Highly asymmetric synthesis of (+)-corsifuran A. Elucidation of the electronic requirements in the Ruthenium-NHC catalyzed hydrogenation of benzofurans
A short and efficient synthesis of ent-corsifuran A by a highly asymmetric hydrogenation of a benzofuran precursor is reported. In addition, the electronic influence of the substituents on the asymmetric hydrogenation 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 conditions for achieving full conversion to the 2,3-dihydrobenzofuran.
Ortega, Nuria,Beiring, Bernhard,Urban, Slawomir,Glorius, Frank
supporting information; experimental part
p. 5185 - 5192
(2012/07/31)
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