Novel manganesecomplexes containing N4‐tetradentate ligands derived from chiral bipyrrolidinediamines catalyze the stereoselectiveepoxidation of a wide array of alkenesusing low catalyst loadings (0.1 mol%) and hydrogenperoxide (1.2 equiv.) as terminal oxidant. This family of catalysts affords good to excellent yields (80–100%) and moderate to good ees (40–73%) in short reaction times (30 min)
Highly Enantioselective Epoxidation of α,β-Unsaturated Ketones Catalyzed by Primary-Secondary Diamines
作者:Yingpeng Lu、Changwu Zheng、Yingquan Yang、Gang Zhao、Gang Zou
DOI:10.1002/adsc.201100230
日期:2011.11
The asymmetric epoxidation of α,β-unsaturated ketones has been achieved by using functional and readily accessible primary-secondarydiamines as the catalysts, giving the useful alkyl epoxy products with good yields and high enantioselectivities (up to 99% ee).
Asymmetric Epoxidation of Enones Promoted by Dinuclear Magnesium Catalyst
作者:Joanna A. Jaszczewska‐Adamczak、Jacek Mlynarski
DOI:10.1002/adsc.202100482
日期:2021.9.7
still a challenging task. In this perspective, we present the application of chiral dinuclear magnesium complexes for asymmetricepoxidation of a broad range of electron-deficient enones. We demonstrate that the in situ generated magnesium-ProPhenol complex affords enantioenriched oxiranes in high yields and with excellent enantioselectivities (up to 99% ee). Our extensive study verifies the literature
作者:Xingwang Wang、Corinna M. Reisinger、Benjamin List
DOI:10.1021/ja801181u
日期:2008.5.1
A highly enantioselective epoxidation of cyclicenones with hydrogen peroxide has been developed that is catalyzed by chiral primaryamine salts.
已经开发了由手性伯胺盐催化的环烯酮与过氧化氢的高度对映选择性环氧化。
Simple strategy for synthesis of optically active allylic alcohols and amines by using enantioselective organocatalysis
作者:Hao Jiang、Nicole Holub、Karl Anker Jørgensen
DOI:10.1073/pnas.0914523107
日期:2010.11.30
A simple organocatalytic one-pot protocol for the construction of opticallyactive allylic alcohols and amines using readily available reactants and catalyst is presented. The described reaction is enabled by an enantioselective enone epoxidation/aziridination-Wharton-reaction sequence affording two highly privileged and synthetically important classes of compounds in an easy and benign way. The advantages