Cp_2TiCl_2Pr^iMgBr体系中二苯乙炔的催化加氢反应  

The Catalytic Hydrogenation of Tolane in the Presence of Cp_2 TiCl_2-Pr^i MgBr System

作　　者：刘以寅[1] 韩克飞[1] 玄镇爱[1] 陈美文[2] 

机构地区：[1]南开大学元素有机化学研究所,天津300071 [2]南开大学化学系,天津300071

出　　处：《有机化学》1992年第2期155-159,共5页Chinese Journal of Organic Chemistry

基　　金：国家自然科学基金

摘　　要：我们曾研究了炔烃的钛氢化反应,钛氢络合物是催化剂,其主体还原剂是格氏试剂。该反应的优点是高度立体选择性和可控性,但缺点是需消耗大量格氏试剂。钱延龙等发现,在催化剂量CP2TiCl2-PrMgBr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H2的反应进行了跟踪,首次发现在常温常压下,炔烃经钛氢络合物催化。Tracking by gas chromatography, we have firstly discovered that tolane can behydrogenated in the presence of Cp_2TiCl_2-Pr^1MgBr. As intermediates cis-olefin and trans-olefin are formed and finally the alkane is obtained quantitatively. The influential factorssuch as temperature. solvent and the amount of catalyst are studied. A proposal on the reac-tion mechanism is discussed.

关 键 词：二苯乙炔 催化加氢 钛氢络合物 

分 类 号：O625.12[理学—有机化学]