Ionic liquid triethylamine-bonded sulfonic acid {[Et3N–SO3H]Cl} as a novel, highly efficient and homogeneous catalyst for the synthesis of β-acetamido ketones, 1,8-dioxo-octahydroxanthenes and 14-aryl-14H-dibenzo[a,j]xanthenes
the synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes from β-naphthol (2 equiv.) and aldehydes (1 equiv.) in harsh conditions (120 °C) in the absence of solvent. High yields, relatively short reaction times, efficiency, generality, clean process, simple methodology, low cost, easy work-up, ease of preparation and regeneration of the catalyst and green conditions (in the synthesis of the xanthene derivatives)
Molybdate sulfonic acid: preparation, characterization, and application as an effective and reusable catalyst for octahydroxanthene-1,8-dione synthesis
作者:Bahador Karami、Zahra Zare、Khalil Eskandari
DOI:10.2478/s11696-012-0263-y
日期:2013.1.1
Molybdate sulfonic acid (MSA) as a highly efficient catalyst was synthesized and employed for the synthesis of octahydroxanthene-1,8-dione derivatives. MSA efficiently catalyzed condensation of a wide range of aryl aldehydes and cyclohexane-1,3-diones to obtain octahydroxanthene-1,8-diones. It was characterized by X-ray fluorescence (XRF), X-ray diffraction (XRD), and FT-IR spectroscopy. This catalyst
Nano-zirconia as an excellent nano support for immobilization of sulfonic acid: a new, efficient and highly recyclable heterogeneous solid acid nanocatalyst for multicomponent reactions
作者:Ali Amoozadeh、Salman Rahmani、Mehrnoosh Bitaraf、Fatemeh Bolghan Abadi、Elham Tabrizian
DOI:10.1039/c5nj02430g
日期:——
Nano-zirconia-supported sulfonic acid as a novel, highly efficient and recyclable heterogeneous nanocatalyst is reported for the synthesis of multicomponent reactions.
报告了一种新型的、高效的、可回收的纳米催化剂——纳米氧化锆支撑的磺酸,用于合成多组分反应。
A New Access to 1,8-Dioxooctahydroxanthenes Using Yttrium(III) Nitrate Hexahydrate and Tin(II) Chloride Dihydrate as Effective and Reusable Catalysts
作者:B. Karami、K. Eskandari、Z. Zare、S. Gholipour
DOI:10.1007/s10593-014-1423-5
日期:2014.3
environmentally adapted synthesis of xanthene derivatives by condensation of a wide range of aryl aldehydes and cyclohexane-1,3-diones in the presence of catalytic amounts of yttrium(III) nitrate hexahydrate and tin(II) chloride dihydrate is demonstrated.
Heterogeneous
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magnetic nanocatalyst as an efficient and reusable medium for the synthesis of 3,3′‐(arylmethylene)‐bis‐(4‐hydroxycoumarin), bis‐(indolyl)‐methane, and 1,8‐dioxo‐octahydroxanthene derivatives
作者:Xiaobo Wu、Wan‐Xi Peng
DOI:10.1002/jccs.202000087
日期:2020.11
This work aimed to synthesize a new heterogeneous catalyst (SO3H@Fe3O4 magnetic nanoparticles) and the study of its catalytic behavior in synthesizing 3,3′‐(arylmethylene)‐bis‐(4‐hydroxycoumarin), bis‐(indolyl)‐methane, and 1,8‐dioxo‐octahydroxanthene derivatives. The characterization of obtained material has been performed by means of Fourier‐transform infrared spectroscopy, thermogravimetric analysis
这项工作旨在合成一种新的非均相催化剂(SO 3 H @ Fe 3 O 4磁性纳米粒子),并研究其在合成3,3'-(芳基亚甲基)-双-(4-羟基香豆素),双-(吲哚基)-甲烷和1,8-二氧代-八氢氧杂蒽衍生物。通过傅立叶变换红外光谱,热重分析,X射线衍射,振动样品磁力计和透射电子显微镜对获得的材料进行表征。与以前的方法相比,这种新方法的主要特性是反应时间短,反应条件温和,通过永久磁场简单回收催化剂,具有出色的收率,并且催化剂可重复使用至少六次。