[Hmim][HSO<sub>4</sub>]: An Efficient and Reusable Catalyst for the Synthesis of Spiro[dibenzo[a,i]-xanthene-14,3'-indoline]-2',8,13-triones and Spironaphthopyran[2,3-d]pyrimidine-5,3'-indolines
作者:Xiaojuan Yang、Limin Yang、Liqiang Wu
DOI:10.5012/bkcs.2012.33.2.714
日期:2012.2.20
These activities, combined with diverse chemicalbehavior make quinones attractive targets in organic syn-thesis.The removal of volatile organic solvents in organic reac-tions is the most important goal in green chemistry. One ofthe most efficient protocols to reach this aim is replacementof the volatile solvents with ionic liquids possessing lowvolatility, high thermal stability, non-flammability,
Abstractmagnified image A clean, one‐pot and three‐component synthesis of new spironaphthopyrano[2,3‐d]pyrimidine‐5,3′‐indoline derivatives by cyclo‐condensation reaction of isatins, 2‐naphthol, and barbituric acids in aqueous media is reported. J. Heterocyclic Chem., (2010).
Brunauer-Emmett-Teller (BET) measurements, and potentiometric titration techniques. The reactivity of the prepared nanoparticles was investigated in the synthesis of spiro[benzochromeno[2,3-d]pyrimidin-indolines] through the one-potthree-component condensation of different naphthols, isatin derivatives, and barbituric acids in the in refluxing ethanol successfully. The recovery and reusability of the
摘要 本文通过一种简单的方法将升华的AlCl 3嵌入到纳米二氧化硅-Fe 3 O 4核上,获得了新型AlCl 3 @nano Fe 3 O 4 -SiO 2 。首次采用纳米结构。新合成的固体已通过傅里叶变换红外光谱 (FT-IR)、场发射扫描电子显微镜 (FESEM)、能量色散 X 射线光谱 (EDAX)、振动样品磁力计 (VSM)、透射电子显微镜 (TEM) 进行了表征、X 射线衍射分析 (XRD)、Brunauer-Emmett-Teller (BET) 测量和电位滴定技术。研究了制备的纳米粒子在螺[苯并色烯[2,3- d ]合成中的反应性]嘧啶-二氢吲哚]通过不同的萘酚、靛红衍生物和巴比妥酸在回流乙醇中的一锅三组分缩合成功。纳米结构的回收率和可重复使用性也在 4 次运行中进行了检查,没有活性损失。