126541-80-8Relevant articles and documents
Demethyl(trifluoromethyl)actinomycins
Giencke, Astrid,Lackner, Helmut
, p. 569 - 579 (2007/10/02)
The synthesis of new 4-(trifluoromethyl)benzoic acid derivatives 2-10 and their coupling with amino acids and peptides 12, 13, 15 is described.They serve as precursors for the synthesis of the hitherto unknown demethyl(trifluoromethyl)actinocin dimethyl esters 11, demethyl-trifluoromethyl-actinocinyl peptides 14, 16, 18 and the demethyl-trifluoromethyl-actinomycins 17.Although spacially comparable with the methyl residues, the 4- and 6-trifluoromethyl groups have unexpected strong influences on the antibiotic and cytostatic properties of the actinomycins.The CH3/CF3 exchange makes it possible to bring NMR-analytically useful hetero nuclei into the centre of the actinomycin/DNA complex (Figure 1).