NEW CARBONIC ACID ESTERS

摘要

PCT No. PCT/CH85/00175 Sec. 371 Date Aug. 11, 1986 Sec. 102(e) Date Aug. 11, 1986 PCT Filed Dec. 13, 1985 PCT Pub. No. WO86/03747 PCT Pub. Date Jul. 3, 1986.N- and/or O-acylates, derived from carbonic acid monoesters, of desferrioxamine B of the formula (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 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 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 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.