Rh(I)-Catalyzed Decarbonylation of Diynones via C–C Activation: Orthogonal Synthesis of Conjugated Diynes
摘要:
Utilization of C-C bond activation as a unique mode of reactivity for constructing C-C bonds provides new strategies for preparing important organic molecules. Development of a Rh(I)-catalyzed C-C activation of diynones to synthesize symmetrical and unsymmetrical conjugated diynes through decarbonylation is reported. This C-C cleavage strategy takes advantage of the innate reactivity of conjugated ynones without relying on any ring strain or auxiliary directing group. This alkynation method also has orthogonal properties compared to typical cross-coupling reactions.
Phosphine-Catalyzed Synthesis of 3-Allyl-4-pyrones by the Tandem Reaction of Diynones and Allylic Alcohols
作者:Ya-Fang Ye、Wan-Wan Yang、Jing-Wen Zhang、Ji-Ya Fu、Jun-Yan Zhu、Yan-Bo Wang
DOI:10.1021/acs.joc.1c01340
日期:2021.11.5
A simple and effective tandem reaction of diynones and allylicalcohols was developed to afford functionalized 3-allyl-4-pyrones in moderate to excellent yields. This protocol underwent a Michael addition─Claisen rearrangement─O-cyclization process, which exhibited broad substrate tolerance, high regioselectivity, and atom economy under a metal-free condition. Moreover, functional transformation of
Synthesis of 4-(Iso)Quinolinyl-3(<i>2H</i>
)-furanones from (Iso)Quinoline <i>N</i>
-oxides and 1,4-Diyn-3-ones: A Comparison of Copper Catalysis and Metal-free Reaction
作者:Xuetong Li、Tao Wang、Zunting Zhang
DOI:10.1002/adsc.201801382
日期:2019.2.19
A facile synthesis of (iso)quinolinyl‐3(2H)‐furanones from (iso)quinoline N‐oxides and 1,4‐diyn‐3‐ones in the presence of copper catalyst or under metal‐free conditions was developed. The resulting (iso)quinolinyl‐3(2H)‐furanones could be easily converted to (iso)quinolinyl‐isoxazoles, pyrazoles and polycyclic (iso)quinoline derivatives. In addition, the success in one‐pot, metal‐free synthesis of
Sequential [3+2] and [4+4] Annulation of Diynone and <i>o</i>‐Hydroxyaryl Azomethine Ylide: Construction of Dihydropyrrole Fused Eight‐Membered Ring Scaffold
作者:Jie Shen、Yu Xing、Lidong Fu、Yanze Li、Lei Cui、Zijun Zhou、Chunju Li、Jian Li
DOI:10.1002/adsc.202300998
日期:2023.12.5
We developed a cascade reaction of diynone and o-hydroxy aromatic aldimine under mild conditions. This protocol is proposed to proceed through sequential [3+2]/[4+4] cycloaddition and proton transfer processes, thus providing an efficient way for the synthesis of a variety of dihydropyrrole fused eight-membered ring scaffolds.