Asymmetric Transfer Hydrogenation of (Hetero)arylketones with Tethered Rh(III)–<i>N</i>-(<i>p</i>-Tolylsulfonyl)-1,2-diphenylethylene-1,2-diamine Complexes: Scope and Limitations
作者:Long-Sheng Zheng、Quentin Llopis、Pierre-Georges Echeverria、Charlène Férard、Gérard Guillamot、Phannarath Phansavath、Virginie Ratovelomanana-Vidal
DOI:10.1021/acs.joc.7b00436
日期:2017.6.2
A series of new tethered Rh(III)/Cp* complexes containing the N-(p-tolylsulfonyl)-1,2-diphenylethylene-1,2-diamine ligand have been prepared, characterized, and evaluated in the asymmetric transfer hydrogenation (ATH) of a wide range of (hetero)aryl ketones. The reaction was performed under mild conditions with the formic acid/triethylamine (5:2) system as the hydrogen source and provided enantiomerically
一系列含有N-(p-甲苯基磺酰基)-1,2-二苯基乙烯-1,2-二胺配体已经在各种(杂)芳基酮的不对称转移氢化(ATH)中进行了制备,表征和评价。反应在温和条件下以甲酸/三乙胺(5:2)系统为氢源进行,以高收率和高至优异的对映选择性提供了对映体富集的醇。尽管苯基束缚环上取代基的性质没有改变反应的立体化学结果,但是带有给电子基团的配合物比具有吸电子基团的配合物具有更高的催化活性。将4-苯并二氢呋喃的ATH放大至克级,可以定量还原出具有优异对映选择性的还原产物,