scholarly journals Enantioselective direct aldol reaction of α-keto esters catalyzed by (Sa)-binam-d-prolinamide under quasi solvent-free conditions

2012 ◽  
Vol 10 (20) ◽  
pp. 4029 ◽  
Author(s):  
Santiago F. Viózquez ◽  
Abraham Bañón-Caballero ◽  
Gabriela Guillena ◽  
Carmen Nájera ◽  
Enrique Gómez-Bengoa
Keyword(s):  
Aldol Reaction ◽  
Solvent Free ◽  
Keto Esters ◽  
Direct Aldol Reaction ◽  
Solvent Free Conditions

ChemInform Abstract: Enantioselective Direct Aldol Reaction of α-Keto Esters Catalyzed by (Sa)-Binam-D-prolinamide under Quasi Solvent-Free Conditions.

ChemInform ◽  
2012 ◽  
Vol 43 (42) ◽  
pp. no-no
Author(s):  
Santiago F. Viozquez ◽  
Abraham Banon-Caballero ◽  
Gabriela Guillena ◽  
Carmen Najera ◽  
Enrique Gomez-Bengoa
Keyword(s):  
Aldol Reaction ◽  
Solvent Free ◽  
Keto Esters ◽  
Direct Aldol Reaction ◽  
Solvent Free Conditions

The smallest organocatalyst in highly enantioselective direct aldol reaction in wet solvent-free conditions

RSC Advances ◽  
2014 ◽  
Vol 4 (46) ◽  
pp. 24311-24315 ◽  
Author(s):  
Sudipto Bhowmick ◽  
Sunita S. Kunte ◽  
Kartick C. Bhowmick
Keyword(s):  
Amino Acid ◽  
Room Temperature ◽  
Aldol Reaction ◽  
Aromatic Aldehydes ◽  
Solvent Free ◽  
Natural Amino Acid ◽  
Asymmetric Aldol ◽  
Direct Aldol Reaction ◽  
Solvent Free Conditions ◽  
Asymmetric Aldol Reaction

The catalytic efficacy of the smallest organocatalyst, l-proline hydrazide, prepared from a cheaply available natural amino acid, such as l-proline, was studied for the direct asymmetric aldol reaction of various ketones with aromatic aldehydes at room temperature in the presence of several acid additives.

Fast, solvent-free and highly enantioselective fluorination of β-keto esters catalyzed by chiral copper complexes in a ball mill

2017 ◽  
Vol 19 (7) ◽  
pp. 1674-1677 ◽  
Author(s):  
Yifeng Wang ◽  
Haojiang Wang ◽  
Yidong Jiang ◽  
Cheng Zhang ◽  
Juanjuan Shao ◽  
...  
Keyword(s):  
Ball Mill ◽  
Copper Complexes ◽  
Solvent Free ◽  
Planetary Ball Mill ◽  
Keto Esters ◽  
Solvent Free Conditions

A fast and highly enantioselective fluorination of β-keto esters catalyzed by diphenylamine linked bis(oxazoline)-Cu(OTf)2 complexes under solvent-free conditions has been developed using a planetary ball mill.

scholarly journals Barium Dichloride as a Powerful and Inexpensive Catalyst for the Pechmann Condensation without Using Solvent

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Saeed Khodabakhshi
Keyword(s):  
Green Chemistry ◽  
Organic Solvents ◽  
Condensation Reaction ◽  
Reaction Times ◽  
Solvent Free ◽  
Coumarin Derivatives ◽  
Inexpensive Method ◽  
Keto Esters ◽  
Pechmann Condensation ◽  
Solvent Free Conditions

Various coumarin derivatives have been efficiently synthesized via barium dichloride-catalyzed Pechmann condensation reaction of various phenols and β-keto esters under solvent-free conditions. This novel and inexpensive method has advantages such as short reaction times, excellent product yields, and avoidance of organic solvents in agreement with green chemistry principles.

Organocatalytic direct aldol reaction between acetone and α-substituted β-keto esters

2007 ◽  
Vol 267 (1-2) ◽  
pp. 98-101 ◽  
Author(s):  
Gábor London ◽  
György Szöllősi ◽  
Mihály Bartók
Keyword(s):  
Aldol Reaction ◽  
Keto Esters ◽  
Direct Aldol Reaction

scholarly journals One Pot, Solvent-Free Synthesis of Substituted 3,4-Dihydropyrimidin-2(1H)-Ones/Thiones under Microwave Irradiation (CEM) Using Reusable Nickel Nanoparticles

2015 ◽  
Vol 50 ◽  
pp. 17-25 ◽  
Author(s):  
Mayur K. Vekariya ◽  
Rajesh H. Vekariya ◽  
Nirav N. Barot ◽  
Tauhid A. Shaikh ◽  
Harjinder Kaur ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Nickel Nanoparticles ◽  
Condensation Reaction ◽  
Solvent Free ◽  
High Yield ◽  
One Pot ◽  
Mass Spectral ◽  
Keto Esters ◽  
Aryl Aldehydes ◽  
Solvent Free Conditions

A library of 3,4-dihydropyrimidin-2(1H)-ones/thiones derivatives were synthesized via Biginelli condensation reaction of β-keto esters, aryl aldehydes and urea/thiourea under solvent-free conditions utilizing nickel nanoparticles under microwave irradiation (CEM Discover). The structures of the all compounds were elucidated with the aid of elemental analysis, IR, 1H-NMR and Mass spectral data. Nickel nanoparticles can be recovered and reused five times without loss of their efficiency. Short reaction time, high yield of products and simple workup procedure, solvent-free conditions and reusability of the catalyst are the superior features of this protocol.

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