An efficient class of bis-NHC salts: applications in Pd-catalyzed reactions under mild reaction conditions
作者:Chien-Cheng Chiu、Hui-Tzu Chiu、Dong-Sheng Lee、Ta-Jung Lu
DOI:10.1039/c8ra04094j
日期:——
(bis-NHC) salts that can be easily made from commercially available and inexpensive starting materials. The application of these salts to Pd-catalyzed reactions is described. The palladium (Pd) catalyst generated in situ was highly effective undermild reaction conditions.
Synthesis, structural characterization of benzimidazole-functionalized Ni(II) and Hg(II) N-heterocyclic carbene complexes and their applications as efficient catalysts for Friedel–Crafts alkylations
作者:Guoli Huang、Hongsheng Sun、Xiaojie Qiu、Yingzhong Shen、Juli Jiang、Leyong Wang
DOI:10.1016/j.jorganchem.2011.04.039
日期:2011.9
L1 = 3-(1-ethyl-1H-benzimidazol-2-yl)methyl)-1-((6-methylpyridin-2-yl)methyl)imidazolyl-idene), [Ni(L2)2(CH3CN)](PF6)2 (3b, L2 = 3-(1-ethyl-1H-benzimidazol-2-yl)methyl)-1-((6-methylpyridin-2-yl)-methyl)benzimidazolylidene), and [Hg(L1)2(CH3CN)2](PF6)2 (4) have been successfully prepared and fully characterized by NMR, ESI-MS spectroscopy, and X-ray diffraction analysis. The nickelcomplexes reveal
Design and synthesis of squaramide-based MOFs as efficient MOF-supported hydrogen-bonding organocatalysts
作者:Xiaoping Zhang、Zhenjie Zhang、Jake Boissonnault、Seth M. Cohen
DOI:10.1039/c6cc03190k
日期:——
Herein, we utilize a new, squaramide-based ligand, combined with a postsynthetic exchange (PSE) synthetic approach to prepare a series of Cu(ii)–squaramide MOFs that are active catalysts for the Friedel–Crafts reaction.
The base-free van Leusen reaction of cyclic imines on water: synthesis of <i>N</i>-fused imidazo 6,11-dihydro β-carboline derivatives
作者:Killari Satyam、V. Murugesh、Surisetti Suresh
DOI:10.1039/c9ob00660e
日期:——
imidazoles has been demonstrated on water under base-free conditions. The reaction of dihydro β-carboline imines and p-toluenesulfonylmethyl isocyanides furnished the corresponding substituted N-fused imidazo 6,11-dihydro β-carboline derivatives in very good yields under ambient conditions. The use of deuteriumoxide (D2O) as a solvent enabled the incorporation of deuterium isotopes in the imidazole ring
A novel pyrrolidinium ionic liquid with 1,1,2,2-tetrafluoro-2-(1,1,2,2-tetrafluoroethoxy)ethanesulfonate anion as a recyclable reaction medium and efficient catalyst for Friedel–Crafts alkylations of indoles with nitroalkenes
pyrrolidinium 1,1,2,2-tetrafluoro-2-(1,1,2,2-tetrafluoroethoxy)ethanesulfonate ([C4H8NH2][H(CF2)4O(CF2)2SO3]) is highly fluid even below room temperature. It can be used both as a recyclable solvent and as an efficientcatalyst for Friedel–Crafts alkylations of indoles with nitroalkenes.
合成了一系列带有新的含氟阴离子的吡咯烷鎓盐。通过改变阴离子的氟代烷基链的长度可以获得不同的熔点。1,1,2,2-四氟-2-(1,1,2,2-四氟乙氧基)乙磺酸吡咯烷鎓盐([C 4 H 8 NH 2 ] [H(CF 2)4 O(CF 2)2 SO 3 ])即使在室温以下也具有很高的流动性。它既可以用作可循环利用的溶剂,又可以用作吲哚与硝基烯烃的弗瑞德-克拉夫茨烷基化反应的有效催化剂。