O.sup.6 -substituted guanine derivatives, a process for their preparation and their use in treating tumor cells
First Claim
1. O6 -alkylguanine derivatives of formula I:
- ##STR37## wherein Y is H, ribosyl, deoxyribosyl, or ##STR38## wherein X is O or S, R" and R"'"'"' are alkyl or substituted alkyl, R'"'"' is H, or alkyl or hydroxyalkylR is(i) a cyclic group having at least one 5- or 6-membered heterocyclic ring or a substituted 5- or 6-membered heterocyclic ring, optionally with a carbocyclic, substituted carbocyclic, heterocyclic or substituted heterocyclic ring fused thereto, the or each heterocyclic or substituted heterocyclic ring having at least one hetero atom chosen from O, N, or S, orii) naphthyl or a substituted naphthyl and pharmaceutically acceptable salts thereof, provided that R is not a cyclic group having a heterocyclic ring with more than one S atom in the ring.
1 Assignment
0 Petitions
Accused Products
Abstract
O6 -hetarylalkyl- or naphthylalkylguanine derivatives of the formula ##STR1## wherein Y is H, ribosyl, deoxyribosyl, or R"XCHR'"'"',
wherein X is O or S, R" and R"'"'"' are alkyl, or substituted derivatives thereof,
R'"'"' is H, or alkyl or hydroxyalkyl
R is
(i) a cyclic group having at least one 5- or 6-membered heterocyclic ring, optionally with a carbocylic or heterocyclic ring fused thereto, the or each heterocyclic ring having at least one hereto atom chosen from O, N, or S, or a substituted derivative thereof; or
(ii) naphthyl or a substituted derivative thereof
and pharmaceutically acceptable salts thereof, exhibit the ability to deplete O6 -alkylguanine-DNA alkyltransferase (ATase) activity.
A process for preparation of the compounds is described. The compounds have utility in combination with alkylating agents in the chemotherapeutic treatment of tumour cells.
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Citations
35 Claims
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1. O6 -alkylguanine derivatives of formula I:
- ##STR37## wherein Y is H, ribosyl, deoxyribosyl, or ##STR38## wherein X is O or S, R" and R"'"'"' are alkyl or substituted alkyl, R'"'"' is H, or alkyl or hydroxyalkyl
R is (i) a cyclic group having at least one 5- or 6-membered heterocyclic ring or a substituted 5- or 6-membered heterocyclic ring, optionally with a carbocyclic, substituted carbocyclic, heterocyclic or substituted heterocyclic ring fused thereto, the or each heterocyclic or substituted heterocyclic ring having at least one hetero atom chosen from O, N, or S, or ii) naphthyl or a substituted naphthyl and pharmaceutically acceptable salts thereof, provided that R is not a cyclic group having a heterocyclic ring with more than one S atom in the ring. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 27, 28, 29, 30, 31)
- ##STR37## wherein Y is H, ribosyl, deoxyribosyl, or ##STR38## wherein X is O or S, R" and R"'"'"' are alkyl or substituted alkyl, R'"'"' is H, or alkyl or hydroxyalkyl
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19. O6 -(4-bromothenyl)guanine.
- 21. A pharmaceutical composition comprising O6 -(4-bromothenyl)guanine and a pharmaceutically acceptable excipient.
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25. A method for depleting O6 -alkylguanine-DNA alkyltransferase activity in a host comprising:
administering to the host an effective O6 -alkylguanine-DNA alkyltransferase activity depleting amount of a composition comprising O6 -(4-bromothenyl)guanine and a pharmaceutically acceptable excipient.
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26. A method for treating tumour cells in a host comprising:
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administering to the host a composition comprising O6 -(4bromothenyl)guanine in an amount effective to deplete O6 -alkylguanine-DNA alkyltransferase activity sufficiently to enhance the effectiveness of a chemotherapeutic alkylating agent; and administering to the host a composition comprising an alkylating agent in an amount which is effective in combination with said composition comprising O6 -(4bromothenyl)guanine for treating said tumour cells.
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32. O6 -alkylguanine derivatives of the formula I:
- ##STR40## wherein Y is H, ribosyl, deoxyribosyl, or ##STR41## wherein X is O or S, R" and R"'"'"' are alkyl or substituted alkyl, R'"'"' is H, or alkyl or hydroxyalkyl;
R is (i) a cyclic group having at least one 5- or 6-membered heterocyclic ring or a substituted 5- or 6-membered heterocyclic ring, optionally with a carbocyclic, substituted carbocyclic, heterocyclic or substituted heterocyclic ring fused thereto, the or each heterocyclic or substituted heterocyclic ring having at least one hetero atom chosen from O, N, or S, or ii) naphthyl or a substituted naphthyl and pharmaceutically acceptable salts thereof, provided that R is not a cyclic group having a heterocyclic ring with more than one S atom in the ring; and
provided that when Y or R is substituted as aforesaid the compound has the ability to deplete O6 alkylguanine-DNA alkyltransferase activity.
- ##STR40## wherein Y is H, ribosyl, deoxyribosyl, or ##STR41## wherein X is O or S, R" and R"'"'"' are alkyl or substituted alkyl, R'"'"' is H, or alkyl or hydroxyalkyl;
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33. O6 -alkylguanine derivatives of the formula I:
- ##STR42## wherein Y is H, ribosyl, deoxyribosyl, or ##STR43## wherein X is O or S, R" and R"'"'"' are alkyl or suibstituted alkyl, having substitution by one or more of hydroxy, alkoxy, amino, alkylamino, amido or ureido;
R'"'"' is H or alkyl or hydroxyalkyl; R is (i) a cyclic group having at least one 5- or 6-membered heterocyclic ring or a substituted 5- or 6-membered heterocyclic ring, optionally with a carbocyclic, substituted carbocyclic, heterocyclic or substituted heterocyclic ring fused thereto, the or each heterocyclic or substituted heterocyclic ring having at least one hetero atom chosen from O, N, or S, having substitution in the substituted heterocyclic ring(s) or substituted carbocyclic ring(s) by one or more of alkyl, alkenyl, alkynyl, halo, haloalkyl, nitro, cyano, hydroxyalkyl, azido, methoxy, SOn R"" where R"" is alkyl and n=0, 1 or 2, or a carboxyl or ester group of the formula --COOR5 wherein R5 is H or alkyl;
or(ii) naphthyl or a naphthyl having substitution by one or more of alkyl, alkenyl, alkynyl, halo, haloalkyl, nitro, cyano, hydroxyalkyl, azido, methoxy, SOn R"" where R"" is alkyl and n=0, 1 or 2, or a carboxyl or ester group of tho formula --COOR5 wherein R5 is H or alkyl; and pharmaceutically acceptable salts thereof, provided that R is not a cyclic group having a heterocyclic ring with more than one S atom in the ring. - View Dependent Claims (34, 35)
- ##STR42## wherein Y is H, ribosyl, deoxyribosyl, or ##STR43## wherein X is O or S, R" and R"'"'"' are alkyl or suibstituted alkyl, having substitution by one or more of hydroxy, alkoxy, amino, alkylamino, amido or ureido;
Specification