Ligand-Enabled Enantioselective Csp3
-H Activation of Tetrahydroquinolines and Saturated Aza-Heterocycles by Rh<sup>I</sup>
作者:Steffen Greßies、Felix J. R. Klauck、Ju Hyun Kim、Constantin G. Daniliuc、Frank Glorius
DOI:10.1002/anie.201805680
日期:2018.7.26
The first rhodium(I)‐catalyzed enantioselective intermolecular C –H activation of various saturated aza‐heterocycles including tetrahydroquinolines, piperidines, piperazines, azetidines, pyrrolidines, and azepanes is presented. The combination of a rhodium(I) precatalyst and a chiral monodentate phosphonite ligand is shown to be a powerful catalytic system to access a variety of important enantio‐enriched
首次展示了铑(I)催化 的各种饱和氮杂杂环的对映体分子间C– H活化,包括四氢喹啉,哌啶,哌嗪,氮杂环丁烷,吡咯烷和氮杂环庚烷。铑(I)预催化剂和手性单齿亚膦酸酯配体的组合被证明是一种强大的催化体系,可以从简单的起始原料中获得各种重要的对映体富集的杂环。值得注意的是, 由于相邻的C -H键,四氢喹啉的C- H活化特别具有挑战性。这种氧化还原中性方法为高化学选择性和对映选择性高达97%ee的α-N-芳基杂环提供了一条新的合成途径 。