有机化学 ›› 1992, Vol. 12 ›› Issue (2): 155-159. 上一篇    下一篇

研究论文

Cp~2TiCl~2-PR^iMgBr体系中二苯乙炔的催化加氢反应

刘以寅;韩克飞;玄镇爱;陈美文   

  1. 南开大学元素有机化学研究所;南开大学化学系
  • 发布日期:1992-04-25

The catalytic hydrogenation of tolane in the presence of Cp~2TiCl~2-Pr^i MgBr system

LIU YIYIN;HAN KEFEI;XUAN ZHENAI;CHEN MEIWEN   

  • Published:1992-04-25

作者曾研究了炔烃的钛的钛氢化反应, 钛氢络合物是催化剂, 其主要还原剂是格氏试剂。该反应的优点是高度立体选择性和可控性, 但缺点是消耗大量格氏试剂。钱延龙等发现, 在催化剂量Cp~2TiCl~2Pr^iMgBr存在和常温常压下, 烯烃可被氢定量地还原为烷烃。在钛氢络合物存在下, 用色谱法对二苯乙炔与H~2的反应进行了跟踪, 首次发现在常温压下,炔烃经钛氢络合物催化, 也可加氢定量地生成烷烃。反应中间过程有顺式及反式烯烃的生成及转化, 本文确定了最佳反应条件, 提出了初步的反应机理设想。

关键词: 气相色谱, 钛氢络合物, 催化加氢, 苯乙炔, 镨化合物, 格氏试剂, 苯乙烷

Tracking by gas chromatog., tolan was hydrogenated in the presence of Cp2TiCl2-Me2CHMgBr. As intermediates cis-olefin and trans-olefin were formed and finally the alkane was obtained quant. Factors such as temperature, solvent and the amount of catalyst were studied. The reaction mechanism was discussed.

Key words: CATALYTIC HYDROGENATION, GAS CHROMATOGRAPHY, PHENYLETHANE, PRASEODYMIUM COMPOUNDS, PHENYL ACETYLENE, GRIGNARD REAGENT

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