title: Hemi-synthesis and biological activity of new analogues of podophyllotoxin.
abstract: Various 4-analogues of podophyllotoxin and epipodophyllotoxin were obtained via the formation of the corresponding 4-keto derivatives. Methyloximation of podophyllotoxone, followed by subsequent catalytic hydrogenation, gave stereoselective access to 4-alpha-amino-4-deoxypodophyllotoxin and from there, to the corresponding acetamido and formamido derivatives. Base-catalyzed isomerisation of 4-alpha-amino-4-deoxypodophyllotoxin led to the corresponding picropodophyllin isomer while the 4-beta-amino afforded a neopodophyllotoxin-like derivative. On the other hand, oxirane and hydroxymethyl-containing analogues were prepared from podophyllotoxin and 4-epi-4'-demethyl-podophyllotoxin, using a Takai olefination strategy. In the latter series, carboxaldehyde- and carboxylic acid-containing derivatives were also synthesized.
authors.affiliation: Laboratoire de Pharmacochimie, UMR 176 CNRS-IC, Section Recherche de l'Institut Curie, 26 rue d'Ulm, Paris, France.
authors.forename: Emmanuel
authors.initials: E
authors.lastname: Roulland
authors.forename: Prokopios
authors.initials: P
authors.lastname: Magiatis
authors.forename: Paola
authors.initials: P
authors.lastname: Arimondo
authors.forename: Emmanuel
authors.initials: E
authors.lastname: Bertounesque
authors.forename: Claude
authors.initials: C
authors.lastname: Monneret
mesh_terms: D020533:Angiogenesis Inhibitors / Q000138:chemical synthesis / Q000494:pharmacology; D000818:Animals; D000972:Antineoplastic Agents, Phytogenic / Q000138:chemical synthesis* / Q000494:pharmacology*; D017209:Apoptosis / Q000187:drug effects; D002453:Cell Cycle / Q000187:drug effects; D004791:Enzyme Inhibitors / Q000138:chemical synthesis / Q000494:pharmacology; D006801:Humans; D007939:Leukemia L1210 / Q000188:drug therapy; D009336:Necrosis; D011034:Podophyllotoxin / Q000031:analogs & derivatives* / Q000138:chemical synthesis* / Q000494:pharmacology; D013237:Stereoisomerism; D013329:Structure-Activity Relationship; D013552:Swine; D059004:Topoisomerase I Inhibitors; D014404:Tubulin / Q000187:drug effects / Q000378:metabolism
chemical_list: D020533:Angiogenesis Inhibitors; D000972:Antineoplastic Agents, Phytogenic; D004791:Enzyme Inhibitors; D059004:Topoisomerase I Inhibitors; D014404:Tubulin; D011034:Podophyllotoxin