Umpolung of α,β-unsaturated aldehydes by electrogenerated NHCs in ionic liquids: Synthesis of γ-butyrolactones

2011 ◽  
Vol 13 (7) ◽  
pp. 738-741 ◽  
Author(s):  
Monica Orsini ◽  
Isabella Chiarotto ◽  
Michelle M.M. Feeney ◽  
Marta Feroci ◽  
Giovanni Sotgiu ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Unsaturated Aldehydes

scholarly journals Ionic Liquids as Precatalysts in the Highly Stereoselective Conjugate Addition of α,β-Unsaturated Aldehydes to Chalcones

2014 ◽  
Vol 20 (43) ◽  
pp. 13889-13893 ◽  
Author(s):  
Linda Ta ◽  
Anton Axelsson ◽  
Joachim Bijl ◽  
Matti Haukka ◽  
Henrik Sundén
Keyword(s):  
Ionic Liquids ◽  
Conjugate Addition ◽  
Unsaturated Aldehydes

Assessment of non-standard reaction conditions for asymmetric 1,3-dipolar organocatalytic cycloaddition of nitrone with α,β-unsaturated aldehydes

2015 ◽  
Vol 69 (5) ◽  
Author(s):  
Melinda Mojzesová ◽  
Mária Mečiarová ◽  
Ambroz Almássy ◽  
Roger Marti ◽  
Radovan Šebesta
Keyword(s):  
Ionic Liquids ◽  
Flow Reactor ◽  
Dipolar Cycloaddition ◽  
Reaction Conditions ◽  
Experimental Conditions ◽  
Flow Process ◽  
Unsaturated Aldehydes ◽  
Solvent Free Conditions ◽  
Standard Reaction ◽  
Organocatalytic Reactions

AbstractNon-standard experimental conditions can often enhance organocatalytic reactions considerably. The current study explores the effectiveness of a range of non-standard reaction conditions for the asymmetric organocatalytic 1,3-dipolar cycloaddition of a nitrone with α,β-unsaturated aldehydes. The influence of ionic liquids, high-pressure conditions, ultrasound, microwave irradiation and ballmilling was tested as well as the flow process. Because of the low reactivity of the nitrone and unsaturated aldehydes in the 1,3-dipolar cycloaddition, cycloadducts were isolated in only moderate yields from the majority of experiments. However, high diastereo- and enantioselectivities were observed in ionic liquids under solvent-free conditions and in the flow reactor.

Reactions of CH-acids with  , -unsaturated aldehydes in ionic liquids

2004 ◽  
Vol 53 (3) ◽  
pp. 647-651 ◽  
Author(s):  
G. V. Kryshtal ◽  
G. M. Zhdankina ◽  
I. V. Astakhova ◽  
S. G. Zlotin
Keyword(s):  
Ionic Liquids ◽  
Ch Acids ◽  
Unsaturated Aldehydes

scholarly journals Cover Picture: Highly Selective Reduction of α, β ‐Unsaturated Aldehydes and Ketones under Ambient Conditions using Tetraalkylphosphonium‐based Ionic Liquids (42/2018)

2018 ◽  
Vol 3 (42) ◽  
pp. 11705-11705
Author(s):  
Kathryn Ralphs ◽  
Éadaoin McCourt ◽  
Christopher Ormandy ◽  
Thiago A. Carneiro de Souza ◽  
Peter Nockemann ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Selective Reduction ◽  
Ambient Conditions ◽  
Unsaturated Aldehydes ◽  
Aldehydes And Ketones

scholarly journals Highly Selective Reduction of α, β ‐Unsaturated Aldehydes and Ketones under Ambient Conditions using Tetraalkylphosphonium‐based Ionic Liquids

2018 ◽  
Vol 3 (42) ◽  
pp. 11706-11711 ◽  
Author(s):  
Kathryn Ralphs ◽  
Éadaoin McCourt ◽  
Christopher Ormandy ◽  
Thiago A. Carneiro de Souza ◽  
Peter Nockemann ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Selective Reduction ◽  
Ambient Conditions ◽  
Unsaturated Aldehydes ◽  
Aldehydes And Ketones

Reactions of CH-Acids with ?,?-Unsaturated Aldehydes in Ionic Liquids.

ChemInform ◽  
2005 ◽  
Vol 36 (2) ◽  
Author(s):  
G. V. Kryshtal ◽  
G. M. Zhdankina ◽  
I. V. Astakhova ◽  
S. G. Zlotin
Keyword(s):  
Ionic Liquids ◽  
Ch Acids ◽  
Unsaturated Aldehydes

ChemInform Abstract: Ionic Liquids as Precatalysts in the Highly Stereoselective Conjugate Addition of α,β-Unsaturated Aldehydes to Chalcones.

ChemInform ◽  
2015 ◽  
Vol 46 (15) ◽  
pp. no-no
Author(s):  
Linda Ta ◽  
Anton Axelsson ◽  
Joachim Bijl ◽  
Matti Haukka ◽  
Henrik Sunden
Keyword(s):  
Ionic Liquids ◽  
Conjugate Addition ◽  
Unsaturated Aldehydes

Internal redox amidation of α,β-unsaturated aldehydes in ionic liquids. The electrochemical route

2013 ◽  
Vol 89 ◽  
pp. 692-699 ◽  
Author(s):  
Marta Feroci ◽  
Isabella Chiarotto ◽  
Achille Inesi
Keyword(s):  
Ionic Liquids ◽  
Unsaturated Aldehydes

Synthesis of Phenylsubstituted 2H,5H-Pyrano[ 4,3-b] pyran-5-ones and Related Heterocycles via a Domino Knoevenagel Condensation/ 6π-Electron Electrocyclization of 4-Hydroxy-6-phenyl-2H-pyran-2-one with Cyclic and Acyclic α, β-Unsaturated Aldehydes under Different Conditions Synthesis and Crystal Structure of the High-pressure Iron Borate β-FeB2O4 Synthesis and Crystal Structure of the High-pressure Iron Borate β-FeB2O4 Synthesis and Crystal Structure of the High-pressure Iron Borate β-FeB2O4 Synthesis and Crystal Structure of the High-pressure Iron Borate β-FeB2O4 Synthesis and Crystal Structure of the High-pressure Iron Borate β-FeB2O4

2009 ◽  
Vol 64 (8) ◽  
pp. 1-10 ◽  
Author(s):  
Heiko Leutbecher ◽  
Sylvia Rieg ◽  
Jürgen Conrad ◽  
Sabine Mika ◽  
Iris Klaiber ◽  
...  
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Ionic Liquids ◽  
Knoevenagel Condensation ◽  
Single Step ◽  
Iron Borate ◽  
Reaction Conditions ◽  
Synthesis And Crystal Structure ◽  
Unsaturated Aldehydes

A range of new 7-phenyl-2H,5H-pyrano[4,3-b]pyran-5-ones and related tricyclic heterocycles was prepared in a single step by means of a domino Knoevenagel condensation/6π-electron electrocyclization under different reaction conditions, including thermal and microwave conditions. The influence of several ionic liquids as solvents was also studied

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