Dipyridyl-dihydropyrazolones and their use

1. A compound of the formula (I)

in which

A represents CH,

R 1 represents a substituent chosen from the series consisting of (C 1 -C 6 )-alkyl, trifluoromethyl, halogen, cyano, nitro, hydroxyl, (C 1 -C 6 )-alkoxy, amino, (C 1 -C 6 )-alkoxycarbonyl, hydroxycarbonyl and —C(═O)—NH—R 4 , wherein

(C 1 -C 6 )-alkyl in its turn can be substituted by hydroxyl, (C 1 -C 4 )-alkoxy, amino, mono-(C 1 -C 4 )-alkylamino, di-(C 1 -C 4 )-alkylamino or a group of the formula —NH—C(═O)—R 5 , —NH—C(═O)—NH-R 6 or —NH—SO 2 —R 7 , wherein

R 5 denotes (C 1 -C 6 )-alkyl, which can be substituted by hydroxyl, (C 1 -C 4 )-alkoxy or phenyl, or phenyl,

wherein phenyl, in turn, can be substituted once to three times in an identical or different manner by halogen, cyano, (C 1 -C 4 )-alkyl, hydroxyl, (C 1 -C 4 )-alkoxy, trifluoromethyl or trifluoromethoxy,

R 6 denotes (C 1 -C 6 )-alkyl, which can be substituted by hydroxyl or (C 1 -C 4 )-alkoxy,

and

R 7 denotes (C 1 -C 6 )-alkyl,

and

R 4 denotes hydrogen or (C 1 -C 6 )-alkyl, which can be substituted by hydroxyl, (C 1 -C 4 )-alkoxy or phenyl,

wherein phenyl in its turn can be substituted by halogen, cyano, (C 1 -C 4 )-alkyl, (C 1 -C 4 )-alkoxy, trifluoromethyl or trifluoromethoxy,

R 2 represents a substituent chosen from the series consisting of halogen, cyano, nitro, (C 1 -C 6 )-alkyl, trifluoromethyl, hydroxyl, (C 1 -C 6 )-alkoxy, trifluoromethoxy, amino, hydroxycarbonyl and —C(═O)—NH—R 8 , wherein

(C 1 -C 6 )-alkyl and (C 1 -C 6 )-alkoxy in their turn can be substituted by hydroxyl

and

R 8 denotes hydrogen or (C 1 -C 4 )-alkyl,

m represents the number 0, 1 or 2,

n represents the number 0, 1, 2 or 3,

wherein, in the case where R 1 or R 2 occur several times, their meanings can in each case be identical or different,

and

R 3 represents hydrogen, (C 1 -C 6 )-alkyl or (C 3 -C 7 )-cycloalkyl,

or a salt thereof.

2. The compound of claim 1 , in which

A represents CH,

R 1 represents a substituent chosen from the series consisting of (C 1 -C 6 )-alkyl, trifluoromethyl, cyano, nitro, hydroxyl, (C 1 -C 6 )-alkoxy, amino, (C 1 -C 6 )-alkoxycarbonyl and hydroxycarbonyl,

R 2 represents a substituent chosen from the series consisting of halogen, cyano, nitro, (C 1 -C 6 )-alkyl, trifluoromethyl, hydroxyl, (C 1 -C 6 )-alkoxy, trifluoromethoxy, amino and hydroxycarbonyl, wherein (C 1 -C 6 )-alkyl and (C 1 -C 6 )-alkoxy in their turn can be substituted by hydroxyl,

m represents the number 0, 1 or 2,

n represents the number 0, 1, 2 or 3,

wherein, in the case where R 1 or R 2 occur several times, their meanings can in each case be identical or different,

and

R 3 represents hydrogen, (C 1 -C 6 )-alkyl or (C 3 -C 7 )-cycloalkyl,

or a salt thereof.

3. The compound of the formula (I) as claimed in claim 1 , in which

A represents CH,

R 1 represents a substituent chosen from the series consisting of (C 1 -C 6 )-alkyl, fluorine, chlorine, bromine and —C(═O)—NH—R 4 , wherein

(C 1 -C 6 )-alkyl in its turn can be substituted by hydroxyl, (C 1 -C 4 )-alkoxy, amino, mono-(C 1 -C 4 )-alkylamino, di-(C 1 -C 4 )-alkylamino or a group of the formula —NH—C(═O)—R 5 , —NH—C(═O)—NH—R 6 or —NH—SO—R 7 , wherein

R 5 denotes (C 1 -C 6 )-alkyl, which can be substituted by hydroxyl, methoxy, ethoxy or phenyl, or phenyl,

wherein phenyl, in turn, can be substituted once to three times in an identical or different manner by fluorine, chlorine, bromine, cyano, methyl, hydroxyl, methoxy, ethoxy, trifluoromethyl or trifluoromethoxy,

and

R 6 and R 7 independently of one another denote (C 1 -C 6 )-alkyl,

and

R 4 denotes (C 1 -C 6 )-alkyl, which can be substituted by hydroxyl, methoxy, ethoxy or phenyl,

wherein phenyl in its turn can be substituted by fluorine, chlorine, bromine, cyano, methyl, methoxy, ethoxy, trifluoromethyl or trifluoromethoxy,

R 2 represents a substituent chosen from the series consisting of fluorine, chlorine, bromine, cyano, (C 1 -C 6 )-alkyl, trifluoromethyl, hydroxycarbonyl and —C(═O)—NH—R 3 , wherein

(C 1 -C 6 )-alkyl in its turn can be substituted by hydroxyl

and

R 8 denotes (C 1 -C 4 )-alkyl,

m represents the number 0, 1 or 2,

n represents the number 0, 1 or 2,

wherein, in the case where R 1 or R 2 occur several times, their meanings can in each case be identical or different,

and

R 3 represents hydrogen,

or a salt thereof.

4. The compound of claim 1 , in which

A represents CH,

R 1 represents a substituent chosen from the series consisting of (C 1 -C 4 )-alkyl, trifluoromethyl, nitro, (C 1 -C 4 )-alkoxy, amino and (C 1 -C 4 )-alkoxycarbonyl,

R 2 represents a substituent chosen from the series consisting of chorine, bromine, cyano, (C 1 -C 4 )-alkyl, trifluoromethyl, hydroxyl, (C 1 -C 4 )-alkoxy, trifluoromethoxy and amino, wherein (C 1 -C 4 )-alkyl and (C 1 -C 4 )-alkoxy in their turn can be substituted by hydroxyl,

m represents the number 0 or 1,

n represents the number 0, 1, 2 or 3,

wherein, in the case where R 2 occurs several times, its meanings can be identical or different,

and

R 3 represents hydrogen or methyl,

or a salt thereof.

5. The compound of claim 1 , in which

A represents CH,

R 1 represents a substituent chosen from the series consisting of (C 1 -C 4 )-alkyl, fluorine, chlorine, bromine and —C(═O)—NH—R 4 , wherein

(C 1 -C 4 )-alkyl in its turn can be substituted by hydroxyl, amino or a group of the formula —NH—C(═O)—R 5 or —NH—C(═O)—NH—R 6 , wherein

R 5 denotes (C 1 -C 4 )-alkyl, which can be substituted by phenyl or phenyl,

wherein phenyl, turn, can in each case be substituted once to three times in an identical or different manner by fluorine, chlorine, methyl or trifluoromethyl,

and

R 6 denotes (C 1 -C 4 )-alkyl,

and

R 4 denotes (C 1 -C 4 )-alkyl, which can be substituted by phenyl,

R 2 represents a substituent chosen from the series consisting of chlorine, bromine, cyano, (C 1 -C 4 )-alkyl and trifluoromethyl, wherein (C 1 -C 4 )-alkyl in its turn can be substituted by hydroxyl,

m represents the number 0, 1 or 2,

n represents the number 0, 1 or 2,

wherein in the case where R 1 or R 2 occur several times, their meanings can in each case be identical or different,

and

R 3 represents hydrogen,

or a salt thereof.

6. A compound of the formula (I-A)

in which

R 1A represents hydrogen, methyl or trifluoromethyl

and

R 2A , R 2B and R 2C are identical or different and independently of one another represent hydrogen, chlorine, bromine, cyano, methyl, hydroxymethyl, methoxy or ethoxy,

or a salt thereof.

7. A compound of the formula (I-B)

in which

R 1A and R 1B are identical or different and independently of one another represent hydrogen, fluorine, chlorine, (C 1 -C 4 )-alkyl or —C(═O)—NH—R 4 , wherein

(C 1 -C 4 )-alkyl in its turn can be substituted by hydroxyl, amino or a group of the formula —NH—C(═O)—R 5 , wherein

R 5 denotes (C 1 -C 4 )-alkyl, which can be substituted by phenyl or phenyl,

wherein phenyl, in turn, can be substituted once to three times in an identical or different manner by fluorine, chlorine, methyl or trifluoromethyl,

and

R 4 denotes (C 1 -C 4 )-alkyl, which can be substituted by phenyl,

R 2 represents a substituent chosen from the series consisting of chlorine, bromine, cyano, methyl, hydroxymethyl or trifluoromethyl

and

n represents the number 0, 1 or 2,

wherein, in the case where R 2 occurs several times, its meanings can be identical or different,

or a salt thereof.

8. A process for the preparation of a compound of the formula (I), as defined in claim 1 , comprising:

reacting a compound of the formula (II)

in which R 2 , R 3 and n in each case have the meanings given in claim 1 and

Z 1 represents methyl or ethyl,

in an inert solvent, optionally in the presence of an acid, with a compound of the formula (III)

in which A, R 1 and m in each case have the meanings given in claim 1 ,

to give compounds of the formula (IV)

in which Z 1 , A, R 1 , R 2 , R 3 , m and n have the abovementioned meanings,

cyclizing a compound of formula (IV) in an inert solvent in the presence of a base, thereby producing a compound of the formula (I), (I-A) or (I-B),

and optionally converting the compounds of formula (I), (I-A) or (I-B) corresponding (i) solvents and/or (ii) base or acid into a salt thereof.

9. A process for the preparation of a compound of the formula (I), as defined in claim 1 , in which R 3 represents hydrogen, comprising:

subjecting a compounds of the formula (V)

in which R 2 and n in each case have the meanings given in claim 1 and

Z 1 represents methyl or ethyl,

to a condensation reaction with a compound of the formula (VI)

in which

Z 2 represents methyl or ethyl,

to give a compounds of the formula (VII)

in which Z 1 , R 2 and n have the abovementioned meanings, reacting the compound of formula (VII) in the presence of an acid with a compound of the formula (III)

in which A, R 1 and m in each case have the meanings given in claim 1 ,

to give compounds of the formula (IV-A)

in which Z 1 , A, R 1 , R 2 , m and n have the abovementioned meanings, and cyclizing the compounds of formula (IV A) in an inert solvent in the presence of a base.

10. A pharmaceutical composition comprising a compound as defined in claim 1 in combination with an inert, non-toxic, pharmaceutically suitable auxiliary substance.