Synthesis of a C<i><sup>n</sup></i>-C<i><sup>n</sup></i><sup>+6</sup>Building Block Common to Important Polyol,Polyene Antibiotics from a Divinylcarbinol by a Desymmetrizing Sharpless Epoxidation
作者:Luc Nachbauer、Reinhard Brückner
DOI:10.1002/ejoc.201300181
日期:2013.10
A stereocontrolled synthesis of the enantiomerically pure epoxide 7b from propargyl ether 15 has been realized in 15 steps. Epoxide 7b represents a building block for the “eastern” moieties of the title compounds. Key steps in our approach were a desymmetrizing Sharpless epoxidation ( anti,cis-16), the selective processing of the bis-enolate of the bis(tert-butyl alkoxyacetate) 11 through a diastereoselective