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International audienceA new strategy from simple cyclic β-ketoesters or amides involving a selective three-component reaction and a ring closing metathesis or a palladium catalyzed carbocyclization in a sequential fashion to access spiro-heterocycles is reported. This expedient two-step sequence generates compounds of significant molecular complexity and high synthetic and biological relevance from simple and readily available starting materials

synlett

Synthesis of Functionalized Spiroheterocycles by Sequential Multicomponent Reaction/Metal-Catalyzed Carbocylizations from Simple β-Ketoesters and Amides