Highly efficient Knoevenagel condensation reactions catalyzed by a proline-functionalized polyacrylonitrile fiber

2013 ◽  
Vol 24 (1) ◽  
pp. 52-54 ◽  
Author(s):  
Guo-Wei Li ◽  
Jia Xiao ◽  
Wen-Qin Zhang
Keyword(s):  
Knoevenagel Condensation ◽  
Polyacrylonitrile Fiber ◽  
Condensation Reactions ◽  
Highly Efficient

Polyguanidine as a Highly Efficient and Reusable Catalyst for Knoevenagel Condensation Reactions in Water

2013 ◽  
Vol 66 (4) ◽  
pp. 500 ◽  
Author(s):  
Xian-Liang Zhao ◽  
Ke-Fang Yang ◽  
Xuan-Gan Liu ◽  
Chun-Lin Ye ◽  
Li-Wen Xu ◽  
...  
Keyword(s):  
Knoevenagel Condensation ◽  
Knoevenagel Reaction ◽  
Reusable Catalyst ◽  
Efficient Catalyst ◽  
Condensation Reactions ◽  
Highly Efficient ◽  
Wide Range ◽  
Active Methylene Compounds ◽  
Simple Filtration ◽  
Active Methylene

Polyguanidine is used as a novel and highly efficient catalyst in the Knoevenagel reaction of aldehydes with active methylene compounds in water to afford substituted electrophilic alkenes. This method is applicable for a wide range of aldehydes including aromatic and heterocyclic substrates. The polyguanidine catalyst can be recovered by simple filtration and reused many times for the aqueous Knoevenagel reaction without loss of activity.

Knoevenagel Condensation Reactions of Cyano Malononitrile-Derivatives Under Microwave Radiation

2018 ◽  
Vol 22 (6) ◽  
pp. 519-532 ◽  
Author(s):  
Lucas Lima Zanin ◽  
David Esteban Quintero Jimenez ◽  
Luis Pina Fonseca ◽  
Andre Luiz Meleiro Porto
Keyword(s):  
Microwave Radiation ◽  
Knoevenagel Condensation ◽  
Condensation Reactions

Dithienosilole extended BODIPYs: Synthesis and spectroscopic properties

2019 ◽  
Vol 23 (06) ◽  
pp. 664-670 ◽  
Author(s):  
Yijuan Sun ◽  
Lizhi Gai ◽  
Yitong Wang ◽  
Zhirong Qu ◽  
Hua Lu
Keyword(s):  
Absorption Coefficient ◽  
Dft Calculations ◽  
Knoevenagel Condensation ◽  
Spectroscopic Properties ◽  
Condensation Reactions ◽  
Spectral Bands ◽  
Spectral Shifts ◽  
Td Dft

3,/3,5-Dithienosilole-vinyl-BODIPYs were readily synthesized through Knoevenagel condensation reactions. Spectroscopic properties of two dyes in various solvents were investigated. Dyes 1 and 2 show an absorption maxima at 620 and 738 nm with absorption coefficient of 60900 and 77900 [Formula: see text] cm[Formula: see text] in DCM, respectively. Significant red shifts of the main spectral bands are observed relative to that of the parent 1,3,5,7-tetramethyl-BODIPY. TD-DFT calculations reproduce the spectral shifts and experimental spectra.

Fluorous bispidine: a bifunctional reagent for copper-catalyzed oxidation and knoevenagel condensation reactions in water

RSC Advances ◽  
2015 ◽  
Vol 5 (99) ◽  
pp. 81415-81428 ◽  
Author(s):  
Wei Jie Ang ◽  
Yong Sheng Chng ◽  
Yulin Lam
Keyword(s):  
Knoevenagel Condensation ◽  
Aerobic Oxidation ◽  
Mild Conditions ◽  
Condensation Reactions ◽  
Catalyzed Oxidation

Fluorous bispidine-type ligands have been developed to demonstrate its bifunctional property as a ligand and base in copper-catalyzed aerobic oxidation, the Knoevenagel condensation and tandem oxidation/condensation in water under mild conditions.

Sign in / Sign up

Export Citation Format

Share Document