Synthesis of Spirocarbamate Oxindoles via Intramolecular Trapping of a β‑Silyl Carbocation by an N-Boc Group
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We report the Lewis acid catalyzed additions of allylsilanes to N-Boc-iminooxindoles and the formation of novel silicon-containing spirocarbamates via intramolecular trapping of a β-silyl carbocation by an N-Boc group. Several transformations display the synthetic utility of these spirocarbamate oxindoles, including a reductive cyclization to access new silylated furoindoline derivatives.
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2016-02-19
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