Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2002-05-10
2003-07-29
Kifle, Bruck (Department: 1624)
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Heterocyclic carbon compounds containing a hetero ring...
C544S091000
Reexamination Certificate
active
06599900
ABSTRACT:
CROSS REFERENCE TO RELATED APPLICATION
This application claims benefit under Title 35, United States Code, §119 of European Patent Application No. 01111644.9, filed May 14, 2001.
BACKGROUND OF THE INVENTION
Substance P is a naturally occurring undecapeptide belonging to the tachykinin family of peptides, the latter being so-named because of their prompt contractile action on extravascular smooth muscle tissue. The receptor for substance P is a member of the superfamily of G protein-coupled receptors.
The neuropeptide receptor for substance P (NK-1) is widely distributed throughout the mammalian nervous system (especially brain and spinal ganglia), the circulatory system and peripheral tissues (especially the duodenum and jejunum) and are involved in regulating a number of diverse biological processes. The central and peripheral actions of the mammalian tachykinin substance P have been associated with numerous inflammatory conditions including migraine, rheumatoid arthritis, asthma, and inflammatory bowel disease as well as mediation of the emetic reflex and the modulation of central nervous system (CNS) disorders such as Parkinson's disease (Neurosci. Res., 1996, 7, 187-214), anxiety (Can. J. Phys., 1997, 75, 612-621) and depression (Science, 1998, 281, 1640-1645).
Evidence for the usefulness of tachykinin receptor antagonists in pain, headache, especially migraine, Alzheimer's disease, multiple sclerosis, attenuation of morphine withdrawal, cardiovascular changes, oedema, such as oedema caused by thermal injury, chronic inflammatory diseases such as rheumatoid arthritis, asthma/bronchial hyperreactivity and other respiratory diseases including allergic rhinitis, inflammatory diseases of the gut including ulcerative colitis and Crohn's disease, ocular injury and ocular inflammatory diseases reviewed in “Tachykinin Receptor and Tachykinin Receptor Antagonists”, J. Auton. Pharmacol., 13, 23-93, 1993.
Furthermore, Neurokinin 1 receptor antagonists are being developed for the treatment of a number of physiological disorders associated with an excess or imbalance of tachykinin, in particular substance P. Examples of conditions in which substance P has been implicated include disorders of the central nervous system such as anxiety, depression and psychosis (WO 95/16679, WO 95/18124 and WO 95/23798).
The neurokinin-1 receptor antagonists are further useful for the treatment of motion sickness and for treatment induced vomiting.
In addition, in The New England Journal of Medicine, Vol. 340, No. 3 190-195, 1999 has been described the reduction of cisplatin-induced emesis by a selective neurokinin-1-receptor antagonist.
Furthermore, U.S. Pat. No. 5,972,938 describes a method for treating a psychoimmunologic or a psychosomatic disorder by administration of a tachykinin receptor, such as NK-1 receptor antagonist.
The usefulness of neurokinin 1 receptor antagonists for the treatment of certain forms of urinary incontinence is further described in “Neuropeptides, 32(1), 1-49, (1998)” and “Eur. J. Pharmacol., 383(3), 297-303, (1999)”.
NK1 receptor antagonists have been reported to have also a beneficial effect in the therapy of traumatic brain injury (oral disclosure by Prof. Nimmo at the International Tachykinin Conference 2000 in La Grande Motte, France, Oct. 17-20, 2000 with the title “Neurokinin 1 (NK-1) Receptor Antagonists Improve the Neurological Outcome Following Traumatic Brain Injury” (Authors: A. J. Nimmo, C. J. Bennett, X. Hu, I. Cernak, R. Vink).”
SUMMARY OF THE INVENTION
The present invention relates to compounds of the general formula
wherein
(R
1
)
n
is independently from each other halogen, lower alkyl or lower alkoxy;
R
2
is hydrogen, lower alkyl, lower halogen-alkyl, —(CH
2
)
m
—OH, —(CH
2
)
m
—NR
2
, —(CH
2
)
m
O-lower alkyl, —(CH
2
)
m
—C(O)—NR
2
, or is —(CH
2
)
m
-6-membered heteroaryl, optionally substituted by one or more lower alkoxy, —(CH
2
)
m
-5 or 6-membered not aromatic heterocyclyl, optionally substituted by hydroxy or lower alkyl;
R is hydrogen or lower alkyl and may be the same or different in case of R
2
;
n is 0, 1, or 2;
m is 0, 1, 2, 3 or 4;
and to pharmaceutically acceptable acid addition salts thereof
The compounds of formula I and their salts are characterized by valuable therapeutic properties. It has been surprisingly found that the compounds of the present invention are antagonists of the Neurokinin 1 (NK-1, substance P) receptor.
DETAILED DESCRIPTION OF THE INVENTION
The present invention relates to compounds of formula I and pharmaceutically acceptable salts thereof, the preparation of the above-mentioned compounds, medicaments containing them and their manufacture as well as the use of the above-mentioned compounds in the control or prevention of illnesses, especially of illnesses and disorders of the kind referred to earlier or in the manufacture of corresponding medicaments.
The compounds of formula I can also be used in form of their prodrugs. Examples are esters, N-oxides, phosphate esters, glycoamide esters, glyceride conjugates and the like. The prodrugs may add to the value of the present compounds advantages in adsorption, pharmacokinetics in distribution and transport to the brain.
The most preferred indications in accordance with the present invention are those, which include disorders of the central nervous system, for example the treatment or prevention of certain depressive disorders or emesis by the administration of NK-1 receptor antagonists. A major depressive episode has been defined as being a period of at least two weeks during which, for most of the day and nearly every day, there is either depressed mood or the loss of interest or pleasure in all, or nearly all activities.
The following definitions of the general terms used in the present description apply irrespective of whether the terms in question appear alone or in combination.
As used herein, the term “lower alkyl” denotes a straight- or branched-chain alkyl group containing from 1-7 carbon atoms, for example, methyl, ethyl, propyl, isopropyl, n-butyl, i-butyl, t-butyl and the like. Preferred lower alkyl groups are groups with 1-4 carbon atoms.
The term “halogen-lower alkyl” denotes a lower alkyl group, wherein one or more hydrogen atom(s) is/are replaced by halogen.
The term “lower alkoxy” denotes a group wherein the alkyl residues are as defined above, and which is attached via an oxygen atom.
The term “halogen” denotes chlorine, iodine, fluorine and bromine.
The term “6-membered heteroaryl” denotes groups, such as triazinyl, pyridinyl, pyrazinyl, pyrimidinyl or pyridazinyl. Preferred are triazinyl- and pyridinyl groups.
The term “5 or 6-membered non aromatic heterocyclyl” denotes groups, such as pyrrolidinyl, imidazolidinyl, tetrahydro-pyranyl, piperidyl, piperazinyl or morpholinyl. Preferred are piperazinyl-, morpholinyl-, piperidyl-, tetrahydro-pyranyl- and pyrrolidinyl-groups.
The term “pharmaceutically acceptable acid addition salts” embraces salts with inorganic and organic acids, such as hydrochloric acid, nitric acid, sulfuric acid, phosphoric acid, citric acid, formic acid, fumaric acid, maleic acid, acetic acid, succinic acid, tartaric acid, methanesulfonic acid, p-toluenesulfonic acid and the like.
Exemplary preferred are compounds of formula 1, in which R
2
is hydrogen, for example the following compounds:
(5RS)-9-(3,5-bis-trifluoromethyl-benzoyl)-5-(3-chloro-phenyl)-1-oxa-3,9-diaza-spiro[5.5]undecan-2-one,
(5RS)-9-(3,5-bis-trifluoromethyl-benzoyl)-5-(3,4-difluoro-phenyl)-1-oxa-3,9-diaza-spiro[5.5]undecan-2-one,
(5RS)-9-(3,5-bis-trifluoromethyl-benzoyl)-5-(3,4-dichloro-phenyl)-1-oxa-3,9-diaza-spiro[5.5]undecan-2-one,
(5RS)-9-(3,5-bis-trifluoromethyl-benzoyl)-5-phenyl-1-oxa-3,9-diaza-spiro[5.5]undecan-2-one,
(5RS)-9-(3,5-bis-trifluoromethyl-benzoyl)-5-(2,3-difluoro-phenyl)-1-oxa-3,9-diaza-spiro[5.5]undecan-2-one and
(5RS)-9-(3,5-bis-trifluoromethyl-benzoyl)-5-(2,5-difluoro-phenyl)-1-oxa-3,9-diaza-spiro[5.5]undecan-2-one.
Further preferred are compounds of formula I, wherein R
2
Barsy Dawn Muszynski
Cai Hai-Ying
Dillon Michael Patrick
Galley Guido
Goergler Annick
Hall Robert C.
Kifle Bruck
Peries Rohan
Syntex (U.S.A.) LLC
LandOfFree
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