Ball-milling synthesized hydrotalcite supported Cu–Mn mixed oxide under solvent-free conditions: an active catalyst for aerobic oxidative synthesis of 2-acylbenzothiazoles and quinoxalines,Green Chemistry

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Ball-milling synthesized hydrotalcite supported Cu–Mn mixed oxide under solvent-free conditions: an active catalyst for aerobic oxidative synthesis of 2-acylbenzothiazoles and quinoxalines
Green Chemistry ( IF 9.3 ) Pub Date : 2018-07-30 , DOI: 10.1039/c8gc01816b
Xu Meng _{1,

2,

3,

4,

5} , Xiuru Bi _{1,

2,

3,

4,

5} , Chaoying Yu _{1,

2,

3,

4,

5} , Gexin Chen _{1,

2,

3,

4,

5} , Baohua Chen _{5,

6,

7,

8} , Zhenqiang Jing _{4,

8,

9,

10} , Peiqing Zhao _{1,

2,

3,

4,

5}

Affiliation

A rapid solvent-free ball-milling method was developed to prepare a hydrophobic hydrotalcite supported Cu–Mn mixed oxide catalyst (Cu–Mn/HT). The mechanochemically prepared catalyst exhibited high catalytic activity and recyclability towards the aerobic synthesis of 2-acylbenzothiazoles and quinoxalines in green medium ethanol compared with the ones synthesized via grinding and wet-impregnation. Moreover, control experiments showed that the catalyst was successfully used in green oxidative esterification and coupling as well. Cu–Mn/HT was characterized by BET, ICP, XRD, XPS, SEM and TEM, which indicated that more surface oxygen vacancies and formed CuMn₂O₄ species on HT might contribute to the catalytic activity.

中文翻译：

在无溶剂条件下球磨合成的水滑石负载的Cu-Mn混合氧化物：一种有氧氧化合成2-酰基苯并噻唑和喹喔啉的活性催化剂

开发了一种快速的无溶剂球磨法，以制备疏水性水滑石负载的Cu-Mn混合氧化物催化剂（Cu-Mn / HT）。用机械化学方法制备的催化剂与通过研磨和湿浸渍法合成的催化剂相比，在绿色中等乙醇中对2-酰基苯并噻唑和喹喔啉的好氧合成具有较高的催化活性和可回收性。而且，对照实验表明该催化剂也成功地用于绿色氧化酯化和偶联。用BET，ICP，XRD，XPS，SEM和TEM对Cu-Mn / HT进行表征，表明HT上更多的表面氧空位和形成的CuMn ₂ O ₄可能有助于催化活性。

更新日期：2018-10-15

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