Palladium(II)‐Catalyzed Enantioselective Aminotrifluoromethoxylation of Unactivated Alkenes using CsOCF
<sub>3</sub>
as a Trifluoromethoxide Source
作者:Chaohuang Chen、Philipp Miro Pflüger、Pinhong Chen、Guosheng Liu
DOI:10.1002/anie.201813591
日期:2019.2.18
accessible and stable CsOCF3 as a trifluoromethoxide source has been developed, which affords a wide variety of enantiomerically enriched β‐substituted OCF3‐containing piperidines in good yields. Introducing a sterically bulky group into pyridine‐oxazoline (Pyox) ligands is crucial to increasing both reactivity and enantioselectivity for the reaction. Additionally, the reaction features good functional group
已开发出使用容易获得且稳定的CsOCF 3作为三氟甲醇源的未活化烯烃的不对称Pd II催化的分子内氨基三氟甲氧基化反应,可提供高收率的多种对映异构体富集的含β-取代的OCF 3的哌啶。在吡啶-恶唑啉(Pyox)配体中引入空间庞大的基团对于提高反应的反应性和对映选择性至关重要。另外,该反应具有良好的官能团相容性和温和的反应条件。