Phosphoramidate derivatives of 5-fluoro-2′-deoxyuridine for use in the treatment of cancer

1. A pharmaceutical formulation suitable for intravenous administration, said formulation comprising a compound of formula (I), or a pharmaceutically acceptable salt, hydrate or solvate thereof, and a pharmaceutically acceptable excipient, carrier or diluent:

wherein

Ar is a fused bicyclic aryl moiety or a monocyclic aryl moiety, either of which aryl moieties is carbocyclic or heterocyclic and is optionally substituted;

R 3 is alkyl, which is optionally substituted;

R 4 is H or alkoyl;

R 1 and R 2 are independently selected from the group consisting of H and alkyl, or R 1 and R 2 together form an alkylene chain so as to provide, together with the C atom to which they are attached, a cyclic system, or one of R 1 and R 2 comprises an alkylene chain attached to N, the H atom attached to N is absent and one of R 1 and R 2 comprise H or alkyl, any of which said alkyl moieties or alkylene chains may be substituted;

wherein the compound is not a compound having, in combination, Ar as unsubstituted phenyl, R 3 as CH 3 , R 4 as H, one of R 1 and R 2 as H and one of R 1 and R 2 as CH 3 .

2. The formulation according to claim 1 wherein Ar is 1-naphthyl.

3. The formulation according to claim 1 wherein R 4 is H.

4. The formulation according to claim 1 wherein R 3 is selected from the group consisting of benzyl and members of the group comprising C 1 to C 10 alkyls.

5. The formulation according to claim 1 wherein R 1 and R 2 correspond to the moieties attached to the alpha C atom in L-alanine.

6. The formulation according to claim 1 wherein the compound of Formula (I) is selected from the group consisting of:

5-Fluoro-2′-deoxyuridine-5′-O-[phenyl(benzoxy- L -alaninyl)]phosphate (CPF 381);

5-Fluoro-2′-deoxyuridine-5′-O-[phenyl(ethoxy- L -alaninyl)]phosphate (CPF383);

5-Fluoro-2′deoxyuridine-5′-O-[phenyl(isopropoxy- L -alaninyl)]phosphate (CPF384);

5-Fluoro-2′deoxyuridine-5′-O-[phenyl(cyclohexoxy- L -alaninyl)]phosphate (CPF508);

5-Fluoro-2′deoxyuridine-5′-O-[p-nitro-phenyl(ethoxy- L -alaninyl)]phosphate (CPF430);

5-Fluoro-2′deoxyuridine-5′-O-[1-naphthyl(benzoxy- L -alaninyl)]phosphate (CPF373);

5-Fluoro-2′deoxyuridine-5′-O-[1-naphthyl(methoxy- L -alaninyl)]phosphate (CPF385);

5-Fluoro-2′deoxyuridine-5′-O-[1-naphthyl(ethoxy- L -alaninyl)]phosphate (CPF386);

5-Fluoro-2′deoxyuridine-5′-O-[1-naphthyl(isopropoxy- L -alaninyl)]phosphate (CPF387);

5-Fluoro-2′deoxyuridine-5′-O-[1-naphthyl(cyclohexoxy- L -alaninyl)]phosphate (CPF509);

5-Fluoro-2′deoxyuridine-5′-O-[phenyl(benzoxy-α,α-dimethylglycine)]phosphate (CPF393);

5-Fluoro-2′deoxyuridine-5′-O-[phenyl(ethoxy-α,α-dimethylglycine)]phosphate (CPF394);

5-Fluoro-2′deoxyuridine-5′-O-[1-naphthyl(benzoxy-α,α-dimethylglycine)]phosphate (CPF395);

5-Fluoro-2′deoxyuridine-5′-O-[1-naphthyl(ethoxy-α,α-dimethylglycine)]phosphate (CPF396);

5-Fluoro-2′-deoxyuridine-5′-O-[phenyl(benzoxy-L-prolinyl)]phosphate (CPF583);

5-Fluoro-2′-deoxyuridine-5′-O-[1-naphthyl(benzoxy-L-prolinyl)]phosphate (CPF577);

5-Fluoro-2′-deoxyuridine-5′-O-[1-naphthyl(3,3-dimethyl-1-butoxy-L-alaninyl)]phosphate (CPF585);

5-Fluoro-2′-deoxyuridine-5′-O-[1-naphthyl-(cyclobutoxy-L-alaninyl)]phosphate (CPF578);

5-Fluoro-2′-deoxyuridine-5′-O-[1-naphthyl-(cyclopropylmethanoxy-L-alaninyl)]phosphate (CPF579);

5-Fluoro-2′-deoxyuridine-5′-O-[1-naphthyl-(tetrahydropyroxy-L-alaninyl)]phosphate (CPF580);

5-Fluoro-2′-deoxyuridine-5′-O-[1-naphthyl-(pentoxy-L-alaninyl)]phosphate (CPF581);

5-Fluoro-2′-deoxyuridine-5′-O-[1-naphthyl-(cyclopentoxy-L-alaninyl)]phosphate (CPF582);

5-Fluoro-2′-deoxyuridine-5′-O-[1-naphthyl-(2-indanoxy-L-alaninyl)]phosphate (CPF597);

5-Fluoro-2′-deoxyuridine-5′-O-[phenyl-(benzoxy-L-methioninyl)]phosphate (CPF586);

5-Fluoro-2′-deoxyuridine-5′-O-[1-naphthyl-(benzoxy-L-phenylalaninyl)]phosphate (CPF587);

5-Fluoro-2′-deoxyuridine-5′-O-[1-naphthyl-(2,2-dimethylpropoxy-L-alaninyl)]phosphate (CPF588);

5-Fluoro-2′-deoxyuridine-5′-O-[1-naphthyl-(butoxy-L-alaninyl)]phosphate (CPF589);

5-Fluoro-2′-deoxyuridine-5′-O-[phenyl(ethoxy-L-valinyl)]phosphate;

5-Fluoro-2′-deoxyuridine-5′-O-[phenyl(benzoxy-L-leucinyl)]phosphate;

5-Fluoro-2′-deoxyuridine-5′-O-[phenyl(benzoxy-L-isoleucinyl)]phosphate;

5-Fluoro-2′-deoxyuridine-5′-O-[phenyl(benzoxy-L-phenylalaninyl)]phosphate;

5-Fluoro-2′-deoxyuridine-5′-O-[phenyl(pentoxy-L-methioninyl)]phosphate;

5-Fluoro-2′-deoxyuridine-5′-O-[1-naphthyl(hexoxy-L-alaninyl)]phosphate;

5-Fluoro-2′-deoxyuridine-5′-O-[1-naphthyl(cyclohexoxy-L-valinyl)]phosphate;

5-Fluoro-2′-deoxyuridine-5′-O-[1-naphthyl(pentoxy-L-leucinyl)]phosphate;

5-Fluoro-2′-deoxyuridine-5′-O-[1-naphthyl(benzoxy-L-leucinyl)]phosphate;

5-Fluoro-2′-deoxyuridine-5′-O-[1-naphthyl(pentoxy-L-isoleucinyl)]phosphate;

5-Fluoro-2′-deoxyuridine-5′-O-[1-naphthyl(pentoxy-L-phenylalaninyl)]phosphate;

5-Fluoro-2′-deoxyuridine-5′-O-[1-naphthyl(benzoxy-L-methioninyl)]phosphate; and

5-Fluoro-2′-deoxyuridine-5′-O-[1-naphthyl(pentoxy-α,α-dimethylglycine)]phosphate, or a pharmaceutically acceptable salt, hydrate or solvate thereof.

7. A method of treatment of cancer, the method comprising administering intravenously to a patient in need thereof, an effective dose of a compound of formula (I) or a pharmaceutically acceptable salt, hydrate or solvate thereof:

wherein

Ar is a fused bicyclic aryl moiety or a monocyclic aryl moiety, either of which aryl moieties is carbocyclic or heterocyclic and is optionally substituted;

R 3 is alkyl, which is optionally substituted;

R 4 is H or alkoyl;

R 1 and R 2 are independently selected from the group consisting of H and alkyl, or R 1 and R 2 together form an alkylene chain so as to provide, together with the C atom to which they are attached, a cyclic system, or one of R 1 and R 2 comprises an alkylene chain attached to N, the H atom attached to N is absent and one of R 1 and R 2 comprise H or alkyl, any of which said alkyl moieties or alkylene chains may be substituted;

wherein the compound is not a compound having, in combination, Ar as unsubstituted phenyl, R 3 as CH 3 , R 4 as H, one of R 1 and R 2 as H and one of R 1 and R 2 as CH 3 ;

wherein said cancer is selected from gastrointestinal cancer, leukemia, lymphoma, pancreatic cancer, prostate cancer, lung cancer, breast cancer, cervical cancer, head and neck cancer and ovarian cancer.

8. The method of claim 7 , wherein the compound of Formula (I) is administered as an aqueous solution or suspension.

9. The method of claim 8 , wherein the aqueous solution or suspension comprises an aqueous vehicle selected from Ringers solution and isotonic sodium chloride.

10. A formulation suitable for intravenous administration, said formulation comprising 5-fluoro-2′-deoxyuridine-5′-O-[1-naphthyl(benzoxy- L -alaninyl)]phosphate (CPF373) and a pharmaceutically acceptable excipient, carrier or diluent.

11. The formulation of claim 10 , wherein the formulation is an aqueous solution or suspension.

12. The formulation of claim 11 , wherein the formulation comprises an aqueous vehicle selected from Ringers solution and isotonic sodium chloride.

13. A method of treatment of cancer, the method comprising administering intravenously to a patient in need thereof, an effective dose of 5-fluoro-2′deoxyuridine-5′-O-[1-naphthyl(benzoxy-L-alaninyl)]phosphate (CPF373); wherein said cancer is selected from gastrointestinal cancer, leukemia, lymphoma, pancreatic cancer, prostate cancer, lung cancer, breast cancer, cervical cancer, head and neck cancer and ovarian cancer.

14. The method of claim 13 , wherein the 5-fluoro-2′-deoxyuridine-5′-O-[1-naphthyl(benzoxy- L -alaninyl)]phosphate (CPF373) is administered as an aqueous solution or suspension.

15. The method of claim 14 , wherein the aqueous solution or suspension comprises an aqueous vehicle selected from Ringers solution and isotonic sodium chloride.

16. The method of claim 13 wherein said cancer is gastrointestinal cancer.

17. The method of claim 16 wherein said gastrointestinal cancer is selected from oesophageal cancer, gastric cancer, small intestine cancer, stomach cancer and colon and rectum cancer.

18. The method of claim 17 wherein said gastrointestinal cancer is colon and rectum cancer.

19. The method according to claim 13 wherein said cancer is breast cancer.

20. The method of claim 13 wherein said cancer is lung cancer.