ACE inhibitor derivatives

1. A compound of general formula (I) or a pharmaceutically acceptable salt or stereoisomer thereof:

A—(X 1 —ONO 2 ) s   (I)

wherein:

s is an integer equal to 1 or 2;

A is:

wherein n is an integer from 1 to 6, preferably equal to 1 or 2; N 0 is —COO— or —COOR 0

wherein R 0 is H or a linear or branched (C 1 –C 10 )-alkyl;

R 1 is selected from the group consisting of:

wherein N 2 has the same meanings as defined for N 0 and they may be equal or different, N 2a is H, —C(O)—, —COO—, —COOR 0 , —C(O)R 0 — wherein R 0 is a linear or branched (C 1 –C 10 )-alkyl; with the proviso that at least one of the groups N 0 , N 2 or N 2a is —COO— or —C(O)— i.e. it has a free valence capable of binding to X 1 ;

X 1 is a linear or when possible branched (C 1 –C 6 )-alkylene, optionally substituted with at least an halogen atom, or —(CH 2 —CH 2 —S) 2 —;

provided that when A is 1a) and R 1 is the group of formula (III) is different from a linear or when possible branched (C 1 –C 6 )-alkylene.

2. A compound of general formula (I) or a pharmaceutically acceptable salt or stereoisomer thereof according to claim 1 wherein:

s is as above defined;

A is the following group:

wherein n is an integer equal to 1 or 2; N 0 is —COO— or —COOR 0 wherein R 0 is H or (C 1 –C 10 )-alkyl;

R 1 can be:

wherein N 2 has the same meanings as defined for N 0 and they may be equal or different, N 2a is H, —C(O)—, —COO—, —COOR 0 , —C(O)R 0 wherein R 0 is a linear or branched (C 1 –C 10 )-alkyl; with the proviso that at least one of the groups N 0 , N 2 or N 2a is —COO— or —C(O)— i.e. it has a free valence capable of binding to X 1 ;

X 1 is a linear (C 3 –C 5 )-alkylene or —(CH 2 –CH 2 —S) 2 —.

3. A compound of general formula (I) or a pharmaceutically acceptable salt or stereoisomer thereof according to claim 1 wherein:

s is 1;

A is:

wherein n is 1; N 0 is —COO—, that has a free valance capable of binding X 1 ;

R 1 is

X 1 is a bivalent radical equal to —(CH 2 —CH 2 —S) 2 —.

4. A compound of general formula (I) or a pharmaceutically acceptable salt or stereoisomer thereof according to claim 1 wherein:

A is the following group:

wherein n is 2; N 0 is —COO— or —COOR 0 wherein R 0 is H or (C 1 –C 10 )-alkyl;

R 1 is selected from the group consisting of:

N 2 has the same meanings as defined for N 0 and they may be equal or different, N 2a is H;

with the proviso that at least one of the groups N 0 or N 2 is —COO—;

X 1 is a linear (C 3 –C 5 )-alkylene.

5. A compound according to claim 1 , selected from the group consisting of:

6. Compounds according to claim 1 selected from the group consisting of:

N-[(1S)-1-(3-nitrooxypropoxycarbonyl)-3-phenylpropyl]-L-alanyl-L-proline hydrochloride;

N-[(1S)-1-(Ethoxycarbonyl)-3-phenylpropyl]-L-alanyl-L-proline 3-nitrooxypropyl ester hydrogen maleate;

N-[(1S)-1-(Ethoxycarbonyl)-3-phenylpropyl]-L-alanyl-L-proline 4-nitrooxybutyl ester hydrogen maleate;

N-[(1S)-1-(Ethoxycarbonyl)-3-phenylpropyl]-L-lysyl-L-proline 4-nitrooxybutyl ester dihydrochloride;

N-[(1S)-1-(ethoxycarbonyl)-3-phenylpropyl]-L-lysyl-L-proline 3-nitrooxypropyl ester dihydrochloride;

N-[(1S)-1-(3-Nitrooxypropoxycarbonyl)-3-phenylpropyl]-L-lysyl-L-proline 3-nitrooxypropyl ester dihydrochloride;

N-[(1S)-1-(4-Nitrooxybutoxycarbonyl)-3-phenylpropyl]-L-lysyl-L-proline 4-nitrooxybutyl ester dihydrochloride.

7. A compound of general formula (I) according to claim 1 for use as a medicament.

8. A pharmaceutical composition comprising a pharmaceutically effective amount of a compound of general formula (I) or a salt or stereoisomer thereof according to claim 1 and a pharmaceutically acceptable carrier.

9. A pharmaceutical composition according to claim 8 in a suitable form for the oral, parenteral, rectal, topic and transdermic administration, by inhalation spray or aerosol or iontophoresis devices.

10. Liquid or solid pharmaceutical composition for oral, parenteral, rectal, topic and transdermic administration or inhalation in the form of tablets, capsules and pills eventually with enteric coating, powders, granules, gels, emulsions, solutions, suspensions, syrups, elixir, injectable forms, suppositories, in transdermal patches or liposomes, containing a compound of formula (I) or a salt or stereoisomer thereof according to claim 1 and a pharmaceutically acceptable carrier.

11. Pharmaceutical composition comprising a compound of formula I as defined in claim 1 , a compound used to treat cardiovascular disease and a pharmaceutical acceptable carrier.

12. Pharmaceutical composition according to claim 11 wherein the compound used to treat cardiovascular disease is selected from the group consisting of: beta adrenergic blockers, calcium channel blockers, angiotensin II receptor antagonists, antithrombotics, HMGCoA reductase inhibitors, aspirin or nitrooxyderivatives of aspirin, nitrosated beta blockers, nitrosated or nitrosilated calcium channel blockers.