Selective dimerization of terminal acetylenes in the presence of PEPPSI precatalysts and relative chloro- and hydroxo-bridged N-heterocyclic carbene palladium dimers

Add time:08/05/2019    Source:sciencedirect.com

Highly regio- and stereoselective dimerization of terminal acetylenes occurs in the presence of [PdCl2(IPr)(3-chloropyridine)], other members of the family of PEPPSI precatalysts and the structurally related N-heterocyclic carbene palladium dimers, i.e. [{Pd(μ–Cl)Cl(IPr)}2] and [{Pd(μ–OH)Cl(IPr)}2] (IPr = 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene). The reaction leads to exclusive formation of E-isomer of head to head dimerization product. [{Pd(μ–OH)Cl(IPr)}2] catalyzes dimerization of a broad spectrum of aryl- and silylacetylenes at room temperature and is able to act in base-free conditions.

We also recommend Trading Suppliers and Manufacturers of Palladium hydroxide (cas 12135-22-7). Pls Click Website Link as below: cas 12135-22-7 suppliers

Prev:Colorimetric determination of hydrazine and nitrite using catalytic effect of palladium nanoparticles on the reduction reaction of methylene blue
Next:Isotopic shift of the protonic heterojunction potential in novel palladium-hydroxide-proton-conductor heterostructures)