已成功实现了碱促进的杂环烯胺和2,3-环氧丙烷-1-酮的环过环化反应,为具有结构选择性和立体选择性的结构多样的稠合吡啶和吡咯提供了新途径。在微波加热下用N-芳基4-氨基呋喃-2(5 H)-one和2,3-环氧丙烷-1-酮处理可得到高产率的功能性呋喃[3,2- b ]吡啶。带有吸电子基团的N-芳基4-氨基吡咯-2(5 H)-参与反应,得到吡咯并[3,2- b ]吡啶,而其对应物带有电子中性基团或给电子基团经历了不同的反应途径形成吡咯并[3,2- b通过C–C键断裂产生的吡咯。
据报道,一种高效,清洁,原子经济,简单的方法,可通过靛红,二甲双酮和苯胺内酯的三组分反应,一锅合成新型螺氧杂吲哚衍生物。通过使用MnFe 2 O 4纳米颗粒(5 mol%)作为有效的磁性非均相催化剂,在水中作为绿色溶剂来进行该反应。该方法的优点中最突出的是使用了磁性可回收和可重复使用的催化剂,简单的后处理程序,良好或较高的产品收率以及使用水作为溶剂被认为对环境无害。
A domino synthetic strategy leading to two-carbon-tethered fused acridine/indole pairs and fused acridine derivatives
作者:Bo Jiang、Xue Wang、Meng-Yuan Li、Qiong Wu、Qin Ye、Hai-Wei Xu、Shu-Jiang Tu
DOI:10.1039/c2ob26315g
日期:——
pairs were synthesized via Brønsted acid-promoted domino reactions between indoline-2,3-dione and C2-tethered indol-3-yl enaminones. The reactions were further expanded to prepare C-tethered fused acridine/pyridine pairs, N-substituted amino acids, N-cyclopropyl and N-aryl substituted fused acridine derivatives, as well as bis-furan-3-yl-substituted indoles. During these reaction processes, the domino
One-Pot Synthesis of 3-Functionalized 4-Hydroxycoumarin under Catalyst-Free Conditions
作者:Yang Gao、Guo-Ning Zhang、Juxian Wang、Xiaoguang Bai、Yiliang Li、Yucheng Wang
DOI:10.3390/molecules23010235
日期:——
A concise and efficient one-pot synthesis of 3-functionalized 4-hydroxycoumarin derivatives via a three-component domino reaction of 4-hydroxycoumarin, phenylglyoxal and 3-arylaminocyclopent-2-enone or 4-arylaminofuran-2(5H)-oneunder catalyst-free and microwaveirradiationconditions is described. This synthesis involves a group-assisted purification process, which avoids traditional recrystallization
Supported molybdenum on graphene oxide/Fe3O4: An efficient, magnetically separable catalyst for one-pot construction of spiro-oxindole dihydropyridines in deep eutectic solvent under microwave irradiation
Magnetically separable grapheneoxide supported molybdenum (Fe3O4/GO-Mo) nanoparticles were prepared and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), and vibrating sample magnetometry (VSM) techniques. The synthesized heterogeneous material was found to exhibit high catalytic activity
磁性可分离的氧化石墨烯负载的钼(Fe 3 O 4/ GO-Mo)纳米粒子的制备和表征,包括X射线衍射(XRD),扫描电子显微镜(SEM),透射电子显微镜(TEM),傅里叶变换红外光谱(FT-IR)和振动样品磁强度(VSM)技术。发现合成异质材料在微波辐射下,用氯化胆碱(ChCl)/脲作为绿色溶剂,在靛红,丙二腈和苯胺内酯的一锅,三组分反应中显示出高催化活性。它提供了一种高效,高产率地合成螺并吲哚二氢吡啶的有效方法。催化系统可以成功地重复使用八次,而催化性能的下降很小。
Manganese ferrite nanoparticle catalyzed tandem and green synthesis of spirooxindoles
PEG-400 as a nontoxic, green and reusable solvent was used for the synthesis of novel spiro-furo-pyridine-indoline-carbonitriles in the presence of a magnetically recoverable nanocatalyst.
New domino heteroannulation of enaminones: synthesis of diverse fused naphthyridines
作者:Jing Li、Yan Yu、Man-Su Tu、Bo Jiang、Shu-Liang Wang、Shu-Jiang Tu
DOI:10.1039/c2ob25349f
日期:——
three-component reaction of aldehyde, 2-aminoprop-1-ene-1,1,3-tricarbonitrile and enaminone in EtOH using EtONa as a base. During these reaction processes, the domino construction of fused naphthyridine skeleton with concomitant formation of two new pyridine rings was readily achieved via base promoted three-component reactions in a one-pot operation. The procedures are facile, avoiding time-consuming