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Starting with resin-bound glutamic acid, an efficient synthesis of N-substituted pyrrolidinones is described, using the Ugi four-component reaction (U-4CR). The same methodology is employed to produce N-substituted pyrrolidinone tethered N-substituted piperidines.

Solid-Phase Synthesis of N-Substituted Pyrrolidinone-Tethered N-Substituted Piperidines via Ugi Reaction