Construction of Nine‐Membered Heterocycles through Palladium‐Catalyzed Formal [5 4] Cycloaddition

Construction of Nine‐Membered Heterocycles through Palladium‐Catalyzed Formal [5 4] Cycloaddition: The first catalytic formal [5+4] cycloaddition to prepare nine‐membered heterocycles is presented. Under palladium catalysis, the reaction of N‐tosyl azadienes and substituted vinylethylene carbonates...

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