Catalytic Bromination of Alkyl sp<sup>3</sup>C–H Bonds with KBr/Air under Visible Light
作者:Mengdi Zhao、Wenjun Lu
DOI:10.1021/acs.orglett.8b02208
日期:2018.9.7
Alkyl sp3C–H bonds of cycloalkanes and functional branch/linear alkanes have been successfully brominated with KBr using air or O2 as an oxidant at room temperature to 40 °C. The reactions are carried out in the presence of catalytic NaNO2 in 37% HCl (aq)/solvent under visible light, combining aerobic oxidations and photochemical radical processes. For various alkane substrates, CF3CH2OH, CHCl3, or CH2Cl2
An efficient protocol for enantioselective domino Michael/α-alkylation between α,β-unsaturated aldehydes and non-stabilized nitro alkyl halides has been reported. Reaction catalyzed by chiral secondary amines as organocatalysts gives an access to enantiomerically enriched 1,2,3-trisubstituted cyclopentanes with wide range of substitution.
Total Synthesis of (+)-Epilupinine via An Intramolecular Nitrile Oxide-Alkene Cycloaddition
作者:Deyong Su、Xinyan Wang、Changwei Shao、Jimin Xu、Rui Zhu、Yuefei Hu
DOI:10.1021/jo101910r
日期:2011.1.7
(R)-(2-vinylpiperid-1-yl)propanal by routine methods. Thus, by using Fukuyama’s oxime synthesis, a general method was developed for highly efficient conversion of 3-(N,N-dialkylamino)propanols into 3-(N,N-dialkylamino)propanal oximes without using the corresponding aldehydes.