Role of graphene oxide as a heterogeneous acid catalyst and benign oxidant for synthesis of benzimidazoles and benzothiazoles

Kiran B. Dhopte; Rahul S. Zambare; Anand V. Patwardhan; Parag R. Nemade

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Role of graphene oxide as a heterogeneous acid catalyst and benign oxidant for synthesis of benzimidazoles and benzothiazoles

机译：石墨烯氧化物作为非均相酸催化剂的作用和合成苯并咪唑和苯并噻唑的良性氧化剂

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We report the synthesis of benzothiazoles and benzimidazoles using graphene oxide as an effective catalyst with good yields and easy recyclability. Graphene oxide plays the dual role of a metal-free acid catalyst and an oxidizing agent. The mechanism of action of graphene oxide as a catalyst was confirmed using X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy and transmission electron microscopy. Good yields were obtained at 60 °C as well as under ultrasonic irradiation at 35 °C with methanol as the solvent. Additionally, this is also the first report in which the regeneration of partially-reduced spent graphene oxide has been carried out to restore the oxygen containing functional groups and provide a path for the reuse of graphene oxide as the catalyst and oxidizing agent.

机译：我们用石墨烯氧化物作为有效催化剂报告苯并噻唑和苯并咪唑的合成，其产率良好，易再现性。石墨烯氧化物起到无金属酸催化剂和氧化剂的双重作用。使用X射线衍射，傅里叶变换红外光谱，拉曼光谱和透射电子显微镜确认作为催化剂的石墨烯作为催化剂的作用机理。在60℃下，在35℃下在35℃下以甲醇作为溶剂，获得良好的产率。另外，这也是第一报告，其中已经进行了部分减少的废石墨烯氧化物的再生以恢复含氧官能团，并提供用于将石墨烯作为催化剂和氧化剂再利用的路径。

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《RSC Advances》 |2016年第10期|共9页
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Kiran B. Dhopte; Rahul S. Zambare; Anand V. Patwardhan; Parag R. Nemade;
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1. Role of graphene oxide as a heterogeneous acid catalyst and benign oxidant for synthesis of benzimidazoles and benzothiazoles [J] . Dhopte Kiran B., Zambare Rahul S., Patwardhan Anand V., RSC Advances . 2016,第10期

机译：石墨烯氧化物作为非均相酸催化剂的作用和合成苯并咪唑和苯并噻唑的良性氧化剂
2. Synthesis of Benzoxazoles, Benzimidazoles, and Benzothiazoles Using a Br?nsted Acidic Ionic Liquid Gel as an Efficient Heterogeneous Catalyst under a Solvent-Free Condition [J] . The Thai Nguyen, Xuan-Trang Thi Nguyen, Thuy-Linh Ho Nguyen, ACS Omega . 2019,第1期

机译：在无溶剂条件下，使用Brαnsted酸性离子液体凝胶作为一种有效的非均相催化剂来合成苯并恶唑，苯并咪唑和苯并噻唑
3. 2-Arylation/alkylation of benzothiazoles using superparamagneticgraphene oxide-Fe3O4 hybrid material as a heterogeneous catalystwith diisopropyl azodicarboxylate (DIAD) as an oxidant [J] . Khalili Dariush, Etemadi-Davan Elham, Banazadeh Ali Reza Applied Organometallic Chemistry . 2018,第1期

机译：使用超顺磁性氧化物-FI3O4杂种材料作为氧化二异丙基二丙基偶氮二羧酸二异丙醇（DiaD）作为氧化剂的二异丙基氮杂唑（DiaD）的2-苯并噻唑烷基化/烷基化
4. Synthesis of Reduced Graphene Oxide-Supported PtAu Catalysts and Their Electrocatalytic Activity for Formic Acid Oxidation [C] . Arockiam John Jeevagan, Takao Gunji, Toyokazu Tanabe, Electrocatalysis 8 . 2016

机译：还原氧化石墨烯负载的PtAu催化剂的合成及其对甲酸氧化的电催化活性
5. Cytochrome P450cam as a biocatalyst: Studies on the benign synthesis of 2-ethylhexanoic acid. [D] . French, Kevin Joseph. 2001

机译：细胞色素P450cam作为生物催化剂：2-乙基己酸的良性合成研究。
6. Greener Route for Synthesis of aryl and alkyl-14H-dibenzo a.j xanthenes using Graphene Oxide-Copper Ferrite Nanocomposite as a Recyclable Heterogeneous Catalyst [O] . Aniket Kumar, Lipeeka Rout, Lakkoji Satish Kumar Achary, -1

机译：使用氧化石墨烯-铜铁氧体纳米复合材料作为可循环使用的多相催化剂合成芳基和烷基-14H-二苯并a.j黄嘌呤的绿色路线
7. Silica Supported Fluoroboric Acid: An Efficient and Reusable Heterogeneous Catalyst for Facile Synthesis of 2-Aliphatic Benzothiazoles, Benzoxazoles, Benzimidazoles and Imidazo4,5-bpyridines [O] . Abasaheb V. Patil, Babasaheb P. Bandgar, Soo-Hyoung Lee 2010

机译：二氧化硅负载氟硼酸：适用于2-脂族苯并噻唑，苯并唑，苯并咪唑和咪唑的化合合成的有效和可重复使用的非均相催化剂4,5-B吡啶

Role of graphene oxide as a heterogeneous acid catalyst and benign oxidant for synthesis of benzimidazoles and benzothiazoles

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