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有机化学
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有机化学 ›› 2006, Vol. 26 ›› Issue (08): 1111-1114. 上一篇    下一篇

研究简报

三氟甲磺酸盐催化甲苯硝化反应的研究

李小青，杜晓华*，徐振元*   

  1. (浙江工业大学催化加氢研究中心 绿色化学合成技术国家重点实验室培育基地 杭州 310014)
  • 收稿日期:2005-09-28 修回日期:2006-02-18 发布日期:2006-07-26
  • 通讯作者: 杜晓华*，徐振元*

Toluene Nitration Catalyzed by Metal Triflates

LI Xiao-Qing,DU Xiao-Hua*,XU Zhen-Yuan*   

  1. (State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Catalytic Hydrogenation Re-search Center, Zhejiang University of Technology, Hangzhou 310014)
  • Received:2005-09-28 Revised:2006-02-18 Published:2006-07-26
  • Contact: DU Xiao-Hua*,XU Zhen-Yuan*

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1886

被引次数

38

利用三氟甲磺酸盐作为新型的Lewis酸催化剂, 用于甲苯与等物质的量的硝酸的硝化反应. 通过对不同催化剂进行考察发现Zr(OTf)4和Sm(OTf)3的催化性能最好, 甲苯转化率分别达77.1%和67.4%. 使用98%硝酸能使转化率达100%, 而用甲苯作溶剂时转化率达95.4%. 对硅胶负载催化剂的考察发现硅胶负载催化剂Sm(OTf)3能使甲苯转化率升至89.9%, 且异构体分布有所改变, 其o∶m∶p为44.6∶5.7∶49.7.

关键词: 三氟甲磺酸盐, 硅胶, 甲苯硝化, 负载催化剂

In this paper, the metal triflates were employed as Lewis acid catalysts for nitration of toluene with 1 equiv. of nitric acid. Zr(OTf)4 and Sm(OTf)3 were found to be the most effective ones among the catalysts investigated, and the conversions of toluene were 77.1% and 67.4% respectively. The conversion of 100% could be reached with 98% nitric acid, while the conversion became 95.4% when toluene was used as solvent. The conversion of toluene was achieved to 89.9% with the isomer distributing of o∶m∶p＝44.6∶5.7∶49.7 when using Sm(OTf)3 loading on silica gel.

Key words: silica gel, supported catalyst, toluene nitration, metal triflate