Triple Mukaiyama-Michael Cascade toward a Tricyclic Framework

[摘要]：The intermolecular Mukaiyama-Michael addition between stoichiometric amounts of a bisketene acetal and methyl vinyl ketone is rapidly followed by a double cascade intramolecular Mukaiyama-Michael addition to form a fused tricyclic compound containing four-, five- and six-membered rings embellished with several functionalities.

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