Pd/C催化Suzuki偶联反应合成啶酰菌胺中间体  

Suzuki coupling reaction for synthesis of boscalid intermediate over Pd/C catalyst

作　　者：闫江梅 方礼理 张鹏 王昭文 李岳锋 张之翔 Yan Jiangmei;Fang Lili;Zhang Peng;Wang Zhaowen;Li Yuefeng;Zhang Zhixiang(Xi’an Catalyst New Materials Co.,Ltd.,Xi’an 710201,Shaanxi,China;National&Local Joint Engineering Research Center for New Noble Metal Catalysts R&D Technology,Xi’an 710201,Shaanxi,China;Shaanxi Key Laboratory of Catalytic Materials and Technology,Xi’an 710201,Shaanxi,China;Xi’an Key Laboratory of Catalytic Materials and Technology,Xi’an 710201,Shaanxi,China)

机构地区：[1]西安凯立新材料股份有限公司,陕西西安710201 [2]新型贵金属催化剂研发技术国家地方联合工程研究中心,陕西西安710201 [3]陕西省催化材料与技术重点实验室,陕西西安710201 [4]西安市催化材料与技术重点实验室,陕西西安710201

出　　处：《工业催化》2024年第3期35-40,共6页Industrial Catalysis

基　　金：陕西省技术创新引导专项(2023-YD-CGZH-01);陕西省自然科学基础研究计划(2023-JC-QN-0158);国家重点研发计划“催化科学”重点专项2022年度项目(2022YFA1503504)。

摘　　要：采用过氧化氢改性活性炭,并将其作为载体制备Pd/C催化剂。结果表明,通过不同温度处理,活性炭织构和表面性质被选择性地修饰,载体表面官能团影响钯纳米颗粒的分散度和化学状态。与其他处理温度相比,250℃处理的活性炭表面含有更多的酸性含氧基团,所制得Pd/C分散度最高。在催化Suzuki偶联反应合成啶酰菌胺中间体4′-氯-2-硝基联苯中活性显著提高,反应收率增加。酸性含氧基团为钯纳米颗粒在活性炭表面的分散提供了有效的锚定位点,促进了载体与钯纳米颗粒之间的电子转移,形成了相对缺电子的钯纳米颗粒,从而提高了Pd/C催化剂的活性。Activated carbon(AC)was modified with hydrogen peroxide and used as supports for preparation of Pd/C catalysts.The characterization results revealed that the AC textural structure and surface properties were selectively modified via different temperature treatments,and the surface functional groups of the supports could affect the dispersion and chemical states of Pd nanoparticles.Compared with other treatment temperatures,the surface of AC treated at 250℃contained more acidic oxygen-containing groups,and the as-prepared Pd/C showed the highest dispersion.In Suzuki coupling reaction for the synthesis of 4’-chloro-2-nitrobiphenyl,an intermediate of boscalid,the activity of the Pd/C was significantly improved,and the reaction yield was increased.The acidic oxygen-containing group provided an effective anchor sites for the dispersion of palladium nanoparticles on the surface of AC,promoted the electron transfer between the support and palladium nanoparticles,and formed relatively electron-deficient Pd nanoparticles,thus improving the activity of Pd/C catalyst.

关 键 词：催化剂工程 活性炭 改性 PD/C 表面官能团 SUZUKI偶联 

分 类 号：TQ426.6[化学工程] O643.36[理学—物理化学]