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- W2950147244 abstract "Vinylpropargyl tungsten complexes were prepared to comprise a tethered unsaturated ester designed for intramolecular Diels-Alder reaction. Treatment of these vinylpropargyl tungsten complexes with aldehydes and imines in the presences of BF3·OEt2 resulted in a [3+2] cycloaddition to give 2,5-dihydrofuran and pyrrole derivatives. Hydrodemetalation of these tungsten heterocyclic compounds was achieved with Me3NO in CH3CN and the resulting furyl and dihydropyrrolyl dienes undergo highly diastereoselective intramolecular Diels-Alder reaction to give tricyclic furan and pyrrolyl derivatives efficiently. This method provides a short stereoselective synthesis of tricyclic furan and pyrrole derivatives." @default.
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- W2950147244 date "2002-01-01" @default.
- W2950147244 modified "2023-10-18" @default.
- W2950147244 title "Stereocontrolled Construction of Tricyclic Furan and Pyrrolyl Derivatives via Tungsten-Mediated [3+2] Cycloaddition and Intramolecular Diels-Alder Reaction" @default.
- W2950147244 doi "https://doi.org/10.1055/s-2002-35230" @default.
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