A convergent total synthesis of dictyostatin is described. Key features of the synthesis include the use of titanium-mediated cyclizations of (silyloxy)enynes for the synthesis of stereotriads, a subunit coupling by metathesis, and macrocyclization by intramolecular Horner-Wadsworth-Emmons olefination.
Total synthesis of (−)-dictyostatin, a microtubule-stabilising anticancer macrolide of marine sponge origin
作者:Ian Paterson、Robert Britton、Oscar Delgado、Nicola M. Gardner、Arndt Meyer、Guy J. Naylor、Karine G. Poullennec
DOI:10.1016/j.tet.2010.01.083
日期:2010.8
An efficient convergent synthesis of the anticancer marinemacrolide (−)-dictyostatin is described that proceeds in 4.6% yield over 27 steps. Most of the stereocentres were configured using substrate control, making use of a common building block to install the C12–C14 and C20–C22 stereotriads, with a lactate boron aldol reaction employed to construct a C4–C10 β-ketophosphonate as utilised in the pivotal
[EN] METHODS FOR THE SYNTHESIS OF DICTYOSTATIN AND DERIVATIVES AND ANALOGUES THEREOF, STEREOCHEMICAL CHARACTERISATION, NOVEL DICTYOSTATIN COMPOUNDS AND USES THEREOF AND SYNTHETIC INTERMEDIATES<br/>[FR] PROCEDES DE SYNTHESE DE DICTYOSTATINE ET DE DERIVES ET D'ANALOGUES DE CELLE-CI, CARACTERISATION STEREOCHIMIQUE, NOUVEAUX COMPOSES DE DICTYOSTATINE ET UTILISATIONS DE CEUX-CI ET INTERMEDIAIRES SYNTHETIQUES