Aza-Michael Addition of Amines to <font>α</font>,<font>β</font>-Unsaturated Compounds Using Molecular Iodine as Catalyst
作者:Kalyan Jyoti Borah、Mridula Phukan、Ruli Borah
DOI:10.1080/00397910903320241
日期:2010.8.31
Aza-Michael adducts are obtained in very good yields by the conjugate addition of aliphatic amines to α,β-unsaturated compounds using molecular iodine as catalyst in dichloromethane at room temperature. Aromatic amines were found to be reactive under reflux in toluene.
Polystyrene-supported CuI–imidazole complex catalyst for aza-Michael reaction of imidazoles with α,β-unsaturated compounds
作者:Lixia Li、Zuliang Liu、Qilong Ling、Xiaodong Xing
DOI:10.1016/j.molcata.2011.11.023
日期:2012.2
The polystyrene-supported CuI-imidazole complex catalyst was prepared and characterized by IR spectroscopy, elemental analysis, SEM/TEM and TG/DSC. The complex catalyst was globular with the size of 400-500 nm and showed a good thermal stability at high temperature. The immobilized Cu metal in the complex catalyst was about 0.85 mmol/g. By using the catalyst, aza-Michael reaction of imidazoles to alpha,beta-unsaturated compounds was performed with good yields in 4-8 h. The catalyst showed an excellent recycling efficiency over five cycles without distinct leaching of metal from the polymer support. (C) 2011 Elsevier B.V. All rights reserved.
1,8-Diazabicyclo[5.4.0]undec-7-ene (DBU)-promoted efficient and versatile aza-Michael addition
作者:Chang-Eun Yeom、Mi Jeong Kim、B. Moon Kim
DOI:10.1016/j.tet.2006.11.037
日期:2007.1
A convenient and versatile method was developed for aza-Michael addition using a substoichiometric amount of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU). Various nitrogen nucleophiles were efficiently introduced to a,a-unsaturated carbonyl compounds employing 0.5 equiv of DBU. Furthermore, other heteroatomic nucleophiles could also be introduced successfully under the same reaction conditions. (c) 2006 Elsevier Ltd. All rights reserved.
FLUORINATED OLEFINS AS WORKING FLUIDS AND METHODS OF USING SAME