| abstract |
A process for preparing 4-O-alkyl-rhodomycins of the formula I <IMAGE> in which R<1> is H, C1-C4-alkyl or an acyl protective group, R<2> is OH, COOCH3, O-Si(C1-C4-alkyl)3 or an O-acyl protective group, where acyl is acetyl, mono-, di- or trihalogenoacetyl with fluorine or chorine as halogen, benzoyl or p-nitrobenzoyl, R<3> is C1-C4-alkyl, R<4> is H or R<4> and R<5> together are a tetraisopropyldisiloxane-1,3-diyl protective group, R<5> is H or a glycosyl radical of the formula II <IMAGE> in which R<6> is OH, acetyloxy, NHCOCF3, NH2, a mono- or di-C1-C4-alkyl amino group or a 4-morpholinyl group, R<7> is H, OH, an acetyloxy, trifluoroacetyloxy or p-nitrobenzoyloxy group, and the use thereof for preparing 7-O-glucosyl-rhodomycins which, by reason of their cytostatic activity, are suitable for the treatment of cancers, are described. |