室温下钯催化生成联苯的合成方法

Preparation of Biphenyl from Benzene at Room Temperature Catalyzed by Pd(Ⅱ)

在催化量级的二价钯和氧化剂的作用下,苯直接经碳氢键活化在酸性体系中室温下氧化偶联生成联苯。通过对各种催化剂、氧化剂、酸等因素对联苯产物生成的影响的考察,醋酸钯/过硫酸钾/三氟乙酸体系确定为最有效的反应体系,联苯收率在24 h内可达24%,转化数TON值为6.0。

Biphenyl was produced by direct oxidative coupling of benzene via activation of the C-H bond in the presence of palladium acetate as the catalyst and potassium persulfate as the oxidant in trifluoroacetic acid at room temperature. Effect of catalyst, oxidant, and acid etc. on this reaction was investigated.