科研之友
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摘要
We demonstrated a convenient new procedure of the Ullmann homocoupling reaction for the synthesis of symmetrical biaryls via homocoupling of aryl iodides over a recyclable gold catalyst comprising Au nanoparticles supported on functional magnetic mesoporous silica (alpha-Fe2O3)-MCM-41-HS-Au. The catalyst was easily separated by an external magnet, and the recovered catalyst was reused in six successive reaction cycles without any significant loss of activity. So, using this catalyst is affordable. Also, the reaction time is much shorter than a few previously reported work. [GRAPHICS] .
- 出版日期2017-5
