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Description:
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Novel carbonic acid esters
| Details |
Inventors: Peter, Heinrich;
Assignee: Ciba-Geigy Corporation (Ardsley, NY)
Primary Examiner: Phillips; Delbert R.
Assistant Examiner:
Attorney, Agent or Firm: Fishman; Irving M.
N- and/or O-acylates, derived from carbonic acid monoesters, of desferrioxamine B of the formula ##STR1## the symbols having the following meanings: each of AA.sup.1, AA.sup.2 and AA.sup.3, independently of the others, is hydrogen, an acyl radical, referred to as Ac, of a carboxylic acid having from 1 to 24 carbon atoms, or an esterified oxycarbonyl radical referred to as Cb (acyl radical of a carbonic acid monoester) having a total of from 2 to 25 carbon atoms, and B has one of the meanings of Cb or, if at least one of the symbols AA.sup.1, AA.sup.2 and AA.sup.3 represents Cb, it may also be hydrogen or an amino-protecting group referred to as X, form strong iron (III) and aluminum complexes within living cells and can therefore be used therapeutically for the treatment of warm-blooded animals, including humans, for pathological conditions associated with an excess of iron (III) or aluminum in the body or caused by iron (III)-dependent pathogenic organisms; they can also be used as intermediates for the manufacture of therapeutically effective derivatives of desferrioxamine B. The compounds according to the invention can be obtained by conventional acylation of the free amino group and/or hydroxy groups in desferrioxamine B or a suitable derivative thereof using a chloroformic ester or a similar reactive carbonic acid derivative. |
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DETAILED DESCRIPTION I claim: 1.
An acylate of desferrioxamine B of the formula ##STR5## wherein at least one of the radicals AA.
sup.
1, AA.
sup.
2, AA.
sup.
3 and B is tert.
-butyloxycarbonyl, allyloxycarbonyl, 2-(trimethylsilyl)-ethoxycarbonyl or a radical of the formula lower alkyl(--O--CH.
sub.
2 --CH.
sub.
2 --).
sub.
n O--CO-- wherein n represents 1 to 4, and each of the remaining radicals AA.
sup.
1, AA.
sup.
2, AA.
sup.
3 and B, independently of the others, represents alkanoyl having up to 20 carbon atoms, benzoyl or hydrogen, or a salt of said acylate having salt-forming properties.
2.
A compound according to claim 1 wherein at least one of the radicals AA.
sup.
1, AA.
sup.
2, AA.
sup.
3 and B is tert.
-butyloxycarbonyl, allyloxycarbonyl, 2-(trimethylsilyl)-ethoxycarbonyl or a radical of the formula lower alkyl(--O--CH.
sub.
2 --CH.
sub.
2 --).
sub.
n O--CO-- wherein n represents 1 to 4 and each of the remaining radicals AA.
sup.
1, AA.
sup.
2, AA.
sup.
3 and B, independently of the others, represents alkanoyl having up to 20 carbon atoms or benzoyl.
3.
A compound according to claim 1 wherein B is hydrogen and each of the radicals AA.
sup.
1, AA.
sup.
2 and AA.
sup.
3 is tert.
-butyloxycarbonyl, allyloxycarbonyl, 2-(trimethysilyl)-ethoxycarbonyl or a radical of the formula lower alkyl(--O--CH.
sub.
2 --CH.
sub.
2 --).
sub.
n O--CO-- wherein n represents 1 to 4, or a pharmaceutically acceptable acid addition salt thereof.
4.
A compound according to claim 1 wherein B is tert.
-butyloxycarbonyl, allyloxycarbonyl, 2-(trimethylsilyl)-ethoxycarbonyl or a radical of the formula lower alkyl(--O--CH.
sub.
2 --CH.
sub.
2 --).
sub.
n O--CH-- wherein n represents 1 to 4, and each of the radicals AA.
sup.
1, AA.
sup.
2 and AA.
sup.
3 represents hydrogen.
5.
A compound according to claim 1 wherein B is tert.
-butyloxycarbonyl and each of AA.
sup.
1, AA.
sup.
2 and AA.
sup.
3 is a radical of the formula lower alkyl(--O--CH.
sub.
2 --CH.
sub.
2 --).
sub.
n O--CO-- wherein n represents 1 to 4.
6.
A compound according to claim 1 wherein B is hydrogen and each of AA.
sup.
1, AA
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Molecular Biology 
