21854-76-2Relevant articles and documents
Mannich-type reaction promoted by an ionic liquid
Akiyama, Takahiko,Suzuki, Akihiro,Fuchibe, Kohei
, p. 1024 - 1026 (2005)
The Mannich-type reaction of silyl enolates with aldimines occurred smoothly with [emim]OTf as a solvent and without the addition of an activator to afford β-amino carbonyl compounds in excellent yields.
Bronsted acid-surfactant-combined catalyst for the Mannich reaction in water
Chang, Tao,He, Leqin,Bian, Li,Han, Haiyan,Yuan, Mingxia,Gao, Xiaorui
, p. 727 - 731 (2014/01/06)
A series of Bronsted acid-surfactant-combined catalysts (BASCs) functionalised with different acids have been synthesized and applied to catalyze the three-component Mannich reaction with aldehyde, acetone and amine at 25 °C in water. The effects of cation tail length and ions of the ionic liquid and the recyclability of the catalysts and BASC acidity (H0) were investigated. The results demonstrated that the 3-(N,N- dimethyloctylammonium) propanesulfonic acid toluene sulfate ([DOPA][Tos]) provide the best catalytic activity because of the formation of emulsions during the reaction. The catalytic procedure was simple and the catalyst could be recycled 9 times by simple separating processes without noticeably decreasing the catalytic activity. The Royal Society of Chemistry 2014.
Heteropoly acid in ionic liquid - An efficient and recyclable system for one-pot three-component Mannich reaction
Rasalkar, Maghana S.,Bhilare, Sachin V.,Deorukhkar, Amol R.,Darvatkar, Nitin B.,Salunkhe, Manikrao M.
, p. 77 - 80 (2008/02/04)
This paper describes a one-pot three-component Mannich reaction, catalyzed by phosphotungstic acid (H3PW12O40), a heteropoly acid in ionic liquid. The catalyst was found to be mild and efficient, and the protocol affords β-arnino ketones in good yields under ambient conditions. Several ionic liquids and conventional organic solvents were employed for the reaction. The ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim]BF4) offered the best results in terms of yield of the products. It was observed that a Homogeneous reaction medium proved beneficial for the yield of the reaction.