53059-73-7Relevant articles and documents
Silica-acetylacetone-supported palladium nanoparticles as an efficient and reusable catalyst in the Heck-Mizoroki C-C cross-coupling reaction
Hajipour, Abdolreza,Shirdashtzade, Zohre,Azizi, Ghobad
, p. 143 - 146 (2015/03/30)
The preparation of palladium nanoparticles supported on acetylacetone-modified silica gel and their catalytic application for Heck olefination of aryl halides were investigated. The catalyst was characterized using X-ray diffraction, X-ray photoelectron spectroscopy, and transmission and scanning electron microscopies. The supported palladium nanoparticles are demonstrated to be a highly active and reusable catalyst for the Heck reaction. Several reaction parameters, including type and amount of solvent and base, were evaluated. The heterogeneity of the catalytic system was investigated with results indicating that there is a slight palladium leaching into the reaction solution under the applied reaction conditions. Despite this metal leaching, the catalyst can be reused nine times without significant loss of catalytic activity.
Breaking the ring through a room temperature catalytic wittig reaction
O'Brien, Christopher J.,Lavigne, Florie,Coyle, Emma E.,Holohan, Andrew J.,Doonan, Bryan J.
supporting information, p. 5854 - 5858 (2013/06/27)
One ring no longer rules them all: Employment of 2.5-10 mol % of 4-nitrobenzoic acid with phenylsilane led to the development of a room temperature catalytic Wittig reaction (see scheme). Moreover, these enhanced reduction conditions also facilitated the use of acyclic phosphine oxides as catalysts for the first time. A series of alkenes were produced in moderate to high yield and selectivity. Copyright
Triphenylphosphite and ionic liquids: Positive effects in the Heck cross-coupling reaction
Cárdenas, Juan C.,Fadini, Luca,Sierra, Cesar A.
experimental part, p. 6867 - 6870 (2011/03/18)
Configurationally pure trans and high molecular weights are important for the optoelectronic properties of poly(p-phenylenevinylene) derivatives. As a promising approach for obtaining PPVs with these characteristics it was asserted that a simple and inexpensive monodentate phosphite, such as triphenylphosphite, is a good and efficient ligand for the Heck cross-coupling reaction. The catalyst activity is improved by the use of room temperature ionic liquids, obtaining quantitative yields and TONs up to 33,000.
