C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
167/255, 260/433
C07C 259/06 (2006.01) A61K 31/16 (2006.01) C07F 7/10 (2006.01) C07F 15/03 (2006.01)
Patent
CA 1287358
Novel carbonic acid esters Abstract N- and/or O-acylates, derived from carbonic acid monoesters, of desferrioxamine B of the formula Image (I) the symbols having the following meanings: each of AA1, AA2 and AA3, independently of the others, is hydrogen, an acyl radical, referred to as Ac, of a carbonic 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 AA1, AA2 and AA3 represents Cb, it may also be hydrogen or an amino- protecting group referred to as X, form strong iron(III) and aluminium 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 aluminium 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.
497985
Ciba-Geigy Investments Ltd.
Fetherstonhaugh & Co.
Peter Heinrich
LandOfFree
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