Construction of 2-Substituted-3-Functionalized Benzofurans via Intramolecular Heck Coupling: Application to Enantioselective Total Synthesis of Daphnodorin B
A novel approach was developed for the synthesis of 2-substituted-3-functionalized benzofurans, using an intramolecular Heckreaction which was further applied in the first enantioselectivetotalsynthesis of Daphnodorin B.
An efficient and operationally simple procedure using Pd/BaSO4-catalyzed cross coupling of acyl chlorides with in situ generated alkynylzinc derivatives was developed, giving the corresponding ynones at yields of 50%–96%.
A mild and operationally simple procedure by Pd-catalyzed cross-coupling of acyl chlorides with in situ-generated alkynylzinc derivatives was developed, giving the corresponding ynones in good yields. Supplementary materials are available for this article. Go to the publisher's online edition of Synthetic Communications (R) full experimental and spectral details.
C–C Bond Activation of Cyclopropanes Enabled by Phosphine-Catalyzed <i>In Situ</i> Formation of High-Strain Methylenecycopropane Intermediate
作者:Kui Liu、Gang Wang、Zhe-Wen Zhang、Yu-Yang Shi、Zhi-Shi Ye