[Pd(IPr*<sup>OMe</sup>)(cin)Cl] (cin = Cinnamyl): A Versatile Catalyst for C–N and C–C Bond Formation
作者:Gulluzar Bastug、Steven P. Nolan
DOI:10.1021/om500026s
日期:2014.3.10
Buchwald–Hartwig cross-coupling reactions of stericallydemanding aryl chlorides with sterically hindered and deactivated aniline derivatives. This catalyst also proved efficient in Suzuki–Miyaura reactions, thus allowing the preparation of tetra-ortho-substitutedbiaryls. The Kumada–Corriu coupling has also been investigated using this palladium N-heterocyclic carbene (NHC) catalyst.
[Pd(IPr*)(acac)Cl]: An Easily Synthesized, Bulky Precatalyst for C–N Bond Formation
作者:Sebastien Meiries、Anthony Chartoire、Alexandra M. Z. Slawin、Steven P. Nolan
DOI:10.1021/om300205c
日期:2012.4.23
synthesis of [Pd(IPr*)(acac)Cl] has been developed from commercially available Pd(acac)2 and the easily prepared IPr*·HCl (acac = acetylacetonate; IPr* = N,N′-bis(2,6-bis(diphenylmethyl)-4-methylphenyl)imidazol-2-ylidene). The reactivity of the resulting complex [Pd(IPr*)(acac)Cl] (1) as a highly active PdII precatalyst for the Buchwald–Hartwig arylamination coupling has been explored. A wide range of substrates
[Pd(IPr*<sup>OMe</sup>)(acac)Cl]: Tuning the N-Heterocyclic Carbene in Catalytic C–N Bond Formation
作者:Sebastien Meiries、Klaus Speck、David B. Cordes、Alexandra M. Z. Slawin、Steven P. Nolan
DOI:10.1021/om3011867
日期:2013.1.14
A new N-heterocyclic ligand IPr*(OMe) [N,N'-bis(2,6-bis(diphenylmethyl)-4-methoxyphenyl)imidazol-2-ylidene] has been synthesized and compared with its earlier methyl-substituted congener IPr* [N,N'-bis(2,6-bis(diphenylmethyl)-4-methylphenyl)imidazol-2-ylidene]. IPr*(OMe) was successfully bound to palladium, and the catalytic activity of the resulting complex [Pd(IPr*(OMe))(acac)Cl] was investigated in Buchwald-Hartwig arylamination. Catalytic activity was compared to that of [Pd(IPr*)(acac)Cl].
Pd-PEPPSI-IPent<sup>An</sup> Promoted Deactivated Amination of Aryl Chlorides with Amines under Aerobic Conditions
作者:Fei-Dong Huang、Chang Xu、Dong-Dong Lu、Dong-Sheng Shen、Tian Li、Feng-Shou Liu
DOI:10.1021/acs.joc.8b01205
日期:2018.8.17
We report herein a highly efficient Pd-catalyzed amination by “bulky-yet-flexible” Pd-PEPPSI-IPentAn complexes. The relationship between the N-heterocyclic carbenes (NHCs) structure and catalytic properties was discussed. Sterically hindered (hetero)arylchlorides and a variety of aliphatic and aromatic amines can be applied in this cross-coupling, which smoothly proceeded to provide desired products
我们在此报告了一种由“大体积但还灵活”的Pd-PEPPSI-IPent An复合物进行的高效Pd催化胺化反应。讨论了N-杂环卡宾(NHCs)结构与催化性能之间的关系。可以在该交叉偶联中应用立体受阻的(杂)芳基氯化物以及各种脂肪族和芳香族胺,它们可以顺利进行以提供所需的产物。操作简单的协议强调了在不排除空气和水分的情况下,在温和条件下可快速获得C Ar -N键的形成。