First Enantioselective Total Synthesis of the Reported Structure of (R)-(+)-Orizaterpenyl Benzoate Using an Asymmetric Allylation of a Prochiral Ketone in a Domino Process
作者:Lutz Tietze、Simon Biller、Thomas Wolfram
DOI:10.1055/s-0030-1258537
日期:2010.9
An efficient synthesis of (R)-orizaterpenyl benzoate using a multicomponent domino allylation reaction of a prochiral ketone with allyltrimethyl silane and the enantiopure silyl ether of benzyl phenyl carbinol in the presence of catalytic amounts of TfOH is described.
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