Copper-Catalyzed Aza-Michael Addition of Aromatic Amines or Aromatic Aza-Heterocycles to α,β-Unsaturated Olefins
作者:Seongcheol Kim、Seongil Kang、Gihyeon Kim、Yunmi Lee
DOI:10.1021/acs.joc.6b00341
日期:2016.5.20
A highly efficient and mild Cu-catalyzed conjugate addition reaction of aromaticamines and aromatic aza-heterocycles to α,β-unsaturated olefins is described. The transformation is promoted by 3–7 mol % of a Cu complex generated in situ from a mixture of inexpensive CuCl, a readily available phosphine or imidazolium salt, and KOt-Bu at ambient temperature. A wide range of β-amino sulfone, β-amino nitrile
描述了芳族胺和芳族氮杂杂环对α,β-不饱和烯烃的高效且温和的Cu催化的共轭加成反应。在环境温度下,由廉价的CuCl,易得的膦或咪唑鎓盐和KO t -Bu的混合物原位生成的3–7 mol%的Cu络合物促进了这种转变。可以高效,有选择地合成大量β-氨基砜,β-氨基腈和β-氨基羰基化合物(62–99%)。
An effective aza-Michael addition of aromatic amines to electron-deficient alkenes in alkaline Al2O3
作者:Xin Ai、Xin Wang、Jin-ming Liu、Ze-mei Ge、Tie-ming Cheng、Run-tao Li
DOI:10.1016/j.tet.2010.05.054
日期:2010.7
Aza-Michaeladdition of aromatic or aliphatic amines with various electron-deficient alkenes was performed using alkaline Al2O3 as solid media at room temperature afforded the corresponding Michael addition products in good to excellent yields. The alkaline Al2O3 can be easily recovered and reused.
在室温下,使用碱性Al 2 O 3作为固体介质,对芳香族或脂肪族胺与各种缺电子的烯烃进行Aza-Michael加成反应,得到了相应的Michael加成产物,收率良好至极佳。碱性Al 2 O 3可以容易地回收和再利用。
β-Cyclodextrin promoted aza-Michael addition of amines to conjugated alkenes in water
Highly efficient and environmentally benign aza-Michaeladditions of amines to α,β-unsaturated compounds catalyzed by β-cyclodextrin in water to produce the corresponding β-amino compounds in excellent yields under mild conditions are described. β-Cyclodextrin can be recovered and reused in subsequent reactions without loss of activity.
Green synthesis of CuO nanoparticles using <i>Lantana camara</i> flower extract and their potential catalytic activity towards the aza-Michael reaction
作者:Rakesh Chowdhury、Aslam Khan、Md. Harunar Rashid
DOI:10.1039/d0ra01479f
日期:——
An easy and convenient synthesis process is reported for the synthesis of CuO nanoparticles using plant extract for use as a catalyst in the aza-Michael addition reaction.
12-Tungstophosphoric acid (H 3 PW 12 O 40 )has been found to be an efficient and recyclable catalyst in promotingroom temperature Michael additions of amines and aryl thiols to α,β-unsaturated estersand acrylonitrile in water to afford the corresponding saturatedamines in good to excellent yields.