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1. A General Approach to Spirocyclic Piperidines via Castagnoli-Cushman Chemistry
2. Three-Component Castagnoli-Cushman Reaction of 3-Arylglutaconic Acid Anhydrides, Carbonyl Compounds, and Ammonium Acetate: a Quick and Flexible Way to Assemble Polysubstituted NH-δ-lactams
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