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
Friedel-Crafts Alkylation of Indoles with Nitroalkenes through Hydrogen-Bond-Donating Metal-Organic Framework
作者:Purna Chandra Rao、Sukhendu Mandal
DOI:10.1002/cctc.201601583
日期:2017.4.7
Usually, urea derivatives undergo self‐recognition and aggregation during homogeneous catalytic processes. To avoid this, a new approach involving the incorporation of urea moieties into metal–organicframeworks (MOFs) was recently developed. Herein, we synthesized a new porous, zinc‐based MOF by using ureylenic acid that acts as a hydrogen‐bond‐donating catalyst. According to our knowledge, the pores
Friedel–Crafts alkylation reaction with fluorinated alcohols as hydrogen-bond donors and solvents
作者:Ren-Jin Tang、Thierry Milcent、Benoit Crousse
DOI:10.1039/c8ra01397g
日期:——
and electron-rich arenes with β-nitroalkenes in HFIP was reported. The desired products are formed rapidly in excellent yields under mild conditions without the need for any additional catalysts or reagents. Further, this methodology can be applied to one-pot synthesis of biologically active tryptamine derivatives.
据报道,在 HFIP 中吲哚和富电子芳烃与 β-硝基烯烃发生有效且清洁的 FC 烷基化。在温和条件下以优异的产率快速形成所需产物,无需任何额外的催化剂或试剂。此外,该方法可应用于生物活性色胺衍生物的一锅合成。
Enantioselective Friedel−Crafts Alkylation of Indoles with Nitroalkenes Catalyzed by Bifunctional Tridentate Bis(oxazoline)−Zn(II) Complex
作者:Shao-Feng Lu、Da-Ming Du、Jiaxi Xu
DOI:10.1021/ol060586f
日期:2006.5.1
[reaction: see text] A more practical and efficient catalytic asymmetric Friedel-Craftsalkylation of indoles with nitroalkenes using bifunctional tridentate bis(oxazoline)-Zn(OTf)(2) as catalyst has been developed. Various types of the nitroalkylated indoles were obtained in excellent yields (85-99%) and high enantioselectivities (up to 98% ee).
Asymmetric Friedel−Crafts Alkylations of Indoles with Nitroalkenes Catalyzed by Zn(II)−Bisoxazoline Complexes
作者:Yi-Xia Jia、Shuo-Fei Zhu、Yun Yang、Qi-Lin Zhou
DOI:10.1021/jo0516537
日期:2006.1.1
A novelasymmetric Friedel−Crafts alkylation of indoles with nitroalkenes catalyzed by Zn(II)−bisoxazoline complexes has been developed. The nitroalkylated indoles are synthesized in excellent yields and high enantioselectivities (up to 90% ee). The effects of ligand structure, metal salt, and solvent on the reaction are discussed. The substrates of the reaction can be aromatic, heteroaromatic, and