Iron(II)-Catalyzed Intermolecular Amino-Oxygenation of Olefins through the N–O Bond Cleavage of Functionalized Hydroxylamines
作者:Deng-Fu Lu、Cheng-Liang Zhu、Zhen-Xin Jia、Hao Xu
DOI:10.1021/ja508057u
日期:2014.9.24
An iron-catalyzed diastereoselective intermolecular olefin amino-oxygenation reaction is reported, which proceeds via an iron-nitrenoid generated by the N–O bondcleavage of a functionalized hydroxylamine. In this reaction, a bench-stable hydroxylamine derivative is used as the amination reagent and oxidant. This method tolerates a range of synthetically valuable substrates that have been all incompatible
Iron(II)-Catalyzed Intermolecular Aminofluorination of Unfunctionalized Olefins Using Fluoride Ion
作者:Deng-Fu Lu、Cheng-Liang Zhu、Jeffrey D. Sears、Hao Xu
DOI:10.1021/jacs.6b07221
日期:2016.9.7
herein report a new catalytic method for intermolecular olefin aminofluorination using earth-abundant iron catalysts and nucleophilic fluoride ion. This method tolerates a broad range of unfunctionalizedolefins, especially nonstyrenyl olefins that are incompatible with existing olefin aminofluorination methods. This new iron-catalyzed process directly converts readily available olefins to internal vicinal
Photoredox-catalyzed difunctionalizations of alkenes with O-acyl hydroxylamine derivatives are described. The solvent tunes the outcome of these reactions. Diamidation and oxidative amidation of alkenes can be achieved in CH3CN and DMSO, respectively. A variety of 1,2-diamidates and α-amino ketones bearing many functional groups are prepared using Ir(ppy)3 as the photocatalyst under visible light irradiation
with the existing aminohydroxylation methods. It also provides valuable amino alcohol building blocks with regio- and stereochemical arrays that are complementary to known methods. A set of practical synthetic procedures for the iron-catalyzed intermolecular olefin aminohydroxylation reactions in gram scale is reported. In these transformations, a bench-stable functionalized hydroxylamine is applied