title: [Derivatives of antineoplastic antibiotics of the daunorubicin series containing methylurea or nitrosomethylurea residues].
abstract: Derivatives of antitumour anthracycline antibiotics containing N-methylurea moiety in the carbohydrate ring were obtained by the interaction of methyl isocyanate with daunorubicin, doxorubicin, carminomycin and daunorubicin derivatives, substituted at C-13 or C-14 positions. N-Nitrosation of these compounds yielded modified anthracycline antibiotics containing the N-methyl-N-nitrosourea substituent at C-3' position. Alkaline degradation of these derivatives produced, through corresponding isocyanates cyclic 3'-N,4'-carbonylderivatives. In these anthracycline derivatives with sugar cycles conjugated with oxazoline-2-ones the predominant conformations of sugar ring has changed from 1C4 to 4C1, 2,5B, or B0,3 (shown by 1H NMR spectroscopy). It was demonstrated, both in vitro and in vivo, that introduction of methylurea or cytotoxic methylnitrosourea moieties does not potentiate antimicrobial, cytotoxic or antitumour properties of these compounds.
authors.forename: L S
authors.initials: LS
authors.lastname: Povarov
authors.forename: E V
authors.initials: EV
authors.lastname: Bakina
authors.forename: E I
authors.initials: EI
authors.lastname: Lazhko
authors.forename: G I
authors.initials: GI
authors.lastname: Orlova
authors.forename: O S
authors.initials: OS
authors.lastname: Zhukova
authors.forename: N A
authors.initials: NA
authors.lastname: Obidniak
authors.forename: G I
authors.initials: GI
authors.lastname: Iurchenko
authors.forename: T Iu
authors.initials: TIu
authors.lastname: Glazkova
authors.forename: M N
authors.initials: MN
authors.lastname: Preobrazhenskaia
mesh_terms: D000818:Animals; D000903:Antibiotics, Antineoplastic / Q000138:chemical synthesis*; D002455:Cell Division / Q000187:drug effects; D055598:Chemical Phenomena; D002621:Chemistry; D003630:Daunorubicin / Q000138:chemical synthesis* / Q000494:pharmacology; D007941:Leukemia P388 / Q000188:drug therapy*; D007942:Leukemia, Experimental / Q000188:drug therapy*; D008297:Male; D008770:Methylnitrosourea / Q000138:chemical synthesis*; D008782:Methylurea Compounds / Q000138:chemical synthesis*; D051379:Mice; D013329:Structure-Activity Relationship
chemical_list: D000903:Antibiotics, Antineoplastic; D008782:Methylurea Compounds; D008770:Methylnitrosourea; C002352:methylurea; D003630:Daunorubicin
vernacular_title: Proizvodnye protivoopukholevykh antibiotikov riada daunorubitsina, soderzhashchie ostatok metilmocheviny ili nitrozometilmocheviny.