FIELD: synthesis of glycosides. SUBSTANCE: 4-substituted anthracyclinones of formula: $$$ wherein R is H, alkyl, alkenyl, alkynyl containing not more than 10 carbon atoms. Reagent 1: 4-dimethoxy-4-sulfonyl-13- dioxolanyldaunomycinones. Reagent 2: carbon oxide. Reaction conditions: R is R-OH nucleophil, organic or inorganic base, catalyst of formula: $$$ wherein M is transition metal atom, $$$ in anion or neutral molecule, n and m are from 0 to 4. EFFECT: more efficient preparation process. 4 cl, 1 dwg
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