2169-69-9Relevant articles and documents
Size control of catalytic reaction space by intercalation of alkylcarboxylate anions into Ni-Zn mixed basic salt interlayer: Application for knoevenagel reaction in water
Hara, Takayoshi,Kurihara, Jun,Ichikuni, Nobuyuki,Shimazu, Shogo
, p. 304 - 305 (2010)
The interlayer space of layered Ni-Zn mixed basic salt (NiZn) can be controlled precisely by the intercalation of various carboxylate anions with long alkyl chains via simple anion exchange. Expansion of interlayer space in the anion-exchanged NiZn depend
Nitrogen-containing porous cerium trimetaphosphimate as a new efficient base catalyst
Yi, Jianglong,Fu, Zhiyong,Liao, Shijun,Song, Desheng,Dai, Jingcao
, p. 6144 - 6147 (2011)
A new layer nitrogen-containing porous cerium trimetaphosphimate with pendant NH groups projecting into the channels has been synthesized and characterized. Knoevenagel condensation of benzaldehyde and ethyl cyanoacetate is carried out with this complex a
2-pyrrolidinecarboxylic acid ionic liquid catalyzed knoevenagel condensation
Song, Hongbing,Yu, Yinghao,Chen, Xuewei,Li, Xuehui,Xi, Hongxia
, p. 666 - 669 (2012)
The pyrrolidinecarboxylic functionalized ionic liquid, 1-butyl-3- methylimidazolium-(S)-2-pyrrolidinecarboxylic acid salt ([bmim][Pro]), was prepared using an improved procedure. α,β-Unsaturated carbonyl compounds were selectively synthesized and high yie
Comparison of the alkalinity of hydroxypyridine anion-based protic ionic liquids and their catalytic performance for Knoevenagel reaction: The effect of the type of cation and the position of nitrogen atom of anion
Xie, Bin,Xu, Yingjie,Tang, Xiaochen,Shu, Hegang,Chen, Tingting,Zhu, Xiao
, p. 610 - 616 (2018)
The design of acidity and alkalinity is an important characteristic of ionic liquids, and it also affects their application. For this reason, the alkalinity of six hydroxypyridine anion-based protic ionic liquids (PILs) was determined by potentiometric ti
Synthesis, structure, luminescence and catalytic properties of cadmium(ii) coordination polymers with 9H-carbazole-2,7-dicarboxylic acid
Yi, Xiu-Chun,Huang, Meng-Xuan,Qi, Yan,Gao, En-Qing
, p. 3691 - 3697 (2014)
Two Cd(ii) metal-organic frameworks were synthesized from the NH-functionalized dicarboxylate ligand 9H-carbazole-2,7-dicarboxylic acid (2,7-H2CDC). Compound 1, [Cd4(CDC)4(DMF) 4]·4DMF·4H2O, displays
Ammonium chloride catalyzed Knoevenagel condensation in PEG-400 as ecofriendly solvent
Waghmare, Smita R.
, p. 849 - 855 (2021/09/28)
A simple and selective green methodology has been successfully developed for Knoevenagel condensation in polyethylene glycol-400 using 10 mol % ammonium chloride as catalyst. The method is applicable to a wide range of aromatic, heteroaromatic and α,β-unsaturated aldehydes. The reactions have been found to be clean and free from the formation of the Michael adduct.
Physically mixed catalytic system of amino and sulfo-functional porous organic polymers as efficiently synergistic co-catalysts for one-pot cascade reactions
Bian, Guomin,Huang, Xianpei,Liu, Fuyao,Qi, Yonglin,Sun, Zunming,Yang, Xinlin,Yang, Xinyue,Zhang, Mengmeng,Zhang, Wangqing
, p. 9546 - 9556 (2020/06/17)
In this article, acid/base bi-functional polymeric materials were prepared using physically mixed porous poly(divinylbenzene-co-4-vinylbenzenesulfonic acid) (P(DVB-VBS)) with sulfonic acid groups and poly(divinylbenzene-co-4-vinylbenzyl amine) (P(DVB-VBA)) with amino groups, which were synthesized by solvothermal polymerization of crosslinker DVB with either phenyl 4-vinylbenzenesulfonate (PVBS) or 4-vinylbenzyl amine hydrochloride (VBAH) functional monomers together with subsequent hydrolyzation or alkaline treatment. The bi-functional polymeric materials were utilized as a synergistic catalytic system for one-pot cascade reactions including deacetalization-Henry condensation reaction, deacetalization-Knoevenagel condensation reaction and the transformation of 3,4-dihydropyran derivatives to α-ester cyclohexenone compounds. The crosslinked polymeric frameworks effectively isolated sulfonic acid and primary amine groups to ensure their roles as both acid and base catalyst simultaneously in a one-pot system. The hierarchical porosity of a physically mixed acid/base co-catalyst system provided the possibility for the multi-step transformation of more complex substrates.
