Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...
Reexamination Certificate
2002-02-21
2004-09-14
Raymond, Richard L. (Department: 1624)
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Having -c-, wherein x is chalcogen, bonded directly to...
C546S156000
Reexamination Certificate
active
06790858
ABSTRACT:
DESCRIPTION
The gonadotropin-releasing hormone (GnRH) is a hormone that is synthesized predominantly but not exclusively in mammals by nerve cells of the hypothalamus, is transported via the portal vein to the hypophysis and is released in a regulated manner to the gonadotropic cells. By interaction with its receptor that has seven transmembrane domains, GnRH stimulates the production and the release of gonadotropic hormones by means of the second messenger inositol-1,4,5-triphosphate and Ca
2+
ions. The gonadotropin-luteinizing hormone (LH) that is released by GnRH and the follicle-stimulating hormone (FSH) stimulate the production of sex steroids and the gamete maturation in both sexes. In addition to GnRH (also referred to as GrRH1), there are two other forms of GnRH, namely GnRH2 and 3.
The GnRH receptor is used as a pharmacological target in a number of diseases that are dependent on a functioning sex hormone production, for example prostate cancer, premenopausal breast cancer, endometriosis and uterine fibroids. In the case of these diseases, GnRH superagonists or GnRH antagonists can be used successfully. In particular, the male birth control in combination with a substitution dose of androgens forms a possible further indication.
An advantage of GnRH antagonists in comparison to superagonists is their immediate effectiveness in the blocking of the gonadotropin secretion. Superagonists initially produce an overstimulation of the hypophysis, which results in increased gonadotropin and sex steroid releases.
This hormonal reaction is only completed after a certain delay based on the desensitization and downward-adjustment of the GnRH receptor concentrations. Therefore, GnRH superagonists, both alone and in combination with testosterone, may not be able to suppress effectively sperm production in males and thus are not suitable for male birth control. In contrast to this, peptide GNRH antagonists, especially in combination with a substitution dose of androgen, are able to bring about a significant oligozoospermia in humans.
Peptide GnRH antagonists, however, have a number of drawbacks. They have a considerably lower effectiveness as superagonists and consequently have to be administered at considerably higher dosages. Their oral bio-availability is also low, so that they have to be administered by injection. Repeated injections lead in turn to a reduction in compliance. Moreover, the synthesis of peptide GnRH antagonists in comparison to non-peptide compounds is costly and labor-intensive.
Quinoline derivatives as non-peptide GnRH antagonists are disclosed in, for example, WO97/14682. To date, however, it was not possible to market any non-peptide GnRH antagonists.
The object on which this invention is based consisted in providing new GnRH antagonists that are superior to the known peptide compounds and represent an effective alternative to known non-peptide compounds. The new GnRH antagonists are to have both high effectiveness and high oral bio-availability. In addition, they should be able to be synthesized simply and with as low costs as possible.
This object is achieved by compounds of general formula (1):
in which
R
1
(a) is an acyl group —CO—R11 or CN, whereby R11 is a saturated, unsaturated, cyclic and/or (hetero)aromatic organic radical, especially a straight or branched alkyl chain with 1-10 C atoms or a phenyl, furan or thiophene group that is optionally substituted by alkyl groups or halogen atoms,
(b) is a carboxylic acid ester group —CO—OR12 or a carboxylic acid amide group —CO—NR12R13 or a group —SO
x
—R12 with X=0, 1 or 2 or —SO
2
—NR12R13, whereby R12 is a saturated, unsaturated, cyclic and/or (hetero)aromatic organic radical, especially a straight or branched alkyl chain with 1-10 C atoms, an aralkyl group with 7-20 C atoms, whereby the aryl radical optionally can be substituted by alkyl groups or halogen atoms or is a phenyl radical that is optionally substituted by alkyl groups or halogen atoms, and R13 can be a hydrogen atom or a straight or branched alkyl chain with 1-10 C atoms, or
(c) is the group —A—NR14-CO—NR15R16, in which A is an alkylene group with 1-4 C atoms, especially with 1 C atom, that is optionally substituted by a C
1
-C
6
alkyl group, a carbonyl group, an oxygen atom or the group —SO
x
— with X=0, 1 or 2; R14 and R15, in each case independently are a hydrogen atom or a straight or branched alkyl chain with 1-10 C atoms, and R16 is a straight or branched alkyl chain with 1-10 C atoms, a cycloalkyl group with 3-10 C atoms, a cycloalkylalkyl group with 7-20 C atoms, an aralkyl group with 7-20 C atoms, whereby the aryl radical optionally can be substituted by alkyl groups or halogen atoms, a phenyl group that is optionally substituted by alkyl groups or halogen atoms or a heterocyclic ring that is optionally substituted by alkyl groups or halogen atoms,
R2 is a group —CH(R21)R22, whereby R21 is a hydrogen atom, a C
1
-C
10
-alkyl group or an optionally substituted phenyl ring and R22 is an optionally substituted phenyl ring or naphthyl ring, or a group —CH
2
CH(R23)R24, with R23 and R24 in the meaning of an optionally substituted phenyl ring,
R3 and R4 in each case independently are a hydrogen atom or an alkyl group with 1-10 C atoms, and R3 also can be a halogen atom,
R5 is a group that is linked via radical Z,
in which G is —C═C—, —C═N—, —N═C—, an oxygen or sulfur atom; Z is a direct bond, an oxygen atom or a sulfur atom, the group CH—R52 or —CH—R52-CH—R53-, whereby R52 and R53, independently of one another, have the meaning of a hydrogen atom or an alkyl group and n means numbers 1 and 2, a —C≡C-triple bond or an E- or Z-configured group —CR52=CR53- or C═CR52R53, whereby R52 and R53, independently of one another, have the meaning of a hydrogen atom or an alkyl group, L is a CH
2
group or an NH group, Q is a carbonyl or —SO
x
group, with X=0, 1 or 2, and R51 is an amino group that is optionally substituted by an alkyl group or a straight or branched alkyl group that is optionally substituted by halogen atoms, hydroxyl or alkoxy groups, or a cycloalkyl group with 3-7 ring members that is optionally substituted by halogen atoms, hydroxyl or alkoxy groups,
R6 is the group CH
2
—N(R61)R62, whereby R61, in each case independently, is a hydrogen atom or an alkyl group, and R62 is an alkyl group or an optionally substituted aralkyl group or a heteroarylalkyl group with 7-20 C atoms, and can mean
—W═X═Y—— the groups
in any orientation; also all stereoisomers of the above-mentioned structures and salts thereof with physiologically compatible acids or bases.
In the compounds of formula (1), by way of example
R1 means:
A straight or branched alkyl chain: A methyl, ethyl, n-propyl, iso-propyl, n-, iso-, tert-butyl, n-pentyl, 2,2-dimethylpropyl or 3-methylbutyl group; an n-hexyl, n-heptyl, n-octyl, n-nonyl, n-decyl group. The methyl or ethyl group is preferred.
A phenyl group that is optionally substituted by alkyl groups or halogen atoms: A phenyl group; an o-, m-, p-methyl, ethyl, propyl, or isopropylphenyl group; a 2,3-, 2,4-, 2,5-, 2,6-, 3,4-, 3,5-dimethyl or -diethylphenyl group; an o-, m-, p-fluoro-, chloro-, bromo- or iodophenyl group; a 2,3-, 2,4-, 2,5-, 2,6-, 3,4-, 3,5-, difluoro-, dichloro-, dibromo- or diodophenyl group or a naphthyl group. A phenyl group is preferred.
An optionally substituted furan or thiophene group: An unsubstituted 2- or 3-thienyl group; or a 2- or 3-furyl group; or a 3-methyl-, 3-ethyl-, 3-fluoro-, 3-chloro-, 3-bromo-, 3-iodo-2-furyl- or -2-thienyl group; a 4-methyl-, 4-ethyl-, 4-fluoro-, 4-chloro-, 4-bromo-, 4-iodo-2-furyl- or 2-thienyl group; a 5-methyl-, 5-ethyl-, 5-fluoro-, 5-chloro-, 5-bromo-, 5-iodo-2-furyl or -2-thienyl group; a 2-methyl-, 2-ethyl-, 2-fluoro-, 2-chloro-, 2-bromo-, 2-iodo-3-furyl or -3-thienyl group; a 4-methyl-, 4-ethyl-, 4-fluoro-, 4-chloro-, 4-bromo-, 4-iodo-3-furyl- or -3-thienyl group; a 5-methyl-, 5-ethyl-, 5-fluoro-, 5-chloro-, 5-bromo-, 5-iodo-3-furyl- or -3-thienyl gro
Buehmann Ulrich
Droescher Peter
Guenther Eckhard
Hess-Stumpp Holger
Kühne Roland
Liu Hong
Millen White Zelano & Branigan P.C.
Raymond Richard L.
Zentaris AG
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