Rhodium-Catalyzed Alkene Hydrosilylation via a Hydride Shuttle Process by Diene Ligands: Dramatic Enhancement of Regio- and Diastereoselectivity
作者:Yuanda Hua、Hiep H. Nguyen、Gabriela Trog、Adam S. Berlin、Junha Jeon
DOI:10.1002/ejoc.201402742
日期:2014.9
ligand-assisted, Rh-catalyzed intramolecular alkene hydrosilylation of homoallylic silyl ethers (1) was developed to provide 1,3-trans-oxasilacyclopentanes (trans-2) in a highly regio- and diastereoselective manner. The modification of metal-ligand architecture employing an inner-sphere functional diene ligand (1,3-cyclohexadiene) and a supporting phosphine ligand (BINAP) was identified as responsible for
开发了一种协同配体辅助、Rh 催化的高烯丙基甲硅烷基醚 (1) 的分子内烯烃氢化硅烷化,以高度区域选择性和非对映选择性的方式提供 1,3-反式-氧硅杂环戊烷 (trans-2)。采用内球功能二烯配体(1,3-环己二烯)和支持膦配体(BINAP)对金属配体结构的修饰被确定为选择性的显着增强的原因。二烯配体介导的氢化物穿梭过程的机械细节被呈现为高选择性背后的潜在机械驱动力。