Highly asymmetric synthesis of (+)-corsifuran A. Elucidation of the electronic requirements in the Ruthenium–NHC catalyzed hydrogenation of benzofurans
synthesis of ent-corsifuran A by a highlyasymmetrichydrogenation of a benzofuran precursor is reported. In addition, the electronic influence of the substituents on the asymmetrichydrogenation of benzofurans is provided. Whereas the hydrogenation of electron-deficient benzofurans was achieved under very mild conditions, the presence of electron-donating groups in the benzofuran required harsher reaction
Asymmetric Synthesis of Corsifuran A by an Enantioselective Oxazaborolidine Reduction
作者:Harry Adams、Nathan J. Gilmore、Simon Jones、Mark P. Muldowney、Stephan H. von Reuss、Ramesh Vemula
DOI:10.1021/ol800239q
日期:2008.4.1
Corsifuran A has been prepared in an enantiomerically pure form for the first time by an asymmetric reduction procedure, allowing confirmation of the absolute stereochemistry of the natural product as (R).