US20100004206A1 - Water-soluble benzoazepine compound and its pharmaceutical composition - Google Patents

Water-soluble benzoazepine compound and its pharmaceutical composition Download PDF

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US20100004206A1
US20100004206A1 US12/159,027 US15902706A US2010004206A1 US 20100004206 A1 US20100004206 A1 US 20100004206A1 US 15902706 A US15902706 A US 15902706A US 2010004206 A1 US2010004206 A1 US 2010004206A1
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Makoto Komatsu
Fumitaka Goto
Yasuhiro Menjo
Keigo Yamada
Takakuni Matsuda
Yusuke Kato
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Otsuka Pharmaceutical Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
    • C07F9/02—Phosphorus compounds
    • C07F9/547—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom
    • C07F9/553—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom having one nitrogen atom as the only ring hetero atom
    • C07F9/5532—Seven-(or more) membered rings
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
    • C07F9/02—Phosphorus compounds
    • C07F9/547—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom
    • C07F9/553—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom having one nitrogen atom as the only ring hetero atom
    • C07F9/5532—Seven-(or more) membered rings
    • C07F9/5535—Seven-(or more) membered rings condensed with carbocyclic rings or ring systems
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
    • C07F9/02—Phosphorus compounds
    • C07F9/547—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom
    • C07F9/553—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom having one nitrogen atom as the only ring hetero atom
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/66—Phosphorus compounds
    • A61K31/675—Phosphorus compounds having nitrogen as a ring hetero atom, e.g. pyridoxal phosphate
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P13/00—Drugs for disorders of the urinary system
    • A61P13/12—Drugs for disorders of the urinary system of the kidneys
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P7/00—Drugs for disorders of the blood or the extracellular fluid
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P7/00—Drugs for disorders of the blood or the extracellular fluid
    • A61P7/02—Antithrombotic agents; Anticoagulants; Platelet aggregation inhibitors
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P7/00—Drugs for disorders of the blood or the extracellular fluid
    • A61P7/10—Antioedematous agents; Diuretics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P9/00—Drugs for disorders of the cardiovascular system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P9/00—Drugs for disorders of the cardiovascular system
    • A61P9/02—Non-specific cardiovascular stimulants, e.g. drugs for syncope, antihypotensives
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P9/00—Drugs for disorders of the cardiovascular system
    • A61P9/08—Vasodilators for multiple indications
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P9/00—Drugs for disorders of the cardiovascular system
    • A61P9/12—Antihypertensives
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/55—Design of synthesis routes, e.g. reducing the use of auxiliary or protecting groups

Definitions

  • the present invention relates to a novel benzoazepine compound and its pharmaceutical composition.
  • Tolvaptan represented by the following formula (2) is a known compound, and has been disclosed in, for example, U.S. Pat. No. 5,258,510 specification (Example 1199).
  • tolvaptan is useful as a vasopressin antagonist having aquaretic activity (Circulation, 107, pp. 2690-2696 (2003)).
  • tolvaptan because of its low water solubility, tolvaptan has problems in that it is poorly absorbed by the intestinal canal, its dosage form and administration route are limited, etc.
  • attempts have been made to solve these problems so that, for example, tolvaptan can be administered in the form of an amorphous solid preparation composition (Japanese Unexamined Patent Publication No. 1999-21241), in the application of tolvaptan, its dosage form and administration route still remain limited.
  • the present invention aims to provide a novel benzoazepine compound for improving the solubility of tolvaptan in water.
  • the present inventors conducted extensive research to solve the above problem, and as a result found that when tolvaptan is in the form of a phosphate ester compound, the water solubility thereof can be remarkably improved.
  • the present invention has been accomplished based on this finding.
  • the present invention provides the following benzoazepine compounds, and compositions comprising the same, as described in Item 1 to 13 below.
  • R represents a hydrogen atom, a hydroxy group optionally protected with a protecting group, a mercapto group optionally protected with a protecting group, or an amino group optionally protected with one or two protecting groups
  • R 1 represents a hydrogen atom or a hydroxy-protecting group
  • X represents an oxygen atom or a sulfur atom.
  • Item 2 A benzoazepine compound according to item 1 or a salt thereof, wherein X is an oxygen atom.
  • Item 4 A benzoazepine compound according to item 1 or 2, or a salt thereof, wherein R is a hydrogen atom, a mercapto group optionally protected with a protecting group, or an amino group optionally protected with one or two protecting groups.
  • Item 5 A benzoazepine compound according to any one of items 1, 2, 3 and 4, or a salt thereof, wherein R 1 is a hydroxy-protecting group.
  • Item 6 A benzoazepine compound according to any one of items 1, 2, 3 and 4, or a salt thereof, wherein R 1 is a hydrogen atom.
  • Item 7 A benzoazepine compound according to item 1 or a salt thereof, wherein X is a sulfur atom.
  • Item 8 A benzoazepine compound according to item 1 or a salt thereof, wherein X is an oxygen atom, R is a hydroxy group, and R 1 is a hydrogen atom.
  • Item 9 A pharmaceutical composition comprising a benzoazepine compound of item 1 or a pharmaceutically acceptable salt thereof, together with a pharmaceutically acceptable diluent and/or carrier.
  • Item 10 A pharmaceutical composition according to item 9, for use as a vasodilator, hypotensor, aquaretic agent, PKD, or platelet aggregation inhibitor.
  • Item 11 An aqueous solution composition comprising a benzoazepine compound of item 1 or a pharmaceutically acceptable salt thereof.
  • Item 12 An aqueous solution composition according to item 11, comprising a benzoazepine compound of item 1 or a pharmaceutically acceptable salt thereof, together with a buffer, isotonizing agent and injection solvent, and which is in the form of an injection.
  • Item 13 An aqueous solution composition according to item 12, further comprising a pH adjuster.
  • “Lower” as used herein indicates C 1-6 unless otherwise noted.
  • protecting groups for a “hydroxy group optionally protected with a protecting group”, “mercapto group optionally protected with a protecting group” and “hydroxy-protecting group” include lower alkyl groups, phenyl(lower)alkyl groups, cyano lower alkyl groups, and lower alkyloxycarbonyl lower alkyl groups.
  • protecting groups for an “amino group optionally protected with one or two protecting groups” include lower alkyl groups optionally bearing hydroxy group(s).
  • lower alkyl groups and lower alkyl groups in phenyl(lower)alkyl groups, cyano lower alkyl groups, lower alkyloxycarbonyl lower alkyl groups, and lower alkyl groups optionally bearing hydroxy group(s) include C 1-6 straight or branched alkyl groups, for example, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, sec-butyl, n-pentyl, isopentyl, neopentyl, n-hexyl, isohexyl, 3-methylpentyl, and the like.
  • phenyl(lower)alkyl groups are, for example, benzyl, phenethyl, 3-phenylpropyl, trityl, etc.
  • cyano lower alkyl groups are C 1-6 straight or branched alkyl groups substituted with one to three cyano groups, for example, cyanomethyl, 2-cyanoethyl, 1-, 2-, or 3-cyano-n-propyl, 1-, 2-, or 3-cyano-isopropyl, 1-, 2-, 3-, or 4-cyano-n-butyl, 1-, 2-, 3-, or 4-cyano-isobutyl, 1-, 2-, 3-, or 4-cyano-tert-butyl, 1-, 2-, 3-, or 4-cyano-sec-butyl, 1-, 2-, 3-, 4-, or 5-cyano-n-pentyl, 1-, 2-, 3-, 4-, or 5-cyano-isopentyl, 1-, 2-, 3-, 4-, or 5-cyano-neopentyl, 1-, 2-, 3-, 4-, or 5-cyano-neopentyl, 1-, 2-, 3-, 4-, 5-cyano-neopentyl, 1-, 2-, 3-, 4-, 5-
  • Preferable lower alkyloxycarbonyl lower alkyl groups are alkyloxycarbonylalkyl groups wherein the alkyloxy moiety is a C 1-6 straight or branched alkyloxy group and the alkyl moiety is a C 1-6 straight or branched alkyl group, for example, methoxycarbonylmethyl, ethoxycarbonylmethyl, n-propoxycarbonylmethyl, isopropoxycarbonylmethyl, n-butoxycarbonylmethyl, isobutoxycarbonylmethyl, n-pentoxycarbonylmethyl, n-hexyloxycarbonylmethyl, 2-methoxycarbonylethyl, 3-methoxycarbonylpropyl, 4-methoxycarbonylbutyl, 5-methoxycarbonylpentyl, 6-methoxycarbonylhexyl, and the like.
  • Preferable lower alkyl groups optionally bearing hydroxy group(s) are C 1-6 straight or branched alkyl groups optionally substituted with one to three hydroxy groups, for example, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, sec-butyl, n-pentyl, isopentyl, neopentyl, n-hexyl, isohexyl, 3-methylpentyl, hydroxymethyl, 2-hydroxyethyl, 1-, 2-, or 3-hydroxy-n-propyl, 1-, 2-, or 3-hydroxy-isopropyl, 1-, 2-, 3-, or 4-hydroxy-n-butyl, 1-, 2-, 3-, or 4-hydroxy-isobutyl, 1-, 2-, 3-, or 4-hydroxy-tert-butyl, 1-, 2-, 3-, or 4-hydroxy-sec-butyl, 1-, 2-, 3-, 4-, or 5-hydroxy-
  • amino groups optionally substituted with one or two protecting group(s) are amino groups optionally bearing one or two C 1-6 straight or branched alkyl groups optionally bearing one to three hydroxy groups, for example, amino, methylamino, dimethylamino, ethylamino, diethylamino, n-propylamino, di-n-propylamino, iso-propylamino, di-iso-propylamino, n-butyl amino, di-n-butylamino, iso-butyl amino, di-iso-butylamino, tert-butyl amino, di-tert-butylamino, n-pentyl amino, di-n-pentylamino, n-hexyl amino, di-n-hexylamino, hydroxymethylamino, 2-hydroxyethylamino, diethylamino, di-(2-hydroxyethyl)amino, 3-
  • benzoazepine compounds represented by the above general formula (1) the following compounds and salts thereof are preferable:
  • R is an hydroxy group and R 1 is a hydrogen atom or hydroxy-protecting group.
  • Benzoazepine compounds represented by the above general formula (1) can be produced by various methods, and an example thereof is a method as shown by the following reaction schemes 1 to 7:
  • R 3 and R 4 are independently a lower alkyl group or optionally-substituted phenyl group, or R 3 and R 4 may instead be linked together through or without one or more additional heteroatoms to form, together with the nitrogen atom to which they are bound, a 5- to 8-membered saturated or unsaturated ring; and R 1a and R 2a may be the same or different, and each represents a hydroxy-protecting group.
  • lower alkyl groups are as mentioned above, including C 1-6 straight or branched alkyl groups, for example, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, sec-butyl, n-pentyl, isopentyl, neopentyl, n-hexyl, isohexyl, 3-methylpentyl, and the like.
  • substituents for optionally-substituted phenyl groups include lower alkyl groups as above; C 1-6 straight or branched alkoxy groups, for example, methoxy, ethoxy, propoxy, isopropoxy, butoxy, tert-butoxy, pentyloxy, hexyloxy, and the like; and halogen atoms, for example, fluorine, chlorine, bromine, iodine, and the like.
  • optionally-substituted phenyl groups include phenyl; 2-, 3- or 4-methylphenyl; 2-, 3- or 4-chlorophenyl; 2-, 3-, or 4-methoxyphenyl; etc.
  • Examples of 5- to 8-membered saturated or unsaturated rings formed by R 3 and R 4 being linked together include morpholine ring, etc.
  • Compound (4) can be produced by reacting compound (2) with compound (3) in a suitable solvent in the presence of acid.
  • solvents include halogenated hydrocarbon solvents, for example, methylene chloride, chloroform, 1,2-dichloroethane, carbon tetrachloride, and the like; esters, for example, ethyl acetate and the like; aromatic hydrocarbons, for example, benzene, toluene, xylene, and the like; acetonitrile; etc.
  • halogenated hydrocarbon solvents for example, methylene chloride, chloroform, 1,2-dichloroethane, carbon tetrachloride, and the like
  • esters for example, ethyl acetate and the like
  • aromatic hydrocarbons for example, benzene, toluene, xylene, and the like
  • acetonitrile etc.
  • acids include mild acids, for example, 1H-tetrazole, 5-methyltetrazole, pyridinium hydrobromide, and the like.
  • the amount of acid is usually at least about 1 mole, and preferably about 1 to about 10 moles, per mol of compound (2).
  • the amount of compound (3) is usually 0.5 to 2 moles, and preferably 0.7 to 1.5 moles, per mol of compound (2).
  • the reaction temperature is usually ⁇ 20 to 50° C., preferably 0 to 50° C., and more preferably 0° C. to room temperature.
  • the reaction time is usually 15 minutes to 24 hours, preferably 30 minutes to 6 hours, and more preferably 1 to 3 hours.
  • Compound (1a) can be produced by reacting compound (4) with an oxidizing agent in a suitable solvent.
  • solvents include halogenated hydrocarbon solvents, for example, methylene chloride, chloroform, 1,2-dichloroethane, carbon tetrachloride, and the like; esters, for example, ethyl acetate and the like; aromatic hydrocarbons, for example, benzene, toluene, xylene, and the like; acetonitrile; etc.
  • halogenated hydrocarbon solvents for example, methylene chloride, chloroform, 1,2-dichloroethane, carbon tetrachloride, and the like
  • esters for example, ethyl acetate and the like
  • aromatic hydrocarbons for example, benzene, toluene, xylene, and the like
  • acetonitrile etc.
  • oxidizing agents include peracids, for example, hydrogen peroxide, and metachloroperbenzoic acid, peracetic acid, permaleic acid, and the like.
  • the amount of oxidizing agent is usually at least about 1 mole, and preferably about 1 to about 3 moles, per mol of compound (4).
  • the reaction temperature is usually ⁇ 100 to 50° C., preferably ⁇ 40° C. to room temperature, and more preferably ⁇ 40 to 0° C.
  • the reaction time is usually 15 minutes to 24 hours, preferably 30 minutes to 6 hours, and more preferably 30 minutes to 2 hours.
  • Compound (1b) can be obtained by deprotecting the protected hydroxy groups of compound (1a) by routine methods.
  • the hydroxy-protecting groups are lower alkyl groups
  • deprotection can be performed under routine hydrolysis conditions.
  • Such hydrolysis is preferably performed in the presence of base or acid (including Lewis acid).
  • inorganic and organic bases can be used as such a base.
  • Preferable inorganic bases are, for example, alkali metals (e.g., sodium, potassium, etc.); alkaline earth metals (e.g., magnesium, calcium, etc.); and their hydroxides, carbonates and hydrogencarbonates.
  • Preferable organic bases are, for example, trialkylamines (e.g., trimethylamine, triethylamine, etc.), picoline, and 1,5-diazabicyclo[4,3,0]non-5-ene.
  • organic and inorganic acids can be used as such an acid.
  • Preferable organic acids are fatty acids, for example, formic acid, acetic acid, propionic acid, and the like; and trihaloacetic acids, for example, trichloroacetic acid, trifluoroacetic acid, and the like.
  • Preferable inorganic acids are, for example, hydrochloric acid, hydrobromic acid, sulfuric acid, hydrogen chloride, hydrogen bromide, etc.
  • Lewis acids include boron trifluoride ether complex, boron tribromide, aluminium chloride, ferric chloride, etc.
  • the hydrolysis is preferably performed in the presence of cation scavenger (e.g., anisole, phenol, etc).
  • cation scavenger e.g., anisole, phenol, etc.
  • the amount of base or acid is not limited so long as it satisfies hydrolysis requirements.
  • the reaction temperature is usually ⁇ 20 to 100° C., preferably 0 to 50° C., and more preferably 0° C. to room temperature.
  • the reaction time is usually 5 minutes to 24 hours, preferably 15 minutes to 6 hours, and more preferably 15 minutes to 3 hours.
  • the hydroxy-protecting groups are phenyl(lower)alkyl groups
  • deprotection can be preformed by a routine catalytic reduction.
  • Catalysts suitable for such catalytic reduction are platinum catalysts (e.g., platinum plate, spongy platinum, platinum black, colloidal platinum, platinum oxide, platinum wire, etc.), palladium catalysts (e.g., spongy palladium, palladium black, palladium oxide, palladium carbon, palladium/barium sulfate, palladium/barium carbonate, etc.), nickel catalysts (e.g., reduced nickel, nickel oxide, Raney nickel, etc.), cobalt catalysts (e.g., reduced cobalt, Raney cobalt, etc.), iron catalysts (e.g., reduced iron, etc.), and the like.
  • platinum catalysts e.g., platinum plate, spongy platinum, platinum black, colloidal platinum, platinum oxide, platinum wire, etc.
  • palladium catalysts e.g., spongy palladium, palladium black, palladium oxide, palladium carbon, palladium/barium sulfate
  • the amount of catalyst used for the catalytic reduction is not limited, and may be a routine amount.
  • the reaction temperature is usually 0 to 100° C., preferably 0 to 50° C., and more preferably room temperature to 50° C.
  • the reaction time is usually 5 minutes to 24 hours, preferably 5 minutes to 3 hours, and more preferably 5 minutes to 1 hour.
  • the amount of phosphorus oxychloride is usually 1 mole to large excess, and preferably 1 to 5 moles, per mol of compound (2).
  • solvents for the reaction with phosphorus oxychloride include ethers, for example, diethyl ether, dioxane, tetrahydrofuran, monoglyme, diglyme, and the like; halogenated hydrocarbon solvents, for example, methylene chloride, chloroform, 1,2-dichloroethane, carbon tetrachloride, and the like; esters, for example, ethyl acetate and the like; aromatic hydrocarbons, for example, benzene, toluene, xylene, and the like; acetonitrile; etc.
  • ethers for example, diethyl ether, dioxane, tetrahydrofuran, monoglyme, diglyme, and the like
  • halogenated hydrocarbon solvents for example, methylene chloride, chloroform, 1,2-dichloroethane, carbon tetrachloride, and the like
  • esters for example, eth
  • Examples of basic compounds include carbonates, for example, sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, cesium carbonate, and the like; alkali metal hydroxides, for example, sodium hydroxide, potassium hydroxide, and the like; alkali earth metal hydroxides, for example, calcium hydroxide and the like; phosphates, for example, potassium phosphate, sodium phosphate, and the like; organic bases, for example, pyridine, imidazole, N-ethyldiisopropylamine, dimethylaminopyridine, triethylamine, trimethylamine, dimethylaniline, N-methylmorpholine, 1,5-diazabicyclo[4.3.0]non-5-ene (DBN), 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU), 1,4-diazabicyclo[2.2.2]octane (DABCO), and the like; and mixtures thereof.
  • alkali metal hydroxides
  • the amount of basic compound is usually at least about 3 moles, and preferably about 3 to about 10 moles, per mol of compound (2).
  • the reaction temperature is usually ⁇ 100 to 50° C., preferably ⁇ 50° C. to room temperature, and more preferably ⁇ 30° C. to room temperature.
  • the reaction time is usually 15 minutes to 24 hours, preferably 30 minutes to 6 hours, and more preferably 1 to 3 hours.
  • Hydrolysis can be achieved by adding water to the above reaction mixture or adding the reaction mixture to water.
  • hydrolysis is preferably carried out with cooling.
  • heating is preferably carried out after the initial reaction has subsided.
  • the reaction time is usually 15 minutes to 24 hours, preferably 30 minutes to 6 hours, and more preferably 1 to 3 hours.
  • R 1 is the same as above.
  • the amount of diphenyl phosphite is usually 1 mole to large excess, and preferably 1 to 5 moles, per mol of compound (2).
  • the amount of alcohol (R 1 OH) is usually 1 mole to large excess, and preferably 1 to 10 moles, per mol of compound (2).
  • solvents examples include ethers, for example, diethyl ether, dioxane, tetrahydrofuran, monoglyme, diglyme, and the like; halogenated hydrocarbon solvents, for example, methylene chloride, chloroform, 1,2-dichloroethane, carbon tetrachloride, and the like; esters, for example, ethyl acetate and the like; aromatic hydrocarbons, for example, benzene, toluene, xylene, and the like; and acetonitrile.
  • ethers for example, diethyl ether, dioxane, tetrahydrofuran, monoglyme, diglyme, and the like
  • halogenated hydrocarbon solvents for example, methylene chloride, chloroform, 1,2-dichloroethane, carbon tetrachloride, and the like
  • esters for example, ethyl acetate and the like
  • Examples of basic compounds include carbonates, for example, sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, caesium carbonate, and the like; alkali metal hydroxides, for example, sodium hydroxide, potassium hydroxide, and the like; alkali earth metal hydroxides, for example, calcium hydroxide and the like; phosphates, for example, potassium phosphate, sodium phosphate, and the like; organic bases, for example, pyridine, imidazole, N-ethyldiisopropylamine, dimethylaminopyridine, triethylamine, trimethylamine, dimethylaniline, N-methylmorpholine, 1,5-diazabicyclo[4.3.0]non-5-ene (DBN), 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU), 1,4-diazabicyclo[2.2.2]octane (DABCO), and the like; and mixtures thereof.
  • the amount of basic compound is usually at least about 1 mole, and preferably about 1 to about 10 moles, per mol of compound (2).
  • Organic solvents may also be used as solvent.
  • the reaction temperature is usually ⁇ 100 to 50° C., preferably ⁇ 50° C. to room temperature, and more preferably ⁇ 30° C. to room temperature.
  • the reaction time is usually 15 minutes to 24 hours, preferably 30 minutes to 6 hours, and more preferably 1 to 3 hours.
  • R 1 is the same as above.
  • Oxidization of phosphite can be carried out using about 1 to about 3 equivalents of phosphorous acid-oxidizing agent, at a temperature in the range of about 0° C. to about 50° C.
  • the reaction is carried out using about 5 to about 15% excess phosphorous acid-oxidizing agent at 0° C. to room temperature.
  • a phosphorous acid-oxidizing agent is a reagent that oxidizes a phosphite to a phosphate.
  • examples thereof include peroxides, for example, hydrogen peroxide; metachloroperbenzoic acid and the like; iodine in water; bromine; nitrogen tetroxide; etc. Iodine in water is preferable.
  • solvents examples include ethers, for example, diethyl ether, dioxane, tetrahydrofuran, monoglyme, diglyme, and the like; halogenated hydrocarbon solvents, for example, methylene chloride, chloroform, 1,2-dichloroethane, and the like; esters, for example, ethyl acetate and the like; aromatic hydrocarbons, for example, benzene, toluene, xylene, and the like; acetonitrile; and pyridine.
  • ethers for example, diethyl ether, dioxane, tetrahydrofuran, monoglyme, diglyme, and the like
  • halogenated hydrocarbon solvents for example, methylene chloride, chloroform, 1,2-dichloroethane, and the like
  • esters for example, ethyl acetate and the like
  • aromatic hydrocarbons for example, benzene, toluen
  • the reaction temperature is usually ⁇ 100 to 50° C., preferably ⁇ 50° C. to room temperature, and more preferably ⁇ 30° C. to room temperature.
  • the reaction time is usually 15 minutes to 24 hours, preferably 15 minutes to 6 hours, and more preferably 15 minutes to 3 hours.
  • R 1 is the same as above; and R 11 and R 12 may the same or different, and each represents a hydrogen atom or a lower alkyl group optionally bearing hydroxy group(s).
  • Sodium hypochlorite may also be used in place of carbon tetrachloride.
  • the amount of carbon tetrachloride is usually 1 mole to large excess, and preferably 1 to 5 moles, per mol of compound (1c).
  • the amount of amine (R 11 R 12 NH) is usually 1 mole to large excess, and preferably 1 to 10 moles, per mol of compound (1c).
  • solvents examples include ethers, for example, diethyl ether, dioxane, tetrahydrofuran, monoglyme, diglyme, and the like; halogenated hydrocarbon solvents, for example, methylene chloride, chloroform, 1,2-dichloroethane, carbon tetrachloride, and the like; esters, for example, ethyl acetate and the like; aromatic hydrocarbons, for example, benzene, toluene, xylene, and the like; acetonitrile; etc.
  • ethers for example, diethyl ether, dioxane, tetrahydrofuran, monoglyme, diglyme, and the like
  • halogenated hydrocarbon solvents for example, methylene chloride, chloroform, 1,2-dichloroethane, carbon tetrachloride, and the like
  • esters for example, ethyl acetate and the like
  • Examples of basic compounds include carbonates, for example, sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, caesium carbonate, and the like; alkali metal hydroxides, for example, sodium hydroxide, potassium hydroxide, and the like; alkali earth metal hydroxides, for example, calcium hydroxide and the like; phosphates, for example, potassium phosphate, sodium phosphate, and the like; organic bases, for example, pyridine, imidazole, N-ethyldiisopropylamine, dimethylaminopyridine, triethylamine, trimethylamine, dimethylaniline, N-methylmorpholine, 1,5-diazabicyclo[4.3.0]non-5-ene (DBN), 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU), 1,4-diazabicyclo[2.2.2]octane (DABCO), and the like; and mixtures thereof.
  • the amount of basic compound
  • the reaction temperature is usually ⁇ 100 to 50° C., preferably ⁇ 50° C. to room temperature, and more preferably ⁇ 30° C. to room temperature.
  • the reaction time is usually 1 minute to 24 hours, preferably 1 minute to 6 hours, and more preferably 1 minute to 3 hours.
  • R 1 is the same as above.
  • Phosphorous acid diester (1c) is reacted with sulfur to give phosphorothioic acid diester (1f).
  • the amount of sulfur usually 1 mole to large excess, and preferably 1 to 5 moles, per mol of compound (1c).
  • solvents examples include ethers, for example, diethyl ether, dioxane, tetrahydrofuran, monoglyme, diglyme, and the like; halogenated hydrocarbon solvents, for example, methylene chloride, chloroform, 1,2-dichloroethane, and the like; esters, for example, ethyl acetate and the like; aromatic hydrocarbons, for example, benzene, toluene, xylene, and the like; acetonitrile; and pyridine.
  • ethers for example, diethyl ether, dioxane, tetrahydrofuran, monoglyme, diglyme, and the like
  • halogenated hydrocarbon solvents for example, methylene chloride, chloroform, 1,2-dichloroethane, and the like
  • esters for example, ethyl acetate and the like
  • aromatic hydrocarbons for example, benzene, toluen
  • Examples of basic compounds include carbonates, for example, sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, caesium carbonate, and the like; alkali metal hydroxides, for example, sodium hydroxide, potassium hydroxide, and the like; alkali earth metal hydroxides, for example, calcium hydroxide and the like; phosphates, for example, potassium phosphate, sodium phosphate, and the like; alkali metal hydrides, for example, sodium hydride, potassium hydride, and the like; alkali metals, for example, potassium, sodium, and the like; sodium amide; metal alcoholates, for example, sodium methylate, sodium ethylate, sodium n-butoxide, sodium tert-butoxide, potassium tert-butoxide, and the like; organic bases, for example, pyridine, imidazole, N-ethyldiisopropylamine, dimethylaminopyridine, triethylamine, trimethylamine, dimethylani
  • the reaction temperature is usually ⁇ 100 to 50° C., preferably ⁇ 50° C. to room temperature, and more preferably ⁇ 30° C. to room temperature.
  • the reaction time is usually 15 minutes to 24 hours, preferably 30 minutes to 6 hours, and more preferably 1 to 3 hours.
  • R 1′ is a hydroxy-protecting group.
  • R 1 is a cyanoethyl group
  • the protecting group can be removed by using a basic compound.
  • solvents include water; alcohols, for example, methanol, ethanol, isopropyl alcohol, and the like; ethers, for example, diethyl ether, dioxane, tetrahydrofuran, monoglyme, diglyme, and the like; halogenated hydrocarbon solvents, for example, methylene chloride, chloroform, 1,2-dichloroethane, carbon tetrachloride, and the like; esters, for example, ethyl acetate and the like; aromatic hydrocarbons, for example, benzene, toluene, xylene, and the like; aprotic polar solvents, for example, dimethylformamide (DMF), dimethylsulfoxide (DMSO), and the like; ketones, for example, acetone, methyl ethyl ketone, methyl isobutyl ketone, and the like; acetonitrile; and mixtures thereof.
  • solvents include water; alcohols,
  • Examples of basic compounds include carbonates, for example, sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, caesium carbonate, and the like; alkali metal hydroxides, for example, sodium hydroxide, potassium hydroxide, and the like; alkali earth metal hydroxides, for example, calcium hydroxide and the like; phosphates, for example, potassium phosphate, sodium phosphate, and the like; alkali metal hydrides, for example, sodium hydride, potassium hydride, and the like; alkali metals, for example, potassium, sodium, and the like; sodium amide; metal alcoholates, for example, sodium methylate, sodium ethylate, sodium n-butoxide, sodium tert-butoxide, potassium tert-butoxide, and the like; organic bases, for example, pyridine, imidazole, N-ethyldiisopropylamine, dimethylaminopyridine, triethylamine, trimethylamine, dimethylani
  • the reaction temperature is usually ⁇ 100 to 50° C., preferably ⁇ 50° C. to room temperature, and more preferably ⁇ 30° C. to room temperature.
  • the reaction time is usually 15 minutes to 24 hours, preferably 30 minutes to 6 hours, and more preferably 1 to 3 hours.
  • Compounds (2), (3), (4), (1a), (1b), (1c), (1d), (1e), (1f), (1g) and (1h) in the above reaction schemes may be suitable salts thereof.
  • suitable salts include the same kinds of salts as with compound (1).
  • Compounds represented by general formula (1) of the present invention include stereoisomers, optical isomers, and solvates (hydrates, ethanolates, etc.) thereof.
  • salts of compounds represented by general formula (1) of the present invention include pharmaceutically acceptable salts for example, metal salts, for example, alkali metal salts (e.g., sodium salts, potassium salts, etc.), alkaline earth metal salts (e.g., calcium salts, magnesium salts, etc.) and the like; ammonium salts; organic base salts (e.g., trimethylamine salts, triethylamine salts, pyridine salts, picoline salts, dicyclohexylamine salts, ethylenediamine salts, N,N′-dibenzylethylenediamine salts, tris(hydroxymethyl)aminomethane salts, ethanolamine salts, etc.); etc.
  • alkali metal salts are preferable, and sodium salts are more preferable.
  • Such salts can be easily formed by applying, to the compound of the present invention, the corresponding pharmaceutically acceptable basic compound.
  • applicable basic compounds include sodium hydroxide, potassium hydroxide, calcium hydroxide, sodium carbonate, potassium hydrogencarbonate, etc.
  • the compound of the present invention has, for example, vasopressin antagonism, vasodilating activity, hypotensive activity, activity for inhibiting saccharide release in liver, mesangial cell growth inhibitory activity, aquaretic activity, and platelet aggregation inhibitory activity.
  • the compound is useful as a vasodilator, hypotensor, aquaretic agent and platelet aggregation inhibitor, and is effective in the prevention and treatment of hypertension, edema (e.g., cardiac edema, hepatic edema, renal edema, cerebral edema), abdominal dropsy, heart failure (e.g., severe heart failure), renal dysfunction, syndrome of inappropriate secretion of vasopressin (SIADH), liver cirrhosis, hyponatremia, hypokalemia, diabetes, circulatory insufficiency, polycystic kidney disease (PKD), cerebral infarction, myocardial infarction, and the like.
  • edema e.g., cardiac edema, hepatic edema, renal edema, cerebral edema
  • abdominal dropsy e.g., heart failure (e.g., severe heart failure), renal dysfunction, syndrome of inappropriate secretion of vasopressin (SIADH), liver cir
  • the compound of the present invention When administered to the human body as a medicine, the compound of the present invention may be used simultaneously or separately with other vasopressin antagonists, ACE inhibitors, ⁇ -blocking agents, aquaretic agents, angiotensin II antagonists (ARB), digoxin, and/or like pharmaceutical drugs.
  • vasopressin antagonists ACE inhibitors
  • ⁇ -blocking agents aquaretic agents
  • angiotensin II antagonists (ARB) digoxin, and/or like pharmaceutical drugs.
  • the compound of the present invention is usually used in the form of a general pharmaceutical composition.
  • a pharmaceutical composition can be prepared by a conventional method using diluents and/or excipients which are commonly used, for example, fillers, expanders, binders, moisturizers, disintegrators, surfactants, lubricants, etc.
  • the form of the pharmaceutical composition containing the compound of the present invention can be suitably selected depending on the purpose of the treatment. It may be in the form of, for example, a tablet, pill, powder, solution, suspension, emulsion, capsule, suppository, ointment, or granules.
  • An aqueous solution composition for example, injection, instillation, and the like is particularly preferable.
  • such an injection is preferably formulated into a solution, emulsion, or suspension that has been sterilized and is isotonic with blood.
  • any diluents commonly employed in this field may be used. Examples of such diluents include water, aqueous lactic acid solutions, ethyl alcohol, propylene glycol, ethoxylated isostearyl alcohol, polyoxylated isostearyl alcohol, and polyoxyethylene sorbitan fatty acid esters.
  • sodium chloride, glucose, mannitol, glycerol and the like isotonizing agents in amounts sufficient to prepare an isotonic solution may be mixed in the pharmaceutical composition.
  • Ordinary pH adjusters, solubilizers, buffers, soothing agents and the like may also be added.
  • An injection containing the compound of the present invention can be prepared by a conventional method, using a compound represented by general formula (1) or pharmaceutically acceptable salt thereof, together with a buffer, isotonizing agent, injection solvent, and, if necessary, pH adjuster.
  • buffers include carbonates, borates, phosphates, citrates, tris(hydroxymethyl)aminomethane, malates, and tartrates. It is also possible to singly use an acid or base forming such a buffer.
  • pH adjusters examples include basic compounds, for example, sodium hydroxide and the like; acids, for example, hydrochloric acid and the like.
  • colorants can also be mixed in the pharmaceutical composition, as necessary.
  • the content of the compound represented by general formula (1) of the present invention or a salt thereof in the pharmaceutical composition is not limited, and can be suitably selected from a wide range.
  • the content is usually 0.01 to 70 wt % of the pharmaceutical composition.
  • the method for administering such a pharmaceutical composition is not limited, and it may be administered by a suitable method depending on the form of the pharmaceutical composition; the patient's age, gender, etc.; the degree of the patient's symptoms; and the like.
  • tablets, pills, solutions, suspensions, emulsions, granules and capsules may be orally administered.
  • Injections may be administered by intravenous injection, alone or as a mixture with glucose, amino acid and/or like ordinary replenishers. Injections may also be given alone by intramuscular, intracutaneous, subcutaneous or intraperitoneal administration, as necessary.
  • the dose of the pharmaceutical composition of the present invention can be selected depending on the usage; the patient's age, gender, etc.; the degree of the disease; and the like.
  • the dose is usually such that the compound represented by general formula (1), which is an effective ingredient, is administered in an amount of 0.001 to 100 mg, and preferably 0.001 to 50 mg, per 1 kg of body weight per day in one or more administrations.
  • the dose varies with various conditions. A dose smaller than the above range may be sufficient, while a dose larger than the above range may be necessary.
  • Compound (1) of the present invention or a salt thereof has remarkably excellent water solubility, excellent absorbability, etc.
  • Compound (1b) in particular or a salt thereof has remarkably excellent water solubility, excellent absorbability, etc.
  • compound (1) of the present invention When administered into the human body, compound (1) of the present invention or a salt thereof, compound (1b) or a salt thereof in particular, enables the easy generation of the active ingredient tolvaptan.
  • compound (1) of the present invention or a salt thereof can be easily crystallized and is excellent in operability.
  • compound (1) of the present invention or a salt thereof has excellent chemical stability.
  • Compound (1a) of the present invention can be suitably used as a starting material for producing compound (1b).
  • compositions to be provided in various forms that express drug efficacy equal to tolvaptan, which is an effective drug.
  • FIG. 1 is a graph showing the change in serum concentration of tolvaptan in female rats after rapid tail-vein administration of a solution of compound (1b) at a dose such that 1 mg of tolvaptan is produced per kg of body weight.
  • FIG. 2 is a graph showing the change in serum concentration of tolvaptan in female rats after oral administration of a solution of compound (1b) at a dose such that 1 mg of tolvaptan is produced per kg of body weight.
  • reaction mixture was cooled to ⁇ 40° C., and 6 ml of methylene chloride solution of 920 mg of metachloroperbenzoic acid was added dropwise thereto. The mixture was then stirred at the same temperature for 30 minutes, and at 0° C. for 30 minutes. The reaction mixture was washed with an aqueous sodium thiosulfate solution and saturated aqueous sodium bicarbonate, and then dried over anhydrous sodium sulfate.
  • reaction mixture was cooled to ⁇ 40° C., and 20 ml of methylene chloride solution of 4.0 g of metachloro perbenzoic acid was added dropwise thereto. The mixture was then stirred at the same temperature for 30 minutes, and at 0° C. for 40 minutes. The reaction mixture was washed with an aqueous sodium thiosulfate solution and saturated aqueous sodium bicarbonate, and then dried over anhydrous sodium sulfate.
  • a 240 ml quantity of 1,2-dimethoxyethane (DME) and 84 ml of triethylamine (0.60 mol, 9 equivalents) were added to 30 g (66 mmol) of tolvaptan (compound (2)), and the mixture was cooled under a nitrogen stream to ⁇ 15° C.
  • a 19 ml quantity (0.20 mol, 3 equivalents) of phosphorus oxychloride (POCl 3 ) was added dropwise to the obtained mixture at an internal temperature of no more than ⁇ 12° C., and stirring was performed at ⁇ 12° C. for 2 hours.
  • a 200 ml quantity of 5 N sodium hydroxide aqueous solution was added to 1 kg of crashed ice, and the above reaction mixture were added in small portions thereto with stirring.
  • To the obtained mixture was added 500 ml of toluene.
  • the mixture was heated to 50° C. and then separated into an aqueous layer and a toluene layer.
  • a 500 ml quantity of toluene was added again to the aqueous layer, stirring was performed at 50° C., and the mixture was then separated into an aqueous layer and a toluene layer.
  • the aqueous layer was cooled to 10° C., 80 ml of 6 N hydrochloric acid was added thereto, and extraction was performed with 500 ml of ethyl acetate twice.
  • the extract was dried over sodium sulfate and filtered, and the filtrate was concentrated.
  • the concentrate was dried under reduced pressure at room temperature to give 34 g of amorphous compound (1b).
  • the ethyl acetate layer was washed with a saturated aqueous sodium hydrogen carbonate solution, dried over sodium sulfate, and then filtered, and the filtrate was concentrated.
  • the purified product was concentrated under reduced pressure, and the residue was dissolved in a mixed solvent of 10 ml of acetonitrile and 10 ml of water and then freeze-dried to give 450 mg of white amorphous solid target compound.
  • the ethyl acetate layer was dried over sodium sulfate and then filtered, and the filtrate was concentrated.
  • the purified product was concentrated under reduced pressure, and the residue was recrystallized from water-containing methanol to give 250 mg of white powdery target compound.
  • a 130 ml quantity of 1 N sodium hydroxide aqueous solution was added dropwise to the obtained reaction mixture at an internal temperature of not more than 0° C., 200 ml quantity of water was further added thereto, and washing was performed with toluene twice.
  • the obtained aqueous solution was cooled in an ice-methanol bath, 1 N HCl was added dropwise thereto at an internal temperature of not more than 0° C., and extraction was performed with ethyl acetate.
  • the ethyl acetate layer was dried over sodium sulfate and then filtered, and the filtrate was concentrated to give 6.8 g of white amorphous solid target compound.
  • a 300 mg quantity (0.5 mmol) of the compound of Example 28 was added to 5 ml of 28% aqueous ammonia, and the obtained mixture was stirred at room temperature for three days. To this mixture was added 1 N hydrochloric acid. The precipitated solids were collected by filtration and then dried to give 100 mg of white powdery target compound.
  • Compound (1b) as obtained in Example 3 or 4 was added in excess to 0.1 N sodium phosphate buffer (pH 5, pH 6, pH 7, pH 8, pH 9, or pH 10), 0.1 N Tris/HCl buffer (pH 8 or pH 9), 0.1 N sodium hydrogencarbonate/HCl buffer (pH 8) or 0.1 N sodium citrate buffer (pH 8), and then shaken at room temperature for 16 days. If the test compound dissolved even after about 6 to about 8 w/v % had been added thereto, no further test compound was added.
  • test compound A suitable amount of test compound is added to a test tube, and 2.5 ml of water is added thereto. After shaking at 37° C. for 30 minutes, the mixture is filtered through a 0.45- ⁇ m membrane filter, and 0.5 ml of the filtrate is accurately weighed. Mobile phase is added thereto to make exactly 50 ml, preparing a test solution (dilution ratio: 100-fold). Approximately 5 mg of free-form authentic sample is accurately weighed, and acetonitrile is added thereto to make exactly 50 ml. A 2 ml of this liquid is accurately weighed, and mobile phase is added thereto to make exactly 20 ml, preparing a standard solution (equivalent to 10 ⁇ g/ml). By liquid chromatography under the following conditions, 20 ⁇ l of both the test solution and standard solution are tested to obtain the peak areas At and As of the test solution and standard solution.
  • Tolvaptan was added in excess to Britton-Robinson buffer (pH 2, pH 7, or pH 12) or purified water, and then shaken at 25° C. ⁇ 1° C. for 4 hours. Each solution was filtered through a filter, and then, using HPLC, the solubility of tolvaptan was quantified by absolute calibration.
  • a 79 mg quantity of sodium dihydrogenphosphate.dihydrate and 5 g of mannitol were dissolved in about 90 ml of water for injection.
  • a sodium hydroxide solution was added thereto, and a solution of pH 7 was prepared.
  • Compound (1b) equivalent to 100 mg of tolvaptan was dissolved in this solution.
  • a sodium hydroxide solution was added thereto, and the pH was adjusted to 7.
  • Injection solvent was added to the obtained solution to make 100 ml, and sterile filtration was performed with a 0.2- ⁇ m filter to prepare a solution of compound (1b) (equivalent to 1 mg of tolvaptan per ml of solution).
  • This solution was rapidly administered to female rats via the tail vein at a dose such that 1 mg of tolvaptan is produced per kg of body weight. From time to time, blood was collected from the jugular vein under light ethyl ether anesthesia, and serum concentration of tolvaptan was determined by high-speed liquid chromatography (HPLC).
  • HPLC high-speed liquid chromatography
  • Tolvaptan was initially detected five minutes after the intravenous administration of a solution of compound (1b) to female rats. This indicates that compound (1b) is rapidly hydrolyzed into tolvaptan in rats.
  • a 1 g quantity of sodium hydrogencarbonate was dissolved in about 400 ml of water for injection.
  • a sodium hydroxide solution was added thereto to adjust the pH to 9.0, and water for injection was added thereto, preparing 500 ml of 0.2% sodium hydrogencarbonate solution.
  • An 89 ⁇ l quantity of 1 N sodium hydroxide solution and compound (1b) equivalent to 20 mg of tolvaptan were added to about 40 ml of this 0.2% sodium hydrogencarbonate solution and dissolved.
  • a 0.2% sodium hydrogencarbonate solution was further added thereto to make 50 ml, thereby preparing a solution of compound (1b) (equivalent to 0.4 mg of tolvaptan per ml of solution). The pH of this solution was 9.1. This solution is called “Solution A” hereinafter.
  • Solution A and Suspension B were each administered by forced oral administration using a sonde for oral administration at a dose of 2.5 ml/kg of body weight, producing 1 mg of tolvaptan per kg of body weight.
  • the blood samples were collected from the jugular vein under light ethyl ether anesthesia periodically after dosing, and the serum concentrations of tolvaptan were determined by using UPLC-MS/MS (Waters).
  • a 79 mg quantity of sodium dihydrogenphosphate.dihydrate and 5 g of mannitol were dissolved in about 90 ml of injection solvent.
  • a sodium hydroxide solution was added thereto, preparing a solution of pH 7.
  • Compound (1b) equivalent to 100 mg of tolvaptan was added to this solution.
  • a sodium hydroxide solution was added thereto, adjusting the pH to 7.
  • Injection solvent was added to the obtained solution to make 100 ml, and sterile filtration was performed using a 0.2- ⁇ m filter to give an injection of the present invention containing compound (1b) (equivalent to 1 mg of tolvaptan per ml of injection).
  • a 79 mg of sodium dihydrogenphosphate.dihydrate and 5 g mannitol were dissolved in about 90 ml of injection solvent.
  • a sodium hydroxide solution was added thereto, preparing a solution pH of 7.5.
  • Compound (1b) equivalent to 10 mg of tolvaptan was dissolved in the solution.
  • Injection solvent was added to the obtained solution to make 100 ml, and sterile filtration was performed with a 0.2- ⁇ m filter to prepare an injection of the present invention containing compound (1b) (equivalent to 0.1 mg tolvaptan per ml of injection).
  • a 380 mg quantity of trisodium phosphate-dodecahydrate and 4 g of mannitol were dissolved in about 90 ml of injection solvent.
  • Compound (1b) equivalent to 100 mg, 300 mg or 1000 mg of tolvaptan was dissolved in the obtained solution.
  • a sodium hydroxide solution was added to improve the solubility.
  • the pH of each obtained solution was adjusted to 8 to 9 with sodium hydroxide or hydrochloric acid, and an injection solvent was added thereto to make 100 ml.
  • the obtained solution was sterile-filtered through a 0.2- ⁇ m filter, preparing injections of the present invention containing compound (1b) (equivalent to 1 mg, 3 mg or 10 mg of tolvaptan per ml of injection).

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US20110071084A1 (en) * 2007-06-26 2011-03-24 Kazumi Kondo Benzazepine derivatives useful as vasopressin antagonists

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TW201427669A (zh) * 2012-12-28 2014-07-16 Otsuka Pharma Co Ltd 包含有光學活性托伐普坦（ｔｏｌｖａｐｔａｎ）之可注射的補給配方，及其製造方法
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JP2021014406A (ja) * 2017-10-25 2021-02-12 トーアエイヨー株式会社 バソプレシン受容体拮抗剤
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