The first environmentally benign, highly efficient conjugate addition of aliphatic amines to α,β-unsaturated compounds catalysed by simple quaternary ammonium salts and ionic liquids in the green solvent, water, is described.
Cellulose-Supported Copper(0) Catalyst for Aza-Michael Addition
作者:K. Reddy、Nadakudity Kumar
DOI:10.1055/s-2006-949623
日期:2006.9
Cellulose-supported copper(0) efficiently catalyzes the aza-Michael reaction of N-nucleophiles, such as amines and imidazoles with α,β-unsaturated compounds to produce the corresponding β-amino compounds and N-substituted imidazoles in excellent yields. The reactions are facile and the recovered catalyst is used for several cycles with consistent activity.
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。
13C-Nuclear Magnetic Resonance spectroscopy as a probe of enzyme environment—II
作者:Ian J.G. Climie、David A. Evans
DOI:10.1016/0040-4020(82)80213-5
日期:1982.1
proton-decoupled 13C-nuclearmagneticresonance spectra have been determined and in almost all cases, each carbon resonance has been unambiguously assigned by a combination of off-resonance and specific decoupling techniques. The effect of solvent and pH on chemical shifts is discussed. The objective of these studies is to provide models relevant to the use of 13C-labelled electrophilic inhibitors as probes of enzyme
Boric acid: a novel and safe catalyst for aza-Michael reactions in water
作者:Mihir K. Chaudhuri、Sahid Hussain、M. Lakshmi Kantam、B. Neelima
DOI:10.1016/j.tetlet.2005.09.167
日期:2005.11
Boric acid efficiently catalyzes the conjugate addition of aliphatic amines to alpha, beta-unsaturated compounds to produce beta-amino compounds, with great alacrity and excellent yields, in water under mild conditions. Aromatic amines do not participate effectively in the reaction. (c) 2005 Elsevier Ltd. All rights reserved.