Cu
<sup>II</sup>
‐Catalyzed Asymmetric Hydrosilylation of Diaryl‐ and Aryl Heteroaryl Ketones: Application in the Enantioselective Synthesis of Orphenadrine and Neobenodine
作者:Yao‐Zong Sui、Xi‐Chang Zhang、Jun‐Wen Wu、Shijun Li、Ji‐Ning Zhou、Min Li、Wenjun Fang、Albert S. C. Chan、Jing Wu
DOI:10.1002/chem.201200379
日期:2012.6.11
With certain amounts of sodium tert‐butoxide and tert‐butanol as additives, catalytic amounts of an inexpensive and easy‐to‐handle copper source Cu(OAc)2⋅H2O, a commercially available and air‐stable non‐racemic dipyridylphosphine ligand, as well as the stoichiometric desirable hydride donor polymethylhydrosiloxane (PMHS), formed a versatile in situ catalyst system for the enantioselective reduction
用一定量的钠的叔丁醇和叔丁醇作为添加剂,催化量的一种廉价的和易于手柄铜源的Cu(OAc)2 ⋅ ħ 2O,一种可商购的且稳定的非外消旋二吡啶基膦配体,以及理想的化学计量的氢化物供体聚甲基氢硅氧烷(PMHS),形成了一种通用的原位催化剂体系,用于对映选择性还原广谱的手性二芳基和芳基杂芳基酮空气,产率高,对映选择性好(至96%)。特别地,该方法的实际可行性通过其在光学富集的有效抗组胺药奥芬那君和新贝尼定的不对称合成中的成功应用得到证明。