Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...
Reexamination Certificate
2000-03-07
2001-10-16
Shah, Mukund J. (Department: 1624)
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Having -c-, wherein x is chalcogen, bonded directly to...
C514S259500, C544S282000, C544S278000, C544S284000
Reexamination Certificate
active
06303614
ABSTRACT:
The present invention concerns tetrahydro &ggr;-carbolines having a broad therapeutic potential. It further relates to their preparation, compositions comprising them and their use as a medicine.
U.S. Pat. No. 4,636,563, published on Jan. 13, 1987, and U.S. Pat. No. 4,672,117, published on Jun. 9, 1987, disclose 2-(heteroaryl-alkyl)-tetrahydro-&ggr; carbolines having antipsychotic activity. EP-A-0,705,832, published on Apr. 10, 1996, discloses 1,2,3,4-terahydro-9H-pyrido3,4-b]indolyl-alkyl-1,3-dihydro-2H-benzimidazolones as serotonergic modulators.
The compounds of the present invention are novel and have an interesting broad-spectrum receptor-binding profile. In comparison to the structurally related known compounds, they surprisingly exhibit a greater therapeutic breadth.
The present invention concerns the compounds of formula
the N-oxide forms, the pharmaceutically acceptable addition salts and the stereochemically isomeric forms thereof, wherein:
R
1
is hydrogen, C
1-6
alkyl, aryl or C
1-6
alkyl substituted with aryl;
R
2
is each independently a halogen, hydroxy, C
1-6
alkyl, C
1-6
alkyloxy or nitro;
n is 0, 1, 2 or 3;
Alk is C
1-6
alkanediyl;
D is 2(3H)benzoxazolone-3-yl or a radical of formula
wherein
each X independently represents O, S or NR
12
;
R
3
is hydrogen, C
1-6
alkyl, aryl or arylC
1-6
alkyl;
R
4
is hydrogen, C
1-6
alkyl, C
1-6
alkyloxy, C
1-6
alkylthio, amino, mono- or di(C
1-6
alkyl)amino or mono- or di(arylC
1-6
alkyl)amino;
R
5
, R
6
, R
7
, R
10
, R
11
and R
12
each independently are hydrogen or C
1-6
alkyl;
R
8
and R
9
each independently are hydrogen, C
1-6
alkyl or aryl; or
R
4
and R
5
taken together may form a bivalent radical −R
4
−R
5
— of formula
—CH
2
—CH
2
—CH
2
— (a-1);
—CH
2
—CH
2
—CH
2
—CH
2
— (a-2);
—CH═CH—CH
2
— (a-3);
—CH
2
—CH═CH— (a-4) or
—CH═CH—CH═CH— (a-5);
wherein one or two hydrogen atoms of said radicals (a-1) to (a-5) each independently may be replaced by halogen, C
1-6
alkyl, arylC
1-6
alkyl, trifluoromethyl, amino, hydroxy, C
1-6
alkyloxy or C
1-10
alkylcarbonyloxy; or where possible, two germinal hydrogen atoms may be replaced by C
1-6
alkylidene or arylC
1-6
alkylidene; or
—R
4
—R
5
—may also be
—S—CH
2
—CH
2
— (a-6);
—S—CH
2
—CH
2
—CH
2
— (a-7);
—S—CH═CH— (a-8);
—NH—CH
2
—CH
2
— (a-9);
—NH—CH
2
—CH
2
—CH
2
— (a-10);
—NH—CH═CH— (a-11);
—NH—CH═N— (a-12);
—S—CH═N— (a-13) or
—CH═CH—O— (a-14);
wherein one or where possible two or three hydrogen atoms in said radicals (a-6) to (a-14) each independently may be replaced by C
1-6
alkyl or aryl; and
aryl is phenyl or phenyl substituted with a halogen or C
1-6
alkyl.
As used in the foregoing definitions the term halogen is generic to fluoro, chloro, bromo and iodo. The term C
1-4
alkyl defines straight and branched saturated hydro-carbons, having from 1 to 4 carbon atoms such as, for example, methyl, ethyl, propyl, butyl, 1-methylethyl, 1,1-dimethylethyl, 2-methylpropyl and the like. The term C
1-6
alkyl is meant to include C
1-4
alkyl and the higher homologues thereof having 5 or 6 carbon atoms such as, for example, pentyl, hexyl or the like. The term C
1-10
alkyl is meant to include C
1-6
alkyl radicals and the higher homologues thereof having 7 to 10 carbon atoms such as, for example, heptyl, octyl, nonyl, decyl and the like. The term C
1-4
alkanediyl defines bivalent straight or branch chained alkanediyl radicals having from 1 to 4 carbon atoms such as, for example, methylene, 1,2-ethanediyl, 1,3-propanediyl, 1,4-butanediyl and the like; the term C
1-6
alkanediyl is meant to include C
1-4
alkanediyl and the higher homologues thereof having 5 or 6 carbon atoms such as, for example, 1,5-pentanediyl, 1,6-hexanediyl and the like; the term C
1-6
alkylidene defines bivalent straight or branch chained alkylidene radicals having from 1 to 6 carbon atoms such as, for example, methylene, ethylidene, 1-propylidene, 1-butylidene, 1-pentylidene, 1-hexylidene and the like.
Also as used hereinafter, the term benzyl refers to phenylmethyl. Other names for the term &ggr;-carboline are 5H-pyrido[4,3-b]indole, 3-azacarbazole and 3-azarbazole.
The addition salts as mentioned herein are meant to comprise the therapeutically active addition salt forms which the compounds of formula (I) are able to form with appropriate acids, such as, for example, inorganic acids such as hydrohalic acids, e.g. hydrochloric or hydrobromic acid; sulfuric; nitric; phosphoric and the like acids; or organic acids such as, for example, acetic, propanoic, hydroxyacetic, lactic, pyruvic, oxalic, malonic, succinic, maleic, fumaric, malic, tartaric, citric, methanesulfonic, ethanesulfonic, benzenesulfonic, p-toluenesulfonic, cyclamic, salicylic, p-amino-salicylic, pamoic and the like acids.
The pharmaceutically acceptable addition salts as mentioned hereinabove are also meant to comprise the therapeutically active non-toxic base, in particular, a metal or amine addition salt forms which the compounds of formula (I) are able to form. Said salts can conveniently be obtained by treating the compounds of formula (I) containing acidic hydrogen atoms with appropriate organic and inorganic bases such as, for example, the ammonium salts, the alkali and earth alkaline metal salts, e.g. the lithium, sodium, potassium, magnesium, calcium salts and the like, salts with organic bases, e.g. the benzathine, N-methyl-D-glucamine, hydrabamine salts, and salts with amino acids such as, for example, arginine, lysine and the like.
Conversely said salt forms can be converted by treatment with an appropriate base or acid into the free acid or base form.
The term addition salt as used hereinabove also comprises the solvates which the compounds of formula (I) are able to form and said solvates are meant to be included within the scope of the present invention. Examples of such solvates are, e.g. the hydrates, alcoholates and the like.
The N-oxide forms of the compounds of formula (I) are meant to comprise those compounds of formula (I) wherein one or several nitrogen atoms are oxidized to the so-called N-oxide.
The term stereochemically isomeric forms as used herein defines all the possible isomeric forms in which the compounds of formula (I) may occur. Unless otherwise mentioned or indicated, the chemical designation of compounds denotes the mixture of all possible stereochemically isomeric forms, said mixtures containing all diastereomers and enantiomers of the basic molecular structure.
Some of the compounds of formula (I) may also exist in their tautomeric forms. Such forms although not explicitly indicated in the above formula are intended to be included within the scope of the present invention.
Whenever used hereinafter, the term compounds of formula (I) is meant to include also the N-oxide forms, the pharmaceutically acceptable addition salts and all stereoisomeric forms.
A special group of compounds includes those compounds of formula (I) wherein one or more of the following restrictions apply:
1) R
2
is halogen, hydroxy, C
1-6
alkyl or C
1-6
alkyloxy;
2) nis 0 or 1;
3) Alk is C
1-4
alkanediyl; preferably, Alk is 1,2-ethanediyl;
4) D is a radical of formula (a) wherein R
3
is C
1-6
alkyl, aryl or arylC
1-6
alkyl; R
4
is amino, mono- or di(C
1-6
alkyl)amino, or mono- or di(arylC
1-6
alkyl)amino; or —R
4
—R
5
— is a radical of formula (a-2) or (a-5) wherein one or two hydrogen atoms each independently may be replaced by halogen, C
1-6
alkyl, trifluoromethyl or C
1-6
alkyloxy, or —R
4
—R
5
— is a radical of formula (a-6), (a-7), (a-8), (a-11), (a-13) or (a-14) wherein one or where possible two hydrogen atoms each independently may be replaced by C
1-6
alkyl;
5) D is a radical of formula (b) and R
6
and R
7
are suitably methyl;
6) D is a radical of formula (c) and R
8
is suitably hydrogen, methyl or phenyl;
7) D is a radical of formula (d) wherein R
9
is aryl; and suitably, R
9
is 4-fluoro-phenyl, a
Kennis Ludo Edmond Josephine
Mertens Josephus Carolus
Appollina Mary
Liu Hong
Shah Mukund J.
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