US 5,874,573 A · Compounds with chelation affinity and selectivity for first transition series elements: use in medical therapy

Abstract

This invention involves synthesis and use of a class of compounds with chelation affinity and selectivity for first transition series elements. Administration of the free or conjugated compound, or physiological salts of the free or conjugated compound, results in decrease in the in vivo bioavailability of first transition series elements and/or removal from the body of first transition series elements and elements with similar chemical properties. These characteristics make such compounds useful in the management of diseases associated with a bodily excess of first transition series elements and elements with similar chemical properties. This invention demonstrates that such compounds inhibit mammalian, bacterial, and fungal cell replication and are therefore useful in the treatment of neoplasia, infection, inflammation, immune response, and in termination of pregnancy. Since these compounds are capable of descreasing the in vivo availability of tissue iron they are useful in management of free radical mediated tissue damage, and oxidation mediated tissue damage. When combined with radioisotopic or paramagnetic cations of first transition series elements, or elements with chemical properties similar to those of first transition series elements, prior to their administration, the resulting complexes are useful as diagnostic agents in nuclear medicine and magnetic resonance imaging (MRI).

A pharmaceutical composition for use in medical therapy comprising:

(A) a chelating agent capable of complexing first transition series elements but not itself so complexed, said chelating agent having the formula:
##STR215## wherein, t, u and v are each independently 2 or 3;
w is an integer of from 1 to 3;
R.sup.12 and R.sup.13 are each independently selected from the group consisting of H, allyl, alkenyl, aryl, arylalkyl, alkoxy, alkylthio, alkenoxy, alkenylthio, aryloxy, arylthio, alkyl interrupted by one or more oxa, alkenyl interrupted by one or more oxa, alkyl interrupted by thia, alkenyl interrupted by thia, aryloxyalkyl, alkoxyaryl, aminoalkyl, aminoalkenyl, aminoaryl, aminoarylalkyl, hydroxyalkyl, hydroxyalkenyl, hydroxyaryl, hydroxyarylaLkyl, halogen substituted versions thereof;
R.sup.11 is a member selected from the group consisting of R.sup.12, R.sup.13 and radicals of formula:
##STR216## wherein, R.sup.41, R.sup.42 and R.sup.43 are each independently selected from the group consisting of H, alkyl, alkenyl, aryl, arylalkyl, alkoxy, alkylthio, alkenoxy, alkenylthio, aryloxy, arylthio, alkyl interrupted by oxa, alkenyl interrupted by oxa, alkyl interrupted by thia, alkenyl interrupted by thia, aryloxyalkyl, alkoxyaryl, aminoalkyl, aminoalkenyl, aminoaryl, aminoarylalkyl, hydroxyalkyl, hydroxyalkenyl, hydroxyaryl, hydroxyarylalkyl, and halogen substituted versions thereof;
R.sup.44 is a member selected from the group consisting of H, hydroxy, amino, alkyl, alkyl interrupted by oxa, alkoxy, aryl, aryloxyalkyl, alkoxyaryl, and halogen substituted versions thereof;
n is zero or 1;
and
X is a member selected from the group consisting of alkyl, alkenyl, aryl, arylalkyl, alkoxy, alkylthio, alkenoxy, aryloxy, arylthio, alkyl interrupted by one or more oxa, alkenyl interrupted by one or more oxa, alkyl interrupted by one or more thia, alkenyl interrupted by one or more thia, aryloxyalkyl, alkoxyaryl, aminoalkyl, aminoalkenyl, aminoaryl, aminoarylalkyl, hydroxyalkyl, hydroxyalkenyl, hydroxyaryl hydroxyarylalkyl, halogen substituted versions of each of the above, and radicals selected from the group consisting of:
##STR217## wherein R.sup.41, R.sup.42, R.sup.43 and R.sup.44 are each independently as described above;
R.sup.46 and R.sup.47 are each independently selected from the group consisting of H, alkyl and aryl, or taken together form a divalent linking group between the atoms to which they are attached, thereby forming a ring structure;
R.sup.48 and R.sup.49 are each independently selected from the group consisting of H, alkyl, aryl, alkoxy, alkyl interrupted by oxa, aryloxyalkyl, alkoxyaryl, and halogen substituted versions thereof;
R.sup.50, R.sup.51 and R.sup.52 are each independently selected from the group consisting of H, alkyl, alkenyl, aryl, arylalkyl, alkyloxy, alkylthio, alkenyloxy, alkenylthio, aryloxy, arylthio, amninoalkyl, aminoalkenyl, aminoaryl, aminoarylalkyl, hydroxyalkyl, hydroxyalkenyl, hydroxyaryl, and hydroxyarylalkyl;
and m is an integer of from 1 to 3,
and wherein, optionally, any two of R.sup.11, R.sup.12 and R.sup.13 are combined to form a ring structure;
and dimers formed by the covalent attachment of two compounds of formula (II) in which w is 1, through a linking group having from 1 to 6 carbon atoms;
and physiological salts thereof, with the proviso that the molecular weight of said chelating agent does not exceed 2000;
and
(B) a pharmaceutically acceptable carrier.

17 more elements

Compounds with chelation affinity and selectivity for first transition series elements: use in medical therapy

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Compounds with chelation affinity and selectivity for first transition series elements: use in medical therapy

Life of this patent

Abstract

Claims21