Nanosized TiO2 as a Recyclable Heterogeneous Catalyst for the Synthesis of Tetrahydrobenzo[b]pyran Derivatives
Nanosized TiO2 as a Recyclable Heterogeneous Catalyst for the Synthesis of Tetrahydrobenzo[b]pyran Derivatives
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DOI：
10.1007/s10876-013-0626-8
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发表时间：
2014-03-01
影响因子：
2.8
通讯作者：
Rajbhoj, Anjali S.
中科院分区：
文献类型：
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作者：
Anandgaonker, Priyanka L.;Jadhav, Sunita;Rajbhoj, Anjali S.
采用电化学还原法制备了TiO2纳米颗粒，其中铵稳定剂的存在防止了团聚形成不希望的金属粉末。采用uv -可见、XRD、SEM-EDS和TEM等分析技术对合成的纳米颗粒进行了表征。在无溶剂条件下，在室温下简单搅拌，将合成的TiO2纳米颗粒作为非均相催化剂，用于芳香醛、二酮和丙二腈三组分反应合成四氢苯并[b]吡喃衍生物。
An electrochemical reduction method was used for the preparation of TiO2 nanoparticles in which agglomeration with formation of undesired metal powders is prevented by the presence of ammonium stabilizers. These synthesized nanoparticles were characterized by UV-Visible, XRD, SEM-EDS and TEM analysis techniques. These synthesized nanoparticles of TiO2 were tested as heterogeneous catalyst for the synthesis of tetrahydrobenzo[b]pyran derivative using three components reaction of aromatic aldehyde, dimedione and malononitrile by simply stirring at room temperature in a solvent free condition.