A Practical, Metal-Free Synthesis of 1<i>H</i>-Indazoles
作者:Carla M. Counceller、Chad C. Eichman、Brenda C. Wray、James P. Stambuli
DOI:10.1021/ol800053f
日期:2008.3.1
The synthesis of 1H-indazoles is achieved from o-aminobenzoximes by the selective activation of the oxime in the presence of the amino group. The reaction occurs with a variety of substituted o-aminobenzoximes using a slight excess of methanesulfonyl chloride and triethylamine at 0-23 degrees C and is amenable to scale-up. The synthesis of 1H-indazoles under these conditions is extremely mild compared
Base-Catalyzed Cascade Reaction of <i>ortho</i>
-(Propargylamino)aryl Ketones with N-, O-, or S-Based Nucleophiles for the Synthesis of 3-Functionalized Quinoline Scaffolds
作者:Liu-Zhu Yu、Hao-Zhao Wei、Min Shi
DOI:10.1002/adsc.201800120
日期:2018.5.16
A metal‐free and base‐catalyzed cascade reaction of ortho‐(propargylamino)aryl ketones with primary alcohols, secondary amines, including various N‐heterocycles, and thiols through 1,4‐benzoxazepine intermediates was developed, providing a series of synthetically and medically valuable 3‐functionalized quinoline derivatives. The reaction process was easily manipulable and environmentally benign, producing
Palladium-catalyzed oxidative cyclization of aniline-tethered alkylidenecyclopropanes with O<sub>2</sub>: a facile protocol to selectively synthesize 2- and 3-vinylindoles
作者:Bo Cao、Marwan Simaan、Ilan Marek、Yin Wei、Min Shi
DOI:10.1039/c6cc08731k
日期:——
A novel palladium-catalyzedoxidative cyclization of aniline-tethered alkylidenecyclopropanes using molecularoxygen as terminal oxidant through [small beta]-carbon elimination of aminopalladation intermediates is disclosed. The reaction opens up an effective way to...
An atmosphere and light tuned highly diastereoselective synthesis of cyclobuta/penta[<i>b</i>]indoles from aniline-tethered alkylidenecyclopropanes with alkynes
作者:Bo Cao、Yin Wei、Min Shi
DOI:10.1039/c8cc00180d
日期:——
Metal-free and environmentally friendly synthesishighly controlled by natural sources like visible light and air (or oxygen) is always a pursuit of green chemistry. In this paper, an atmosphere and light tuned highlydiastereoselectivesynthesis of two important polyheterocyclic skeletons: cyclobuta/penta[b]indoles from aniline-tethered alkylidenecyclopropanes with alkynes, has been developed. The
受到可见光和空气(或氧气)等自然资源高度控制的无金属,环保的合成方法一直是绿色化学的追求。在本文中,气氛和光调谐两个重要的多杂环骨架高度非对映合成:cyclobuta /五[ b ]从与炔苯胺拴alkylidenecyclopropanes吲哚,已经研制成功。还通过光学拆分获得了手性环丁/戊[ b ]吲哚。
Cascade Amination/Cyclization/Aromatization Process for the Rapid Construction of [2,3-<i>c</i>]Dihydrocarbazoles and [2,3-<i>c</i>]Carbazoles
作者:Xing Fan、Liu-Zhu Yu、Yin Wei、Min Shi
DOI:10.1021/acs.orglett.7b01957
日期:2017.9.1
the presence of silver acetate, affording a variety of [2,3-c]dihydrocarbazoles and [2,3-c]carbazoles in moderate to excellent yields. The mechanistic investigations revealed that this cascade reaction proceeds through a radical initiated process. Moreover, further transformations for the synthesis of eustifoline-D and an OLED exhibit a potential synthetic utility of this method.
已经在乙酸银的存在下开发了功能化的亚烷基环丙烷的分子内级联胺化/环化/芳构化反应,以中等至优异的产率提供了各种[2,3- c ]二氢咔唑和[2,3- c ]咔唑。机理研究表明,这种级联反应是通过自由基引发的过程进行的。而且,用于合成奥司替林-D和OLED的进一步转化显示了该方法的潜在合成效用。