title: Synthesis and biological assessment of simplified analogues of the potent microtubule stabilizer (+)-discodermolide.
abstract: An efficient, convergent and stereocontrolled synthesis of simplified analogues of the potent antimitotic agent (+)-discodermolide has been achieved and several small libraries have been prepared. In all the libraries, the discodermolide methyl groups at C14 and C16 and the C7 hydroxy group were removed and the lactone was replaced by simple esters. Other modifications introduced in each series of analogues were related to C11, C17 and C19 of the natural product. Key elements of the synthetic strategy included (a) elaboration of the main subunits from a common intermediate and (b) fragment couplings using Wittig reactions to install the (Z)-olefins. Library components were analyzed for microtubule-stabilizing actions in vitro, for displacement of [3H]paclitaxel from its binding site on tubulin, for antiproliferative activity against human carcinoma cells, and for cell signaling and mitotic spindle alterations by a multiparameter fluorescence cell-based screening technique. The results show that even significant structural simplification can lead to analogues with actions related to microtubule targeting.
authors.affiliation: Department of Chemistry, Chevron Science Center, 219 Parkman Avenue, Pittsburgh, PA 15260, USA.
authors.forename: José M
authors.initials: JM
authors.lastname: Mínguez
authors.forename: Sun-Young
authors.initials: SY
authors.lastname: Kim
authors.forename: Kenneth A
authors.initials: KA
authors.lastname: Giuliano
authors.forename: Raghavan
authors.initials: R
authors.lastname: Balachandran
authors.forename: Charitha
authors.initials: C
authors.lastname: Madiraju
authors.forename: Billy W
authors.initials: BW
authors.lastname: Day
authors.forename: Dennis P
authors.initials: DP
authors.lastname: Curran
mesh_terms: D000473:Alkanes / Q000737:chemistry* / Q000494:pharmacology*; D002219:Carbamates / Q000737:chemistry* / Q000494:pharmacology*; D045744:Cell Line, Tumor; D006801:Humans; D007783:Lactones / Q000737:chemistry* / Q000494:pharmacology*; D008870:Microtubules / Q000187:drug effects* / Q000502:physiology; D011753:Pyrones
chemical_list: D000473:Alkanes; D002219:Carbamates; D007783:Lactones; D011753:Pyrones; C071229:discodermolide