Palladium and platinum catalyzed hydroselenation of alkynes: SeH vs SeSe addition to CC bond
作者:Valentine P Ananikov、Denis A Malyshev、Irina P Beletskaya、Grigory G Aleksandrov、Igor L Eremenko
DOI:10.1016/s0022-328x(03)00546-1
日期:2003.8
alkynes catalyzed by Pd(PPh3)4 and Pt(PPh3)4 has shown that the palladium complex gives products of both SeH and SeSe bond addition to the triple bond of alkynes, while the platinum complex selectively catalyzes SeH bond addition. The key intermediate of PhSeH addition to the metal center, namely Pt(H)(SePh)(PPh3)2, was detected by 1H-NMR spectroscopy. The analogous palladium complex rapidly decomposes
对Pd(PPh 3)4和Pt(PPh 3)4催化的炔烃加氢精制的机理研究表明,钯配合物使SeH和SeSe键的产物加成到炔烃的三键上,而铂络合物选择性催化SeH键的添加。通过1 H-NMR光谱检测到PhSeH添加到金属中心的关键中间体,即Pt(H)(SePh)(PPh 3)2。类似的钯配合物随着分子氢的释放而迅速分解。开发了一种方便的方法来制备马尔可夫尼可夫盐精制产物H 2CC(SePh)R,并研究了该反应的范围。的马氏产物H的第一X射线结构2 CC(SEPH)CH 2 Ñ + HME 2 ·HOOCCOO -报道。