特定任务的离子型液体,[BMIM] OH,已被用于为1的有效合成ħ -吡唑并[1,2- b ]酞嗪-5,10-二酮通过邻苯二甲酰的一锅反应环化缩合,芳族醛,微波辐射下的丙二腈或氰基乙酸乙酯。该方法的优点包括使用绿色催化剂,不使用有机溶剂,易于后处理和优异的收率。首次研究了一些1 H-吡唑并[1,2 - b ]酞嗪-5,10-二酮衍生物的光物理性质。
A Rapid and an Efficient Route to the One-pot, Multicomponent Synthesis of 1<i>H</i>-Pyrazolo[1,2-<i>b</i>]phthalazine-5,10-dione Ring Systems
作者:Mazaahir Kidwai、Ritika Chauhan
DOI:10.1002/jhet.1809
日期:2014.11
CAN is found to be an efficient catalyst for the synthesis of 1H‐pyrazolo[1,2‐b]phthalazine‐5,10‐dione derivatives via one‐pot coupling reaction of phthalhydrazide, aromatic aldehydes, and malononitrile or ethyl cyanoacetate in PEG as solvent. The major attributes of this synthetic protocol are the use of nontoxic, inexpensive, and readily available catalyst, mild conditions, easy work up, improved
CAN是通过邻苯二甲酰肼,芳族醛,丙二腈或氰基乙酸乙酯在PEG中的一锅偶联反应合成1 H-吡唑并[1,2 - b ]酞嗪-5,10-二酮衍生物的有效催化剂作为溶剂。该合成方案的主要属性是使用无毒,廉价且易于获得的催化剂,温和的条件,易于后处理,提高的收率,以及PEG 400作为对环境无害且可回收的溶剂。
Ultrasound-assisted one-pot, three-component synthesis of 1H-pyrazolo[1,2-b]phthalazine-5,10-diones
Triethylamine was found to be an efficientcatalyst for the synthesis of 1H-pyrazolo[1,2-b]phthalazine-5,10-diones by one-pot reaction of phthalhydrazide, aromatic aldehydes, and malononitrile or ethyl cyanoacetate in ethanol under ultrasonic irradiation. The advantages of this method are the use of an inexpensive and readily available catalyst, easy workup, improved yields, and the use of ethanol
Two Novel Pyrazole Derived Ionic Liquids Based on Chloride and Trichlorostannate Anions: Preparation, Characterization, and Evaluation of Their Catalytic Activity in the Synthesis of 1H-Pyrazolo[1,2-b]phthalazine-5,10-diones
disulfonic acidfunctionalized ionic liquids derived from 3,5-dimethyl-1H-pyrazole consisting of chloride and trichlorostannate anions, 3,5-dimethyl-1,2-disulfonic acid-1H-pyrazolium chloride and 3,5-dimethyl-1,2-disulfonic acid-1H-pyrazolium trichlorostannate, have been synthesized, characterized and evaluated for their catalytic efficiency in the synthesis of 1H-pyrazolo[1,2-b]phthalazine-5,10-diones by
摘要 由氯和三氯锡酸根阴离子,3,5-二甲基-1,2-二磺酸-1 H-吡唑鎓氯化物和3,3,5-二甲基-1 H-吡唑衍生的两种新型室温二磺酸官能化离子液体。合成,表征和评价了5-二甲基1,2-二磺酸-1 H-吡唑鎓三氯锡酸酯在合成1 H-吡唑并[1,2 - b ]邻苯并嗪-5,10-二酮中的催化效率在无溶剂条件下通过邻苯二甲酰肼,芳族醛与丙二腈或氰基乙酸乙酯的一锅三组分反应进行反应。结果表明,这些含有酸性SO 3的新型离子液体具有很高的催化活性。H基团在短的反应时间内产生高产率的所需产物。离子液体可以使用至少四次,而催化活性不会明显降低。
An Efficient One-Pot Synthesis of 1<i>H</i>-Pyrazolo[1,2-<i>b</i>]phthalazine-5,10-dione Derivatives
An efficient, three-component, one-pot condensation reaction between phthalhydrazide, aromatic aldehydes, and malononitrile or ethyl cyanoacetate for the synthesis of 1 H-pyrazolo[1,2- B]phthalazine-5,10-dionederivatives in excellent yields is reported.
An efficient and high-yielding one-pot synthesis of 1H-pyrazolo[1,2-b]phthalazine-5,10-diones catalyzed by sodium hydrogen carbonate under solvent-free conditions
Sodium hydrogen carbonate, NaHCO 3 , efficientlycatalyzes the one-pot, three-component reaction of phthalhydrazide, an aromatic aldehyde, and malononitrile or ethyl cyanoacetate under solvent-free conditions, to afford the corresponding 1H-pyrazolo[1,2-b]phthalazine-5,10-diones in high yields. Easy work up, inexpensive and readily available catalyst and avoiding the use of harmful organic solvents