The formal total synthesis of the cytotoxic 14-membered macrolides, aspergillides A and B is described. A combination of a chiron approach and an asymmetric synthesis is adopted for the synthesis of the target macrolides. The required 2,6-syn and 2,6-anti tetrahydropyrans were constructed via a tandem Sharpless asymmetric epoxidation and 6-exo cyclization on δ-hydroxy allylic alcohols, as the key steps
Synthesis and Biological Properties of the Cytotoxic 14‐Membered Macrolides Aspergillide A and B
作者:Santiago Díaz‐Oltra、César A. Angulo‐Pachón、Juan Murga、Eva Falomir、Miguel Carda、J. Alberto Marco
DOI:10.1002/chem.201001682
日期:2011.1.10
Total, stereoselective syntheses of the naturally occurring, cytotoxicmacrolidesaspergillide A and B are described. Olefin metatheses and asymmetric allylations were key steps in the synthetic sequences. Cytotoxicity assays against several tumor cell lines have been performed for the two aspergillides and some of the intermediates or side products of the synthetic sequence. One of these intermediates