一种使用 Fe 3 O 4 @SiO 2 -imid-PMA合成 2 H -吲唑并[2,1- b ]酞嗪三酮和 1 H -吡唑并[1,2- b ]酞嗪二酮的实用绿色方法n描述了纳米粒子作为一种环保磁性催化剂,来自邻苯二甲酸酐、氢氧化肼、1,3-二酮和醛的四组分缩合、无溶剂反应,在室温下进行热或超声辐照。这种新方法具有显着的优点,例如操作简单、产率高、反应时间短以及没有任何繁琐的后处理或纯化。此外,催化剂的热稳定性、易于制备和分离使其成为一种良好的多相体系,是其他多相催化剂的有用替代品。此外,催化剂可以很容易地通过磁场回收并重复使用八个连续的反应循环而不会显着损失活性。
Solvent-free sonochemical one-pot three-component synthesis of 2H-indazolo[2,1-b]phthalazine-1,6,11-triones and 1H-pyrazolo[1,2-b]phthalazine-5,10-diones
作者:Gaurav Shukla、Rajiv K. Verma、Girijesh K. Verma、Maya Shankar Singh
DOI:10.1016/j.tetlet.2011.10.136
日期:2011.12
A rapid and efficient one-potthree-component protocol for the synthesis of 2H-indazolo[2,1-b]phthalazine-1,6,11-triones 4 and 1H-pyrazolo[1,2-b]phthalazine-5,10-diones 6 has been developed by domino coupling of phthalhydrazide, 1,3-diketones, and aldehydes under solvent-free conditions at 80 °C as well as under solvent-free ultrasound irradiation at room temperature promoted by (S)-camphorsulfonic
一种快速高效的一锅三组分规程,用于合成2 H-吲唑并[2,1- b ]邻苯并-1,6,11-三酮4和1 H-吡唑并[1,2- b ]邻苯并-通过在80°C下无溶剂条件下以及(S)促进的室温下在无溶剂超声辐照下,将邻苯二甲酰肼,1,3-二酮和醛进行多米诺偶联,开发了5,10-二酮6。樟脑磺酸。
Lewis acid free synthesis of 3,4-dihydro-1H-indazolo[1,2-b]phthalazine-1,6,11(2H,13H)-triones promoted by 1,1,1,3,3,3-hexafluoro-2-propanol
A convenient, environmentally friendly and efficient procedure for the synthesis 3,4-dihydro-1H-indazolo[1,2-b]phthalazine-1,6,11(2H,13H)-trione derivatives has been developed via multi-component and one-pot reactions of various aldehydes with cyclic 1,3-diketones and phthalhydrazide 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP). In simple and mild reaction conditions, the use of HFIP is explored as an easy workup and a green catalyst for the one-pot three-component synthesis of 3,4-dihydro-1H-indazolo[1,2-b]phthalazine-1,6,11(2H,13H)-triones. Thus, this practical method is developed as a notable medium for these derivatives via a multicomponent reaction.
β-Cyclodextrine-SO3H: the most efficient catalyst for one-pot synthesis of 2H-indazolo[2,1-b]phthalazine-triones under solvent-free conditions
作者:Amol B. Atar、Sang Dong Lee、Byung Gwon Cho、Dae Won Cho、Yeon Tae Jeong
DOI:10.1007/s11164-015-2113-3
日期:2016.3
Abstract An environmentally benign and efficient method has been developed for the synthesis of a series of 2H-indazolo[2,1-b]phthalazine-triones derivatives with β-cyclodextrine-SO3H as a recyclable catalyst by simply combining of various aldehydes with cyclic 1,3-diketones and phthalhydrazide under solvent free condition. The advantageous features of this methodology are high atom-economy, operational
Preparation, characterization and catalytic activity of dendrimer-encapsulated phosphotungstic acid nanoparticles immobilized on nanosilica for the synthesis of 2H-indazolo[2,1-b]phthalazine-triones under solvent-free or sonochemical conditions
In this paper, we adopt a facile method to prepare a type of porous silica nanoparticles (n-SiO2) from tetraethyl orthosilicate as the source of silica. Then, dendritic polymer supported on nanosilica with surface amino groups was fabricated. Finally, H3PW12O40 nanoparticles (PWAn) were synthesized by the treatment of H3PW12O40 powder with n-Octane as solvent by a solvothermal method and then immobilized onto the dendrimer polymer functionalized nanosilica. The synthesized nanostructures were characterized by fourier transform infrared (FT-IR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), dynamic light scattering (DLS), N2 adsorption–desorption isotherm analysis, UV–Vis and elemental analysis. The morphology of the catalyst was characterized using transmission electron microscopes (TEM). The acidity of the catalyst was determined by FTIR pyridine adsorption spectroscopy. Then, this catalytic system was used as an efficient catalyst for the synthesis of 2H-indazolo[2,1-b]phthalazine-triones via multi-component and one-pot reactions of various aldehydes, phthalic anhydride, hydrazinium hydroxide, and dimedone under thermal solvent-free conditions or ultrasound irradiation at room temperature. Also, the catalyst can be easily recovered and reused for six consecutive reaction cycles without significant loss of activity.
Ultrasound-promoted catalyst-free one-pot four component synthesis of 2H-indazolo[2,1-b]phthalazine-triones in neutral ionic liquid 1-butyl-3-methylimidazolium bromide
作者:Mohsen Shekouhy、Alireza Hasaninejad
DOI:10.1016/j.ultsonch.2011.07.011
日期:2012.3
A catalyst-free one-pot four component methodology for the synthesis of 2H-indazolo[2,1-b]phthalazine-triones under ultrasonic irradiation at room temperature using 1-butyl-3-methylimidazolium bromide, [Bmim]Br, as a neutral reaction medium is described. A broad range of structurally diverse aldehydes (aromatic aldehydes bearing electron withdrawing and/or electron releasing groups as well as heteroaromatic