Methanol aided synthesis of PdNPs decorated on montmorillonite K 10 and its implication in Suzuki Miyaura type cross coupling reaction under base free condition

• Published in: Applied organometallic chemistry 2018-03, Vol.32 (3), p.n/a
• Main Authors: Mahanta, Abhijit, Raul, Prasanta Kumar, Saikia, Sanjib, Bora, Utpal, Thakur, Ashim Jyoti
• Format: Article
• Language: English
• Subjects: Aromatic compounds; Catalysis; Catalysts; Chemical industry; Chemical synthesis; Chemistry; Coupling; Cross coupling; Methanol; Montmorillonite; palladium NPs; Reaction time; room temperature
• ISSN: 0268-2605; 1099-0739
• DOI: 10.1002/aoc.4192

An efficient catalyst PdNPs decorated on Montmorillonite K 10 is prepared by simply stirring Pd(OAc)2 in methanol at room temperature without using any external reducing agent. The catalyst shows excellent activity for Suzuki Miyaura type cross coupling reaction between aryl diazonium salt and arylboronic acid under ligand and base free reaction conditions within short reaction time. The main advantage of this methodology is the easy synthesis of heterogeneous PdNPs @ Mont K 10 catalyst in a mild condition without using any reducing agent or additive and the catalyst is very efficient for biaryl synthesis. The catalyst is well characterized by SEM, EDX, TEM, BET, Powder XRD, TGA, DSC etc. The reaction pathway is greener with aqueous reaction medium, base free reaction condition, room temperature and reusable heterogeneous catalyst. The work describes an efficient method for Suzuki‐Miyaura type cross coupling reaction between aryl diazonium salt and arylboronic acid catalyzed by a prepared catalyst Pd@K 10. The catalyst is prepared by simply stirring Pd(OAc)2/Mont K 10 in methanol at room temperature without using any reducing agent. The catalyst is found to be reusable and it is characterized by different characterization techniques.