Synthetic access to isoxazoline-functionalized isoquinolines via microwave-assisted iminoxyl radical-participated cascade cyclization of vinyl isocyanides
2018
A convenient microwave-assisted method for the synthesis of isoxazoline-functionalized isoquinolines via the n-Bu4NI (TBAI) catalyzed radical cascade cyclization of vinyl isocyanides with β,γ-unsaturated ketoximes has been described. The methodology presented here achieves a wide substrate scope and good to excellent yields. A radical mechanism is proposed, which is supported by the intermolecular competing kinetic isotope effect (KIE) experiment and the radical trapping experiment.
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