An Unprecedented Valorisation of Marble Slurry Waste Material as Solid Support for Palladium‐Catalysed Heck and Suzuki Reactions

• Published in: ChemistrySelect (Weinheim) 2022-07, Vol.7 (27), p.n/a
• Main Authors: Chopra, Jaishri, Dayma, Varsha, Mandal, Astam, Baroliya, Prabhat K., Maiti, Debabrata
• Format: Article
• Language: English
• Subjects: Heck reaction; Heterogeneous catalysis; Marble slurry; Palladium Nanoparticles; Suzuki reaction
• ISSN: 2365-6549; 2365-6549
• DOI: 10.1002/slct.202200925

Marble slurry is a waste product from marble processing industries, which can facilitate cost‐effective, and environmentally sustainable catalyst support for metal catalyzed organic transformations, it can offer a waste‐to‐wealth concept. In this context, we developed a reusable MS supported ligand‐free palladium nanoparticles catalyst for Mizoroki‐Heck and Suzuki‐Miyaura coupling reactions. The prepared catalyst is found to be very efficient and facile with maximum TON 4.13×102 and TOF 102 h−1 with good to excellent yields in aerobic conditions. The catalyst was recuperated after each reaction and reused upto five catalytic cycles affording quite satisfactory stability. We use marble slurry waste material to develop a cheaper, recyclable and environmentally friendly solid supported palladium catalyst (Pd@MS). The Pd@MS efficiently catalysed the cross‐coupling reactions under aerobic and ligand‐free conditions with satisfactory stability. Impressively, the Pd@MS afforded wide range of the desired products of Mizoroki‐Heck and Suzuki‐Miyaura coupling reactions and recycled up to five cycles by simple filtration method.