II- from ecological recycling of Pd to greener sonogashira cross-coupling reactions

Based on a new process derived from biosorption technology that uses roots aquatic and wetland plants (Mentha aquatica, Eichhornia crassipes, Pistia stratiotes, Ludwigia peploides, Fallopia japonica), materials rich in lignin (pinecone, bark pine) wastes tannins (coffee grounds), we were able to prepare class of ecocatalyst, called Eco-Pd. The formed Eco-Pd are characterized via MP-AES XRDP the order elucidate chemical composition structure materials. Interestingly, presence higher-oxidation-state palladium species, namely K2PdCl6, is observed. We describe use this generation for green sustainable Sonogashira reaction. absence copper, ligands, additives, lower Pd loading (0.05 mol% - 0.1 mol%), solvents (glycerol/n-BuOH), biosourced base (Eco-Ca), significant advantages approach. combination TON/TOF (103/250 h−1) can be advantageously compared with literature demonstrates remarkable practical utility these catalysts. Most importantly, easily recycled by reused, another asset terms Chemistry.