title: Copper- and ligand-free Sonogashira reaction catalyzed by Pd(0) nanoparticles at ambient conditions under ultrasound irradiation.
abstract: The Sonogashira reaction proceeds at ambient temperature (30 degrees C) in acetone or room-temperature ionic liquid, 1,3-di-n-butylimidazolium tetrafluoroborate ([bbim]BF4), as solvent under ultrasound irradiation to give enhanced reaction rates, excellent chemoselectivity, and high yields in the absence of a copper cocatalyst and a phosphine ligand. TEM analysis showed the formation of stable, crystalline, and polydispersed Pd(0) nanoparticles as catalyst for the reaction.
authors.affiliation: Organic Chemistry,Technology Division, National Chemical Laboratory, Dr. Homi Bhabha Road, Pune-411 008, India.
authors.forename: Atul R
authors.initials: AR
authors.lastname: Gholap
authors.forename: K
authors.initials: K
authors.lastname: Venkatesan
authors.forename: Renu
authors.initials: R
authors.lastname: Pasricha
authors.forename: Thomas
authors.initials: T
authors.lastname: Daniel
authors.forename: Rajgopal J
authors.initials: RJ
authors.lastname: Lahoti
authors.forename: Kumar V
authors.initials: KV
authors.lastname: Srinivasan