Ytterbium triflate hydrate catalyzed Michael addition and cyclocondensation of α,β-unsaturated ketones with active methylene compounds

2008 ◽  
Vol 19 (9) ◽  
pp. 1024-1026 ◽  
Author(s):  
Zhi Wei Chen ◽  
Yan Li Wang ◽  
Ren Er Chen ◽  
Wei Ke Su
Keyword(s):  
Michael Addition ◽  
Unsaturated Ketones ◽  
Ytterbium Triflate ◽  
Active Methylene Compounds ◽  
Active Methylene

Ionic-liquid-supported 1,5,7-triazabicyclo[4.4.0]dec-5-ene — An efficient and recyclable organocatalyst for Michael addition to α,β-unsaturated ketones

2012 ◽  
Vol 90 (3) ◽  
pp. 290-297 ◽  
Author(s):  
Manoj Kumar Muthyala ◽  
Bhupender S Chhikara ◽  
Keykavous Parang ◽  
Anil Kumar
Keyword(s):  
Ionic Liquid ◽  
Michael Addition ◽  
Room Temperature ◽  
Significant Loss ◽  
Unsaturated Ketones ◽  
Ability To Act ◽  
Solvent Free Conditions ◽  
Active Methylene Compounds ◽  
Active Methylene ◽  
The Michael Addition

A novel ionic-liquid-supported 1,5,7-triazabicyclo[4.4.0]dec-5-ene (IL–TBD) was synthesized and investigated for its ability to act as an active organocatalyst in the Michael addition of active methylene compounds and thiophenols to chalcones under solvent-free conditions. The IL–TBD afforded Michael addition products in excellent yields (82%–94%) at room temperature, and it was simply recycled and reused at least five times without significant loss of catalytic activity.

A Mild, Efficient, and Green Procedure for Michael Addition of Active Methylene Compounds to Chalcones Under Microwave Irradiation

2005 ◽  
Vol 35 (2) ◽  
pp. 325-332 ◽  
Author(s):  
Satya Paul ◽  
Monika Gupta ◽  
Parvinder Pal Singh ◽  
Rajive Gupta ◽  
André Loupy
Keyword(s):  
Microwave Irradiation ◽  
Michael Addition ◽  
Active Methylene Compounds ◽  
Green Procedure ◽  
Active Methylene

On-water magnetic NiFe2O4 nanoparticle-catalyzed Michael additions of active methylene compounds, aromatic/aliphatic amines, alcohols and thiols to conjugated alkenes

RSC Advances ◽  
2016 ◽  
Vol 6 (98) ◽  
pp. 95951-95956 ◽  
Author(s):  
Soumen Payra ◽  
Arijit Saha ◽  
Subhash Banerjee
Keyword(s):  
Michael Addition ◽  
Aliphatic Amines ◽  
Reusable Catalyst ◽  
Michael Additions ◽  
Active Methylene Compounds ◽  
Active Methylene

Here, we have demonstrated Michael addition of active methylene compounds, aromatic/aliphatic amines, thiols and alcohols to conjugated alkenes using magnetic nano-NiFe2O4 as reusable catalyst in water.

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