Chin. J. Org. Chem. ›› 2011, Vol. 31 ›› Issue (07): 1095-1099. Previous Articles     Next Articles

Notes

硼氢化钠还原9-亚芴基丙二腈的反应机理研究

冯乙巳1,2,张博1,杨春燕1,许华建*,1,2   

  1. (1合肥工业大学化学工程学院 合肥 230009)
    (2可控化学与材料化工安徽省重点实验室 合肥 230009)
  • 收稿日期:2010-12-29 修回日期:2011-01-27 发布日期:2011-02-18
  • 通讯作者: 许华建 E-mail:hjxu@hfut.edu.cn

Study on the Mechanism of Reduction of 9- Fluorenylidenemalononitrile with NaBH4

Feng Yisi1,2 Zhang Bo1 Yang Chun-yang1 Xu Huajian*,1,2   

  1. (1 School of Chemical and Engineering, Hefei University of Technology, Hefei 230009)
    (2 Anhui Key Laboratory of Controllable Chemistry Reaction & Material Chemical En-gineering, Hefei 230009)
  • Received:2010-12-29 Revised:2011-01-27 Published:2011-02-18
  • Contact: XU Hua-Jian E-mail:hjxu@hfut.edu.cn

The reduction of 9-fluorenylidenemalononitrile (FDCN) by NaBH4 in oxygen-free and saturated oxygen condition was studied respectively in this paper. The results showed that electron transfer can occur and α-carbon-anion produced firstly in the reaction system. In oxygen-free condition, the proton attacked α-carbon-anion to generate the corresponding reduction product. In the CH3CN-CH3OD mixed solvent, the yield of major product 9-d-FDCNH was improved on prolonging the reaction time or increasing reaction temperature. In saturated oxygen solution, the generation of oxidation product 9-fluorenone (FDO) was due to the incoordinate hydride transfer mechanism. In other words, electron transfer was slightly faster than hydrogen atom transfer.

Key words: NaBH4, FDCN, reduction reaction, electron transfer