Choline chloride based eutectic solvent for the efficient synthesis of 2-amino-4<i>H</i>-chromen-4-yl phosphonate derivatives via multicomponent reaction under mild conditions
ABSTRACT Synthesis of 2-amino-4H-chromen-4-ylphosphonate derivatives has been accomplished by the one-pot three-component reaction of salicylaldehyde, malononitrile/ethylcyanoacetate and dialkyl phosphites in the presence of reusable deep eutectic solvent (DES) undermildconditions. The advantages of this method are mildreactionconditions, simple work-up procedure, use of DES as a green solvent
摘要 水杨醛、丙二腈/氰基乙酸乙酯和亚磷酸二烷基酯在温和条件下,在可重复使用的低共熔溶剂 (DES) 存在下,通过一锅三组分反应合成了 2-氨基-4H-色烯-4-基膦酸酯衍生物. 该方法的优点是反应条件温和,后处理程序简单,使用 DES 作为绿色溶剂,是制备重要的生物活性含磷化合物的经济方案。图形概要
Highly efficient I<sub>2</sub> capture by simple and low-cost deep eutectic solvents
作者:Guofeng Li、Chuanyu Yan、Bobo Cao、Jingyun Jiang、Wancheng Zhao、Jinfang Wang、Tiancheng Mu
DOI:10.1039/c5gc02691a
日期:——
The efficient removal and storage of radioactive nuclear contaminants of iodine has been realized by deep eutectic solvents (DESs) due to the formation of halogen bonding (XB).
Oxovanadium phosphate catalyst, and preparation method and application therefor
申请人:INSTITUTE OF PROCESS ENGINEERING, CHINESE ACADEMY OF SCIENCES
公开号:US11123718B2
公开(公告)日:2021-09-21
Provided are an oxovanadium phosphate catalyst, and a preparation method and an application therefor. The method includes: 1) mixing and reacting a vanadium source, a choline chloride-organic carboxylic acid eutectic solvent, and alcohol; 2) mixing the obtained reaction product with a phosphorus source, raising the temperature to a temperature higher than the melting point of the eutectic solvent, and continuing the reaction to obtain an oxovanadium phosphate precursor; and 3) calcining to obtain the oxovanadium phosphate catalyst. The alcohol is: benzyl alcohol or a mixture of C3-C8 monohydric alcohol and benzyl alcohol. The present method uses a green and inexpensive eutectic solvent to strengthen the preparation of oxovanadium phosphate catalyst, avoids the disadvantages of the prior art, and overcoming the problems of low yield and poor selectivity when used in a reaction to prepare maleic anhydride by catalytic n-butane selective oxidisation.
[EN] OXOVANADIUM PHOSPHATE CATALYST, AND PREPARATION METHOD AND APPLICATION THEREFOR<br/>[FR] CATALYSEUR À BASE DE PHOSPHATE D'OXOVANADIUM, ET PROCÉDÉ DE PRÉPARATION ET SON APPLICATION<br/>[ZH] 一种磷酸氧钒催化剂、其制备方法及用途
eutectic solvent composed of choline chloride and oxalic acid was prepared. After leaching at 120 °C for 10 hours, the nickeloxalatedihydrate and the filtrate containing other metal elements are separated. Then the filtrate is diluted with water to precipitate the cobalt oxalatedihydrate. Finally, manganese compounds were separated by adjusting pH.