USRE40278E1 - Heterocyclic amines having central nervous system activity - Google Patents

Heterocyclic amines having central nervous system activity Download PDF

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USRE40278E1
USRE40278E1 US10/117,634 US11763494A USRE40278E US RE40278 E1 USRE40278 E1 US RE40278E1 US 11763494 A US11763494 A US 11763494A US RE40278 E USRE40278 E US RE40278E
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mixture
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Arthur G. Romero
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Pharmacia and Upjohn Co
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D471/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
    • C07D471/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains two hetero rings
    • C07D471/06—Peri-condensed systems
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    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
    • A—HUMAN NECESSITIES
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Definitions

  • the present invention is directed toward tricyclic nitrogen containing compounds, heterocyclic amines, having anxiolytic and anti-depressant activity. These new compounds are suitable for treating central nervous system disorders including schizophrenia, Parkinson's disease, anxiety or as compounds for lowering blood pressure or treating migraines.
  • PCT Int. Pub. No. WO87/04153 and PCT Int. Pub. No. WO88/04292 each describe tricyclic structures having central nervous system activity.
  • U.S. Pat. No. 4,110,339 discloses 4-(di-n-propyl)amino-1,3,4,5-tetrahydrobenz(cd)indole compounds useful as prolactin inhibitors and in the treatment of Parkinsonism.
  • European Patent Application 153,083 and German Patent 3,346,573 disclose methoxy substituted 4-(di-n-propyl)amino-1,3,4,5-tetrahydrobenz(cd)indole compounds.
  • These publications disclose nitrogen containing tricyclic ring structures but the nitrogen is not shared by any of the rings.
  • PCT Int. Pub. No. WO 90/15058 discloses compounds with the characteristic tricyclic nitrogen containing structure of the subject invention with the exception of the ring nitrogen “X” substituents.
  • the present invention is directed toward tricyclic nitrogen containing compounds of Formula I: and pharmaceutically acceptable salts thereof.
  • R 1 and R 2 are independently hydrogen, C 1-6 alkyl or R 1 and R 2 are joined to form pyrrolidine, piperidine, morpholine or imidazole.
  • X is OCH 3 , SO 2 R 3 , SO 2 CF 3 or CN where R 3 is C 1-6 alkyl or an Aryl; and
  • Y is hydrogen, Cl, Br, F, CN, CONR 1 R 2 , CF 3 , OCH 3 , SO 2 NR 1 R 2 .
  • the present invention is a method for treating central nervous system (CNS) disorders influenced by 5-HT 1A receptors such as anxiety, depression, hypertension and associated high blood pressure, Parkinson's disease and schizophrenia in animal or human hosts by administering a pharmaceutically effective amount of a compound of Formula I including pharmaceutically acceptable salts.
  • CNS central nervous system
  • 5-HT 1A receptors such as anxiety, depression, hypertension and associated high blood pressure, Parkinson's disease and schizophrenia
  • Other uses for these compounds include panic attacks, eating disorders, obsessive-compulsive disturbances seen in dementia disorders.
  • central 5-HT receptor activation are believed to be involved in mediating sexual behavior and therefore these compounds would be useful to stimulate sexual activity and to alleviate impotence.
  • the present invention describes compounds of Formula I, above, having central nervous system activity.
  • the compounds are characterized by a tricyclic ring structure having a shared nitrogen atom between two rings, an amine substituent (NR 1 R 2 ) and a substituted ring nitrogen (X) as structurally depicted by Formula I.
  • the systematic names for the ring systems in these compounds may be found by consulting the Ring Systems Handbook, 1988 edition, published by Chemical Abstracts Service. These names are derived by combining the names of benzene or a monocyclic heterocycle with the name of a bicyclic heterocycle to which it is fused. The atoms and bonds common to the fused rings are then specified to distinguish it from isomeric systems with similar names.
  • the particular compounds have been found to be active in various central nervous system screens such as hypothermia and hypoxic stress tests and have been found to be dopamine and serotonin such as, 5HT 1A receptor binding assay antagonists.
  • C 1 -C 6 alkyl means methyl, ethyl, propyl, butyl, pentyl and hexyl and isomeric forms thereof.
  • Aryl means aromatic ring structures containing five to ten carbon atoms which can be optionally substituted with halogen atoms, C 1-6 alkyl (which can be optionally substituted with halogen and hydroxyl groups) and hydroxyl groups such as phenyl, ⁇ -naphthyl, ⁇ -naphthyl, m-methylphenyl, p-trifluoromethylphenyl and the like.
  • Aryl also includes the various heteroaryl groups which contain the heteroatoms nitrogen, sulfur or oxygen to form pyridine, thiophene, furan, pyrimidine, 2-pyridyl, 3-pyridyl, 4-pyridyl, 2-pyrimidinyl, 4-pyrimidinyl, 5-pyrimidinyl, 3-pyridazinyl, 4-pryidazinyl, 3-pyrazinyl, 2-quinolyl, 3-quinolyl, 1-isoquinolyl, 3-isoquinolyl, 4-isoquinolyl, 2-quinazolinyl, 4-quinazolinyl, 2-quinoxalinyl, 1-phthalazinyl, 2-imidazolyl, 4-imidazolyl, 3-isoxazolyl, 4-isoxazolyl, 5-isoxazolyl, 3-pyrazolyl, 4-pyrazolyl, 5-pyrazolyl, 2-oxazolyl, 4-oxazolyl, 5-oxazolyl, 2-thiazoly
  • “Pharmaceutically acceptable salts” are hydrochloride, hydrobromide, hydroiodide, sulfate, phosphate, acetate, propionate, lactate, maleate, matate, succinate, tartrate, cyclohexanesulfamates, methanesulfonates, ethanesulfonates, benzenesulfonates, toluenesulfonates and other pharmaceutically acceptable counter ions for amines. Additionally, the compounds of this invention may be administered in a suitable hydrated form.
  • the compounds of the invention include both racemic and optically pure products which can be separated by conventional methods into the R- and S-isomers. Resolution can be accomplished using resolving agents such as optically active dibenzoyltartaric acid, camphorsulfonic acid, bis-o-toluoyltanaric acid, tartaric acid, and diacetyl tartaric acid.
  • resolving agents such as optically active dibenzoyltartaric acid, camphorsulfonic acid, bis-o-toluoyltanaric acid, tartaric acid, and diacetyl tartaric acid.
  • a second procedure useful in resolving primary and secondary amine compounds of Formula I involves their conversion to diastereomeric amides using an optically active acid.
  • the diastereomeric amides are separated and the amide bond is cleaved to afford the optically pure Formula I compounds.
  • This procedure is illustrated in PCT International Publication No. WO 90/15058 (Examples 49 and 50) for the preparation of the optical isomers using t-butoxycarbonyl-L-phenylalanine as the resolving agent.
  • the racemic compound is coupled to t-butoxycarbonyl-L-phenylalanine and the diastereomeric amide products are separated by chromatography into the (+) and ( ⁇ ) forms.
  • the ( ⁇ ) isomer is reacted with trifluoracetic acid to give ( ⁇ ) N-(5,6-dihydro-2-oxo-4H-imidazo(4,5,1-ij)quinolin-5-yl)-L-phenylalanineamide.
  • Edman degradation of this compound by reaction with phenyl isothiocyanate followed by trifluoracetic acid, removes the phenylalanine residue and affords the ( ⁇ ) form of the compound.
  • Further reaction of this product with propionaldehyde and sodium cyanoborohydride gives the ( ⁇ ) form of the active isomer.
  • the dosage regimen for treating patients with the compounds of this invention is selected in accordance with a variety of factors including the type, age, weight, sex, and medical condition of the patient, the severity of the psychosis, the route of administration and the particular compound employed.
  • An ordinarily skilled physician or psychiatrist will readily determine and prescribe the effective amount of compound to prevent or arrest the progress of the condition. In so proceeding, the physician or psychiatrist could employ relatively low dosages at first, subsequently increasing the dose until a maximum response is obtained.
  • Initial dosages of the compounds of the invention are ordinarily in the area of at least 10 mg up to about 1200 mg per day orally, which may be given in a single dose or in multiple doses. When other forms of administration are employed equivalent doses are administered. When dosages beyond 600 mg are employed, care should be taken with each subsequent dose to monitor possible toxic effects.
  • the compounds of this invention are administered in oral unit dosage forms such as tablets, capsules, pills, powders, or granules. They may also be introduced parenterally, (e.g., subcutaneously, intravenously, or intramuscularly), using forms known to the pharmaceutical art. They also may be administered rectally or vaginally in such forms as suppositories or bougies. In general, the preferred route of administration is oral.
  • the compounds of this invention can also be administered as pharmaceutically or therapeutically acceptable salt such as hydrochloride, hydrobromide, hydroiodide, sulfate, phosphate, acetate, propionate, lactate, maleate, malate, succinate, tartrate, cyclohexanesulfamates, methanesulfonates, ethanesulfonates, benzenesulfonates, toluenesulfonates and the like. Additionally, the compounds of this invention may be administered in a suitable hydrated form.
  • Example 1 1 600 Control 152 Example 2 2 565 Control 66 Example 2 3 600 1 Formula I where R 1 is hydrogen, R 2 is methyl, Y is hydrogen and X is —OCH 2 (R-enantiomer); 2 Formula I where R 1 is methyl, R 2 is methyl, Y is hydrogen and X is —OCH 2 (racemate); 3 Formula I where R 1 is methyl, R 2 is methyl, Y is hydrogen and X is —OCH 2 (R-enantiomer).
  • Potassium carbonate (2.05 g, 14.8 mmol) was added to a solution of(R)-5-N-(N-methyltrifluoromethylacetamido)-1-methoxy-5,6-dihydro-4H-imidazo[4,5,1-ij]quinolin-2(1H)-one (7a, 3.75 g, 11.4 mmol) in methanol (75 ml). The mixture was stirred at reflux for 7 hours. The solvent was removed under vacuum, and the residue was partitioned between diethylether and water( 18 75 ml). The aqueous solution was saturated with brine and extracted twice more with diethylether.
  • the combined organic extracts were dried (MgSO 4 ), and the solvent was removed under vacuum to leave an oil. After standing for three days, the aqueous developed a precipitate which was extracted twice with 75% tetrahydrofuran in diethylether. The combined organic extracts were dried (MgSO 4 ), and the solvent was removed under vacuum to leave a brown semisolid. The combined samples were purified via flash chromatography (230-400 mesh silica gel, 70-80% tetrahydrofuran in ethyl acetate to give the title compound as an amber oil (2.7 g, 100%).
  • the amine (1, 33.51 g, 0.135 mol) was dissolved in propionic anhydride (78.2 g, 0.60 mol) while controlling the temperature with an ice bath.
  • the mixture was stirred at room temperature for 5 hours, and water (100 ml) was added, saturated NaHCO 3 (200 ml) was slowly added, and then 10% Na 2 CO 3 was slowly added to neutralize the mixture to pH 7.5.
  • the mixture was extracted with diethylether, saturated with sodium chloride, and extracted again with diethylether and a mixture of diethylether and chloroform. The combined extracts were washed with 5% Na 2 CO 3 and brine.
  • the solution was dried (MgSO 4 ), and the solvent was removed under vacuum to leave an amber oil.

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US6001936A (en) * 1997-10-24 1999-12-14 3M Innovative Properties Company Dye enhanced durability through controlled dye environment
US6455564B1 (en) * 1999-01-06 2002-09-24 Pharmacia & Upjohn Company Method of treating sexual disturbances
US20060040929A1 (en) * 1999-01-06 2006-02-23 Mccall Robert B (5R)-(methylamino)-5,6-dihydro-4H-imidazo[4,5,1-ij]quinoline-2(1H)-thione and method of preparation thereof
AU767089B2 (en) 1999-02-05 2003-10-30 Pharmacia & Upjohn Company Process to prepare (5R)-(methylamino)-5,6-dihydro-4H- imidazo(4,5,1-ij)-quinolin-2(1H)-one
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BR0314525A (pt) * 2002-10-04 2005-07-26 Pharmacia Corp Composições e métodos para tratamento de disfunção sexual
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JP2007500728A (ja) * 2003-07-31 2007-01-18 アイアールエム・リミテッド・ライアビリティ・カンパニー Ｐｄｆインヒビターとしての二環式化合物および組成物
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