4,7-dioxobenzothiazole-2-carboxamide derivatives, their preparation and their therapeutic uses

1. The compound of general formula (I)

in racemic, enantiomeric form or combination thereof, wherein:

R 1 is a hydrogen atom, alkyl, alkoxyalkyl, alkylthioalkyl, cycloalkyl, —(CH 2 )—X—Y, —(CH 2 )—Z—NR 6 R 7 radical or a —CHR 8 R 9 radical,

X is a bond or a linear or branched alkylene radical comprising 1 to 5 carbon atoms,

Y is a saturated cyclic carbon system comprising 1 to 3 condensed rings, wherein each ring independently comprises 3 to 7 members, or Y is a saturated heterocycle comprising 1 to 2 heteroatoms including O, N or S and attached to X by an N or CH member, said saturated heterocycle comprising 2 to 6 additional members, each independently including —CHR 10 —, —CO—, —NR 11 —, —O— or —S—, R 10 is a hydrogen atom or an alkyl radical and R 11 is a hydrogen atom or an alkyl or aralkyl radical, or Y is a carbocyclic or heterocyclic aryl radical optionally substituted by 1 to 3 substituents including a halogen atom, an alkyl radical, a haloalkyl radical, an alkoxy radical, a haloalkoxy radical, a hydroxy radical, a nitro radical, a cyano radical, a phenyl radical, an SO 2 NHR 12 radical or NR 13 R 14 radical, R 12 is a hydrogen atom or an alkyl or phenyl radical, and R 13 and R 14 are each independently-alkyl radicals,

Z is a bond or a linear or branched alkylene radical comprising 1 to 5 carbon atoms,

R 6 and R 7 are each independently a hydrogen atom, an alkyl, aralkyl or —(CH 2 ) n —OH radical, wherein n is an integer from 1 to 6,

or R 6 is an alkoxycarbonyl, haloalkoxycarbonyl or aralkoxycarbonyl radical and R 7 is a hydrogen atom or a methyl radical,

or R 6 and R 7 , together with the nitrogen atom to which they are attached, form a heterocycle with 4 to 7 members comprising 1 to 2 heteroatoms, wherein the members necessary for completing the heterocycle are each independently —CR 15 R 16 —, —O—, —S— or —NR 17 — radicals, R 15 and R 16 are each independently a hydrogen atom or an alkyl radical, and R 17 is a hydrogen atom, an alkyl, or aralkyl radical, or R 17 is a phenyl radical optionally substituted by 1 to 3 substituents including a halogen atom, an alkyl or alkoxy radical,

R 8 and R 9 , together with the carbon atom to which they are attached, form an indanyl or tetralinyl radical, or R 8 and R 9 , together with the carbon atom to which they are attached, form a saturated heterocycle comprising 5 to 7 members and 1 to 2 heteroatoms including O, N or S, wherein the nitrogen atoms of said heterocycle are optionally substituted by alkyl radicals or a benzyl radical;

R 2 is a hydrogen atom, an alkyl radical, or an aralkyl radical;

or R 1 and R 2 , together with the nitrogen atom to which they are attached, form a heterocycle with 4 to 8 members comprising 1 to 2 heteroatoms, wherein the members necessary for completing the heterocycle are each independently —CR 18 R 19 —, —O—, —S— or —NR 20 — radicals, R 18 and R 19 are each independently a hydrogen atom or an alkyl radical, and R 20 is a hydrogen atom, an alkyl radical, or an aralkyl radical;

R 3 represents is a hydrogen atom or a halogen atom;

R 4 is an alkyl radical, a haloalkyl radical, a cycloalkyl radical, a cycloalkylalkyl radical, an alkoxyalkyl radical, carbocyclic or heterocyclic aryl radicals or carbocyclic or heterocyclic aralkyl radicals the aryl nucleus of which is optionally substituted by 1 to 3 substituents independently including a halogen atom, an alkyl radical, an alkoxy radical, a haloalkyl radical or —SO 2 —NH 2 radical,

or R 4 is —(CH 2 ) m —[O—(CH 2 ) p ] q —O-Alk, —(CH 2 ) r —[O—(CH 2 ) s ] t —NR 21 R 22 or —(CH 2 ) v -A, wherein m, p and s are each independently an integer from 2 to 4, q is an integer from 1 to 4, t is an integer from 0 to 4, r is an integer from 2 to 12 and v is an integer from 1 to 12, Alk is an alkyl radical, R 21 is a hydrogen atoms, an alkyl, alkoxycarbonyl, or aralkoxycarbonyl radical, R 22 is a hydrogen atom or an alkyl radical and A is a saturated heterocycle comprising 1 to 2 heteroatoms independently including O, N or S and attached to the —(CH 2 ) v — group by an N or CH member, said saturated heterocycle including 2 to 6 additional members independently including —CHR 23 —, —CO—, —NR 24 —, —O— or —S—, R 23 is a hydrogen atom or an alkyl radical and R 24 is a hydrogen atom, an alkyl radical, an alkoxycarbonyl, or aralkoxycarbonyl group,

or R 4 is

wherein R 1 , R 2 , and R 3 are as defined above, and L is —(CH 2 ) g —[O—(CH 2 ) w ] x —[O—(CH 2 ) y ] z or —(CH 2 ) a -Ω-(CH 2 ) b —, wherein g, w and y are integers from 2 to 4, x is an integer from 1 to 3 and z is 0 or 1, a and b are independently integers from 2 to 6 and Ω is —O—, —S—, —NR 25 , —CO—, —CO—NR 26 —, —CR 27 R 28 —, a cycloalkylene radical containing 3 to 7 carbon atoms, or a carbocyclic aryl radical, R 25 is an alkyl radical, R 26 is a hydrogen atom or a methyl radical, R 27 and R 28 are each independently a hydrogen atom or a methyl group;

or R 4 is

R 5 is a hydrogen atom, an alkyl, or aralkyl radical, or R 5 is R 4 when R 4 is a carbocyclic or heterocyclic alkyl, haloalkyl, alkoxyalkyl or aralkyl radical, the aryl nucleus of which is optionally substituted by 1 to 3 substituents independently including a halogen atom, an alkyl radical, an alkoxy radical, a haloalkyl radical or —SO 2 —NH 2 radical;

or R 4 and R 5 , together with the nitrogen atom to which they are attached, form a saturated heterocycle with 4 to 7 members comprising 1 to 2 heteroatoms, wherein the members necessary for completing the heterocycle are each independently —CR 29 R 30 —, —O—, —S— or —NR 31 —, R 29 and R 30 are a hydrogen atom, an alkyl, or aralkyl radical and R 31 is —COR 32 or —SO 2 R 33 ,

R 32 is an alkyl radical, a carbocyclic aryl radical optionally substituted by 1 to 3 substituents including a halogen atom, an alkyl radical, or an alkoxy radical, or R 32 is a heterocyclic aryl radical or a saturated heterocycle comprising 5 to 7 members and 1 to 2 heteroatoms including O, N or S,

R 33 is a hydrogen atom or an alkyl radical,

or R 4 and R 5 , together with the nitrogen atom to which they are attached, form a heterocyclic aryl radical including

the aromatic ring of which may be substituted by 1 to 3 by substituents including an alkyl radical or an alkoxy radical;

or a salt thereof.

2. Compound according to claim 1 , wherein R 4 is not

or salt thereof.

3. Compound according to claim 1 , wherein R 4 is

or salt thereof.

4. Compound according to claim 1 , wherein the compound is:

5-{[2-(dimethylamino)ethyl]amino}-2-(morpholin-4-ylcarbonyl)-1,3-benzothiazole-4,7-dione;

tert-butyl{2-[2-(2-{[(5-{[2-(dimethylamino)ethyl]amino}-4,7-dioxo-4,7-dihydro-1,3-benzothiazol-2-yl)carbonyl]amino}ethoxy)ethoxy]ethyl}carbamate;

N,N-dibenzyl-5-{[2-(dimethylamino)ethyl]amino}-4,7-dioxo-4,7-dihydro-1,3-benzothiazole-2-carboxamide;

5-{[2-(dimethylamino)ethyl]amino}-N,N-bis(2-methoxyethyl)-4,7-dioxo-4,7-dihydro-1,3-benzothiazole-2-carboxamide;

5-{[2-(dimethylamino)ethyl]amino}-4,7-dioxo-N-[3-(2-oxopyrrolidin-1-yl)propyl]-4,7-dihydro-1,3-benzothiazole-2-carboxamide;

4,7-dioxo-N-[3-(2-oxopyrrolidin-1-yl)propyl]-5-[(2-pyrrolidin-1-ylethyl)amino]-4,7-dihydro-1,3-benzothiazole-2-carboxamide;

5-{[2-(dimethylamino)ethyl]amino}-N-isobutyl-4,7-dioxo-4,7-dihydro-1,3-benzothiazole-2-carboxamide;

tert-butyl(4-{[(5-{[2-(dimethylamino)ethyl]amino}-4,7-dioxo-4,7-dihydro-1,3-benzothiazol-2-yl)carbonyl]amino}butyl)carbamate;

5-{[2-(dimethylamino)ethyl]amino}-2-{[4-(2-furoyl)piperazin-1-yl]carbonyl}-1,3-benzothiazole-4,7-dione;

5-{[2-(dimethylamino)ethyl]amino}-N-(2-methoxyethyl)-4,7-dioxo-4,7-dihydro-1,3-benzothiazole-2-carboxamide;

N-butyl-5-{[2-(dimethylamino)ethyl]amino}-4,7-dioxo-4,7-dihydro-1,3-benzothiazole-2-carboxamide;

N-benzyl-5-{[2-(dimethylamino)ethyl]amino}-4,7-dioxo-4,7-dihydro-1,3-benzothiazole-2-carboxamide;

N-(cyclohexylmethyl)-5-{[2-(dimethylamino)ethyl]amino}-4,7-dioxo-4,7-dihydro-1,3-benzothiazole-2-carboxamide;

N,N′-(oxydiethane-2,1-diyl)bis(5-{[2-(dimethylamino)ethyl]amino}-4,7-dioxo-4,7-dihydro-1,3-benzothiazole-2-carboxamide);

N,N′-[ethane-1,2-diylbis(oxyethane-2,1-diyl)]bis(5-{[2-(dimethylamino)ethyl]amino}-4,7-dioxo-4,7-dihydro-1,3-benzothiazole-2-carboxamide);

5-{[2-(dimethylamino)ethyl]amino}-2-{[4-(morpholin-4-ylcarbonyl)piperazin-1-yl]carbonyl}1,3-benzothiazole-4,7-dione;

2-{[4-(morpholin-4-ylcarbonyl)piperazin-1-yl]carbonyl}-5-[(2-pyrrolidin-1-ylethyl)amino]1,3-benzothiazole-4,7-dione;

5-{[2-(dimethylamino)ethyl]amino}-N-(4-methoxyphenyl)-4,7-dioxo-4,7-dihydro-1,3-benzothiazole-2-carboxamide;

5-{[2-(dimethylamino)ethyl]amino}-2-{[4-(methylsulphonyl)piperazin-1-yl]carbonyl}-1,3-benzothiazole-4,7-dione;

5-{[2-(dimethylamino)ethyl]amino}-2-{[4-(tetrahydrofuran-2-ylcarbonyl)piperazin-1-yl]carbonyl}-1,3-benzothiazole-4,7-dione;

6-bromo-5-{[2-(dimethylamino)ethyl]amino}-2-{[4-(tetrahydrofuran-2-ylcarbonyl)piperazin-1-yl]carbonyl}-1,3-benzothiazole-4,7-dione;

5-{[2-(dimethylamino)ethyl]amino}-2-(pyrrolidin-1-ylcarbonyl)-1,3-benzothiazole-4,7-dione;

5-{[2-(dimethylamino)ethyl]amino}-2-{[4-(2-thienylcarbonyl)piperazin-1-yl]carbonyl}-1,3-benzothiazole-4,7-dione;

5-{[2-(dimethylamino)ethyl]amino}-N-ethyl-4,7-dioxo-4,7-dihydro-1,3-benzothiazole-2-carboxamide;

N-(4-chlorophenyl)-5-{[2-(dimethylamino)ethyl]amino}-4,7-dioxo-4,7-dihydro-1,3-benzothiazole-2-carboxamide;

N-1,3-benzodioxol-5-yl-5-{[2-(dimethylamino)ethyl]amino}-4,7-dioxo-4,7-dihydro-1,3-benzothiazole-2-carboxamide;

5-[(2-methoxyethyl)amino]-2-{[4-(tetrahydrofuran-2-ylcarbonyl)piperazin-1-yl]carbonyl}-1,3-benzothiazole-4,7-dione;

5-(4-methylpiperazin-1-yl)-2-{[4-(tetrahydrofuran-2-ylcarbonyl)piperazin-1-yl]carbonyl}-1,3-benzothiazole-4,7-dione;

5-[(2-pyridin-2-ylethyl)amino]-2-{[4-(tetrahydrofuran-2-ylcarbonyl)piperazin-1-yl]carbonyl}-1,3-benzothiazole-4,7-dione;

5-[(3-morpholin-4-ylpropyl)amino]-2-{[4-(tetrahydrofuran-2-ylcarbonyl)piperazin-1-yl]carbonyl}-1,3-benzothiazole-4,7-dione;

5-[(1-benzylpyrrolidin-3-yl)amino]-2-{[4-(tetrahydrofuran-2-ylcarbonyl)piperazin-1-yl]carbonyl}-1,3-benzothiazole-4,7-dione;

5-[(2-cyclohexylethyl)amino]-2-{[4-(tetrahydrofuran-2-ylcarbonyl)piperazin-1-yl]carbonyl}-1,3-benzothiazole-4,7-dione;

5-{[2-(dimethylamino)ethyl]amino}-N-(4-fluorophenyl)-4,7-dioxo-4,7-dihydro-1,3-benzothiazole-2-carboxamide;

6-{[2-(dimethylamino)ethyl]amino}-2-(pyrrolidin-1-ylcarbonyl)-1,3-benzothiazole-4,7-dione;

5-{[2-(dimethylamino)ethyl]amino}-N-(3-fluoro-4-methoxyphenyl)-4,7-dioxo-4,7-dihydro-1,3-benzothiazole-2-carboxamide;

5-{[2-{dimethylamino)ethyl]amino}-2-[(6-methoxy-3,4-dihydroquinolin-1(2H)-yl)carbonyl]-1,3-benzothiazole-4,7-dione;

5-{(2-(dimethylamino)ethyl]amino}-2-{[4-(4-methoxybenzoyl)piperazin-1-yl]carbonyl}-1,3-benzothiazole-4,7-dione;

5-{[2-(dimethylamino)ethyl](methyl)amino]-N-ethyl-4,7-dioxo-4,7-dihydro-1,3-benzothiazole-2-carboxamide;

N-ethyl-5-{[2-(4-fluorophenyl)ethyl]amino}-4,7-dioxo-4,7-dihydro-1,3-benzothiazole-2-carboxamide;

or salt thereof.

5. A pharmaceutical composition comprising a compound of formula (I) according to claim 1 or a pharmaceutically acceptable salt thereof. according to claim 1 or a pharmaceutically acceptable salt thereof.

6. A pharmaceutical composition comprising, as an active ingredient, a compound of formula (I) according to claim 1 or a pharmaceutically acceptable salt thereof, and at least one pharmaceutically acceptable excipient.

7. A compound according to claim 1 , wherein the compound is 5-{[2-(dimethylamino)ethyl]amino}-2-{[4-(2-furoyl)piperazin-1-yl]carbonyl}-1,3-benzothiazole-4,7-dione.

8. A pharmaceutical composition comprising a compound of the formula according to claim 7 or a pharmaceutically acceptable salt thereof.

9. A pharmaceutical composition comprising, as an active ingredient, a compound of the formula according to claim 7 or a pharmaceutically acceptable salt thereof, and at least one pharmaceutically acceptable excipient.

10. A compound according to claim 1 , wherein the compound is 6-{[2-(dimethylamino)ethyl]amino}-2-(pyrrolidin-1-ylcarbonyl)-1,3 -benzothiazole-4,7-dione.

11. A pharmaceutical composition comprising a compound of the formula according to claim 10 or a pharmaceutically acceptable salt thereof.

12. A pharmaceutical composition comprising, as an active ingredient, a compound of the formula according to claim 10 or a pharmaceutically acceptable salt thereof, and at least one pharmaceutically acceptable excipient.