert-butyl group is preferable.
- Step 1 This step is a method for producing compound (IV) by reacting compound (II) with a base and then reacting with compound (III).
- compound (III) used in this step 6-bromo-2-bromomethyl-5-fluoropyridine, 6-bromo-2-chloromethyl-5-fluoropyridine, 2-bromomethyl-6-chloro-5-fluoro Examples include pyridine, 2-bromomethyl-5,6-dichloropyridine, 6-bromo-2-bromomethyl-5-methoxypyridine and the like, and preferably 6-bromo-2-bromomethyl-5-fluoropyridine.
- Compound (III) can be obtained commercially or can be produced according to a known method.
- the amount of compound (III) used in this step is 0.1 to 10 equivalents, preferably 0.8 to 2 equivalents, relative to 1 equivalent of compound (II).
- the reaction temperature is -90 to 100 ° C, preferably -78 to 0 ° C.
- the reaction time is 0.1 to 100 hours, preferably 0.5 to 10 hours.
- Examples of the base include lithium diisopropylamine, lithium hexamethyldisilazide and the like, and 0.5 to 10 equivalents can be used, and preferably 1 to 1.5 equivalents.
- the solvent used in this reaction is not particularly limited as long as it does not interfere with the reaction, and examples thereof include tetrahydrofuran, 2-methyltetrahydrofuran, diethyl ether, 1,2-dimethoxyethane, toluene, and the like. These may be used alone or in combination. Can be used.
- Compound (IV) thus obtained can be isolated or purified by known separation and purification means such as concentration, concentration under reduced pressure, crystallization, solvent extraction, reprecipitation, chromatography, etc. or without isolation and purification. It can be attached to the process.
- This step is a method for producing compound (VI) by a coupling reaction between compound (IV) and compound (V).
- compound (V) compound (compound (V-1) or compound (V-2)
- compound (V-1) or compound (V-2) used in this step, 1-tert-butyl-3-methyl-1H-pyrazol-5-amine, 1-tert-butyl- 1H-pyrazol-5-amine, 1- ⁇ [2- (trimethylsilyl) ethoxy] methyl ⁇ -1H-pyrazol-3-amine, 5-methyl-1- ⁇ [2- (trimethylsilyl) ethoxy] methyl ⁇ -1H— And pyrazol-3-amine.
- Compound (V) is commercially available, or can be produced according to a known method.
- the amount of compound (V) used in this step is 0.5 to 10 equivalents, preferably 0.8 to 2 equivalents, relative to 1 equivalent of compound (IV).
- the catalyst to be used include metal catalysts such as trisbenzylideneacetone dipalladium and palladium acetate, and 0.001 to 5 equivalents can be used with respect to 1 equivalent of compound (IV), preferably 0.005 to 0.1. Is equivalent.
- Examples of the ligand of the metal catalyst include 4,5-bis (diphenylphosphino) -9,9-dimethylxanthene, 2,2′-bisdiphenylphosphino-1,1′-binaphthyl, and the like ( IV) 0.001 to 5 equivalents can be used with respect to 1 equivalent, and preferably 0.005 to 0.2 equivalents.
- the reaction temperature is 0 to 200 ° C, preferably room temperature to 130 ° C.
- the reaction time is 0.1 to 100 hours, preferably 0.5 to 20 hours.
- the base examples include inorganic bases such as potassium phosphate, sodium carbonate, potassium carbonate, cesium carbonate, sodium tert-butoxide, and organic amines such as trimethylamine, diisopropylethylamine, and pyridine, and 0.5 to 10 equivalents can be used. , Preferably 1 to 3 equivalents.
- the solvent used in this reaction is not particularly limited as long as it does not interfere with the reaction. Toluene, tetrahydrofuran, dioxane, N, N-dimethylformamide, N, N-dimethylacetamide, N-methylpyrrolidin-2-one, Examples thereof include tert-butanol and tert-amyl alcohol, and these can be used alone or in combination.
- the compound (VI) thus obtained can be isolated or purified by a known separation and purification means, for example, concentration, concentration under reduced pressure, crystallization, solvent extraction, reprecipitation, chromatography, etc., or without isolation and purification. It can be attached to the process.
- a known separation and purification means for example, concentration, concentration under reduced pressure, crystallization, solvent extraction, reprecipitation, chromatography, etc., or without isolation and purification. It can be attached to the process.
- This step is a method for producing compound (VII) by deprotecting a tert-butoxycarbonyl group which is a protecting group of compound (VI) in the presence of an acid.
- the reaction conditions used in this step can be performed according to a method described in the literature (Protective Groups in Organic Synthesis, TW Greene, John Wiley & Sons (1981)) or a method analogous thereto.
- the acid to be used include trifluoroacetic acid, hydrochloric acid, sulfuric acid, methanesulfonic acid, and toluenesulfonic acid. 0.1 to 100 equivalents can be used, and preferably 1 to 10 equivalents.
- the reaction temperature is 0 to 200 ° C., preferably room temperature to 100 ° C.
- the reaction time is 0.1 to 100 hours, preferably 0.5 to 20 hours.
- the solvent used in this reaction is not particularly limited as long as it does not interfere with the reaction, and examples thereof include chloroform, acetonitrile, toluene, tetrahydrofuran, dioxane, water, acetic acid, and the like. These may be used alone or in combination. it can.
- the compound (VII) thus obtained can be isolated or purified by known separation and purification means such as concentration, reduced pressure concentration, crystallization, solvent extraction, reprecipitation, chromatography, etc. or without isolation and purification. It can be attached to the process.
- This step is a reaction for obtaining compound (IX) by dehydration condensation reaction of compound (VII) and compound (VIII).
- Examples of the compound (VIII) used in this step include 2-fluoro-3-chlorobenzoic acid and 2,3-dichlorobenzoic acid.
- Compound (VIII) is commercially available, or can be produced according to a known method.
- compound (IX) can be obtained according to a known method using a commonly used condensing agent.
- additives examples include 1-hydroxybenzotriazole (HOBt), 1-hydroxy-7-azabenzotriazole (HOAt), N-hydroxysuccinimide (HOSu), etc., and these are used in an amount of 0.1 to 100 equivalents. Preferably 1 to 10 equivalents. If necessary, 0.1 to 100 equivalents of a base such as trimethylamine, triethylamine, tripropylamine, diisopropylethylamine, N-methylmorpholine, pyridine, 4- (N, N-dimethylamino) pyridine, lutidine, collidine, etc. may be used. Preferably 1 to 10 equivalents.
- a base such as trimethylamine, triethylamine, tripropylamine, diisopropylethylamine, N-methylmorpholine, pyridine, 4- (N, N-dimethylamino) pyridine, lutidine, collidine, etc.
- a base such as trimethylamine, triethyl
- the solvent is not particularly limited, but water, methanol, ethanol, 2-propanol, tetrahydrofuran, 1,4-dioxane, toluene, methylene chloride, chloroform, acetonitrile, N, N-dimethylformamide, N, N, -dimethylacetamide , Dimethyl sulfoxide and the like can be used.
- the reaction temperature is ⁇ 30 to 200 ° C., preferably 0 to 50 ° C.
- the reaction time is 0.1 to 100 hours, preferably 0.5 to 24 hours.
- the compound (IX) thus obtained can be isolated or purified by a known separation and purification means, for example, concentration, concentration under reduced pressure, crystallization, solvent extraction, reprecipitation, chromatography, etc. or without isolation and purification. Can be attached to the process.
- This step is a method for producing compound (I-1) by simultaneously hydrolyzing the cyano group of compound (IX) and deprotecting the protecting group (P) in the substituent Z under acidic conditions.
- the acid to be used include hydrochloric acid, sulfuric acid, methanesulfonic acid, toluenesulfonic acid, and trifluoroacetic acid.
- 0.1 to 100 equivalents can be used, and preferably 1 to 10 equivalents.
- the reaction temperature is room temperature to 200 ° C, preferably 60 to 130 ° C.
- the reaction time is 0.1 to 100 hours, preferably 0.5 to 20 hours.
- the solvent used in this reaction is not particularly limited as long as it does not interfere with the reaction, and examples thereof include dioxane, water, acetic acid, toluene, tetrahydrofuran, and 2-propanol. These may be used alone or in combination. it can.
- the compound (I-1) thus obtained can be isolated and purified by known separation and purification means such as concentration, concentration under reduced pressure, crystallization, solvent extraction, reprecipitation, chromatography and the like.
- the compound (I-2) in which R 1 is —C ( ⁇ O) NR 5 R 6 can be produced, for example, by the following production method 2.
- R 2 , R 3 , R 4 , R 5 and R 6 are as defined above.
- Step 6 This step is a method for producing compound (I-2) by a dehydration condensation reaction between compound (I-1) obtained in Production Method 1 and compound (X).
- Examples of the compound (X) used in this step include amines such as methylamine, dimethylamine, ammonium chloride, cyclopropylamine, pyrrolidine, and salts thereof.
- Compound (X) can be obtained commercially or can be produced according to a known method.
- compound (I-2) can be obtained according to a known method using a commonly used condensing agent.
- additives examples include 1-hydroxybenzotriazole (HOBt), 1-hydroxy-7-azabenzotriazole (HOAt), N-hydroxysuccinimide (HOSu), etc., and these are used in an amount of 0.1 to 100 equivalents. Preferably 1 to 10 equivalents. If necessary, 0.1 to 100 equivalents of a base such as trimethylamine, triethylamine, tripropylamine, diisopropylethylamine, N-methylmorpholine, pyridine, 4- (N, N-dimethylamino) pyridine, lutidine, collidine, etc. may be used. Preferably 1 to 10 equivalents.
- a base such as trimethylamine, triethylamine, tripropylamine, diisopropylethylamine, N-methylmorpholine, pyridine, 4- (N, N-dimethylamino) pyridine, lutidine, collidine, etc.
- a base such as trimethylamine, triethyl
- the solvent is not particularly limited, but water, methanol, ethanol, 2-propanol, tetrahydrofuran, 1,4-dioxane, toluene, methylene chloride, chloroform, acetonitrile, N, N-dimethylformamide, N, N, -dimethylacetamide , Dimethyl sulfoxide and the like can be used.
- the reaction temperature is ⁇ 30 to 200 ° C., preferably 0 to 50 ° C.
- the reaction time is 0.1 to 100 hours, preferably 0.5 to 24 hours.
- the compound (I-2) thus obtained can be isolated and purified by known separation and purification means such as concentration, concentration under reduced pressure, crystallization, solvent extraction, reprecipitation, chromatography and the like.
- the compound (I-3) in which R 1 is 1,2,4-oxadiazole substituted with R 7 can be produced, for example, by the following production method 3. it can.
- R 7 represents a C 1 -C 6 alkyl group or a trifluoromethyl group
- Step 7 is a method for producing compound (XI) by converting the cyano group of compound (VI) obtained as a production intermediate in production method 1 into amide oxime.
- the reaction used in this step can be performed, for example, according to the method described in International Publication WO2005 / 026123, International Publication WO2008 / 117175, International Publication WO2008 / 156721, or the like, or a method analogous thereto.
- compound (VI) can be reacted with hydroxylamine in an alcohol solvent such as ethanol or 2-propanol.
- a base may be used as necessary.
- Examples of the base include organic amines such as triethylamine, diisopropylethylamine, N-methylmorpholine, pyridine, sodium hydrogen carbonate, sodium carbonate, potassium carbonate, cesium carbonate, sodium methoxide, sodium Examples thereof include inorganic salts such as ethoxide and potassium tert-butoxide. Hydroxylamine can be used in an amount of 1 to 100 equivalents, preferably 1 to 10 equivalents.
- the reaction temperature is room temperature to 150 ° C., preferably 50 to 100 ° C.
- the reaction time is 0.1 to 100 hours, preferably 0.5 to 20 hours.
- Compound (XI) thus obtained can be isolated or purified by known separation and purification means such as concentration, concentration under reduced pressure, crystallization, solvent extraction, reprecipitation, chromatography, etc. or without isolation and purification. It can be attached to the process.
- Step 8 This step is a method for producing compound (XII) by converting the amide oxime group of compound (XI) into a 1,2,4-oxadiazole ring.
- the reaction used in this step can be performed, for example, according to the method described in International Publication WO2005 / 026123, International Publication WO2008 / 117175, International Publication WO2008 / 156721, or the like, or a method analogous thereto.
- compound (XI) is dissolved in a solvent such as toluene, chloroform, acetic acid, N, N-dimethylformamide, N-methylpyrrolidin-2-one, pyridine, acetic anhydride, acetyl chloride, triethyl orthoformate, triethyl orthoacetate, etc. It can be performed by reacting with.
- a base may be used as necessary, and examples of the base include triethylamine, diisopropylethylamine, N-methylmorpholine, pyridine and the like.
- the reaction temperature is room temperature to 150 ° C., preferably 50 to 100 ° C.
- the reaction time is 0.1 to 100 hours, preferably 0.5 to 20 hours.
- Compound (XII) thus obtained can be isolated or purified by known separation and purification means such as concentration, concentration under reduced pressure, crystallization, solvent extraction, reprecipitation, chromatography, etc. or without isolation and purification. It can be attached to the process.
- Step 9 compound (XIII) is produced by deprotecting a tert-butoxycarbonyl group which is a protecting group of compound (XII) in the presence of an acid.
- This step can be performed by the same method as in step 3 or a method analogous thereto.
- the compound (XIII) thus obtained can be isolated or purified by known separation and purification means, for example, concentration, concentration under reduced pressure, crystallization, solvent extraction, reprecipitation, chromatography, etc. or without isolation and purification. It can be attached to the process.
- This step is a method for producing compound (XIV) by dehydration condensation reaction of compound (XIII) and compound (VIII). This step can be performed by the same method as in step 4 or a method analogous thereto.
- the compound (XIV) thus obtained can be isolated or purified by known separation and purification means such as concentration, concentration under reduced pressure, crystallization, solvent extraction, reprecipitation, chromatography, etc. or without isolation and purification. It can be attached to the process.
- Step 11 This step is a method for producing a compound (I-3) by deprotecting the protecting group (P) in the substituent Z of the compound (XIV) in the presence of an acid.
- This step can be carried out by the same method as in the fifth step or a method analogous thereto.
- the compound (I-3) thus obtained can be isolated and purified by known separation and purification means such as concentration, concentration under reduced pressure, crystallization, solvent extraction, reprecipitation, chromatography and the like.
- the compound (I-4) in which R 1 is 1,3,4-oxadiazole substituted with R 7 can be produced, for example, by the following production method 4. it can.
- R 7 represents a C 1 -C 6 alkyl group or a trifluoromethyl group; R 2 , R 3 , and R 4 are as defined above.
- Step 12 This step is a method for producing compound (XV) by dehydration condensation reaction of compound (I-1) obtained in Production Method 1 and tert-butoxycarbonyl hydrazide.
- This step can be performed by the same method as in step 4 or a method analogous thereto.
- the compound (XV) thus obtained can be isolated or purified by known separation and purification means such as concentration, concentration under reduced pressure, crystallization, solvent extraction, reprecipitation, chromatography, etc. or without isolation and purification. It can be attached to the process.
- Step 13 In this method, compound (XVI) is produced by deprotecting a tert-butoxycarbonyl group, which is a protecting group of compound (XV), in the presence of an acid.
- This step can be performed by the same method as in step 3 or a method analogous thereto.
- the compound (XVI) thus obtained can be isolated or purified by known separation and purification means such as concentration, concentration under reduced pressure, crystallization, solvent extraction, reprecipitation, chromatography, etc. or without isolation and purification. It can be attached to the process.
- Step 14 This step is a method for producing compound (I-4) by converting the acyl hydrazide group of compound (XVI) into a 1,3,4-oxadiazole ring.
- This step can be performed by the same method as in step 8 or a method analogous thereto.
- the compound (I-4) thus obtained can be isolated or purified by a known separation and purification means such as concentration, concentration under reduced pressure, crystallization, solvent extraction, reprecipitation, chromatography and the like. It can be attached to the next process.
- the compound of the present invention has an isomer such as an optical isomer, a stereoisomer, a positional isomer or a rotational isomer
- a mixture of any isomers is also included in the compound of the present invention.
- an optical isomer exists in the compound of the present invention
- an optical isomer resolved from a racemate is also included in the compound of the present invention.
- Each of these isomers can be obtained as a single compound by synthetic methods and separation methods known per se (concentration, solvent extraction, column chromatography, recrystallization, etc.).
- the compound of the present invention or a salt thereof may be in the form of a crystal, and it is included in the compound of the present invention or a salt thereof regardless of whether the crystal form is single or polymorphic.
- the crystal can be produced by crystallization by applying a crystallization method known per se.
- the compound of the present invention or a salt thereof may be a solvate (such as a hydrate) or a non-solvate, and both are included in the compound of the present invention or a salt thereof.
- Compounds labeled with isotopes (for example, 2 H, 3 H, 13 C, 14 C, 18 F, 35 S, 125 I, etc.) are also encompassed in the compounds of the present invention or salts thereof.
- the salt of the compound of the present invention means a conventional salt used in the field of organic chemistry.
- a base addition salt in the carboxyl group or an amino group or a basic heterocyclic group.
- acid addition salts of the amino group or basic heterocyclic group include alkali metal salts such as sodium salt and potassium salt; alkaline earth metal salts such as calcium salt and magnesium salt; for example ammonium salt;
- organic amine salts such as salts, diethanolamine salts, triethanolamine salts, procaine salts, and N, N′-dibenzylethylenediamine salts.
- the acid addition salt examples include inorganic acid salts such as hydrochloride, sulfate, nitrate, phosphate and perchlorate; for example, acetate, formate, maleate, fumarate, tartrate, citric acid Organic acid salts such as salts, ascorbate and trifluoroacetate; for example, sulfonates such as methanesulfonate, isethionate, benzenesulfonate, and p-toluenesulfonate.
- inorganic acid salts such as hydrochloride, sulfate, nitrate, phosphate and perchlorate
- Organic acid salts such as salts, ascorbate and trifluoroacetate
- sulfonates such as methanesulfonate, isethionate, benzenesulfonate, and p-toluen
- the compound of the present invention or a salt thereof has excellent selective Aurora A inhibitory activity, and is particularly strong as compared with Aurora B and Aurora C inhibitory activity, and is useful as an Aurora A selective inhibitor. Moreover, it has an excellent antitumor effect and is useful as an antitumor agent.
- the target cancer is not particularly limited, but for example, head and neck cancer, esophageal cancer, stomach cancer, duodenal cancer, colon cancer, rectal cancer, liver cancer, gallbladder / bile duct cancer, biliary tract cancer, pancreatic cancer, lung cancer, breast cancer, ovary Cancer, cervical cancer, endometrial cancer, renal cancer, bladder cancer, prostate cancer, testicular tumor, bone / soft tissue sarcoma, blood cancer, multiple myeloma, skin cancer, brain tumor, mesothelioma, blood cancer, etc.
- B-cell lymphoma chronic lymphocytic leukemia, peripheral T-cell lymphoma, myelodysplastic syndrome, acute myeloid leukemia, acute lymphocytic leukemia, multiple myeloma, etc.
- blood cancer stomach cancer, breast cancer, prostate Cancer, ovarian cancer, lung cancer, colon cancer.
- the medicament of the present invention can be applied to humans and non-human animals.
- the antitumor effect of a microtubule agonist is enhanced by enhancing its antitumor effect when used in combination with a microtubule agonist.
- the composition containing the compound of the present invention or a salt thereof and a microtubule agonist is useful as an antitumor agent (cancer therapeutic agent).
- the combined administration of the compound of the present invention or a salt thereof and a microtubule agonist is useful as a method for treating cancer.
- microtubule agonist examples include microtubule stabilizers such as taxane anticancer agents and epothilone anticancer agents, and taxane anticancer agents are preferred.
- taxane anticancer agents include paclitaxel, docetaxel, cabazitaxel and the like, preferably paclitaxel.
- epothilone anticancer agents include epothilone B and epothilone D.
- the antitumor effect potentiator of the present invention can be administered at any time before, after, and simultaneously with the administration of the microtubule agonist. Preferably, they are administered simultaneously or within 4 hours before and after administration of the microtubule agonist.
- the amount of at least one component selected from the compound of the present invention or a salt thereof with respect to 1 mol of the microtubule agonist May be administered in a range of 0.01 to 100 mol, preferably 0.05 to 50 mol, more preferably 0.1 to 20 mol.
- the target cancer is not particularly limited, but for example, head and neck cancer, esophageal cancer, stomach cancer, duodenal cancer, colon cancer, rectal cancer, liver cancer, gallbladder / bile duct cancer, biliary tract cancer, pancreatic cancer, lung cancer, breast cancer, ovary Cancer, cervical cancer, endometrial cancer, renal cancer, bladder cancer, prostate cancer, testicular tumor, bone / soft tissue sarcoma, blood cancer, multiple myeloma, skin cancer, brain tumor, mesothelioma, blood cancer, etc.
- B-cell lymphoma chronic lymphocytic leukemia, peripheral T-cell lymphoma, myelodysplastic syndrome, acute myeloid leukemia, acute lymphocytic leukemia, multiple myeloma, etc.
- blood cancer cervical cancer, gastric cancer Breast cancer, prostate cancer, ovarian cancer, lung cancer, colon cancer.
- the medicament of the present invention can be applied to humans and non-human animals.
- the antitumor effect is obtained by further blending the microtubule agonist with one component selected from the group consisting of the compound of the present invention which is an active ingredient of the antitumor effect enhancer or a salt thereof. It can be set as the anticancer agent which mix
- a pharmaceutical carrier can be blended as necessary to form a pharmaceutical composition, and various dosage forms can be adopted depending on the purpose of prevention or treatment,
- the form may be any of oral preparations, injections, suppositories, ointments, patches and the like. Since the compound of the present invention or a salt thereof has excellent oral absorbability and exhibits excellent antitumor activity upon oral administration, an oral preparation is preferably employed.
- Each of these dosage forms can be produced by a conventional formulation method known to those skilled in the art.
- the pharmaceutical carrier various organic or inorganic carrier substances commonly used as pharmaceutical materials are used, and excipients, binders, disintegrants, lubricants, coloring agents in solid preparations, solvents in liquid preparations, dissolution aids, It is blended as a suspending agent, isotonic agent, buffer, soothing agent and the like.
- formulation additives such as preservatives, antioxidants, colorants, sweeteners, stabilizers and the like can be used as necessary.
- an excipient When preparing an oral solid preparation, an excipient, if necessary, an excipient, a binder, a disintegrant, a lubricant, a coloring agent, a flavoring / flavoring agent, etc. are added to the compound of the present invention. Tablets, coated tablets, granules, powders, capsules and the like can be produced by the method.
- a pH adjuster, buffer, stabilizer, tonicity agent, local anesthetic, etc. are added to the compound of the present invention, and subcutaneous, intramuscular and intravenous injections are prepared by conventional methods. Can be manufactured.
- the amount of the compound of the present invention to be formulated in each of the above dosage unit forms is not constant depending on the symptom of the patient to which it is applied or the dosage form thereof, but generally 0 per oral dosage form per dosage unit form. 0.05 to 1000 mg, 0.01 to 500 mg for injections, and 1 to 1000 mg for suppositories.
- the daily dose of the drug having the above dosage form varies depending on the patient's symptoms, body weight, age, sex, etc., and cannot be determined unconditionally. .05 to 5000 mg, preferably 0.1 to 1000 mg, which is preferably administered once a day or divided into 2 to 3 times a day.
- the NMR spectrum was measured using an AL400 (400 MHz; JEOL), Mercury 400 (400 MHz; Agilent Technology) spectrometer, or an Inova 400 (400 MHz; Agilent Technology) spectrometer equipped with an OM NMR probe (Protasis).
- AL400 400 MHz; JEOL
- Mercury 400 400 MHz; Agilent Technology
- Inova 400 400 MHz; Agilent Technology
- OM NMR probe Protasis
- tetramethylsilane was included in the heavy solvent, tetramethylsilane was used as an internal standard, and in other cases, measurement was performed using an NMR solvent as an internal standard, and all ⁇ values were shown in ppm.
- the microwave reaction was performed using Initiator 8 manufactured by Biotage.
- the LCMS spectrum used was ACQUITY SQD (quadrupole type) manufactured by Waters.
- Example 1 (2,3-dichlorobenzoyl) -4-((5-fluoro-6- (5-methyl-1H-pyrazol-3-ylamino) pyridin-2-yl) methyl) piperidine-4-carboxylic acid (compound 1) Synthesis (Step a) Synthesis of tert-butyl 4-((6-bromo-5-fluoropyridin-2-yl) methyl) -4-cyanopiperidine-1-carboxylate N-Boc-4-cyanopiperidine (5.35 g, 25.4 mmol) was dissolved in 100 mL of tetrahydrofuran, cooled to ⁇ 78 ° C., and then a cyclohexane solution of lithium diisopropylamide / tetrahydrofuran complex (1.5 M, 16.5 mL, 24.8 mmol) was added at an internal temperature.
- Step b tert-butyl 4-((6- (1-tert-butyl-3-methyl-1H-pyrazol-5-ylamino) -5-fluoropyridin-2-yl) methyl) -4-cyanopiperidine- Synthesis of 1-carboxylate Compound obtained in step a above (6.37 g, 16.0 mmol), 5-amino-1-t-butyl-3-methylpyrazole (2.42 g, 15.8 mmol), Xantphos ( 65.9 mg, 114 ⁇ mol), Pd 2 (dba) 3 (51.1 mg, 55.8 ⁇ mol), K 3 PO 4 (3.63 g, 17.1 mmol) are put in a reaction vessel, and finally 50 mL of toluene is added to remove The atmosphere was replaced with argon.
- Step c Synthesis of 4-((6- (1-tert-butyl-3-methyl-1H-pyrazol-5-ylamino) -5-fluoropyridin-2-yl) methyl) -piperidine-4-carbonitrile
- the compound (4.11 g, 8.73 mmol) obtained in the above step b was dissolved in THF (33 mL), and MsOH (7.0 mL) was added on a water bath. The resulting solution was stirred at room temperature for 2 hours, and then the contents were poured into 160 mL of water.
- Step d 4-((6- (1-tert-butyl-3-methyl-1H-pyrazol-5-ylamino) -5-fluoropyridin-2-yl) methyl) -1- (2,3-dichloro Synthesis of benzoyl) piperidine-4-carbonitrile Compound (3.65 g, 9.85 mmol) obtained in step c above, 2,3-dichlorobenzoic acid (2.05 g, 10.8 mmol), 1-hydroxybenzotriazole To a mixture of monohydrates (1.80 g, 13.3 mmol) was added 25 mL of acetonitrile followed by WSC hydrochloride (2.05 g, 10.7 mmol).
- Step e Synthesis of Compound 1
- the compound (524 mg, 0.964 mmol) obtained in Step d above was dissolved in 3 mL of 1,4-dioxane, 3 mL of 5M hydrochloric acid was added, and the mixture was added at 150 ° C. in a microwave reactor. For 10 minutes. The reaction mixture was concentrated under reduced pressure, and the resulting residue was dissolved in chloroform and washed with saturated brine. The resulting chloroform solution was dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure.
- Examples 2 to 13 Examples 2 to 13 were synthesized by the method according to Example 1 using the raw materials described in Tables 1 to 3. Physical property values are shown in Tables 9 to 17.
- Example 14 1- (3-Chloro-2-fluorobenzoyl) -4-((5-fluoro-6- (5-methyl-1H-pyrazol-3-ylamino) pyridin-2-yl) methyl) -N-methylpiperidine- Synthesis of 4-carboxyamide (Compound 14) Compound 13 (50 mg, 0.1 mmol) obtained in Example 13, 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide hydrochloride (40 mg, 0.21 mmol) , 1-hydroxybenzotriazole monohydrate (30 mg, 0.22 mmol), methylamine hydrochloride (25 mg, 0.37 mmol) and dimethylformamide 1 mL were added with 0.05 mL of triethylamine and stirred at room temperature for 13 hours.
- Examples 15-21 Examples 15 to 21 were synthesized by the method according to Example 14 using the raw materials shown in Tables 4 to 5. Physical property values are shown in Tables 9 to 17.
- Example 22 (3-Chloro-2-fluorophenyl) (4-((5-fluoro-6- (5-methyl-1H-pyrazol-3-ylamino) pyridin-2-yl) methyl) -4- (5-methyl- Synthesis of 1,2,4-oxadiazol-3-yl) piperidin-1-yl) methanone (compound 22) (step a) tert-butyl 4-((6- (1-tert-butyl-3-methyl) Synthesis of -1H-pyrazol-5-ylamino) -5-fluoropyridin-2-yl) methyl) -4- (N'-hydroxycarbamimidoyl) piperidine-1-carboxylate obtained in Example 1 (step b) The obtained compound (50 g) was dissolved in 530 mL of ethanol at 60 ° C., returned to room temperature, 65 mL of 50% aqueous hydroxylamine solution was added, and the mixture was stirred at 60 ° C.
- Step b tert-butyl 4-((6- (1-tert-butyl-3-methyl-1H-pyrazol-5-ylamino) -5-fluoropyridin-2-yl) methyl) -4- (5- Synthesis of methyl-1,2,4-oxadiazol-3-yl) piperidine-1-carboxylate
- the compound (53 g, 106 mmol) obtained in the above step a was suspended in 525 mL of toluene, and 10 mL of acetic anhydride was added. The mixture was stirred at room temperature for 1 hour and 20 minutes and then at 100 ° C. for 16 hours.
- Step c N- (1-tert-butyl-3-methyl-1H-pyrazol-5-yl) -3-fluoro-6-((4- (5-methyl-1,2,4-oxadiazole Synthesis of -3-yl) piperidin-4-yl) methyl) pyridin-2-amine
- the compound (57 g) obtained in the above step b was dissolved in 210 mL of acetonitrile, and 27 mL of mesylic acid was added in an ice bath. The mixture was stirred for 17 hours at room temperature for 1 hour. The reaction solution was added to 500 mL of distilled water in an ice bath and washed with 500 mL of diisopropyl ether.
- Step d 4-((6- (1-tert-butyl-3-methyl-1H-pyrazol-5-ylamino) -5-fluoropyridin-2-yl) methyl) -4- (5-methyl-1 , 2,4-oxadiazol-3-yl) piperidin-1-yl) (3-chloro-2-fluorophenyl) methanone
- 3-chloro-2- Fluorobenzoic acid (20 g) and 1-hydroxybenzotriazole monohydrate (21 g) are dissolved in 343 mL of acetonitrile, and 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide hydrochloride (22 g) is dissolved in an ice bath.
- Step e Synthesis of Compound 22
- the compound (2.94 g, 5.03 mmol) obtained in Step d above was dissolved in 30 mL of 5M hydrochloric acid and 20 mL of 2-propanol, and heated at 100 ° C. for 2 hours.
- the reaction mixture was ice-cooled, water and 5M sodium hydroxide were added to adjust the pH to about 8, and the mixture was extracted with ethyl acetate.
- the extract was washed with water and saturated brine, dried over sodium sulfate, and concentrated under reduced pressure.
- Examples 23-27 Examples 23 to 27 were synthesized by the method according to Example 22 using the raw materials shown in Tables 6 to 7. Physical property values are shown in Tables 9 to 17.
- Example 28 (3-Chloro-2-fluorophenyl) (4-((5-fluoro-6- (5-methyl-1H-pyrazol-3-ylamino) pyridin-2-yl) methyl) -4- (5-methyl- Synthesis of 1,3,4-oxadiazol-3-yl) piperidin-1-yl) methanone (compound 28) (step a) tert-butyl 2- (1- (3-chloro-2-fluorobenzoyl)- Synthesis of 4-((5-fluoro-6- (5-methyl-1H-pyrazol-3-ylamino) pyridin-2-yl) methyl) piperidine-4-carbonyl) hydrazine carboxylate
- Compound obtained in Example 13 13 (62 mg, 0.13 mmol), tert-butoxycarbonyl hydrazide (25 mg, 0.19 mmol), 1-hydroxybenzotriazole monohydrate (3 mg, 0.22 mmol) was dissolved in 3 mL of dimethyl
- Step b Synthesis of Compound 28
- the compound (70 mg, 0.12 mmol) obtained in Step a above was dissolved in 4 mL of chloroform, 2 mL of trifluoroacetic acid was added, and the mixture was stirred at room temperature for 3 hours. After concentration of the reaction mixture, chloroform and saturated aqueous sodium hydrogen carbonate solution were added to the residue and the phases were separated. The chloroform extract was dried over anhydrous magnesium sulfate, filtered and concentrated. To the obtained residue, 4 mL of toluene and 0.5 mL of ethyl orthoacetate were added, and the mixture was heated and stirred at 110 ° C. for 2 hours.
- Example 29 (3-Chloro-2-fluorophenyl) (4-((5-fluoro-6- (5-methyl-1H-pyrazol-3-ylamino) pyridin-2-yl) methyl) -4- (3-methyl- Synthesis of 1,2,4-oxadiazol-5-yl) piperidin-1-yl) methanone (Compound 29)
- Compound 13 (49 mg, 0.10 mmol) obtained in Example 13, 1-ethyl-3- (3-Dimethylaminopropyl) carbodiimide hydrochloride (38 mg, 0.20 mmol), 1-hydroxybenzotriazole monohydrate (27 mg, 0.20 mmol), acetamide oxime (15 mg, 0.20 mmol), dimethylformamide (1 mL) Diisopropylethylamine (0.07 mL) was added to the mixture and stirred at room temperature for 7 hours.
- Comparative Examples 2-5, 7 Comparative Examples 2 to 5 and 7 were synthesized according to the method according to Example 1 using the raw materials shown in Table 8. Physical property values are shown in Table 18.
- Step b Synthesis of ethyl 4-((5-bromo-6-chloropyridin-2-yl) methyl) -1- (3-chloro-2-fluorobenzoyl) piperidine-4-carboxylate
- the obtained compound (590 mg, 1.28 mmol) was dissolved in 5 mL of chloroform, 2 mL of trifluoroacetic acid was added, and the mixture was stirred at room temperature for 1 hour. The reaction solution was concentrated and dissolved in 5 mL of DMF.
- Step c Synthesis of 4-((5-bromo-6-chloropyridin-2-yl) methyl) -1- (3-chloro-2-fluorobenzoyl) piperidine-4-carboxylic acid
- the compound (310 mg, 0.598 mmol) was dissolved in 6 mL of ethanol, 5 M sodium hydroxide (0.96 mL) was added, and the mixture was stirred at 80 ° C. for 1.5 hours.
- the reaction mixture was diluted with water, adjusted to pH 1 with 5M hydrochloric acid, and extracted with ethyl acetate. The ethyl acetate layer was washed with water and saturated brine, dried over anhydrous magnesium sulfate, filtered and concentrated.
- Step d Synthesis of Comparative Compound 6 1 mL of N-methylpyrrolidone was added to the compound obtained in the above step c (80 mg, 0.163 mmol) and copper cyanide (16 mg, 0.180 mmol), and a microwave reactor (Biotage Initiator 8). ) And stirred irradiation at 195 ° C. for 40 minutes. The reaction mixture was diluted with water, 1M hydrochloric acid was added, and the mixture was extracted with ethyl acetate. The ethyl acetate layer was washed with water and saturated brine, dried over anhydrous magnesium sulfate, filtered and concentrated.
- the obtained crude purified product (4 mg) was dissolved in 0.5 mL of trifluoroacetic acid and 0.05 mL of anisole, and heated and stirred at 85 ° C. for 1 hour. After concentration, the obtained residue was purified by reverse phase HPLC to obtain the target compound (1 mg, 0.002 mmol) (yield 1%). Physical property values are shown in Table 18.
- Test Example 1 Evaluation of Aurora A and Aurora B Inhibitory Activity The inhibitory activity of the test compound against Aurora A and Aurora B was measured according to the following method.
- MLN8237 an Aurora A selective inhibitor under clinical development, was used.
- 1) Purification of Aurora A protein Human aurora A cDNA fused with a histidine tag at the amino terminus was incorporated into an expression vector and highly expressed in E. coli BL21-CodonPlus (DE3) -RIL strain. After recovering and solubilizing E. coli, the histidine-tagged human aurora A protein was adsorbed on a nickel chelate column, eluted from the column with imidazole, and the active fraction was desalted with a desalting column to obtain a purified enzyme.
- reaction buffer [50 mM Tris-HCl buffer (pH 7.4), 15 mM magnesium acetate, 0.2 mM ethylenediamine-N, N, N ′, N′-tetraacetic acid (EDTA)] Protein, FL-Peptide 21 (Caliper Life Sciences, final concentration is 100 nM), ATP (final concentration is 5 ⁇ M) and the present compound DMSO solution (DMSO final concentration is 5%) are added and incubated at 25 ° C. for 50 minutes. Kinase reaction was performed.
- the kinase reaction was stopped by adding IMAP (registered trademark) Progressive Binding Reagent 500 times diluted with IMAP (registered trademark) Progressive Binding Buffer A of Molecular Devices. After standing for 120 minutes in a dark place at room temperature, the amount of phosphorylation reaction is determined from the degree of fluorescence polarization obtained by measurement with PHERAstar (BMG LABTECH, excitation wavelength 485 nm, detection wavelength 520 nm), and the phosphorylation reaction is suppressed by 50%. The concentration of the compound that can be used is defined as an IC 50 value (nM), and the results are shown in Table 19.
- IMAP registered trademark
- IMAP registered trademark
- Progressive Binding Buffer A of Molecular Devices After standing for 120 minutes in a dark place at room temperature, the amount of phosphorylation reaction is determined from the degree of fluorescence polarization obtained by measurement with PHERAstar (BMG LABTECH, excitation wavelength 485 nm, detection wavelength 520 nm), and
- the in vitro inhibitory activity of a test compound against Aurora B kinase activity was measured in the same manner as Aurora A, and purified recombinant human Aurora B protein was purchased from Carna Biosciences.
- the composition of the reaction buffer was 20 mM HEPES (pH 7.4), 2 mM DTT, 0.01% Tween-20, the final concentration of magnesium chloride was 1 mM, the final concentration of ATP was 40 ⁇ M, and the incubation time was 60 minutes.
- the compound concentration capable of suppressing the phosphorylation reaction by 50% was defined as an IC 50 value (nM), and the results are shown in Table 19.
- DMEM Dulbecco's modified Eagle medium
- FBS fetal bovine serum
- each cell is suspended in the above medium, and the number of cells per well is 2,500 or 3, in each well of a 96-well flat bottom plate (black plate with a transparent bottom). After seeding to 000 cells, the cells were cultured for 1 day at 37 ° C. in an incubator containing 5% carbon dioxide gas.
- the compound of the present invention and the target compound were dissolved in DMSO, and the test compound was serially diluted with DMSO to a concentration 200 times the final concentration.
- a DMSO solution of the test compound is diluted with the culture medium used for the culture, and this is added to each well of the cell culture plate so that the final concentration of DMSO is 0.5% in a culture vessel containing 5% carbon dioxide gas.
- the cells were cultured at 37 ° C for 72 hours. Measurement of the number of cells at the time of addition of the test compound and after culturing for 72 hours was performed based on the protocol recommended by Promega using CellTiter-Glo Luminescent Cell Viability Assay kit (manufactured by Promega).
- the reagent contained in the kit was added to each plate and allowed to stand at room temperature for 10 minutes after stirring. After completion of the reaction, the luminescence signal was measured using a microplate reader.
- the cell growth inhibition rate was calculated from the following formula, the concentration of the test compound that inhibits 50% (GI 50 (nM)) was determined, and the results are shown in Table 20.
- Cell growth inhibition rate (%) (C ⁇ T) / (C ⁇ C0) ⁇ 100 T: luminescence signal of well to which test compound was added
- C luminescence signal of well to which test compound was not added
- C0 luminescence signal of well measured before compound addition
- the compound of the present invention has a cell growth inhibitory effect and is useful as an antitumor agent.
- Test Example 3 Evaluation of Oral Absorption
- the test compound was suspended or dissolved in 0.5% HPMC and orally administered to BALB / cA mice. After oral administration, blood was collected from the fundus at 0.5, 1, 2, 4 and 6 hours to obtain plasma. The compound concentration in the obtained plasma was measured by LCMS to evaluate oral absorption.
- the compounds of Examples 1, 11, 12, 13 and 22 which are the compounds of the present invention were observed to have sufficient plasma concentrations after oral administration and showed good oral absorbability.
- Comparative Examples 2 to 5 and 7 do not show sufficient oral absorbability (AUC 0-6hr is less than 1/8 of the compound of the present invention), and it is difficult to contain it as an active ingredient in an orally administered preparation. The clinical effect was not expected.
- high oral absorption can be imparted by introducing it into a halogen atom or a C 1 -C 6 alkoxy group as R 2 on the pyridine ring. found.
- Luciferase-introduced human cervical cancer cell line (Hela-Luc) is implanted subcutaneously in nude mice, and when the tumor engraftment volume becomes 100-200 mm 3 , the tumor volume of each group becomes uniform.
- One group of 5 animals was divided into a single agent group and a combination group by the random stratification method (Day 1).
- group 1 pachylitaxel (30 mg / kg) was intravenously administered on the first day
- group 2 the compound of the present invention (compound 1) (60 mg / kg) was administered on the second and third days, two days Oral administration twice
- group 3 Comparative compound 1 (60 mg / kg) was orally administered twice a day on the second and third days.
- group 4 pachylitaxel (30 mg / kg) was intravenously administered on day 1 and compound 1 (60 mg / kg) was orally administered twice a day on days 2 and 3
- group 5 pachytaxel (30 mg / kg) was intravenously administered on day 1 and comparative compound 1 (60 mg / kg) was orally administered twice daily on days 2 and 3.
- the relative tumor volume (RTV; Relative Tumor Volume) with the tumor volume at the time of grouping as 1 was determined as the tumor growth rate according to the following formula.
- RTV (tumor volume on the day of tumor volume measurement) / (tumor volume at the time of grouping)
- DRC (%) [(number of individuals whose RTV on the last measurement day of tumor volume does not exceed 1) / (number of mice surviving on the last day)] ⁇ 100
- BWC Body Weight Change
- BWC (%) ([(mouse weight on the weight measurement day) ⁇ (mouse weight at the time of grouping)] / (mouse weight at the time of grouping)) ⁇ 100
- Test Example 5 Evaluation of antitumor effect (2)
- a luciferase-introduced human cervical cancer cell line Hela-Luc
- mice were grouped into a single agent group and a combination group by random stratification. Grouped (Day 1).
- paclitaxel (20 mg / kg) was intravenously administered on the first day.
- Compound 13 (30 mg / kg) or Compound 22 (100 mg / kg) was orally administered twice a day on the second and third days.
- paclitaxel (20 mg / kg) was intravenously administered on day 1 and compound 13 (30 mg / kg) or compound 22 (60 mg / kg) was orally administered twice daily on days 2 and 3. did.
- Tables 22 and 23 show the average RTV values and average BWC values on the 11th day after grouping.
- the compound 13 or compound 22 which is the compound of the present invention is used in combination with paclitaxel, without significantly increasing toxicity such as weight loss, without significant antitumor effect. An enhancement was seen.
- Test Example 6 Measurement of Aurora C Kinase Activity
- the in vitro inhibitory activity of the compounds of the present invention on Aurora C kinase activity was measured. Specifically, the reaction was carried out by the following procedure using the Off-chip Mobility Shift Assay method. Reaction buffer (20 mM HEPES, 0,01% Triton X-100, 2 mM DTT, pH 7.5), compound of the present invention, ATP (final concentration 25 ⁇ M), substrate (kemptide, final concentration 1000 nM), magnesium (final concentration) 5 mM) and purified human aurora C kinase were added and mixed, followed by reaction at room temperature for 1 hour.
- Purified human Aurora C kinase was fused with GST protein at the N-terminal side of full length Aurora C kinase and expressed in baculovirus.
- the GST-Aurora C fusion protein was purified by glutathione sepharose chromatography. After the reaction, a reaction stop solution (Quick Scout Screening Assist MSA; Carna Bioscience Co., Ltd.) was added, and the substrate peptide and phosphorylated peptide in the reaction solution were separated and quantified with a LabChip 3000 system (Carna Bio Science Co., Ltd.).
- the in vitro inhibitory activity measurement method of the compound of the present invention for Aurora C kinase activity is carried out in accordance with the method for measuring Aurora A inhibitory activity shown in Test Example 1-2) above, and the phosphorylation reaction can be suppressed by 50%.
- the compound concentration was defined as an IC 50 value (nM) and compared with the Aurora A inhibitory activity obtained in Test Example 1-2).
- the Aurora C inhibitory activity of the compound of the present invention was about 80 to 100 times weaker than the Aurora A inhibitory activity, suggesting that the compound of the present invention had a significant selective inhibitory activity against Aurora A.
- Test Example 7 Microtubule agonist effect enhancing action (in vitro) Human-derived gastric cancer cell line OCUM-2M cells and human-derived uterine cancer cell line HeLa cells were routinely used in Dulbecco's modified Eagle medium (DMEM) containing 10% fetal bovine serum (FBS) at a cell density not exceeding 80%. Passage.
- DMEM Dulbecco's modified Eagle medium
- FBS fetal bovine serum
- each cell is suspended in the above medium, and the number of cells per well is 2,500 or 3, in each well of a 96-well flat bottom plate (black plate with a transparent bottom). After seeding to 000 cells, the cells were cultured for 1 day at 37 ° C. in an incubator containing 5% carbon dioxide gas.
- microtubule agonists docetaxel, cabazitaxel and epothilone B
- test concentrations of each drug are 10 doses in the range of 0.03 nM to 1000 nM
- DMSO dilute in medium
- the above compound is diluted with DMSO to a final concentration of 300 nM (final concentration of DMSO is 0.1%), and this is cultured in cells. Added to each well of the plate.
- IC 50 value IC 50 _microtubule agonist
- IC 50 value_combined The IC 50 value of the microtubule agonist when the agonist and the compound of the present invention were used in combination was determined. The latter IC 50 value (IC 50 value_combined) was calculated from the cell growth inhibition rate (converted value) of the combination group when the cell growth rate when the compound of the present invention alone was 100%.
- the degree of enhancement of the effect of the microtubule agonist by the addition of the compound of the present invention was judged by the magnitude of the value calculated from the following formula.
- (Combination enhancement effect) (IC 50 value_combination) / (IC 50 value_microtubule agonist) It was judged that there was a strong enhancing effect as the above value exceeded 1, and conversely, when it was below 1 or 1, it was judged that the effect of the combined use was poor.
- microtubule agonists such as docetaxel, cabazitaxel and epothilone B, it was found that the above formula showed a value exceeding 2 and enhanced the cell growth inhibitory effect of these microtubule agonists. .
- the compound of the present invention had excellent Aurora A selective inhibition, showed an excellent antitumor effect, and had good oral absorption.
- the antitumor effect of paclitaxel was strongly enhanced in an in vivo test using nude mice.
- the microtubule agonist other than paclitaxel also enhances the cell growth inhibitory effect.
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Abstract
Description
以上のことから、オーロラAキナーゼを選択的に阻害する薬剤は、タキサン系抗癌剤と併用することで、その抗腫瘍作用を効果的に増強し、より高い治療効果を可能にすると期待されている。
また、ヒト癌細胞株を移植したマウス腫瘍モデルにおいてパクリタキセルにより誘導される細胞周期停止作用が数日間持続するとの報告があり(非特許文献9)、オーロラA阻害剤を併用する際には、持続的な暴露が可能となる経口剤が望ましいと考えられる。
R2は、ハロゲン原子又はC1-C6アルコキシ基を示し;
R3は、置換基としてハロゲン原子、C1-C6アルキル基、C1-C6アルコキシ基及びトリフルオロメチル基から選ばれる基を同一又は異なって1~3個有してもよいフェニル基を示し;
R4は、水素原子又はC1-C6アルキル基を示し;
R5及びR6は、同一又は異なって、水素原子、C1-C6アルキル基又はC3-C6シクロアルキル基を示すか、R5及びR6は、結合する窒素原子と一緒になって3~6員の含窒素飽和ヘテロ環基を形成してもよい。)
で表されるピペリジン化合物又はその塩を提供するものである。
また、R1がカルボキシル基、-C(=O)NR5R6(ここで、R5及びR6は、同一又は異なって、水素原子又はメチル基であるか、R5及びR6が結合する窒素原子と一緒になってイソキサゾリジニル基を示す)、又は置換基としてメチル基を有してもよい1,2,4-オキサジアゾリル基若しくは1,3,4-オキサジアゾリル基であり;R2がフッ素原子、塩素原子又はメトキシ基であり;R3が置換基としてフッ素原子、塩素原子、メチル基、メトキシ基及びトリフルオロメチル基から選ばれる基を同一又は異なって1~2個有するフェニル基であり;R4が水素原子又はメチル基である化合物がより好ましい。
1-(2,3-ジクロロベンゾイル)-4-((5-フルオロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)ピペリジン-4-カルボン酸(化合物1)
1-(2-フルオロ-3-トリフルオロメチルベンゾイル)-4-((5-フルオロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)ピペリジン-4-カルボン酸(化合物2)
1-(3-クロロ-2-フルオロベンゾイル)-4-((5-フルオロ-6-(1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)ピペリジン-4-カルボン酸(化合物10)
1-(3-クロロ-2-フルオロベンゾイル)-4-((5-メトキシ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)ピペリジン-4-カルボン酸(化合物11)
1-(3-クロロ-2-フルオロベンゾイル)-4-((5-クロロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)ピペリジン-4-カルボン酸(化合物12)
1-(3-クロロ-2-フルオロベンゾイル)-4-((5-フルオロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)ピペリジン-4-カルボン酸(化合物13)
1-(3-クロロ-2-フルオロベンゾイル)-4-((5-フルオロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)-N-メチルピペリジン-4-カルボキシアミド(化合物14)
アゼチジン-1-イル(1-(3-クロロ-2-フルオロベンゾイル)-4-((5-フルオロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)ピペリジン-4-イル)メタノン(化合物19)
(1-(3-クロロ-2-フルオロベンゾイル)-4-((5-フルオロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)ピペリジン-4-イル)(イソキサゾリジン-2-イル)メタノン(化合物21)
(3-クロロ-2-フルオロフェニル)(4-((5-フルオロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)-4-(5-メチル-1,2,4-オキサジアゾール-3-イル)ピペリジン-1-イル)メタノン(化合物22)
(2,3-ジクロロフェニル)(4-((5-フルオロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)-4-(5-メチル-1,2,4-オキサジアゾール-3-イル)ピペリジン-1-イル)メタノン(化合物23)
(3-クロロ-2-フルオロフェニル)(4-((5-フルオロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)-4-(1,2,4-オキサジアゾール-3-イル)ピペリジン-1-イル)メタノン(化合物24)
(3-クロロ-2-フルオロフェニル)(4-((5-フルオロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)-4-(5-メチル-1,3,4-オキサジアゾール-3-イル)ピペリジン-1-イル)メタノン(化合物28)
(3-クロロ-2-フルオロフェニル)(4-((5-フルオロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)-4-(3-メチル-1,2,4-オキサジアゾール-5-イル)ピペリジン-1-イル)メタノン(化合物29)
本発明化合物(I)は、例えば、下記の製造法又は実施例に示す方法等により製造することができる。ただし、本発明化合物(I)の製造法はこれら反応例に限定されるものではない。本発明の化合物の合成に必要な原料は市販、又は文献等による製法で容易に製造できる。
このようにして得られる化合物(IV)は、公知の分離精製手段、例えば濃縮、減圧濃縮、結晶化、溶媒抽出、再沈殿、クロマトグラフィー等により単離精製するか又は単離精製することなく次工程に付すことができる。
本工程は、化合物(IV)と化合物(V)とのカップリング反応により、化合物(VI)を製造する方法である。本工程で用いられる化合物(V)(化合物(V-1)または化合物(V-2))としては1-tert-ブチル-3-メチル-1H-ピラゾール-5-アミン、1-tert-ブチル-1H-ピラゾール-5-アミン、1-{[2-(トリメチルシリル)エトキシ]メチル}-1H-ピラゾール-3-アミン、5-メチル-1-{[2-(トリメチルシリル)エトキシ]メチル}-1H-ピラゾール-3-アミン等が挙げられる。化合物(V)は市販で入手できるか、又は公知の方法に従い製造することができる。
このようにして得られる化合物(VI)は、公知の分離精製手段、例えば濃縮、減圧濃縮、結晶化、溶媒抽出、再沈殿、クロマトグラフィー等により単離精製するか又は単離精製することなく次工程に付すことができる。
本工程は、化合物(VI)の保護基であるtert-ブトキシカルボニル基を酸存在下に脱保護し、化合物(VII)を製造する方法である。本工程で用いる反応条件は、文献記載の方法(Protective Groups in Organic Synthesis、T.W.Greene著、John Wiley & Sons社(1981年))又はそれに準じた方法に従って行うことができる。例えば、用いる酸としてはトリフルオロ酢酸、塩酸、硫酸、メタンスルホン酸、トルエンスルホン酸が挙げられ、0.1~100当量用いることができ、好ましくは1~10当量である。反応温度は0~200℃であり、好ましくは室温~100℃である。反応時間は0.1~100時間であり、好ましくは0.5~20時間である。本反応で用いる溶媒は、反応に支障のないものであれば特に制限はなく、クロロホルム、アセトニトリル、トルエン、テトラヒドロフラン、ジオキサン、水、酢酸等が挙げられ、これらを単独で又は混合して用いることができる。
このようにして得られる化合物(VII)は、公知の分離精製手段、例えば濃縮、減圧濃縮、結晶化、溶媒抽出、再沈殿、クロマトグラフィー等により単離精製するか又は単離精製することなく次工程に付すことができる。
本工程は、化合物(VII)と化合物(VIII)の脱水縮合反応によって、化合物(IX)を得る反応である。本工程で用いられる化合物(VIII)としては、例えば、2-フルオロ-3-クロロ安息香酸、2,3-ジクロロ安息香酸等が挙げられる。化合物(VIII)は市販で入手できるか、又は公知の方法に従い製造することができる。本工程では一般的に用いられている縮合剤を用いて公知の方法に従って、化合物(IX)を得ることができる。縮合剤として、N,N'-ジシクロヘキシルカルボジイミド(DCC)、N,N'-ジイソプロピルカルボジイミド(DIC)、1-エチル-3-(3-ジメチルアミノプロピル)カルボジイミド塩酸塩(WSC)、ジフェニルホスホリルアジド(DPPA)、(ベンゾトリアゾール-1-イル-オキシ)トリスジメチルアミノホスホニウムヘキサフルオロホスフェート(BOP)、(ベンゾトリアゾール-1-イル-オキシ)トリピロリジノホスホニウムヘキサフルオロホスフェート(PyBOP)、(7-アザベンゾトリアゾール-1-イルオキシ)トリスピロリジノホスホニウムホスフェート(PyAOP)、ブロモトリスピロリジノホスホニウムヘキサフルオロホスフェート(BroP)、クロロトリス(ピロリジン-1-イル)ホスホニウムヘキサフルオロホスフェート(PyCroP)、3-(ジエトキシホスホリロキシ)-1,2,3-ベンゾトリアジン-4(3H)-オン(DEPBT)、O-(ベンゾトリアゾール-1-イル)-N,N,N',N'-テトラメチルウロニウムヘキサフルオロホスフェート(HATU)、4-(5,6-ジメトキシ-1,3,5-トリアジン-2-イル)-4-メチルモルホリン塩酸塩(DMTMM)等が挙げられる。そのときの添加剤として1-ヒドロキシベンゾトリアゾール(HOBt)、1-ヒドロキシ-7-アザベンゾトリアゾール(HOAt)、N-ヒドロキシスクシンイミド(HOSu)等が挙げられ、これらを0.1~100当量用いることができ、好ましくは1~10当量である。必要に応じてトリメチルアミン、トリエチルアミン、トリプロピルアミン、ジイソプロピルエチルアミン、N-メチルモルホリン、ピリジン、4-(N,N-ジメチルアミノ)ピリジン、ルチジン、コリジン等の塩基を0.1~100当量用いることができ、好ましくは1~10当量である。溶媒としては特に制限はないが、水、メタノール、エタノール、2-プロパノール、テトラヒドロフラン、1,4-ジオキサン、トルエン、塩化メチレン、クロロホルム、アセトニトリル、N,N-ジメチルホルムアミド、N,N,-ジメチルアセトアミド、ジメチルスルホキシド等を用いることができる。反応温度は-30~200℃であり、好ましくは0~50℃である。反応時間は0.1~100時間で、好ましくは0.5~24時間である。
このようにして得られる化合物(IX)は、公知の分離精製手段、例えば濃縮、減圧濃縮、結晶化、溶媒抽出、再沈殿、クロマトグラフィー等により単離精製するか又は単離精製することなく次行程に付すことができる。
本工程は、化合物(IX)のシアノ基の加水分解と置換基Z中の保護基(P)の脱保護を酸性条件下で同時に行い、化合物(I-1)を製造する方法である。例えば、用いる酸としては、塩酸、硫酸、メタンスルホン酸、トルエンスルホン酸、トリフルオロ酢酸が挙げられ、0.1~100当量用いることができ、好ましくは1~10当量である。反応温度は室温~200℃であり、好ましくは60~130℃である。反応時間は0.1~100時間であり、好ましくは0.5~20時間である。本反応で用いる溶媒は、反応に支障のないものであれば特に制限はなく、ジオキサン、水、酢酸、トルエン、テトラヒドロフラン、2-プロパノール等が挙げられ、これらを単独で又は混合して用いることができる。このようにして得られる化合物(I-1)は、公知の分離精製手段、例えば濃縮、減圧濃縮、結晶化、溶媒抽出、再沈殿、クロマトグラフィー等により単離精製することができる。
本工程は、製造法1で得られた化合物(I-1)と化合物(X)の脱水縮合反応によって、化合物(I-2)を製造する方法である。本工程で用いられる化合物(X)としては、例えば、メチルアミン、ジメチルアミン、塩化アンモニウム、シクロプロピルアミン、ピロリジン等のアミン及びその塩が挙げられる。化合物(X)は市販で入手できるか、又は公知の方法に従い製造することができる。本工程では一般的に用いられている縮合剤を用いて公知の方法に従って、化合物(I-2)を得ることができる。縮合剤として、N,N'-ジシクロヘキシルカルボジイミド(DCC)、N,N'-ジイソプロピルカルボジイミド(DIC)、1-エチル-3-(3-ジメチルアミノプロピル)カルボジイミド塩酸塩(WSC)、ジフェニルホスホリルアジド(DPPA)、(ベンゾトリアゾール-1-イル-オキシ)トリスジメチルアミノホスホニウムヘキサフルオロホスフェート(BOP)、(ベンゾトリアゾール-1-イル-オキシ)トリピロリジノホスホニウムヘキサフルオロホスフェート(PyBOP)、(7-アザベンゾトリアゾール-1-イルオキシ)トリスピロリジノホスホニウムホスフェート(PyAOP)、ブロモトリスピロリジノホスホニウムヘキサフルオロホスフェート(BroP)、クロロトリス(ピロリジン-1-イル)ホスホニウムヘキサフルオロホスフェート(PyCroP)、3-(ジエトキシホスホリロキシ)-1,2,3-ベンゾトリアジン-4(3H)-オン(DEPBT)、O-(ベンゾトリアゾール-1-イル)-N,N,N',N'-テトラメチルウロニウムヘキサフルオロホスフェート(HATU)、4-(5,6-ジメトキシ-1,3,5-トリアジン-2-イル)-4-メチルモルホリン塩酸塩(DMTMM)等が挙げられる。そのときの添加剤として1-ヒドロキシベンゾトリアゾール(HOBt)、1-ヒドロキシ-7-アザベンゾトリアゾール(HOAt)、N-ヒドロキシスクシンイミド(HOSu)等が挙げられ、これらを0.1~100当量用いることができ、好ましくは1~10当量である。必要に応じてトリメチルアミン、トリエチルアミン、トリプロピルアミン、ジイソプロピルエチルアミン、N-メチルモルホリン、ピリジン、4-(N,N-ジメチルアミノ)ピリジン、ルチジン、コリジン等の塩基を0.1~100当量用いることができ、好ましくは1~10当量である。溶媒としては特に制限はないが、水、メタノール、エタノール、2-プロパノール、テトラヒドロフラン、1,4-ジオキサン、トルエン、塩化メチレン、クロロホルム、アセトニトリル、N,N-ジメチルホルムアミド、N,N,-ジメチルアセトアミド、ジメチルスルホキシド等を用いることができる。反応温度は-30~200℃であり、好ましくは0~50℃である。反応時間は0.1~100時間で、好ましくは0.5~24時間である。
このようにして得られる化合物(I-2)は、公知の分離精製手段、例えば濃縮、減圧濃縮、結晶化、溶媒抽出、再沈殿、クロマトグラフィー等により単離精製することができる。
本工程は、製造法1で製造中間体として得られた化合物(VI)のシアノ基をアミドオキシムへ変換し、化合物(XI)を製造する方法である。本工程で用いる反応は、例えば国際公開WO2005/026123号パンフレット、国際公開WO2008/117175号パンフレット、国際公開WO2008/156721号パンフレット等に記載の方法又はそれに準じた方法に従って行うことができる。例えば、化合物(VI)を、エタノール、2-プロパノール等のアルコール溶媒中、ヒドロキシルアミンと反応させることにより行うことができる。必要に応じて塩基を用いてもよく、塩基としては、トリエチルアミン、ジイソプロピルエチルアミン、N-メチルモルホリン、ピリジン等の有機アミン類や炭酸水素ナトリウム、炭酸ナトリウム、炭酸カリウム、炭酸セシウム、ナトリウムメトキシド、ナトリウムエトキシド、カリウムtert-ブトキシド等の無機塩類が挙げられる。ヒドロキシルアミンは、1~100当量用いることができ、好ましくは1~10当量である。反応温度は室温~150℃であり、好ましくは50~100℃である。反応時間は0.1~100時間であり、好ましくは0.5~20時間である。
このようにして得られる化合物(XI)は、公知の分離精製手段、例えば濃縮、減圧濃縮、結晶化、溶媒抽出、再沈殿、クロマトグラフィー等により単離精製するか又は単離精製することなく次工程に付すことができる。
本工程は、化合物(XI)のアミドオキシム基を1,2,4-オキサジアゾール環へ変換し、化合物(XII)を製造する方法である。本工程で用いる反応は、例えば国際公開WO2005/026123号パンフレット、国際公開WO2008/117175号パンフレット、国際公開WO2008/156721号パンフレット等に記載の方法又はそれに準じた方法に従って行うことができる。例えば、化合物(XI)を、トルエン、クロロホルム、酢酸、N,N-ジメチルホルムアミド、N-メチルピロリジン-2-オン、ピリジン等の溶媒中、無水酢酸、塩化アセチル、オルトギ酸トリエチル、オルト酢酸トリエチル等と反応させることにより行うことができる。必要に応じて塩基を用いてもよく、塩基としては、トリエチルアミン、ジイソプロピルエチルアミン、N-メチルモルホリン、ピリジン等が挙げられる。反応温度は室温~150℃であり、好ましくは50~100℃である。反応時間は0.1~100時間であり、好ましくは0.5~20時間である。
このようにして得られる化合物(XII)は、公知の分離精製手段、例えば濃縮、減圧濃縮、結晶化、溶媒抽出、再沈殿、クロマトグラフィー等により単離精製するか又は単離精製することなく次工程に付すことができる。
化合物(XII)の保護基であるtert-ブトキシカルボニル基を酸存在下に脱保護し、化合物(XIII)を製造する方法である。本工程は前記工程3と同様の方法、又はこれに準じた方法で行うことができる。
このようにして得られる化合物(XIII)は、公知の分離精製手段、例えば濃縮、減圧濃縮、結晶化、溶媒抽出、再沈殿、クロマトグラフィー等により単離精製するか又は単離精製することなく次工程に付すことができる。
本工程は、化合物(XIII)と化合物(VIII)の脱水縮合反応によって、化合物(XIV)を製造する方法である。本工程は前記工程4と同様の方法、又はこれに準じた方法で行うことができる。
このようにして得られる化合物(XIV)は、公知の分離精製手段、例えば濃縮、減圧濃縮、結晶化、溶媒抽出、再沈殿、クロマトグラフィー等により単離精製するか又は単離精製することなく次工程に付すことができる。
本工程は、化合物(XIV)の置換基Z中の保護基(P)を酸存在下に脱保護し、化合物(I-3)を製造する方法である。本工程は前記第5工程と同様の方法、又はこれに準じた方法で行うことができる。
このようにして得られる化合物(I-3)は、公知の分離精製手段、例えば濃縮、減圧濃縮、結晶化、溶媒抽出、再沈殿、クロマトグラフィー等により単離精製することができる。
本工程は、製造法1で得られた化合物(I-1)とtert-ブトキシカルボニルヒドラジドの脱水縮合反応によって、化合物(XV)を製造する方法である。本工程は前記工程4と同様の方法、又はこれに準じた方法で行うことができる。
このようにして得られる化合物(XV)は、公知の分離精製手段、例えば濃縮、減圧濃縮、結晶化、溶媒抽出、再沈殿、クロマトグラフィー等により単離精製するか又は単離精製することなく次工程に付すことができる。
(工程13)
化合物(XV)の保護基であるtert-ブトキシカルボニル基を酸存在下に脱保護し、化合物(XVI)を製造する方法である。本工程は前記工程3と同様の方法、又はこれに準じた方法で行うことができる。
このようにして得られる化合物(XVI)は、公知の分離精製手段、例えば濃縮、減圧濃縮、結晶化、溶媒抽出、再沈殿、クロマトグラフィー等により単離精製するか又は単離精製することなく次工程に付すことができる。
(工程14)
本工程は、化合物(XVI)のアシルヒドラジド基を1,3,4-オキサジアゾール環へ変換し、化合物(I-4)を製造する方法である。本工程は前記工程8と同様の方法、又はこれに準じた方法で行うことができる。
このようにして得られる化合物(I-4)は、公知の分離精製手段、例えば濃縮、減圧濃縮、結晶化、溶媒抽出、再沈殿、クロマトグラフィー等により単離精製するか又は単離精製することなく次工程に付すことができる。
該塩基付加塩としては、例えばナトリウム塩、カリウム塩等のアルカリ金属塩;例えばカルシウム塩、マグネシウム塩等のアルカリ土類金属塩;例えばアンモニウム塩;例えばトリメチルアミン塩、トリエチルアミン塩、ジシクロヘキシルアミン塩、エタノールアミン塩、ジエタノールアミン塩、トリエタノールアミン塩、プロカイン塩、N,N'-ジベンジルエチレンジアミン塩等の有機アミン塩等が挙げられる。
該酸付加塩としては、例えば塩酸塩、硫酸塩、硝酸塩、リン酸塩、過塩素酸塩等の無機酸塩;例えば酢酸塩、ギ酸塩、マレイン酸塩、フマール酸塩、酒石酸塩、クエン酸塩、アスコルビン酸塩、トリフルオロ酢酸塩等の有機酸塩;例えばメタンスルホン酸塩、イセチオン酸塩、ベンゼンスルホン酸塩、p-トルエンスルホン酸塩等のスルホン酸塩等が挙げられる。
また、上記投与形態を有する薬剤の1日あたりの投与量は、患者の症状、体重、年齢、性別等によって異なり一概には決定できないが、本発明化合物として通常成人(体重50kg)1日あたり0.05~5000mg、好ましくは0.1~1000mgとすればよく、これを1日1回又は2~3回程度に分けて投与するのが好ましい。
実施例で用いた各種試薬は、特に記載の無い限り市販品を使用した。シリカゲルカラムクロマトグラフィーには、モリテックス社製プリフパック(登録商標)SI、バイオタージ社製KP-Sil(登録商標)Silicaプレパックドカラム、又はバイオタージ社製HP-Sil(登録商標)Silicaプレパックドカラムを用いた。塩基性シリカゲルカラムクロマトグラフィーにはモリテックス社製プリフパック(登録商標)NH又はバイオタージ社製KP-NH(登録商標)プレパックドカラムを用いた。分取用薄層クロマトグラフィーにはメルク社製KieselgelTM60F254,Art.5744又は和光社NH2シリカゲル60F254プレートを用いた。NMRスペクトルは、AL400(400MHz;日本電子(JEOL))、Mercury400(400MHz;アジレント・テクノロジー)型スペクトロメータ、又はOMNMRプローブ(Protasis)を装備したInova400(400MHz;アジレント・テクノロジー)型スペクトロメータを使用し、重溶媒中にテトラメチルシランを含む場合は内部基準としてテトラメチルシランを用い、それ以外の場合には内部基準としてNMR溶媒を用いて測定し、全δ値をppmで示した。マイクロウェーブ反応は、バイオタージ社製Initiator8を用いて行った。
またLCMSスペクトルはWaters社製ACQUITY SQD(四重極型)を用いた。
s:シングレット
d:ダブレット
t:トリプレット
dd:ダブル ダブレット
m:マルチプレット
br:ブロード
brs:ブロードシングレット
DMSO-d6:重ジメチルスルホキシド
CDCl3:重クロロホルム
CD3OD:重メタノール
Xantphos:4,5-ビス(ジフェニルホスフィノ)-9,9-ジメチルキサンテン
Pd2(dba)3:トリス(ジベンジリデンアセトン)ジパラジウム(0)
K3PO4:リン酸三カリウム
MsOH:メシル酸
AIBN:アゾビスイソブチロニトリル
HPMC:ヒドロキシプロピルメチルセルロース
1-(2,3-ジクロロベンゾイル)-4-((5-フルオロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)ピペリジン-4-カルボン酸(化合物1)の合成
(工程a)tert-ブチル4-((6-ブロモ-5-フルオロピリジン-2-イル)メチル)-4-シアノピペリジン-1-カルボキシレートの合成
N-Boc-4-シアノピペリジン(5.35g,25.4mmol)をテトラヒドロフラン100mLに溶解し、-78℃に冷却した後、リチウムジイソプロピルアミド・テトラヒドロフラン錯体のシクロヘキサン溶液(1.5M,16.5mL,24.8mmol)を、内温を-70℃以下に保ったまま加えた。反応混合物を-78℃にて20分間撹拌した。得られた反応混合物に、2-ブロモ-6-(ブロモメチル)-3-フロオロピリジン(6.28g,23.4mmol)のTHF溶液10mLを、内温を-70℃以下に保ったまま加えた後、-78℃にて20分間撹拌した。反応溶液に、塩酸(5M,4.95mL,24.8mmol)と、飽和塩化アンモニウム水溶液95mLの混合物を加え、室温にて攪拌した後、酢酸エチルにて抽出した。抽出液を飽和食塩水にて洗浄し、無水硫酸ナトリウムにて乾燥後、濾過、濃縮した。タール状の残渣を酢酸エチル6mLに溶解し、攪拌しながらヘプタン50mLを滴下し、種結晶を加え、室温にて1時間攪拌した。生じた淡黄色懸濁液に、さらにヘプタン50mLを滴下した後、終夜攪拌した。得られた固体を濾取し、酢酸エチルのヘプタン溶液にて洗浄後、減圧乾燥し、目的物をオフホワイト固体(7.10g,17.8mmol)として得た(収率76%)。物性値を以下に示す。
1H-NMR(CDCl3)δ:7.45(1H,t,J=8.1Hz),7.31(1H,dd,J=8.1,3.5Hz),4.16(2H,br),3.09-2.93(2H,m),3.04(2H,s),1.95-1.84(2H,m),1.68-1.57(2H,m),1.48(9H,s);ESI-MS m/z298,300(MH+).
上記工程aで得られた化合物(6.37g,16.0mmol)、5-アミノ-1-t-ブチル-3-メチルピラゾール(2.42g,15.8mmol)、Xantphos(65.9mg,114μmol)、Pd2(dba)3(51.1mg,55.8μmol)、K3PO4(3.63g,17.1mmol)を反応容器に入れ、最後にトルエン50mLを加え、脱気、アルゴン置換した。得られた混合物を110℃にて8時間攪拌した後、室温にて酢酸エチル200mLを加えた。得られた混合物を、水、飽和食塩水にて洗浄し、硫酸ナトリウムにて乾燥後、濾過、濃縮した。残渣を酢酸エチル10mLに溶解し、75℃にて攪拌しながらヘプタン40mLを加えた後、室温にて終夜攪拌した。生じた個体を濾取し、15%酢酸エチル/ヘプタンにて洗浄後、減圧乾燥し、目的化合物(4.15g,8.81mmol)を白色固体として得た(収率56%)。物性値を以下に示す。
1H-NMR(CDCl3)δ:7.26(1H,dd,J=10.7,8.0Hz),6.74(1H,dd,J=8.0,3.2Hz),6.23-6.15(2H,m),4.19-3.92(2H,m),3.09-2.92(2H,m),2.85(2H,s),2.26(3H,s),1.95-1.86(2H,m),1.64(9H,s),1.58-1.48(2H,m),1.46(9H,s);ESI-MS m/z471(MH+).
上記工程bで得られた化合物 (4.11g,8.73mmol)をTHF(33mL)に溶解し、水浴上でMsOH(7.0mL)を加えた。得られた溶液を室温にて2時間攪拌後、内容物を水160mLに注いだ。得られた水溶液をイソプロピルエーテル50mLにて洗浄した後、5M水酸化ナトリウム21.5mLを加え、酢酸エチルにて抽出した。得られた酢酸エチル溶液を飽和食塩水にて洗浄後、無水硫酸ナトリウムにて乾燥した。濾過後、濾液を濃縮し、目的化合物(3.09g,8.34mmol)を得た(収率96%)。物性値を以下に示す。
1H-NMR(CDCl3)δ:7.22(1H,dd,J=10.6,8.0Hz),6.71(1H,dd,J=8.0,3.2Hz),6.25-6.16(2H,m),3.02-2.95(2H,m),2.91-2.84(2H,m),2.83(2H,s),2.21(3H,s),1.90-1.83(2H,m),1.61(9H,s),1.59-1.49(2H,m);ESI-MS m/z371(MH+).
上記工程cで得られた化合物 (3.65g,9.85mmol)、2,3-ジクロロ安息香酸(2.05g,10.8mmol)、1-ヒドロキシベンゾトリアゾール一水和物(1.80g,13.3mmol)の混合物にアセトニトリル25mLを加えた後、WSC塩酸塩(2.05g,10.7mmol)を加えた。反応混合物を室温にて終夜攪拌した後、1M水酸化ナトリウム30mLを加え、15分間攪拌した。得られた混合物を酢酸エチルにて抽出した。酢酸エチル層を水、1M塩酸、水、飽和食塩水にて順に洗浄した。得られた酢酸エチル溶液を無水硫酸ナトリウムにて洗浄後、濾過、濃縮し、目的物化合物(5.55g)を、白色固体として得た(収率100%)。物性値を以下に示す。
ESI-MS m/z543,545(MH+).
上記工程dで得られた化合物(524mg,0.964mmol)を1,4-ジオキサン3mLに溶解した後、5M塩酸3mLを加え、マイクロウェーブ反応装置にて、150℃で10分間加熱した。反応混合物を減圧濃縮後、得られた残渣をクロロホルムに溶解し、飽和食塩水にて洗浄した。得られたクロロホルム溶液を無水硫酸ナトリウムにて乾燥後、濾過、減圧濃縮した。残渣をシリカゲルカラムクロマトグラフィー(クロロホルム/メタノール=100/0~90/10)にて精製後、得られた固体をエタノール-酢酸エチルにて再沈殿し、目的化合物(290mg,0.573mmol)を白色固体として得た(収率59%)。物性値を表9に示す。
実施例2~13については、表1~表3に記載の原料を使用し、実施例1に準じた方法により合成した。物性値を表9~表17に示す。
1-(3-クロロ-2-フルオロベンゾイル)-4-((5-フルオロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)-N-メチルピペリジン-4-カルボキシアミド(化合物14)の合成
実施例13で得られた化合物13(50mg,0.1mmol)、1-エチル-3-(3-ジメチルアミノプロピル)カルボジイミド塩酸塩(40mg,0.21mmol)、1-ヒドロキシベンゾトリアゾール一水和物(30mg,0.22mmol)、メチルアミン塩酸塩(25mg,0.37mmol)、ジメチルホルムアミド1mLの混合物に、トリエチルアミン0.05mLを加え、室温にて13時間攪拌した。反応混合物に水を加え、酢酸エチルにて抽出後、無水硫酸マグネシウムにて乾燥し、濾過、濃縮した。得られた残渣をHPLCにて精製し、目的化合物(41mg,0.082mmol)を白色固体として得た(収率82%)。物性値を表9~表17に示す。
実施例15~21については、表4~表5に記載の原料を使用し、実施例14に準じた方法により合成した。物性値を表9~表17に示す。
(3-クロロ-2-フルオロフェニル)(4-((5-フルオロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)-4-(5-メチル-1,2,4-オキサジアゾール-3-イル)ピペリジン-1-イル)メタノン(化合物22)の合成
(工程a)tert-ブチル4-((6-(1-tert-ブチル-3-メチル-1H-ピラゾール-5-イルアミノ)-5-フルオロピリジン-2-イル)メチル)-4-(N'-ヒドロキシカルバミミドイル)ピペリジン-1-カルボキシレートの合成
実施例1(工程b)で得られた化合物(50g)をエタノール530mLに60℃にて溶解させ、室温に戻し50%ヒドロキシルアミン水溶液65mLを加え、60℃にて46時間攪拌した。反応液を蒸留水に加え、酢酸エチルで抽出し、有機層を蒸留水、飽和食塩水で洗浄した。これを硫酸ナトリウムで乾燥させて減圧濃縮し、目的化合物(53g,106mmol)を得た(収率100%)。物性値を以下に示す。
ESI-MS m/z504(MH+).
上記工程aで得られた化合物(53g,106mmol)をトルエン525mLに懸濁させ、無水酢酸10mLを加え、室温で1時間20分、その後100℃にて16時間攪拌した。反応溶液に氷浴下、アンモニア水175mL、蒸留水500mL、酢酸エチル500mLを順に加え、飽和食塩水で洗浄した。水層を酢酸エチルで抽出し、有機層を飽和食塩水で洗浄、硫酸ナトリウムで乾燥後、減圧濃縮し、目的化合物(58g)を粗精製物として得た。物性値を以下に示す。
ESI-MS m/z528(MH+).
上記工程bで得られた化合物(57g)をアセトニトリル210mLに溶解させ、氷浴下、メシル酸27mLを加え、氷浴下1時間、室温にて17時間攪拌した。反応溶液を氷浴下蒸留水500mLに加え、ジイソプロピルエーテル500mLで洗浄した。水層に氷浴下、5M水酸化ナトリウム100mLを加え、水層を酢酸エチルで抽出した。有機層を飽和食塩水で洗浄後、硫酸ナトリウムで乾燥させて減圧濃縮し、目的化合物(44g,102mmol)を得た(収率91%)。物性値を以下に示す。
ESI-MS m/z428(MH+).
上記工程cで得られた化合物(44g)、3-クロロ-2-フルオロ安息香酸(20g)、1-ヒドロキシベンゾトリアゾール一水和物(21g)をアセトニトリル343mLに溶解させ、氷浴下、1-エチル-3-(3-ジメチルアミノプロピル)カルボジイミド塩酸塩(22g)を加え、室温にて15時間攪拌した。反応液に1M水酸化ナトリウム(500mL)を加え、酢酸エチルで抽出した。有機層を蒸留水、1M塩酸、蒸留水、飽和食塩水で洗浄し、硫酸ナトリウムで乾燥後、減圧濃縮した。残渣をヘプタン-酢酸エチルより結晶化を行い、目的化合物(52g,89mmol)を得た(収率86%)。物性値を以下に示す。
ESI-MS m/z584,586(MH+).
上記工程dで得られた化合物(2.94g,5.03mmol)を5M塩酸30mL及び2-プロパノール20mLに溶解し、100℃で2時間加熱した。反応液を氷冷し、水及び5M水酸化ナトリウムを加え、pHを約8に調整した後、酢酸エチルで抽出した。抽出液を水及び飽和食塩水で洗浄し、硫酸ナトリウムで乾燥後、減圧濃縮した。残渣をシリカゲルカラムクロマトグラフィー(クロロホルム/メタノール=100/0~95/5)で精製し、目的物化合物(2.26g,4.28mmol)を得た(収率85%)。物性値を表9~表17に示す。
実施例23~27については、表6~表7に記載の原料を使用し、実施例22に準じた方法により合成した。物性値は表9~表17に示す。
(3-クロロ-2-フルオロフェニル)(4-((5-フルオロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)-4-(5-メチル-1,3,4-オキサジアゾール-3-イル)ピペリジン-1-イル)メタノン(化合物28)の合成
(工程a)tert-ブチル 2-(1-(3-クロロ-2-フルオロベンゾイル)-4-((5-フルオロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)ピペリジン-4-カルボニル)ヒドラジンカルボキシレートの合成
実施例13で得られた化合物13(62mg,0.13mmol)、tert-ブトキシカルボニル ヒドラジド(25mg,0.19mmol)、1-ヒドロキシベンゾトリアゾール一水和物(30mg,0.22mmol)をジメチルホルムアミド3mLに溶解し、(1-エチル-3-(3-ジメチルアミノプロピル)カルボジイミド塩酸塩(41mg,0.22mmol)を加え、室温にて3時間攪拌した。反応混合物に水を加え、酢酸エチルにて抽出後、無水硫酸マグネシウムにて乾燥し、濾過、濃縮した。得られた残渣をシリカゲルカラムクロマトグラフィー(クロロホルム/メタノール=100/0~95/5)で精製し、目的化合物(70mg,0.12mmol)を得た(収率92%)。物性値を以下に示す。
ESI-MS m/z604,606(MH+).
上記工程aで得られた化合物(70mg,0.12mmol)をクロロホルム4mLに溶解し、トリフルオロ酢酸2mLを加え、室温にて3時間攪拌した。反応混合物を濃縮後、残渣にクロロホルムと飽和炭酸水素ナトリウム水溶液を加え分液した。クロロホルム抽出液を、無水硫酸マグネシウムにて乾燥し、濾過、濃縮した。得られた残渣にトルエン4mLとオルト酢酸エチル0.5mLを加え、110℃で2時間加熱攪拌した。反応液に水を室温で加え、酢酸エチルで抽出した。抽出液を無水硫酸マグネシウムにて乾燥し、濾過、濃縮した。得られた残渣をシリカゲルカラムクロマトグラフィー(クロロホルム/メタノール=100/0~90/10)で精製し、目的化合物(39mg,0.077mmol)を得た(収率64%)。物性値を表9~表17に示す。
(3-クロロ-2-フルオロフェニル)(4-((5-フルオロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)-4-(3-メチル-1,2,4-オキサジアゾール-5-イル)ピペリジン-1-イル)メタノン(化合物29)の合成
実施例13で得られた化合物13(49mg,0.10mmol)、1-エチル-3-(3-ジメチルアミノプロピル)カルボジイミド塩酸塩(38mg,0.20mmol)、1-ヒドロキシベンゾトリアゾール一水和物(27mg,0.20mmol)、アセトアミドオキシム(15mg,0.20mmol)、ジメチルホルムアミド(1mL)の混合物に、ジイソプロピルエチルアミン(0.07mL)を加え、室温にて7時間攪拌した。反応混合物に水を加え、酢酸エチルにて抽出後、無水硫酸ナトリウムにて乾燥し、濾過、濃縮した。得られた粗生成物に1,4-ジオキサン(1mL)を加え、マイクロウェーブ反応装置(BiotageInitiator8)を用いて120℃で6時間撹拌照射した。濃縮後得られた残渣をHPLCにて精製し、目的化合物(29mg、0.055mmol)を淡橙色固体として得た(収率55%)。物性値を表9~表17に示す。
5-(1-(3-クロロ-2-フルオロベンゾイル)-4-((6-(1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)ピペリジン-4-イル)-1,3,4-オキサジアゾール-2(3H)-オン(比較化合物1)の合成
国際公開WO2009/104802号パンフレットに記載の方法に準じて、以下のように合成した。5-(4-((6-((1-tert-ブチル-1H-ピラゾール-5-イル)アミノ)ピリジン-2-イル)メチル)-1-(3-クロロ-2-フルオロベンゾイル)ピペリジン-4-イル)-1,3,4-オキサジアゾール-2-(3H)-オン(4.45g、8.03mmol)に、5M塩酸(40mL)及び2-プロパノール(40mL)を加え100℃、4時間撹拌した。反応混合物に5M水酸化ナトリウム(40mL)を加えた後、クロロホルムで分液抽出した。クロロホルム抽出液を、無水硫酸マグネシウムにて乾燥し、濾過、濃縮した。得られた残渣をシリカゲルカラムクロマトグラフィー(クロロホルム/メタノール=100/0~95/5)で精製後、酢酸エチル中で攪拌洗浄し、目的化合物(1.63g,3.29mmol)を淡橙色固体として得た(収率41%)。物性値を表18に示す。
比較例2~5及び7は、表8に記載の原料を使用し、実施例1に準じた方法に従って合成した。物性値を表18に示す。
1-(3-クロロ-2-フルオロベンゾイル)-4-((5-シアノ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)ピペリジン-4-カルボン酸(比較化合物6)の合成
(工程a)tert-ブチル 4-エチル 4-((5-ブロモ-6-クロロピリジン-2-イル)メチル)ピペリジン-1,4-ジカルボキシレートの合成
3-ブロモ-2-クロロ-6-メチルピリジン(880mg,4.26mmol)を四塩化炭素21mLに溶解し、N-ブロモスクシンイミド(682mg,3.83mmol)及びAIBN(70mg、0.426mmol)を加え90℃で1時間攪拌した。反応液を濃縮後、得られた残渣をシリカゲルカラムクロマトグラフィー(クロロホルム/メタノール=100/0~95/5)で精製し、3-ブロモ-6-(ブロモメチル)-2-クロロピリジンを粗精製物として得た。
N-Bocピペリジンカルボン酸エチルエステル(1.16mL,4.72mmol)をテトラヒドロフラン18mLに溶解し、リチウムジイソプロピルアミド・テトラヒドロフラン錯体のシクロヘキサン溶液(1.5M,3.3mL,4.96mmol)を-78℃で加え40分攪拌した。上記で得られた3-ブロモ-6-(ブロモメチル)-2-クロロピリジンのテトラヒドロフラン溶液2mLを滴下し、さらに10分間攪拌した。反応液に飽和塩化アンモニウム水溶液を加え昇温し、水及び酢酸エチルで分配した。酢酸エチル層を、飽和食塩水で洗浄後、無水硫酸マグネシウムにて乾燥し、濾過、濃縮した。得られた残渣をシリカゲルカラムクロマトグラフィー(ヘキサン/酢酸エチル=95/5~65/35)で精製後、目的化合物(592mg,1.28mmol)を得た(収率27%)。物性値を以下に示す。
ESI-MS m/z461,463,465(MH+).
上記工程aで得られた化合物(590mg、1.28mmol)をクロロホルム5mLに溶解し、トリフルオロ酢酸2mLを加え、室温で1時間攪拌した。反応液を濃縮し、DMF5mLに溶解した。1H-ベンゾ[b][1,2,3]-トリアゾール-1-イル 3-クロロ-2-フルオロベンゾエート(411mg,1.41mmol)及びN,N-ジイソプロピルエチルアミン(0.45mL,2.56mmol)を0℃で加え15分間攪拌した。水を加えた後、混合物を酢酸エチルにて抽出した。酢酸エチル層を水及び飽和食塩水で洗浄後、無水硫酸マグネシウムにて乾燥し、濾過、濃縮した。得られた残渣をシリカゲルカラムクロマトグラフィー(ヘキサン/酢酸エチル=90/10~50/50)で精製後、目的化合物(581mg,1.13mmol)を得た(収率88%)。物性値を以下に示す。
ESI-MS m/z517,519,521(MH+).
上記工程bで得られた化合物(310mg、0.598mmol)をエタノール6mLに溶解し、5M水酸化ナトリウム(0.96mL)を加え、80℃で1.5時間攪拌した。反応液を水で薄め、5M塩酸を加えpHを1とした後、酢酸エチルにて抽出した。酢酸エチル層を水及び飽和食塩水で洗浄後、無水硫酸マグネシウムにて乾燥し、濾過、濃縮した。得られた残渣をシリカゲルカラムクロマトグラフィー(ヘキサン/酢酸エチル=30/70~0/100→クロロホルム/メタノール=100/0~90/10)で精製後、目的化合物(259mg,0.526mmol)を得た(収率88%)。物性値を以下に示す。
ESI-MS m/z489,491,493(MH+).
上記工程cで得られた化合物(80mg,0.163mmol)及びシアン化銅(16mg,0.180mmol)にN-メチルピロリドン1mLを加え、マイクロウェーブ反応装置(BiotageInitiator8)を用いて195℃で40分間撹拌照射した。反応液を水で薄め、1M塩酸を加えた後、酢酸エチルにて抽出した。酢酸エチル層を水及び飽和食塩水で洗浄後、無水硫酸マグネシウムにて乾燥し、濾過、濃縮した。得られた残渣をシリカゲルカラムクロマトグラフィー(ヘキサン/酢酸エチル=50/50~0/100→クロロホルム/メタノール=100/0~90/10)で精製し、粗精製物として4-((5-シアノ-6-クロロピリジン-2-イル)メチル)-1-(3-クロロ-2-フルオロベンゾイル)ピペリジン-4-カルボン酸(9mg)を得た。ここで得られた粗精製物(9mg)、5-アミノ-1-tert-ブチル-3-メチルピラゾール(3.5mg,0.022mmol)、Xantphos(2.4mg,0.0041mmol)、Pd2(dba)3(2.0mg,0.0023mmol)及びリン酸カリウム(8.7mg,0.041mmol)にジオキサン0.2mLを加え、100℃で3.5時間撹拌した。反応液を水で薄め、酢酸エチルにて抽出した。酢酸エチル層を水及び飽和食塩水で洗浄後、無水硫酸マグネシウムにて乾燥し、濾過、濃縮した。得られた残渣をシリカゲルカラムクロマトグラフィー(ヘキサン/酢酸エチル=25/75~0/100→クロロホルム/メタノール=100/0~90/10)で精製し、粗精製物として4-((6-(1-tert-ブチル-5-メチル-1H-ピラゾール-3-イルアミノ)-5-シアノピリジン-2-イル)メチル)-1-イル)-1-(3-クロロ-2-フルオロベンゾイル)ピペリジン-4-カルボン酸(4mg)を得た。得られた粗精製物(4mg)をトリフルオロ酢酸0.5mL及びアニソール0.05mLに溶解し、85℃で1時間加熱攪拌した。濃縮後、得られた残渣を逆相HPLCにて精製し、目的化合物(1mg,0.002mmol)を得た(収率1%)。物性値を表18に示す。
被検化合物のオーロラA及びオーロラBに対する阻害活性は以下の方法に従って測定した。なお、対照化合物として臨床開発中のオーロラA選択的阻害剤であるMLN8237を使用した。
1)オーロラAタンパク質の精製
アミノ末端にヒスチジンタグを融合したヒトオーロラAのcDNAを発現ベクターに組み込み大腸菌BL21-CodonPlus(DE3)-RIL株で高発現させた。大腸菌を回収して可溶化した後、ヒスチジンタグ付加ヒトオーロラAタンパク質をニッケルキレートカラムに吸着させ、イミダゾールでカラムから溶出し、活性画分を脱塩カラムで脱塩し精製酵素とした。
2)オーロラA阻害活性の測定
オーロラAキナーゼ活性に対する上記化合物のインビトロでの阻害活性測定法は、特開2008-81492号公報に記載されている方法を参考にした。化合物の阻害活性測定においては、まず、被検化合物をジメチルスルホキシド(DMSO)で段階希釈した。次に、反応用緩衝液[50mM Tris-塩酸バッファー(pH7.4)、15mM 酢酸マグネシウム、0.2mM エチレンジアミン-N、N、N'、N'-四酢酸(EDTA)]中に精製ヒトオーロラA蛋白質、FL-Peptide 21(キャリパーライフサイエンス社、終濃度は100nM)、ATP(終濃度は5μM)と本発明化合物DMSO溶液(DMSOの終濃度は5%)を加えて25℃で50分間インキュベーションし、キナーゼ反応を行った。そこへモレキュラーデバイス社のIMAP(登録商標)Progressive Binding Buffer Aにて500倍希釈したIMAP(登録商標)Progressive Binding Reagentを加えてキナーゼ反応を停止させた。室温で暗所に120分間静置後に、PHERAstar(BMG LABTECH社、励起波長485nm、検出波長520nm)で測定して得られた蛍光偏光度よりリン酸化反応量を求め、リン酸化反応を50%抑制することのできる化合物濃度をIC50値(nM)と定義し、結果を表19に示した。
3)オーロラBキナーゼ活性の測定
オーロラBキナーゼ活性に対する被検化合物のインビトロでの阻害活性測定法はオーロラAとほぼ同様で、精製リコンビナントヒトオーロラB蛋白質はカルナバイオサイエンス株式会社より購入した。反応用緩衝液の組成は、20mM HEPES(pH7.4),2mM DTT,0.01% Tween-20、塩化マグネシウムの終濃度は1mM、ATPの終濃度は40μM、インキュベーション時間は60分間とした。リン酸化反応を50%抑制することのできる化合物濃度をIC50値(nM)と定義し、結果を表19に示した。
ヒト由来胃がん細胞株SNU-16細胞を、各々10%ウシ胎児血清(FBS)を含むRPMI-1640培地およびダルベッコ変法イーグル培地(DMEM)中で、80%を超えない細胞密度で日常的に継代した。細胞増殖抑制活性の試験を開始するため、各細胞を上記培地中に懸濁し、96ウェル平底プレート(底面が透明な黒色プレート)の各ウェルに1ウェルあたりの細胞数が2,500または3,000個となるように播種した後、5%炭酸ガス含有の培養器中37℃で1日間培養した。翌日、本発明化合物および対象化合物をDMSOに溶解し、DMSOを用いて被検化合物を終濃度の200倍の濃度になるように段階希釈した。被検化合物のDMSO溶液を培養に用いた培地で希釈し、これを細胞の培養プレートの各ウェルにDMSOの最終濃度が0.5%になるように加え、5%炭酸ガス含有の培養器中37℃で72時間培養した。被検化合物の添加時および72時間培養後の細胞数の計測は、CellTiter-Glo Luminescent Cell Viability Assayキット(プロメガ社製)を用いて、プロメガ社の推奨するプロトコールに基づき実施した。キット含有の試薬を各プレートに添加し撹拌後10分間室温で静置した。反応終了後、マイクロプレートリーダーを用いて、発光シグナルを測定した。
以下の式より細胞増殖阻害率を算出し、50%阻害する被検化合物の濃度(GI50(nM))を求め、表20に結果を示した。
細胞増殖阻害率(%)=(C-T)/(C-C0)×100
T:被検化合物を添加したウェルの発光シグナル
C:被検化合物を添加しなかったウェルの発光シグナル
C0:化合物添加前に測定したウェルの発光シグナル
被検化合物を0.5%HPMCに懸濁又は溶解し、BALB/cAマウスに経口投与した。経口投与後、0.5、1、2、4及び6時間後に眼底採血し血漿を得た。得られた血漿中の化合物濃度をLCMSにより測定し、経口吸収性の評価を行った。
結果、本発明化合物である実施例1、11、12、13及び22の化合物は、経口投与後に十分な血漿中濃度が観測され、良好な経口吸収性を示した。一方、比較例2~5及び7では十分な経口吸収性を示さず(AUC0-6hrは本発明化合物の1/8未満)、経口投与製剤に有効成分として含有させることは難しく、経口投与では臨床効果を期待できないと考えられた。このことから、一般式(I)で表される本発明化合物の構造において、ピリジン環上のR2としてハロゲン原子又はC1-C6アルコキシ基に導入することにより高い経口吸収性を与えることが判明した。
ルシフェラーゼ導入ヒト子宮頚部癌細胞株(Hela-Luc)をヌードマウスの皮下に移植し、腫瘍の生着した体積が100~200mm3になった時点で、各群の腫瘍体積が均一になるように、無作為層別化法により1群5匹を単剤群及び併用群に群分けした(1日目)。単剤群では、グループ1:パキリタキセル(30mg/kg)を1日目に静脈内投与、グループ2:本発明化合物(化合物1)(60mg/kg)を2日目及び3日目に1日2回経口投与、グループ3:比較化合物1(60mg/kg)を2日目及び3日目に1日2回経口投与した。併用群では、グループ4:パキリタキセル(30mg/kg)を1日目に静脈内投与し、化合物1(60mg/kg)を2日目及び3日目に1日2回経口投与、グループ5:パキリタキセル(30mg/kg)を1日目に静脈内投与し、比較化合物1(60mg/kg)を2日目及び3日目に1日2回経口投与した。薬剤投与における抗腫瘍効果を比較するため、腫瘍の増殖割合として群分け時の腫瘍体積を1とした相対腫瘍体積(RTV;Relative Tumor Volume)を以下の式に従って求めた。
また、J. Clin. Oncol., 29(31), p4129-4136,(2010)等に記載の病勢コントロール率(DCR;Disease Control Rate)も薬剤投与における抗腫瘍効果の指標として用いた。DCRは、腫瘍体積測定最終日(46日目)において、RTVが1を超えない個体の割合として定義し、以下の式に従って求め、結果を表21に示した。
試験例4と同様の方法により、ルシフェラーゼ導入ヒト子宮頚部癌細胞株(Hela-Luc)をヌードマウスの皮下に移植し、無作為層別化法により1群5匹を単剤群及び併用群に群分けした(1日目)。単剤群では、パキリタキセル(20mg/kg)を1日目に静脈内投与した。また、化合物13(30mg/kg)又は化合物22(100mg/kg)を2日目及び3日目に1日2回経口投与した。併用群では、パキリタキセル(20mg/kg)を1日目に静脈内投与し、化合物13(30mg/kg)又は化合物22(60mg/kg)を2日目及び3日目に1日2回経口投与した。群分け後11日目の平均RTV値と平均BWC値を表22及び表23に示した。
オーロラCキナーゼ活性に対する本発明化合物のインビトロでの阻害活性を測定した。具体的には、Off-chip Mobility Shift Assay法を用い、以下の手順で反応を行った。
反応用緩衝液(20mM HEPES,0,01% Triton X-100,2mM DTT,pH7.5)に本発明化合物、ATP(終濃度は25μM)、基質(Kemptide,終濃度1000nM)、マグネシウム(終濃度5mM)および精製ヒトオーロラCキナーゼを加え混合後、室温にて1時間反応させた。精製ヒトオーロラCキナーゼは、全長オーロラCキナーゼのN末端側にGSTタンパク質を融合し、バキュロウイルスにて発現させた。GST-オーロラC融合タンパク質は、グルタチオンセファロースクロマトグラフューにより精製した。反応後、反応停止液(QuickScout Screening Assist MSA;カルナバイオサイエンス株式会社)を加え、反応液中の基質ペプチドとリン酸化ペプチドをLabChip3000システム(カルナバイオサイエンス株式会社)にて分離、定量した。オーロラCキナーゼ活性に対する本発明化合物のインビトロでの阻害活性測定法は、上記試験例1-2)に示すオーロラA阻害活性の測定方法に準じて行い、リン酸化反応を50%抑制することのできる化合物濃度をIC50値(nM)と定義し、上記試験例1-2)で得られたオーロラA阻害活性と比較した。
結果、本発明化合物のオーロラC阻害活性は、オーロラA阻害活性に比して、80~100倍程度弱く、本発明化合物のオーロラAに対する有意な選択的阻害活性が示唆された。
ヒト由来胃がん細胞株OCUM-2M細胞およびヒト由来子宮癌細胞株HeLa細胞を、10%ウシ胎児血清(FBS)を含むダルベッコ変法イーグル培地(DMEM)中で、80%を超えない細胞密度で日常的に継代した。細胞増殖抑制活性の試験を開始するため、各細胞を上記培地中に懸濁し、96ウェル平底プレート(底面が透明な黒色プレート)の各ウェルに1ウェルあたりの細胞数が2,500または3,000個となるように播種した後、5%炭酸ガス含有の培養器中37℃で1日間培養した。翌日、微小管作動薬(ドセタキセル、カバジタキセルおよびエポチロンB)の段階希釈液をDMSOで作製(各薬剤の試験濃度は、いずれも0.03nMから1000nMの範囲で10用量を設定)し、培地で希釈をした後、DMSOの最終濃度が0.1%となるように細胞の培養プレートの各ウェルに添加した。また微小管作動薬と本発明化合物との併用効果を検証するため、上記化合物を終濃度300nM(DMSOの最終濃度は0.1%)になるようにDMSOにて希釈し、これを細胞の培養プレートの各ウェルに加えた。比較対照群として、微小管作動薬単独および本化合物単独のウェルを別途準備し、5%炭酸ガス含有の培養器中37℃で72時間培養した。細胞数の計測は、CellTiter-Glo Luminescent Cell Viability Assayキット(プロメガ社製)を用いて、プロメガ社の推奨するプロトコールに基づき実施した。キット含有の試薬を各プレートに添加し撹拌後10分間室温で静置した。反応終了後、マイクロプレートリーダーを用いて、発光シグナルを測定した。
以下の式より細胞増殖率を算出し、増殖を50%阻害する被検化合物の濃度(IC50(μM))を求めた。
細胞増殖率(%)= T/C × 100
T:被検化合物を添加したウェルの発光シグナル
C:被検化合物を添加しなかったウェルの発光シグナル
さらに、微小管作動薬単独時のIC50値(IC50_微小管作動薬)および微小管作動薬と本発明化合物を併用した際の微小管作動薬のIC50値(IC50_併用)を求めた。後者のIC50値(IC50値_併用)は、本発明化合物単独時の細胞増殖率を100%とした場合の併用群の細胞増殖阻害率(換算値)より算出した。本発明化合物添加による微小管作動薬の効果増強の程度は、以下の式より算出した値の大小により判断をした。
(併用増強効果)=(IC50値_併用)/(IC50値_微小管作動薬)
上記の値が1を上回るほど、強い増強効果があると判断し、逆に1あるいは1を下回った場合は、併用による効果が乏しいと判断した。
結果、ドセタキセル、カバジタキセルおよびエポチロンBといった微小管作動薬に本発明化合物を添加することにより上記式にて2を上回る値を示し、これら微小管作動薬の細胞増殖抑制効果を増強することが判明した。
Claims (24)
- 一般式(I)
R2は、ハロゲン原子又はC1-C6アルコキシ基を示し;
R3は、置換基としてハロゲン原子、C1-C6アルキル基、C1-C6アルコキシ基及びトリフルオロメチル基から選ばれる基を同一又は異なって1~3個有してもよいフェニル基を示し;
R4は、水素原子又はC1-C6アルキル基を示し;
R5及びR6は、同一又は異なって、水素原子、C1-C6アルキル基又はC3-C6シクロアルキル基を示すか、R5及びR6は、結合する窒素原子と一緒になって3~6員の含窒素飽和ヘテロ環基を形成してもよい。)で表されるピペリジン化合物又はその塩。 - 一般式(I)中、R1が、カルボキシル基、-C(=O)NR5R6(ここで、R5及びR6は、同一又は異なって、水素原子、C1-C6アルキル基又はC3-C6シクロアルキル基を示すか、R5及びR6が結合する窒素原子と一緒になってアゼチジニル基、ピロリジニル基又はイソキサゾリジニル基を形成してもよい)、又は置換基として、C1-C6アルキル基若しくはトリフルオロメチル基を有していてもよいオキサジアゾリル基である請求項1記載の化合物又はその塩。
- 一般式(I)中、R1がカルボキシル基、-C(=O)NR5R6(ここで、R5及びR6は、同一又は異なって、水素原子、メチル基、シクロプロピル基若しくはシクロブチル基であるか、R5及びR6が結合する窒素原子と一緒になってアゼチジニル基、ピロリジニル基若しくはイソキサゾリジニル基を示す)、又は置換基としてメチル基若しくはトリフルオロメチル基を有してもよいオキサジアゾリル基である請求項1又は2記載の化合物又はその塩。
- 一般式(I)中、R2がフッ素原子、塩素原子又はC1-C4アルコキシ基である請求項1~3のいずれか記載の化合物又はその塩。
- 一般式(I)中、R2がフッ素原子、塩素原子又はメトキシ基である請求項1~4のいずれか記載の化合物又はその塩。
- 一般式(I)中、R3が置換基としてハロゲン原子、C1-C4アルキル基、C1-C4アルコキシ基及びトリフルオロメチル基から選ばれる基を同一又は異なって1~2個有してもよいフェニル基である請求項1~5のいずれか記載の化合物又はその塩。
- 一般式(I)中、R3が置換基としてフッ素原子、塩素原子、メチル基、メトキシ基及びトリフルオロメチル基から選ばれる基を同一又は異なって1~2個有してもよいフェニル基である請求項1~6のいずれか記載の化合物又はその塩。
- 一般式(I)中、R4が水素原子又はC1-C4アルキル基である請求項1~7のいずれか記載の化合物又はその塩。
- 一般式(I)中、R1が、カルボキシル基、-C(=O)NR5R6(ここで、R5及びR6は、同一又は異なって、水素原子、C1-C4アルキル基又はC3-C6シクロアルキル基を示すか、R5及びR6が結合する窒素原子と一緒になってアゼチジニル基、ピロリジニル基又はイソキサゾリジニル基を形成してもよい)、又は置換基として、C1-C4アルキル基若しくはトリフルオロメチル基を有していてもよいオキサジアゾリル基であり;R2がフッ素原子、塩素原子又はC1-C4アルコキシ基であり;R3が置換基としてハロゲン原子、C1-C4アルキル基、C1-C4アルコキシ基及びトリフルオロメチル基から選ばれる基を同一又は異なって1~2個有してもよいフェニル基であり;R4が水素原子又はC1-C4アルキル基である請求項1記載の化合物又はその塩。
- 一般式(I)中、R1がカルボキシル基、-C(=O)NR5R6(ここで、R5及びR6は、同一又は異なって、水素原子、メチル基、シクロプロピル基又はシクロブチル基であるか、R5及びR6が結合する窒素原子と一緒になってアゼチジニル基、ピロリジニル基又はイソキサゾリジニル基を示す)、又は置換基としてメチル基又はトリフルオロメチル基を有してもよいオキサジアゾリル基であり;R2がフッ素原子、塩素原子又はメトキシ基であり;R3が置換基としてフッ素原子、塩素原子、メチル基、メトキシ基及びトリフルオロメチル基から選ばれる基を同一又は異なって1~2個有してもよいフェニル基であり;R4が水素原子又はメチル基である請求項9記載の化合物又はその塩。
- 一般式(I)中、R1がカルボキシル基、-C(=O)NR5R6(ここで、R5及びR6は、同一又は異なって、水素原子又はメチル基であるか、R5及びR6が結合する窒素原子と一緒になってイソキサゾリジニル基を示す)、又は置換基としてメチル基を有してもよい1,2,4-オキサジアゾリル基又は1,3,4-オキサジアゾリル基であり;R2がフッ素原子、塩素原子又はメトキシ基であり;R3が置換基としてフッ素原子、塩素原子、メチル基、メトキシ基及びトリフルオロメチル基から選ばれる基を同一又は異なって1~2個有するフェニル基であり;R4が水素原子又はメチル基である請求項10記載の化合物又はその塩。
- 一般式(I)中、R1がカルボキシル基又は置換基としてメチル基を有してもよい1,2,4-オキサジアゾリル基であり;R2がフッ素原子であり;R3が置換基としてフッ素原子及び塩素原子から選ばれる基を同一又は異なって1~2個有するフェニル基であり;R4がメチル基である請求項11記載の化合物又はその塩。
- 化合物が、以下の化合物群から選択されるものである請求項1~8のいずれか1項記載の化合物又はその塩。
1-(2,3-ジクロロベンゾイル)-4-((5-フルオロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)ピペリジン-4-カルボン酸;
1-(2-フルオロ-3-トリフルオロメチルベンゾイル)-4-((5-フルオロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)ピペリジン-4-カルボン酸;
1-(3-クロロ-2-フルオロベンゾイル)-4-((5-フルオロ-6-(1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)ピペリジン-4-カルボン酸;
1-(3-クロロ-2-フルオロベンゾイル)-4-((5-メトキシ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)ピペリジン-4-カルボン酸;
1-(3-クロロ-2-フルオロベンゾイル)-4-((5-クロロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)ピペリジン-4-カルボン酸;
1-(3-クロロ-2-フルオロベンゾイル)-4-((5-フルオロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)ピペリジン-4-カルボン酸;
1-(3-クロロ-2-フルオロベンゾイル)-4-((5-フルオロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)-N-メチルピペリジン-4-カルボキシアミド;
1-(3-クロロ-2-フルオロベンゾイル)-4-((5-フルオロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)-N,N-ジメチルピペリジン-4-カルボキシアミド;
アゼチジン-1-イル(1-(3-クロロ-2-フルオロベンゾイル)-4-((5-フルオロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)ピペリジン-4-イル)メタノン;
(1-(3-クロロ-2-フルオロベンゾイル)-4-((5-フルオロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)ピペリジン-4-イル)(イソキサゾリジン-2-イル)メタノン;
(3-クロロ-2-フルオロフェニル)(4-((5-フルオロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)-4-(5-メチル-1,2,4-オキサジアゾール-3-イル)ピペリジン-1-イル)メタノン;
(2,3-ジクロロフェニル)(4-((5-フルオロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)-4-(5-メチル-1,2,4-オキサジアゾール-3-イル)ピペリジン-1-イル)メタノン;
(3-クロロ-2-フルオロフェニル)(4-((5-フルオロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)-4-(1,2,4-オキサジアゾール-3-イル)ピペリジン-1-イル)メタノン;
(3-クロロ-2-フルオロフェニル)(4-((5-フルオロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)-4-(5-メチル-1,3,4-オキサジアゾール-3-イル)ピペリジン-1-イル)メタノン;
(3-クロロ-2-フルオロフェニル)(4-((5-フルオロ-6-(5-メチル-1H-ピラゾール-3-イルアミノ)ピリジン-2-イル)メチル)-4-(3-メチル-1,2,4-オキサジアゾール-5-イル)ピペリジン-1-イル)メタノン - 請求項1~13のいずれか1項記載の化合物又はその塩を有効成分とするオーロラA選択的阻害剤。
- 請求項1~13のいずれか1項記載の化合物又はその塩と薬学的担体を含有する医薬組成物。
- 請求項1~13のいずれか1項記載の化合物又はその塩を有効成分とする抗腫瘍剤。
- 請求項1~13のいずれか1項記載の化合物又はその塩を有効成分とする微小管作動薬の抗腫瘍効果増強剤。
- 請求項1~13のいずれか1項記載の化合物又はその塩の、抗腫瘍剤製造のための使用。
- 請求項1~13のいずれか1項記載の化合物又はその塩の、微小管作動薬の抗腫瘍効果増強剤製造のための使用。
- 癌治療のための、請求項1~13のいずれか1項記載の化合物又はその塩。
- 微小管作動薬の抗腫瘍効果増強のための、請求項1~13のいずれか1項記載の化合物又はその塩。
- 請求項1~13のいずれか1項記載の化合物又はその塩の有効量を投与することを特徴とする癌の治療方法。
- 請求項1~13のいずれか1項記載の化合物又はその塩の有効量を投与することを特徴とする微小管作動薬の抗腫瘍効果増強方法。
- 請求項1~13のいずれか1項記載の化合物又はその塩の有効量、及び微小管作動薬の有効量を併用投与することを特徴とする癌治療方法。
Priority Applications (17)
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JP2013523421A JP5323289B1 (ja) | 2012-02-29 | 2013-02-27 | 新規ピペリジン化合物又はその塩 |
RU2014138987/04A RU2581834C1 (ru) | 2012-02-29 | 2013-02-27 | Новое пиперидиновое соединение или его соль |
US14/381,814 US9346787B2 (en) | 2012-02-29 | 2013-02-27 | Piperidine compound or salt thereof |
DK13755229.5T DK2821406T3 (en) | 2012-02-29 | 2013-02-27 | Hitherto unknown piperidine compound or salt thereof |
CA2865875A CA2865875C (en) | 2012-02-29 | 2013-02-27 | Piperidine compound or salt thereof |
ES13755229.5T ES2576497T3 (es) | 2012-02-29 | 2013-02-27 | Compuesto de piperidina novedoso o sal del mismo |
BR112014021519-7A BR112014021519B1 (pt) | 2012-02-29 | 2013-02-27 | Compostos de piperidina ou sais dos mesmos e inibidor seletivo de aurora a, composição farmacêutica, agente antitumoral e agente de potencialização de efeito antitumoral de um agonista de microtúbulos compreendendo os ditos compostos, bem como usos terapêuticos dos ditos composto |
SG11201405318PA SG11201405318PA (en) | 2012-02-29 | 2013-02-27 | Novel piperidine compound or salt thereof |
EP13755229.5A EP2821406B1 (en) | 2012-02-29 | 2013-02-27 | Novel piperidine compound or salt thereof |
KR1020147023717A KR101677823B1 (ko) | 2012-02-29 | 2013-02-27 | 신규 피페리딘 화합물 또는 그 염 |
IN7283DEN2014 IN2014DN07283A (ja) | 2012-02-29 | 2013-02-27 | |
MX2014010395A MX344276B (es) | 2012-02-29 | 2013-02-27 | Compuesto de piperidina novedoso o sal del mismo. |
CN201380011842.0A CN104159893B (zh) | 2012-02-29 | 2013-02-27 | 哌啶化合物或其盐 |
AU2013227024A AU2013227024B2 (en) | 2012-02-29 | 2013-02-27 | Novel piperidine compound or salt thereof |
HK15100157.2A HK1199730A1 (zh) | 2012-02-29 | 2015-01-07 | 哌啶化合物或其鹽 |
US15/131,372 US10092556B2 (en) | 2012-02-29 | 2016-04-18 | Piperidine compound or salt thereof |
US16/118,912 US20180369224A1 (en) | 2012-02-29 | 2018-08-31 | Novel piperidine compound or salt thereof |
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JP2012-043303 | 2012-02-29 | ||
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JP2012186534 | 2012-08-27 |
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US14/381,814 A-371-Of-International US9346787B2 (en) | 2012-02-29 | 2013-02-27 | Piperidine compound or salt thereof |
US15/131,372 Division US10092556B2 (en) | 2012-02-29 | 2016-04-18 | Piperidine compound or salt thereof |
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US (3) | US9346787B2 (ja) |
EP (1) | EP2821406B1 (ja) |
JP (1) | JP5323289B1 (ja) |
KR (1) | KR101677823B1 (ja) |
CN (1) | CN104159893B (ja) |
AU (1) | AU2013227024B2 (ja) |
BR (1) | BR112014021519B1 (ja) |
CA (1) | CA2865875C (ja) |
DK (1) | DK2821406T3 (ja) |
ES (1) | ES2576497T3 (ja) |
HK (1) | HK1199730A1 (ja) |
HU (1) | HUE028495T2 (ja) |
IN (1) | IN2014DN07283A (ja) |
MX (1) | MX344276B (ja) |
MY (1) | MY169179A (ja) |
PL (1) | PL2821406T3 (ja) |
PT (1) | PT2821406T (ja) |
RU (1) | RU2581834C1 (ja) |
SG (1) | SG11201405318PA (ja) |
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