1,4-Dihydropyridyl complexes of magnesium: synthesis by pyridine insertion into the magnesium–silicon bond of triphenylsilyls and catalytic pyridine hydrofunctionalization
作者:L. E. Lemmerz、T. P. Spaniol、J. Okuda
DOI:10.1039/c8dt01466c
日期:——
Magnesium bis(triphenylsilyl) [Mg(SiPh3)2(THF)2]·THF (1) reacted with a stoichiometric amount of pyridine to give the magnesium 4-(triphenylsilyl)dihydropyridyl complex [Mg(NC5H5-4-SiPh3)2(THF)3] (2). Using an excess of pyridine, a mixture of magnesium dihydropyridyl [Mg(NC5H6)2(py)4] (3) and 4-(triphenylsilyl)pyridine was formed. Complex 3 underwent exchange with pyridine-d5 at 25 °C to give [Mg(NC5D5H-4)2(py-d5)4]
双(三苯基甲硅烷基)镁[Mg(SiPh 3)2(THF)2 ]·THF(1)与化学计量的吡啶反应,得到4-(三苯基甲硅烷基)二氢吡啶基镁复合物[Mg(NC 5 H 5 -4- SiPh 3)2(THF)3 ](2)。使用过量的吡啶,形成二氢吡啶基镁[Mg(NC 5 H 6)2(py)4 ](3)和4-(三苯基甲硅烷基)吡啶的混合物。配合物3与吡啶-d 5交换在25°C下得到[Mg(NC 5 D 5 H-4)2(py- d 5)4 ](3-HD)。与我类似反应3 TACD负载镁triphenylsilyls [(ME 3 TACD)的Mg(SIPH 3)](4)和[(ME 3 TACD·ALET 3)的Mg(SIPH 3)](6)((ME 3 TACD) H = Me 3 [12] aneN 4:1,4,7-三甲基-1,4,7,10-四氮杂环十二烷)与吡啶反应得到[(Me 3 TACD)Mg(NC