95065-61-5Relevant academic research and scientific papers
Application of group v polyoxometalate as an efficient base catalyst: A case study of decaniobate clusters
Hayashi, Shun,Yamazoe, Seiji,Koyasu, Kiichirou,Tsukuda, Tatsuya
, p. 16239 - 16242 (2016/02/20)
The base catalytic activity of the decaniobate cluster (TMA)6[Nb10O28]·6H2O (TMA+ = tetramethylammonium cation) was studied theoretically and experimentally. Density functional theory calculations showed that the oxygen atoms in the cluster are highly negatively charged and suggested the possibility that the cluster can act as a base catalyst. We demonstrated for the first time that [Nb10O28]6- actually exhibits base catalytic activity for aldol-type condensation reactions including Knoevenagel and Claisen-Schmidt condensation reactions. The catalytic reactions proceeded under ambient conditions, suggesting that [Nb10O28]6- holds promise as a practical strong base catalyst.
Choline chloride and urea based eutectic solvents: Effective catalytic systems for the Knoevenagel condensation reactions of substituted acetonitriles
Liu, Shuo,Ni, Yuxiang,Wei, Wenjing,Qiu, Fangli,Xu, Songlin,Ying, Anguo
, p. 186 - 188 (2014/04/17)
The Knoevenagel condensation of aromatic aldehydes with active methylene compounds such as malononitrile, ethyl cyanoacetate, benzimidazole-2- acetonitrile and benzothiazole-2-acetonitrile proceeded very smoothly, in a reusable and cheap choline chloride and urea based deep eutectic solvents. Both reaction time and yield are satisfactory. The advantages of this catalyst are that it is readily available, biodegradable, non-toxic, low cost and is recyclable.
