Showing papers by "Dipankar Srimani published in 2009"
TL;DR: In this paper, a reduction of Pd(II) with a Fischer carbene complex where polyethylene glycol (PEG) was used as stabilizer is presented.
134 citations
TL;DR: In this paper, a reduction of Pd(II) with a Fischer carbene complex where polyethylene glycol (PEG) was used as stabilizer is presented.
Abstract: Catalytically active Pd nanoparticles have been synthesized in water by a novel reduction of Pd(II) with a Fischer carbene complex where polyethylene glycol (PEG) was used as stabilizer. PEG molecules wrap around the nanoparticles to impart stability and prevent agglomeration, yet leave enough surface area available on the nanoparticle for catalytic activity. Our method is superior to others in terms of rapid generation and stabilization of Pd nanoparticles in water with a cheap, readily available PEG stabilizer. The size of the nanoparticles generated can be controlled by the concentration of PEG in water medium. The size decreased with the increase in the PEG: Pd ratio. This aqueous nano-sized Pd is a highly efficient catalyst for Suzuki, Heck, Sonogashira, and Stille reaction. Water is used as the only solvent for the coupling reactions.
7 citations
TL;DR: Schiff bases derived from substituted benzaldehydes are effective ligands for palladium(0) in the Suzuki-Miyaura coupling of phenylboronic acid with aryl, benzyl and allyl bromides under mild conditions as mentioned in this paper.
Abstract: Schiff bases derived from substituted benzaldehydes are effective ligands for palladium(0) in the Suzuki–Miyaura coupling of phenylboronic acid with aryl, benzyl and allyl bromides under mild conditions.