A Tandem Strategy: Wolff Rearrangement/Staudinger [2+2] Cycloaddition via Metal Carbenes for the Synthesis of Spiro[azetidine-3,3'-benzofuran]-2-ones.

The spiro[azetidine-3,3'-benzofuran]-2-one motif represents an important yet underexplored class of spirocyclic β-lactams, making the development of an efficient synthetic route to access this scaffold highly desirable. Herein, we report a concise ta…

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