Bis-diimidazolylidine complexes of nickel: Investigations into nickel catalyzed coupling reactions
作者:Tressia A. P. Paulose、Shih-Chang Wu、Jeremy A. Olson、Tony Chau、Nikki Theaker、Matt Hassler、J. Wilson Quail、Stephen R. Foley
DOI:10.1039/c1dt10858a
日期:——
bis(diimidazolylidine)nickel(II) complexes, ([(diNHC)2Ni]2+) 3a,b and their corresponding silver(I) 4a,b and palladium(II) 5a,b complexes were synthesized and characterized by NMR and single crystal X-ray analysis. The catalytic potential of complex 3a was assessed in Mizoroki–Heck and Suzuki–Miyaura coupling reactions. In the Suzuki–Miyaura coupling reaction, nickel precatalyst 3a was active for the coupling
合成了空气和湿气稳定的双(二咪唑基吡啶)镍(II)配合物([[(diNHC)2 Ni] 2+)3a,b及其相应的银(I)4a,b和钯(II)5a,b配合物并通过NMR和单晶X射线分析进行表征。在Mizoroki–Heck和Suzuki–Miyaura偶联反应中评估了复合物3a的催化潜能。在Suzuki-Miyaura偶联反应中,镍预催化剂3a对芳基氯化物和芳基氟化物的偶联具有活性。类似合成的Pd(II)配合物导致形成(diNHC)PdCl 2物种,该物种对芳基氟化物的偶联没有活性。对于Mizoroki-Heck反应,发现当使用Na 2 CO 3或NEt 3作为碱时,在没有镍或钯预催化剂的情况下,芳基碘化物可以被活化,而在Suzuki-Miyaura反应中芳基碘化物和芳基溴化物可以被活化。 K 3 PO 4为碱时,无催化剂。
作者:Tressia A.P. Paulose、Jeremy A. Olson、J. Wilson Quail、Stephen R. Foley
DOI:10.1016/j.jorganchem.2008.07.040
日期:2008.10
The synthesis and characterization of non-symmetric di-N-heterocyclic carbene (diNHC) silver(I) and palladium(II) complexes are described. The activity of the Pd(II) complexes in the Suzuki–Miyaura coupling reaction of bulky substrates was investigated. This synthetic route represents a possible general pathway into a wide variety of non-symmetrically substituted diNHC ligands.
The present invention relates to novel indole derivatives, processes for preparing them, pharmaceutical compositions containing them and their use as pharmaceuticals as modulators of sphingosine-1-phosphate receptors.
Using Slippage to Construct a Prototypical Molecular “Lock & Lock” Box
作者:Ting-Hsuan Chiang、Cheng-Yen Tsou、Yu-Hsuan Chang、Chien-Chen Lai、Richard P. Cheng、Sheng-Hsien Chiu
DOI:10.1021/acs.orglett.1c01945
日期:2021.8.6
and di(ethylene glycol)-containing macrocycles and their use as linking units for the construction of a prototypical molecular “Lock & Lock” box from a resorcinarene-based cavitand “bowl” and a porphyrin “cover”. The multivalent structure with four slippage linkers provided the molecular box with high stability, yet the system dissociated into its two components upon application of suitable external stimuli
The invention provides biaryl meta-pyrimidine compounds having the general structure (A). The pyrimidine compounds of the invention are capable of inhibiting kinases, such as members of the Jak kinase family, and various other specific receptor and non-receptor kinases.