乙炔/烯醛与叠氮化物的[Au]催化的[3 + 3]环加成反应,可在良好或优异的条件下有效地选择性合成高度熔融的呋喃[3,4- d ] [1,2,3]三嗪已经开发了在温和条件下的产量。通过用硝酸铈铵(CAN)氧化来开发呋喃三嗪的合成效用,从而提供高度官能化的二氢三嗪。呋喃[3,4- d ] [1,2,3]三嗪和二氢三嗪均显示出良好的荧光活性。
Highly Substituted 2,3-Dihydroisoxazoles by Et<sub>3</sub>N-Catalyzed Tandem Reaction of Electron-Deficient 1,3-Conjugated Enynes with Hydroxylamines
作者:Xiuzhao Yu、Bo Du、Kai Wang、Junliang Zhang
DOI:10.1021/ol100490y
日期:2010.4.16
reaction of electron-deficient 1,3-conjugated enynes with hydroxylamines was developed which provided rapid, metal-free, and regioselective access to highly substituted multifunctionalized 2,3-dihydroisoxazoles under mild conditions. The reactions of 3-(2-arylethynyl)-4H-chromen-4-ones with hydroxylamines afford β-amino enones under the same reaction conditions.
Tetrasubstituted furans by PdII/CuI-cocatalyzed three-component domino reactions of 2-(1-alkynyl)-2-alken-1-ones, nucleophiles and diaryliodonium salts
作者:Wenbo Li、Junliang Zhang
DOI:10.1039/c0cc03450a
日期:——
A novel Pd(OAc)(2)/CuI-cocatalyzed three-componentreaction of 2-(1-alkynyl)-2-alken-1-ones, nucleophiles and diaryliodonium salts has been developed. The procedure allows the synthesis of tetrasubstitutedfurans in good to high yields under mild conditions.
Sc(OTf)<sub>3</sub>-Catalyzed Diastereoselective Formal [3+2] Cycloaddition Reactions of Alkynylcyclopropane Ketones with Electron-Rich Aromatic Aldehydes To Yield 2,5-<i>trans</i>-Tetrahydrofurans
作者:Chi Zhang、Muyun Xu、Jun Ren、Zhongwen Wang
DOI:10.1002/ejoc.201600233
日期:2016.5
the general [4+2] cycloaddition reactions of alkynylcyclopropane ketones reported in the literature, we report herein a Sc(OTf)3-catalyzed formal intermolecular [3+2] cycloaddition reaction of alkynylcyclopropane ketones with electron-rich aromatic aldehydes. 2,3,3,5-Tetrasubstituted tetrahydrofurans were obtained by this method, and the tetrahydrofuran skeleton was diastereoselectively constructed with
An Unexpected Phosphine-Catalyzed Regio- and Diastereoselective [4+1] Annulation Reaction of Modified Allylic Compounds with Activated Enones
作者:Zuliang Chen、Junliang Zhang
DOI:10.1002/asia.201000193
日期:——
Rapid access: An unexpected regio‐ and diastereoselective phosphine‐catalyzed [4+1] annulationreaction of modifiedallyliccompounds with activatedenones was revealed, providing a simple, efficient route to synthesis of highly substituted 2,3‐dihydrofurans with convertible functional groups.
Regioselective Addition of Organometallic Reagents to 2-(1-Alkynyl)-2-alken-1-ones for an Efficient Synthesis of Substituted 1,2-Allenyl Ketones
作者:Xiuzhao Yu、Junliang Zhang
DOI:10.1002/adsc.201100009
日期:2011.5
Highly substituted 1,2‐allenyl ketones can be easily and efficiently prepared fromorganometallicreagents and readily available 2‐(1‐alkynyl)‐2‐alken‐1‐ones. The synthetic application of 1,2‐allenyl ketone products was also showcased by palladium‐catalyzed further transformation.