1,4-diaryl-pyrimidopyridazine-2,5-diones and their use

1. A compound of the formula (I)

in which

A represents CH or N,

R 1 represents hydrogen, halogen, cyano, nitro, (C 1 -C 6 )-alkyl, difluoromethyl, trifluoromethyl, (C 1 -C 6 )-alkoxy, difluoromethoxy, trifluoromethoxy, amino, mono- or di-(C 1 -C 6 )-alkylamino

or

represents a group of the formula —NH—C(═O)—R 6 , —NH—C(═O)—NHR 6 , —NH—SO 2 —R 7 or —S(O) n —R 8 in which

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

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

R 8 represents (C 1 -C 6 )-alkyl which may be substituted by hydroxyl, (C 1 -C 4 )-alkoxy, amino, mono- or di-(C 1 -C 4 )-alkylamino, hydroxycarbonyl, aminocarbonyl, (C 3 -C 6 )-cycloalkyl or phenyl, or represents (C 2 -C 6 )-alkenyl, (C 3 -C 6 )-cycloalkyl or phenyl,

where the (C 3 -C 6 )-cycloalkyl groups mentioned may be substituted up to two times by identical or different substituents from the group consisting of (C 1 -C 4 )-alkyl, hydroxyl and (C 1 -C 4 )-alkoxy

and

the phenyl groups mentioned may be substituted up to two times by identical or different substituents from the group consisting of fluorine, chlorine, cyano, (C 1 -C 4 )-alkyl, difluoromethyl, trifluoromethyl, (C 1 -C 4 )-alkoxy, difluoromethoxy and trifluoro-methoxy,

and

n represents the number 0, 1 or 2,

R 2 represents hydrogen, represents (C 1 -C 6 )-alkyl or (C 1 -C 6 )-alkenyl, each of which may be substituted up to three times by fluorine, or represents phenyl, pyridyl or pyrimidinyl,

where phenyl, pyridyl and pyrimidinyl for their part may be substituted up to two times by identical or different substituents from the group consisting of fluorine, chlorine, cyano, (C 1 -C 4 )-alkyl, trifluoromethyl, (C 1 -C 4 )-alkoxy and trifluoromethoxy,

or

R 2 represents a group of the formula —C(═O)—O—R 9 , -L 1 -C(═O)—O—R 10 , -L 2 -C(═O)—NR 11 R 12 , -L 2 -SO 2 —NR 11 R 12 , -L 2 -C(═O)—NR 13 —NR 11 R 12 or -L 2 -SO 2 —R 14 in which

L 1 represents (C 1 -C 6 )-alkanediyl,

L 2 represents a bond or (C 1 -C 6 )-alkanediyl,

R 9 represents (C 1 -C 6 )-alkyl,

R 10 represents hydrogen or (C 1 -C 6 )-alkyl,

R 11 and R 12 are identical or different and independently of one another represent hydrogen, (C 1 -C 6 )-alkyl, (C 3 -C 6 )-cycloalkyl or 4- to 6-membered heterocyclyl,

where (C 1 -C 6 )-alkyl, (C 3 -C 6 )-cycloalkyl and 4- to 6-membered heterocyclyl for their part may be substituted up to two times by identical or different substituents from the group consisting of fluorine, hydroxyl, (C 1 -C 4 )-alkoxy, oxo, amino, mono- or di-(C 1 -C 4 )-alkylamino, hydroxycarbonyl, (C 1 -C 4 )-alkoxycarbonyl and aminocarbonyl and where in (C 1 -C 6 )-alkyl a CH 2 group may be exchanged for an oxygen atom if this results in a chemically stable compound,

or

R 11 and R 12 together with the nitrogen atom to which they are attached form a 4- to 6-membered heterocycle which may contain a further ring heteroatom from the group consisting of N, O, S, SO and SO 2 and which may be substituted up to two times by identical or different substituents from the group consisting of (C 1 -C 4 )-alkyl, hydroxyl, (C 1 -C 4 )-alkoxy, oxo, amino, mono- and di-(C 1 -C 4 )-alkyl-amino,

where (C 1 -C 4 )-alkyl for its part may be substituted by hydroxyl or (C 1 -C 4 )-alkoxy,

R 13 represents hydrogen or (C 1 -C 4 )-alkyl

and

R 14 represents (C 1 -C 6 )-alkyl, (C 3 -C 6 )-cycloalkyl, phenyl or 5- or 6-membered heteroaryl,

where (C 1 -C 6 )-alkyl may be substituted by fluorine, chlorine, hydroxyl, (C 1 -C 4 )-alkoxy, mono- or di-(C 1 -C 4 )-alkylamino

and

phenyl and 5- or 6-membered heteroaryl for their part may be substituted up to two times by identical or different substituents from the group consisting of fluorine, chlorine, cyano, (C 1 -C 4 )-alkyl, trifluoromethyl, (C 1 -C 4 )-alkoxy and trifluoromethoxy,

R 3 represents (C 1 -C 6 )-alkyl or (C 2 -C 6 )-alkenyl, each of which may be substituted by hydroxyl, (C 1 -C 4 )-alkoxy, amino, mono- or di-(C 1 -C 4 )-alkylamino, hydroxycarbonyl, (C 1 -C 4 )-alkoxycarbonyl, aminocarbonyl or mono- or di-(C 1 -C 4 )-alkylaminocarbonyl,

or

represents a group of the formula -L 3 -R 15 in which

L 3 represents a bond or (C 1 -C 4 )-alkanediyl

and

R 15 represents (C 3 -C 7 )-cycloalkyl, 4- to 7-membered heterocyclyl, phenyl or 5- or 6-membered heteroaryl,

where (C 3 -C 7 ) -cycloalkyl and 4- to 7-membered heterocyclyl for their part may be substituted up to two times by identical or different substituents from the group consisting of (C 1 -C 4 )-alkyl, oxo, hydroxyl and (C 1 -C 4 )-alkoxy

and

phenyl and 5- or 6-membered heteroaryl for their part may be substituted up to two times by identical or different substituents from the group consisting of fluorine, chlorine, cyano, (C 1 -C 4 )-alkyl, trifluoromethyl, (C 1 -C 4 )-alkoxy, trifluoromethoxy and amino,

R 4 represents nitro or trifluoromethyl

and

R 5 represents hydrogen, fluorine or chlorine,

or a salt thereof.

2. The compound according to claim 1 in which

A represents CH,

R 1 represents hydrogen, fluorine, chlorine, cyano, nitro, (C 1 -C 4 )-alkyl, difluoromethyl, trifluoromethyl, (C 1 -C 4 )-alkoxy, difluoromethoxy, trifluoromethoxy, amino, mono- or di-(C 1 -C 4 )-alkylamino

or

represents a group of the formula —NH—C(═O)—R 6 , —NH—SO 2 —R 7 or —SO 2 —R 8 in which

R 6 and R 7 each represent (C 1 -C 4 )-alkyl

and

R 8 represents (C 1 -C 4 )-alkyl which may be substituted by hydroxyl, (C 1 -C 4 )-alkoxy, hydroxycarbonyl, aminocarbonyl, (C 3 -C 6 )-cycloalkyl or phenyl, or represents (C 3 -C 6 )-cycloalkyl or phenyl,

where the mentioned phenyl groups may be substituted up to two times by identical or different substituents from the group consisting of fluorine, chlorine, cyano, methyl, trifluoromethyl, methoxy and trifluoromethoxy,

R 2 represents hydrogen, (C 1 -C 4 )-alkyl or (C 2 -C 4 )-alkenyl

or

represents a group of the formula -L 1 -C(═O)—O—R 10 , -L 2 -C(═O)—NR 11 R 12 or

-L 2 -SO 2 —R 14 in which

L 1 represents methylene or ethane- 1,2-diyl,

L 2 represents a bond, methylene, ethane- 1,1 -diyl or ethane- 1,2-diyl,

R 10 represents hydrogen or (C 1 -C 4 )-alkyl,

R 11 represents hydrogen or (C 1 -C 4 )-alkyl which may be substituted by hydroxyl or (C 1 -C 4 )-alkoxy,

R 12 represents hydrogen, (C 1 -C 6 )-alkyl or (C 3 -C 6 )-cycloalkyl,

where (C 1 -C 6 )-alkyl may be substituted up to two times by identical or different substituents from the group consisting of hydroxyl, (C 1 -C 4 )-alkoxy, hydroxycarbonyl, (C 1 -C 4 )-alkoxycarbonyl and aminocarbonyl and where in (C 1 -C 6 )-alkyl a CH 2 group may be exchanged for an oxygen atom if this results in a chemically stable compound,

or

R 11 and R 12 together with the nitrogen atom to which they are attached form a 5- or 6-membered heterocycle which may contain a further ring heteroatom from the group consisting of N, O and S and which may be substituted by (C 1 -C 4 )-alkyl, hydroxyl, (C 1 -C 4 )-alkoxy or

oxo,

where (C 1 -C 4 )-alkyl for its part may be substituted by hydroxy or (C 1 -C 4 )-alkoxy,

and

R 14 represents (C 1 -C 4 )-alkyl, (C 3 -C 6 )-cycloalkyl or phenyl,

where phenyl may be substituted up to two times by identical or different substituents from the group consisting of fluorine, chlorine, cyano, methyl, trifluoromethyl, methoxy and trifluoro-methoxy,

R 3 represents (C 1 -C 4 )-alkyl which may be substituted by hydroxyl, (C 1 -C 4 )-alkoxy, hydroxycarbonyl, (C 1 -C 4 )-alkoxycarbonyl, aminocarbonyl, mono-or di-(C 1 -C 4 )-alkylaminocarbonyl or 5- or 6-membered heteroaryl, represents (C 2 -C 4 )-alkenyl

or

represents a group of the formula -L 3 -R 15 in which

L 3 represents a bond or (C 1 -C 4 )-alkanediyl

and

R 15 represents (C 3 -C 7 )-cycloalkyl, 4- to 6-membered heterocyclyl or phenyl,

where 4- to 6-membered heterocyclyl for its part may be substituted by oxo

and

phenyl for its part may be substituted up to two times by identical or different substituents from the group consisting of fluorine, chlorine, cyano, methyl, trifluoromethyl, methoxy and trifluoro-methoxy,

R 4 represents trifluoromethyl

and

R 5 represents hydrogen or fluorine,

or a salt thereof.

3. The compound according to claim 1 in which

A represents CH,

R 1 represents hydrogen, fluorine, chlorine, nitro, methyl, difluoromethyl, trifluoromethyl, methoxy, trifluoromethoxy or a group of the formula —SO 2 —R 8 in which

R 8 represents (C 1 -C 4 )-alkyl which may be substituted by hydroxyl, methoxy or ethoxy,

R 2 represents hydrogen, (C 1 -C 4 )-alkyl or a group of the formula —CH 2 —C(═O)—O—R 10 or —CH 2 —C(═O)—NR 11 R 12 in which

R 10 represents (C 1 -C 4 )-alkyl,

R 11 represents hydrogen or methyl,

R 12 represents hydrogen or (C 1 -C 4 )-alkyl which may be substituted by hydroxyl, methoxy or ethoxy

or

R 11 and R 12 together with the nitrogen atom to which they are attached form a pyrrolidino, piperidino or morpholino ring,

R 3 represents (C 1 -C 4 )-alkyl which may be substituted by hydroxyl, pyrrolidino, piperidino, morpholino or pyridyl, represents allyl or represents a group of the formula -L 3 -R 15 in which

L 3 represents a bond, methylene or ethane-1,2-diyl

and

R 15 represents (C 3 -C 7 )-cycloalkyl or phenyl,

where phenyl for its part may be substituted up to two times by identical or different substituents from the group consisting of fluorine, chlorine, cyano, methyl and trifluoromethyl,

R 4 represents trifluoromethyl

and

R 5 represents hydrogen,

or a salt thereof.

4. The compound according to claim 1 in which

A represents CH,

R 1 represents hydrogen, trifluoromethyl or methylsulphonyl,

R 2 represents hydrogen or a group of the formula —CH 2 —C(═O)—NR 11 R 12 in which

R 11 and R 12 independently of one another represent hydrogen or methyl

or

R 11 and R 12 together with the nitrogen atom to which they are attached form a pyrrolidino ring,

R 3 represents methyl, ethyl, 2-hydroxyethyl or 2-(morpholin-4-yl)ethyl,

R 4 represents trifluoromethyl

and

R 5 represents hydrogen,

or a salt thereof.

5. ( rac )-4-{7-Methyl-2,5-dioxo-1-[3-(trifluoromethyl)phenyl]-1,2,3,4,5,6,7,8- octahydropyrimido [4,5-d]pyridazin-4-yl}-3-(methylsulphonyl)benzonitrile, as represented by:

6. 4-{(4S)-7-Methyl-2,5-dioxo-1-[3-trifluoromethyl)phenyl]-1,2,3,4,5,6,7,8- octahydropyrimido-[4,5 d]pyridazin-4-yl}-3-(methylsulphonyl)benzonitrile, as represented by:

7. A composition comprising a compound as defined in claim 1 and one or more inert non-toxic pharmaceutically acceptable auxiliaries.

8. A composition comprising a compound as defined in claim 1 . and one or more additional active compounds selected from kinase inhibitors, stimulators and activators of soluble guanylate cyclase, prostacyclin analogs, endothelin receptor antagonists, phosphodiesterase inhibitors, beta-adrenergic receptor agonists, matrix metalloprotease inhibitors, serotonin antagonists, anticholinergics and glucocorticoids.

9. A process for preparing compounds of the formula (I) as defined in claim 1 , wherein a compound of the formula (II)

in which A and R 1 have the meanings given in claim 1

is condensed in the presence of an acid or an acid anhydride in a 3-component one-pot reaction or sequentially with an acetoacetic ester of the formula (III)

in which

T represents methyl or ethyl,

and a phenylurea derivative of the formula (IV)

in which R 4 and R 5 have the meanings given in claim 1 ,

to give a compound of the formula (V-A)

in which A, T, R 1 , R 4 and R 5 each have the meanings given above,

and this compound is then

[A] in the case that R 2 in formula (I) represents hydrogen, brominated in an inert solvent to give a compound of the formula (VI-A)

in which A, T, R 1 , R 4 and R 5 each have the meanings given above,

and subsequently reacted with a hydrazine derivative of the formula (VII)

R 3 —NH—NH 2   (VII),

in which R 3 has the meaning given in claim 1 ,

with formation of a six-membered ring to give a compound of the formula (I-A)

in which A, R 1 , R 3 , R 4 and R 5 each have the meanings given above,

or

[B] in the case that R 2 in formula (I) is different from hydrogen, initially reacted with a compound of the formula (VIII)

R 2A —X  (VIII),

in which

R 2A has the meaning of R 2 given in claim 1 , but does not represent hydrogen,

and

X represents a leaving group such as, for example, halogen, mesylate, tosylate or triflate,

in the presence of a base to give a compound of the formula (V-B)

in which A, T, R 1 , R2A , R 4 and R 5 each have the meanings given above,

then brominated in an inert solvent to give a compound of the formula (VI-B)

in which A, T, R 1 , R 2A , R 4 and R 5 each have the meanings given above,

and subsequently reacted with a hydrazine derivative of the formula (VII)

R 3 —NH—NH 2   (VII),

in which R 3 has the meaning given in claim 1 ,

with cyclization to give a compound of the formula (I-B)

in which A, R 1 , R 2A , R 3 , R 4 and R 5 each have the meanings given above,

and the compound of the formula (I-A) or (I-B) is optionally separated into its enantiomers and/or diastereomers and/or converted with the appropriate (i) solvents and/or (ii) bases or acids into a salt thereof.