Synthesis of Catalytically Active Ruthenium Complexes with a Remote Chiral Lactam as Hydrogen-Bonding Motif
作者:Thorsten Bach、Felix Voss、Florian Vogt、Eberhardt Herdtweck
DOI:10.1055/s-0030-1258424
日期:2011.3
A terminal alkyne was prepared, which is linked by a carbon-carbon bond to a conformationally restricted, U-shaped chiral lactam, that is, more precisely, to carbon atom C7 of 1,5,7-trimethyl-3-azabicyclo[3.3.1]nonan-2-one. The alkyne was connected to various ligands (bipyridine, terpyridine, pybox) by Sonogashira cross-coupling with the respective bromides or triflates. The resulting products were
制备了末端炔,其通过碳-碳键与构象受限的U形手性内酰胺连接,更确切地说,与1,5,7-三甲基-3-氮杂双环[3.3]的碳原子C7连接.1] nonan-2-one。通过Sonogashira与相应的溴化物或三氟甲磺酸酯的交叉偶联,炔烃与各种配体(联吡啶,三联吡啶,pybox)连接。将所得产物转化为四种确定的钌配合物(产率58-94%)。该配合物包含催化活性金属中心,该中心在空间上远离手性内酰胺的氢键基序。这些配合物中的一种的初步实验证明,该配合物在氧化反应中显示出催化活性,并且由于底物与手性内酰胺的配位而实现了对映选择性。 超分子化学-氢键-催化-配位化学-交叉偶联反应