Synthesis of 3-bromotetronamides via amination of 3,4-dibromofuran-2(5H)-one
摘要:
This work describes the direct synthesis of 3-bromotetronamides in good yields through the reaction of 3,4-dibromofuran-2(5H)-one, obtained from furfural, with primary and secondary amines. Aromatic amines were more tolerated than aliphatic and heteroaromatic ones. The X-ray structures of five derivatives are described.
Polyalkoxybenzenes from Plants. 5. Parsley Seed Extract in Synthesis of Azapodophyllotoxins Featuring Strong Tubulin Destabilizing Activity in the Sea Urchin Embryo and Cell Culture Assays
作者:Marina N. Semenova、Alex S. Kiselyov、Dmitry V. Tsyganov、Leonid D. Konyushkin、Sergei I. Firgang、Roman V. Semenov、Oleg R. Malyshev、Mikhail M. Raihstat、Fabian Fuchs、Anne Stielow、Margareta Lantow、Alex A. Philchenkov、Michael P. Zavelevich、Nikolay S. Zefirov、Sergei A. Kuznetsov、Victor V. Semenov
DOI:10.1021/jm200737s
日期:2011.10.27
targeted molecules were evaluated in vivo in a phenotypic seaurchinembryo assay for antimitotic and tubulin destabilizing activity. The most active compounds identified by the in vivo seaurchinembryo assay featured myristicin-derived ring E (4e, 6e, and 8e). These molecules were determined to be more potent than podophyllotoxin. Cytotoxic effects of selected molecules were further confirmed and evaluated
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
Enantioselective Construction of Cyclic Enaminone-Based 3-Substituted 3-Amino-2-oxindole Scaffolds<i>via</i>Catalytic Asymmetric Additions of Isatin-Derived Imines
作者:Lu-Jia Zhou、Yu-Chen Zhang、Fei Jiang、Guofeng He、Jingjing Yan、Han Lu、Shu Zhang、Feng Shi
DOI:10.1002/adsc.201600508
日期:2016.10.6
bioactivity has been developed via chiral phosphoric acid‐catalyzed enantioselective addition reactions of cyclic enaminones to isatin‐derived imines, which afforded a series of cyclic enaminone‐based 3‐substituted 3‐amino‐2‐oxindoles in high yields and excellent enantioselectivities (up to 99% yield, 97% ee). The investigation of the reaction mechanism suggested that it was facilitated by a dual hydrogen‐bonding
An efficient, clean, atom-economical and simple method for the one-pot synthesis of novel spirooxindolederivatives via a three-component reaction of isatins, dimedone and anilinolactones was reported. This reaction was performed by using MnFe2O4 nanoparticles (5 mol%) as an efficient magnetically heterogeneous catalyst in water as green solvent. Prominent among the advantages of this method is the
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。
Domino Constructions of Pentacyclic Indeno[2,1-c]quinolines and Pyrano[4,3-b]oxepines by [4+1]/[3+2+1]/[5+1] and [4+3] Multiple Cyclizations
作者:Bo Jiang、Bao-Ming Feng、Shu-Liang Wang、Shu-Jiang Tu、Guigen Li
DOI:10.1002/chem.201201109
日期:2012.8.6
New three‐component domino reactions have been discovered. The reactions are easy to perform (see scheme; MW=microwave irradiation) and proceed with fast rates, which makes work‐up convenient. Most of the multiple stereocenters and the geometry are controlled well. The stereochemistry has been unequivocally determined by X‐ray structural analysis.
发现了新的三组分多米诺骨牌反应。该反应易于进行(参见方案;MW=微波辐射)并且进行速度快,这使得后处理变得方便。大多数多个立构中心和几何形状都控制得很好。立体化学已通过 X 射线结构分析明确确定。