A simple and efficient method for the deoxygenation of amine N-oxides to corresponding amines is reported using the green and economical reagent phenylboronic acid. Deoxygenation of N,N-dialkylaniline N-oxides, trialkylamine N-oxides and pyridineN-oxides were achieved in good to excellent yields. The reduction susceptible functional groups such as ketone, amide, ester and nitro groups are well tolerated
Rh(<scp>iii</scp>)-catalyzed chemoselective C–H functionalizations of tertiary aniline N-oxides with alkynes
作者:Xiaolei Huang、Wenbo Liang、Yang Shi、Jingsong You
DOI:10.1039/c6cc02217k
日期:——
Two novel Rh(iii)-catalyzed chemoselective functionalizations of tertiary aniline N-oxides with alkynes, including annulation via the sequential C(sp2)–H and C(sp3)–N activation and an O-atom transfer (OAT) process, have been described.
The mechanistic mode of oxidation of substituted n,n-dimethylanilines, thioanisoles, and methyl phenyl sulfoxides by 5-ethyl-4a-hydroperoxy-3-methyl-lumiflavin (4a-FlEt-OOH)
作者:Shigeru Oae、Kaoru Asada、Toshiaki Yoshimura
DOI:10.1016/s0040-4039(00)81631-7
日期:1983.1
In the oxidation of the title compounds, 5-ethyl-4a-hydroperoxy-3-methyl-lumiflavin (4a-FlEt-OOH), was found to be an electrophilic oxidant similar to m-chloroperoxybenzoic acid. However, the stereoselectivity of the oxidation of cyclic sulfides to the corresponding sulfoxides by 4a-FlEt-OOH was less pronounced than that of the oxygenation with flavin-containing monooxygenase.
Unlike the real enzyme, FAD-containing monooxygenase, 4a-FlEt-OOH, oxidizes most of common primary, secondary and tertiary water-soluble amines, such as N-methylmorpholine and n-octylamine. Both kinetic rates and products of the oxidation were obtained. The plots of the rates vs. pKa values gave three different correlations lines depending upon the types of amines.
Organotin(IV) complexes of some N,N-dimethylaniline N-oxide derivatives