Chinese Journal of Chemistry

Cover image for Vol. 32 Issue 7

Editors: Guozhen Ji, Shengming Ma

Online ISSN: 1614-7065

Associated Title(s): Chemistry - A European Journal, Chemistry – An Asian Journal, Israel Journal of Chemistry, The Chemical Record

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Recently Published Articles

  1. Complexation of Triptycene-Derived Macrotricyclic Host Containing Pyridine Groups with Paraquat Derivatives: A Switchable Process Controlled by Zn2+ Ions

    Ying Han, Jiabin Guo and Chuanfeng Chen

    Article first published online: 20 JUL 2014 | DOI: 10.1002/cjoc.201400400

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    A triptycene-derived macrotricyclic host containing two pyridine groups was synthesized, and it could form 1:1 stable host-guest complexes with paraquat derivatives in both solution and solid state. Especially, it was found that binding and releasing of the guest molecules in the complexes could be efficiently controlled by zinc ions.

  2. Polyvinylpyrrolidone as an Efficient Stabilizer for Silver Nanoparticles

    Weidong Huang, Linxia Zhang, Qiuping Yang and Zhimin Wang

    Article first published online: 20 JUL 2014 | DOI: 10.1002/cjoc.201400349

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    Surfactants screening demonstrated that PVP was an satisfactory stabilizer for AgNPs, which not only was effective at low concentration (0.1%, V/V), but also could protect silver colloids from aggregation for a long period at 1 mol·L−1 NaCl, and 6 h even at 3 mol·L−1 NaCl. It is worth pointing out that aggregation induced by salt is an irreversible process, that is, if sufficient NaCl solution was first added to silver colloids, the aggregated nanoparticles would not disperse nomatter which surfactant was added. The blue and red in the syringes represent surfactants and NaCl, respectively.

  3. Absolute Configurational Assignments of Amino Acid Esters by a CD-Sensitive Malonamide-Linked Zinc Bisporphyrinate Host

    Baozhen Liu, Jiaxun Jiang, Xianshi Fang and Chuanjiang Hu

    Article first published online: 20 JUL 2014 | DOI: 10.1002/cjoc.201400327

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    A novel malonamide-linked zinc bisporphyrinate [Zn2-1] has been synthesized and characterized. UV-vis and NMR spectroscopic studies suggest it aggregates in solution. When it is mixed with amino acid esters, it shows strong induced circular dichroism signals with the amplitude value up to ca. 1500 L·mol−1·cm−1.

  4. A New Cyclization/Decarboxylation Reaction of Isatins with Acyl Chlorides for the Facile Synthesis of 3-Alkenyl-Oxindoles

    Lin Chen, Zhijun Wu, Lin Peng, Qilin Wang, Xiaoying Xu and Lixin Wang

    Article first published online: 20 JUL 2014 | DOI: 10.1002/cjoc.201400320

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    The first cyclization/decarboxylation reaction of isatins with acyl chlorides promoted by 4-dimethylaminopyridine (DMAP) was described and a series of desired 3-alkenyl-oxindoles were obtained in good yields (up to 80%) and E/Z selectivities (up to 6.4/1).

  5. CuBr-Promoted Tandem Cyclization/Trifluoromethylation of 2-Alkynylanilines: Efficient Synthesis of 3-Trifluoromethylindoles

    Guangcun Ge, Xiaojun Huang, Changhua Ding, Hao Li, Shili Wan and Xuelong Hou

    Article first published online: 20 JUL 2014 | DOI: 10.1002/cjoc.201400298

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    A new efficient strategy for the synthesis of 3-trifluoromethyl-indoles was developed through tandem cyclization/trifluoromethylation of 2-alkynylanilines and Umemoto's reagent under effect of CuBr. The preliminary mechanism study indicates the solvent dimethylacetamide acts as the role of dealkylation.