HOTf-catalyzed intermolecular hydroamination reactions of alkenes and alkynes with anilines
作者:Xuefeng Xu、Xu Zhang、Zhiqiang Wang、Manman Kong
DOI:10.1039/c5ra05209b
日期:——
Herein, the intermolecularhydroamination of alkenes and alkynes with anilines catalyzed by HOTf under mild conditions has been developed. This reaction provides one of the simplest alkene and alkyne addition methods and is an alternative to metal-catalyzed reactions. At the same time, the intramolecular hydroamination of alkynes with anilines proceeds smoothly to obtain quinolines. We found that this
Abstract Lithium tetrafluoroborate has been demonstrated for the first time to be an efficient catalyst in intermolecular aza-Michael addition aromatic amines to electron deficient alkenes. Suitability of the same catalyst in intramolecular aza-Michael addition leading 2-aryl-2,3-dihydroquinolin-4(1H) ones has also been described.
trifluoroacetate ([Hmim]TFA) is reported as a cost-effective catalyst for a simple and environmentally benign hetero-Michael reaction. [Hmim]TFA works both as reactionmedium and catalyst. The reaction is applicable to various aromatic sulfur and nitrogen nucleophiles. This method has advantages such as high yields, short reaction time, and simple workup. The catalyst could be recycled several times without any loss
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.
Boric Acid / Glycerol as an Efficient Catalyst for Synthesis of Thiomorpholine 1,1-Dioxide by Double Michael Addition Reaction in Water
作者:Azim Ziyaei Halimehjnai、Seyedmorteza Hosseyni、Hadi Gholami、Mohammed M. Hashemi
DOI:10.1080/00397911.2011.594930
日期:2013.1
Abstract Thiomorpholine 1,1-dioxides were prepared with double Michael addition reaction of aromatic amines to divinyl sulfone catalyzed by boricacid / glycerol in water. This catalyst system was also used for the Michael addition reaction of aromatic amines to electron-deficient alkenes. The reaction is simple and green and gives good to excellent yields. GRAPHICAL ABSTRACT