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  1. Article: A carrier-free and recyclable protocol for the cross-coupling of terminal alkynes with arylboronic acids in H2O/TBAB

    Tang, Bo-Xiao / Chen, Jia-Ping / Huang, Xiang / Kuang, Ren-Yun / Shen, Yu-Jun / Wen, Ji-Wu / Wu, Wen-Ying / Zhang, Zhen-Xing

    Tetrahedron letters. 2019 July 25, v. 60, no. 30

    2019  

    Abstract: A new and recyclable protocol was developed for Pd(OAc)2-catalyzed the cross-coupling reaction of terminal alkynes with arylboronic acids using environmentally friendly H2O/TBAB as reaction medium. A series of cross-coupling products containing internal ... ...

    Abstract A new and recyclable protocol was developed for Pd(OAc)2-catalyzed the cross-coupling reaction of terminal alkynes with arylboronic acids using environmentally friendly H2O/TBAB as reaction medium. A series of cross-coupling products containing internal acetylenic bond can be obtained with good selectivity and yield. The Pd(OAc)2/H2O/TBAB system was stable in the Sonogashira-type cross-coupling reaction and could be used at least three cycles without considerable decrease in catalytic performance. The results suggest that the unsupported and recyclable systems can be extended to the other realm of CC bond formation in synthetic organic chemistry.
    Keywords acids ; alkynes ; catalytic activity ; chemical bonding ; chemical structure ; cross-coupling reactions ; organic chemistry ; palladium
    Language English
    Dates of publication 2019-0725
    Size p. 1975-1977.
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 204287-3
    ISSN 1873-3581 ; 0040-4039
    ISSN (online) 1873-3581
    ISSN 0040-4039
    DOI 10.1016/j.tetlet.2019.06.047
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 2837: Show issues Location:
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  2. Article: {μ-6,6'-Dimeth-oxy-2,2'-[ethane-1,2-diylbis(nitrilo-methyl-idyne)]diphenolato}-μ-nitrato-dinitratoterbium(III)zinc(II).

    Chen, Jing-Rong / Sui, Yan / Chen, Li / Wen, Ji-Wu / Yin, Li-Yang

    publication RETRACTED

    Acta crystallographica. Section E, Structure reports online

    2008  Volume 64, Issue Pt 4, Page(s) m562–3

    Abstract: In the title heteronuclear Zn(II)-Tb(III) complex (systematic name: {6,6'-dimeth-oxy-2,2'-[ethane-1,2-diylbis(nitrilo-methyl-id-yne)]diphenolato-1κ(4)O(6),O(1),O(1'),O(6')}:2κ(4)O(1),N,N',O(1')-μ-nitrato-1:2κ(2)O:O'-dinitrato-1κ(4)O,O'-terbium(III)zinc( ... ...

    Abstract In the title heteronuclear Zn(II)-Tb(III) complex (systematic name: {6,6'-dimeth-oxy-2,2'-[ethane-1,2-diylbis(nitrilo-methyl-id-yne)]diphenolato-1κ(4)O(6),O(1),O(1'),O(6')}:2κ(4)O(1),N,N',O(1')-μ-nitrato-1:2κ(2)O:O'-dinitrato-1κ(4)O,O'-terbium(III)zinc(II)), [TbZn(C(18)H(18)N(2)O(4))(NO(3))(3)], with the hexa-dentate Schiff base compartmental ligand N,N'-bis-(3-methoxy-salicyl-idene)ethyl-enediamine (H(2)L), the Tb and Zn atoms are triply bridged by two phenolate O atoms of the Schiff base ligand and one nitrate ion. The five-coordinate Zn atom is in a square-pyramidal geometry with the donor centers of two imine N atoms, two phenolate O atoms and one of the bridging nitrate O atoms. The Tb(III) center has a ninefold coordination environment of O atoms, involving the phenolate O atoms, two meth-oxy O atoms, two O atoms from two nitrate ions and one from the bridging nitrate ion. Weak inter-molecular C-H⋯O inter-actions generate a two-dimensional layer structure.
    Language English
    Publishing date 2008-03-20
    Publishing country United States
    Document type Journal Article ; Retracted Publication
    ZDB-ID 2041947-8
    ISSN 1600-5368
    ISSN 1600-5368
    DOI 10.1107/S1600536808006958
    Database MEDical Literature Analysis and Retrieval System OnLINE

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