Superacid-Promoted Reactions of a-Keto amides and Related Systems.

[摘要]：The superacid-promoted reactions of a-hydroxy and a-keto amides was studied. Ionization of these compds. leads to varied aryl-substituted oxyindole products. In some cases, electrocyclization can lead to substituted fluorene products. Dicationic, superelectrophilic intermediates are proposed as intermediates leading to the products from a-hydroxy and a-keto amides.

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