CuBr-Catalyzed Reaction of<i>N</i>,<i>N</i>-Dimethylanilines and Silyl Enol Ethers: An Alternative Route to β-Arylamino Ketones
作者:Lehao Huang、Xunbin Zhang、Yuhong Zhang
DOI:10.1021/ol901347t
日期:2009.8.20
A wide range of silylenolethers undergo the reactions with N,N-dimethylanilines in the presence of transition metal catalysts under mild conditions to give β-arylamino ketones. In the cases of silylenolethers derived from unsymmetrical ketones, regiospecific addition of carbonyl compounds was obtained at the olefinic position of silylenolether.
with anilines to afford β-amino ketones which are converted into substituted quinolines in a one-pot fashion. The exclusive preference for N-alkylation over N-allylation makes this approach unique when compared to those reported in literature. Detailed mechanistic investigations reveal that the conjugate addition pathway was the predominant one over the allylic amination pathway. The notable aspects of
An efficient method was successfully developed to obtain cyclic β-amino ketones via visible-light photoredox catalysis. With this catalytic system, vinylazides and N-Ph pyrrolidines react to form cyclic β-amino ketones by α-amino radical addition. This method provides a simple, mild, straightforward, and novel paradigm to prepare important β-amino ketones.
We demonstrated that a cobalt(II)-TBHP ( tert -butyl hydroperoxide) oxidizing system efficiently catalyzes the coupling of aromatic tertiary amines with enol silyl ethers, producing the corresponding β-aminoketones.