通过邻苯二甲酰肼,醛与5,5-二甲基环己烷-1,3-二酮的反应,在无溶剂条件下完成了2H-吲唑并[2,1 - b ]邻苯二甲酰基三酮的高效,快速和绿色合成。这种方法利用了微波辐射和蒙脱石K-10组合的合成潜力,并提供了许多优势,例如出色的产品收率,更短的反应时间,可重复使用的催化剂,易于分离的产品以及对环境无害的反应条件。
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。
Solvent-free, sonochemical, one-pot, four-component synthesis of 2H-indazolo[2,1-b]phthalazine-triones and 1H-pyrazolo[1,2-b]phthalazine-diones catalyzed by Fe3O4@SiO2-imid-PMAn magnetic nanoparticles
A practical and green method for the synthesis of 2H-indazolo[2,1-b]phthalazine-triones and 1H-pyrazolo[1,2-b]phthalazine-diones using Fe3O4@SiO2-imid-PMAn nanoparticles as an eco-friendly magnetic catalyst from the four-component condensation, solvent-free reaction of phthalic anhydride, hydrazinium hydroxide, 1,3-diketones, and aldehydes under thermal or ultrasound irradiation at room temperature
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。
A highly efficient and recyclable cobalt ferrite chitosan sulfonic acid magnetic nanoparticle for one-pot, four-component synthesis of 2H-indazolo[2,1-b]phthalazine-triones
A highlyefficientmagnetic CoFe2O4 chitosan sulfonic acid nanoparticle (CoFe2O4-CS-SO3H) was prepared and applied for one-pot, four-component synthesis of 2H-indazolo[2,1-b]phthalazine-triones by condensation of phthalic anhydride, hydrazinium hydroxide, 1,3-cyclohexanedione and aldehydes under solvent-free conditions at 80 °C. The magneticnanocatalyst could be readily recovered by applying an external
制备了高效的磁性CoFe 2 O 4壳聚糖磺酸纳米粒子(CoFe 2 O 4 -CS-SO 3 H),并将其用于一锅四组分合成2 H-吲唑并[ 2,1- b ]邻苯二嗪在80°C无溶剂条件下,通过邻苯二甲酸酐,氢氧化肼,1,3-环己二酮和醛的缩合反应生成三酮。通过施加外部磁体可以容易地回收磁性纳米催化剂,并循环几次,而不会显着降低其催化活性。
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.
Nano-ferrite supported glutathione as a reusable nano-organocatalyst for the synthesis of phthalazine-trione and dione derivatives under solvent-free conditions
作者:Binoyargha Dam、Mithu Saha、Ramen Jamatia、Amarta Kumar Pal
DOI:10.1039/c6ra06376d
日期:——
time from easily accessible starting materials under solvent-free conditions. This methodology showed very good substrate scope and high degree of tolerance for a variety of aldehydes (including aliphatic and heteroaromatic aldehydes) and activemethylenecompounds. Moreover, the catalyst can be easily separated from the reaction mixture because of its highly paramagnetic nature, by using an external