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  • Title: Pd-catalyzed C-S activation for [3 + 3] annulation of 2-(methylthio)benzofuran-3-carboxylates and 2-hydroxyphenylboronic acids: synthesis of coumestan derivatives.
    Author: Liu J, Liu Y, Du W, Dong Y, Liu J, Wang M.
    Journal: J Org Chem; 2013 Jul 19; 78(14):7293-7. PubMed ID: 23772852.
    Abstract:
    Pd-catalytic C-S activation was successfully applied to initiate the cross-coupling of (2-methylthio-3-ester)benzofurans with 2-hydroxyphenylboronic acids and sequential intramolecular transesterification process under Liebeskind-Srogl conditions. Thus, a novel [3 + 3] annulation strategy for efficient synthesis of coumestan derivatives has been developed from readily available starting materials.
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