A concise enantioselective total synthesis of rhizoxin D
作者:Ian S. Mitchell、Gerald Pattenden、Jeffrey P. Stonehouse
DOI:10.1016/s0040-4039(01)02154-2
日期:2002.1
A new and convergent synthesis of the antitumour macrolide rhizoxin D 2 is described. The synthesis features a Wadsworth–Emmons olefination and a facile intramolecular Stille reaction to elaborate the 16-membered macrocyclic core 5 from the vinyl iodide 3 and the vinyl stannane 4 as key steps.
A total synthesis of the antitumour macrolide rhizoxin D
作者:Ian S. Mitchell、Gerald Pattenden、Jeffrey Stonehouse
DOI:10.1039/b507570j
日期:——
An enantioselective synthesis of rhizoxin D (2), isolated from the plant pathogenic fungus Rhizopus chinensis, is described. The overall strategy is based on elaboration of the δ-lactone-substituted vinyl stannane 7 and the phosphonate-substituted vinyl iodide 9, followed by their coupling to the core 16-membered macrolide 6via a sequential intermolecular Horner–Wadsworth–Emmons olefination, leading to 50, and by an intramolecular Stille reaction. The triene oxazole-containing side chain in rhizoxin D is then introduced using the phosphine oxide 8 in an E-selective Horner–Wittig reaction with the macrolide aldehyde 51b.