title: New ursolic and betulinic derivatives as potential cytotoxic agents.
abstract: Fifteen new ursolic and betulinic triterpenoids, bearing various functionalities at C-3 and C-28 were synthesized as potential cytotoxic agents. All compounds were obtained by a hemisynthetic route via ursolic and betulinic acids. Preliminary screening of these compounds on human HT 29 colon cancer cells revealed inhibitory activity for three of them. Beta-D-Glucopyranosyl-3beta-hydroxyurs-12(13)-en-28-oate 1c, 3beta-3-(3-pyridyl)-prop-2-enoyloxyurs-12(13)-en-28-oic acid 1i and the potassium salt of 3beta-cinnamoyloxylup-20(29)-en-28-oic acid 2d demonstrated cytotoxic activity in the micromolar range: 8.0, 45.0 and 8.0 microM, respectively.
authors.affiliation: Université de Bourgogne, Faculté de Pharmacie, Unité de Molecules d'Intérêt Biologique, JE 2244, BP 87900, 21079 Dijon Cedex, France. ibaglin@u-bourgogne.fr
authors.forename: I
authors.initials: I
authors.lastname: Baglin
authors.forename: A
authors.initials: A
authors.lastname: Poumaroux
authors.forename: M
authors.initials: M
authors.lastname: Nour
authors.forename: K
authors.initials: K
authors.lastname: Tan
authors.forename: A C
authors.initials: AC
authors.lastname: Mitaine-Offer
authors.forename: M A
authors.initials: MA
authors.lastname: Lacaille-Dubois
authors.forename: B
authors.initials: B
authors.lastname: Chauffert
authors.forename: C
authors.initials: C
authors.lastname: Cavé
mesh_terms: D000970:Antineoplastic Agents / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D002470:Cell Survival / Q000187:drug effects; D004354:Drug Screening Assays, Antitumor; D019073:HT29 Cells; D006801:Humans; D020128:Inhibitory Concentration 50; D015394:Molecular Structure; D053978:Pentacyclic Triterpenes; D013329:Structure-Activity Relationship; D014315:Triterpenes / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D000094062:Betulinic Acid; D000097245:Ursolic Acid
chemical_list: D000970:Antineoplastic Agents; D053978:Pentacyclic Triterpenes; D014315:Triterpenes; D000094062:Betulinic Acid; D000097245:Ursolic Acid