In Situ Recycling of E‐Waste Into Gold‐Loaded Cage Catalysts for Propargylamine Synthesis From Benzyl Alcohol

Recovering gold from e‐waste and giving it new properties not only facilitates the recycling of resources but also offers economic and environmental benefits. Herein, we report the use of a highly stable porous aromatic cage (T‐PAC) for the selective extraction of gold from e‐waste ( K d = 3.42 × 10 5 mL g −1 , with >99% removal). The gold‐loaded cage catalyst Au@PAC can catalyze the coupling of phenylboronic acid with high efficiency and 99% conversion. Notably, Au@PAC can catalyze the synthesis of propargylamine starting from benzyl alcohols rather than conventional aldehydes. A variety of propargylamines were successfully prepared in good yields (76%–84%) with water as the solvent. We show that T‐PAC’s unique binding sites and reaction microenvironment facilitate the in situ generation of Au 0 and the immobilization of Au III ; these two valence states of gold species jointly participate in and drive the reaction, enabling the one‐step conversion of alcohols to propargylamine. This study demonstrates a circular economy approach that integrates waste recovery, catalyst preparation, and green synthesis.