Enantioselective Zinc-Catalyzed Hydrosilylation of Ketones using Pybox or Pybim Ligands
作者:Kathrin Junge、Konstanze Möller、Bianca Wendt、Shoubhik Das、Dirk Gördes、Kerstin Thurow、Matthias Beller
DOI:10.1002/asia.201100561
日期:2012.2.6
The combination of ZnEt2 and chiral pyridinebisoxazoline (pybox) or pyridinebisimidazoline (pybim) ligands catalyzed the asymmetric hydrosilylation of aryl, alkyl, cyclic, heterocyclic, and aliphatic ketones. Under mild conditions, high yields and good enantioselectivities were achieved. ESI measurements allowed for the characterization of the active catalyst.
ZnEt 2和手性吡啶双恶唑啉(pybox)或吡啶双咪唑啉(pybim)配体的组合催化了芳基,烷基,环状,杂环和脂肪族酮的不对称氢化硅烷化。在温和的条件下,获得了高收率和良好的对映选择性。ESI测量允许表征活性催化剂。