A variety of palladacycles are shown to catalyze Heck alkenylations with similar efficiencies. The new oxapalladacycle 1 was shown to insert and transmetalate under mild conditions with n-butyl acrylate and vinyltributylstannane, respectively. This palladacycle acts as an active (pre)catalyst for cross-coupling and Heckreactions.
A Mizoroki–Heck-type reaction of telluronium iodides with olefins proceeded under mild conditions to produce substituted olefins in high yields. The reaction required a catalytic amount of palladium(II) species and a stoichiometric amount of silver(I) acetate as an additive.
Maghemite decorated with ultra-small palladium nanoparticles (γ-Fe<sub>2</sub>O<sub>3</sub>–Pd): applications in the Heck–Mizoroki olefination, Suzuki reaction and allylic oxidation of alkenes
作者:Anuj K. Rathi、Manoj B. Gawande、Jiri Pechousek、Jiri Tucek、Claudia Aparicio、Martin Petr、Ondrej Tomanec、Radka Krikavova、Zdenek Travnicek、Rajender S. Varma、Radek Zboril
DOI:10.1039/c5gc02264a
日期:——
γ-Fe2O3–Pd NPs for Heck, Suzuki and allylic oxidation reaction under milder conditions.
Bipyridine-Modulated Palladium-Catalyzed Oxidative Heck-Type Reactions of Arylboronic Acids with Olefins
作者:Chien-Ming Hsu、Chih-Bin Li、Chia-Hsing Sun
DOI:10.1002/jccs.200900129
日期:2009.10
We have demonstrated that 4,4′‐dimethyl 2,2′‐bipyridine as ligand for Pd(II) catalysts was very efficient for oxidativeHeck‐type coupling reaction of arylboronicacids with olefins in DMA or CH3CN under atm air at 80 °C. The presence of chelated bipyridine ligand isindispensable to achieve high reaction yields and to suppress the formation of biphenyl as homocoupled byproduct.
Aerobic Oxidative Coupling of Arenes and Olefins through a Biomimetic Approach
作者:Beneesh P. Babu、Xu Meng、Jan-E. Bäckvall
DOI:10.1002/chem.201300100
日期:2013.3.25
Arenes and electron‐deficient olefins can be oxidatively coupled through a biomimetic Pd(OAc)2‐catalyzed transformation. CH activation of the arene partner is effected under reaction conditions of low catalyst loading, normal oxygen pressure, and using p‐benzoquinone and iron phthalocyanine as electron‐transfer mediators (ETMs). By controlling catalyst loading, the reaction can be made selective for