Hierarchical K/LTL zeolites: Synthesis by alkali treatment, characterization and catalytic performance in Knoevenagel condensation reaction

2016 ◽  
Vol 40 ◽  
pp. 128-136 ◽  
Author(s):  
Nilesh P. Tangale ◽  
Shilpa K. Sonar ◽  
Prashant S. Niphadkar ◽  
Praphulla N. Joshi
Keyword(s):  
Knoevenagel Condensation ◽  
Alkali Treatment ◽  
Condensation Reaction ◽  
Catalytic Performance ◽  
Knoevenagel Condensation Reaction

Selenotungstates incorporating organophosphonate ligands and metal ions: synthesis, characterization, magnetism and catalytic efficiency in the Knoevenagel condensation reaction

2020 ◽  
Vol 49 (22) ◽  
pp. 7420-7425 ◽  
Author(s):  
Hui Kong ◽  
Peipei He ◽  
Zongfei Yang ◽  
Qiaofei Xu ◽  
Jiawei Wang ◽  
...  
Keyword(s):  
Metal Ions ◽  
Knoevenagel Condensation ◽  
Condensation Reaction ◽  
Ethyl Cyanoacetate ◽  
Catalytic Efficiency ◽  
Catalytic Performance ◽  
Mild Conditions ◽  
Sandwich Type ◽  
Knoevenagel Condensation Reaction

Three new sandwich-type selenotungstate anion structures and Co1 show superior catalytic performance in the Knoevenagel condensation of benzaldehyde and ethyl cyanoacetate under mild conditions.

Synthesis of β- and β,β-substituted Morita–Baylis–Hillman adducts using a two-step protocol

2012 ◽  
Vol 90 (5) ◽  
pp. 450-463 ◽  
Author(s):  
David I. Magee ◽  
Same Ratshonka ◽  
Jessica McConaghy ◽  
Maggie Hood
Keyword(s):  
Knoevenagel Condensation ◽  
Condensation Reaction ◽  
Facile Synthesis ◽  
Aliphatic Aldehydes ◽  
Tert Butyl ◽  
Keto Esters ◽  
Knoevenagel Condensation Reaction

The synthesis of a large number of β- and β,β-substituted keto esters was successful by the use of the Knoevenagel condensation reaction. The stereoselectivity of these reactions was improved by alteration of various substituent groups. Although there were few examples of complete Z selectivity, the use of tert-butyl acetoacetate with either aromatic or aliphatic aldehydes afforded Z selectivity. The selective reductions of these substituted keto esters was successfully achieved by using a combination of NaBH4 and CeCl3·7H2O or Yb(OTf)3, which allowed a facile synthesis of a large number of stereochemically pure substituted Morita–Baylis–Hillman adducts, including β,β-substituted adducts.

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