Introduction of O-sulfonated poly(vinylpyrrolidonium) hydrogen sulfate as an efficient, and reusable solid acid catalyst for some solvent-free multicomponent reactions
In this work, O-sulfonated poly(vinylpyrrolidonium) hydrogen sulphate has been prepared as a powerful recyclable solid acid catalyst and characterized using a variety of techniques including elemental analysis, FT-IR, TGA, SEM, XRD, pH analysis and Hammett acidity function.
A simple, efficient, and cost-effective method for the synthesis of 2H-indazolo[2,1-b]phthalazine-1,6,11(13H)-trione derivatives by a one-pot, three-component condensation reaction of phthalazide, dimedone, or 1,3-cyclohexanedione and aromatic aldehydes under CH3CN/DMF (8:2) media at 80°C for 30–60 min in the presence of trimethylsilyl chloride (TMSCl) is described. J. Heterocyclic Chem., (2009).
一种通过一锅三组分缩合反应合成2 H-吲哚并[ 2,1- b ]邻苯二甲酰1,6,11(13 H)-三酮衍生物的简单,高效且经济高效的方法酞嗪,双甲酮,或1,3-环己二酮和芳香醛在CH 3 CN / DMF(8:2)介质中在80°C下存在30-60分钟的条件下描述了三甲基甲硅烷基氯(TMSCl)。J.杂环化学,(2009)。
Novel SO3H-functionalized phenanthrolinum-phosphotungstate ionic liquid for highly promoted three-component synthesis of 2H-indazolo[2,1-b]phthalazine-triones
reaction mixture. These economical factors (time, cost, waste, etc.) for this three-component reaction hold promise for the future of organic synthesis. Graphic abstract In this work we introduced a new efficient Brønsted acidic ionicliquid (BAIL) and then its catalytic activities have been considered in the three-componentsynthesis of 2H-indazolo[2,1-b]phthalazine-triones via the domino Knoevenagel condensation/Michael
摘要 合成了一种新型的基于杂多阴离子的布朗斯台德酸性离子液体材料[PhBS] 3 PW 12 O 40,磷钨酸盐催化剂的丁烷单磺酸官能化的菲咯啉盐(PhBS-PW),并通过FTIR,1 H和13 C NMR进行了很好的表征,电喷雾电离质谱(ESI-MS),EDX和TG分析技术。新制备的催化剂用于在H 2中通过芳族醛,二甲酮和邻苯二甲酰肼之间的三组分缩合反应有效地一锅合成2 H-吲哚并[ 2,1 - b ]邻苯二嗪-三酮衍生物。O在热条件下。这种绿色方法具有许多优势,例如反应时间短,反应曲线干净,实验和后处理程序简单。而且,该催化剂可以容易地回收和重复使用至少九次,而其催化活性仅稍有降低,而没有催化剂量的浸出到反应混合物中。三组分反应的这些经济因素(时间,成本,浪费等)为有机合成的未来提供了希望。 图形摘要 在这项工作中,我们引入了一种新型的高效布朗斯台德酸性离子液体(BAIL),然后通过多
Synthesis of 1<i>H</i>-indazolo[2,1-b]phthalazine-triones catalysed by proline triflate under solvent-free conditions
作者:Xiangjun Shi、Jia Li、Weihui Zhong、Jianjun Li
DOI:10.3184/174751912x13251821462738
日期:2012.1
An efficient procedure has been developed for the synthesis of 1H-indazolo[2,1-b]phthalazine-triones by the one-pot condensation of cyclohexane-1,3-dione, aromatic aldehydes and phthalhydrazides catalysed by proline triflateundersolvent-freeconditions. The reaction proceeds in good to excellent yields.
Introduction of a Novel Nano Sized <i>N</i>-Sulfonated Brönsted Acidic Homogeneous Catalyst for the Promotion of the Synthesis of 2<i>H</i>-Indazolo[2,1-<i>b</i>]Phthalazine-1,6,11(13<i>H</i>)-Triones
In this research work, 4,4'-(butane-1,4-diyl) bis(1-sulfo-1,4-diazabicyclo[2.2.2]octane-1,4-diium) tetrachloride (NS-C4(DABCO-SO3H)(2)center dot 4Cl) as a new nano-sized N-sulfonic acid was prepared and characterized using different types of spectroscopic methods including FT-IR, H-1 NMR, C-13 NMR, XRD, TGA and SEM analysis. This new reagent was efficiently used as catalyst for the promotion of the one-pot synthesis of 2H-indazolo[2,1-b] phthalazine-1,6,11(13H)-triones derivatives, as a class of biologically active compounds with important pharmaceutical properties, under solvent-free conditions during short reaction times in high yields.