Use of π-allyltricarbonyliron lactone complexes in the synthesis of taurospongin A: a potent inhibitor of DNA polymerase β and HIV reverse transcriptase
作者:Christopher J. Hollowood、Shigeo Yamanoi、Steven V. Ley
DOI:10.1039/b301676p
日期:——
The total synthesis of taurospongin A by two new approaches has been achieved where Ï-allyltricarbonyliron lactone complexes have been used to control highly stereoselective additions of the nucleophiles to a carbonyl unit located in the side chain of these complexes.
Twonew routes to the C(1−10) carboxylic acid core of taurospongin A are presented. In the first route, overall asymmetric hydration of a C(2)−C(3) alkene is achieved by Sharpless AD and selective deoxygenation at C(2); in the second route, the C(3) stereogeniccenter is set by Tietze asymmetric allylation. A short synthesis of the C(1′−25′) fatty acid combines with the product from the first route