Access to Triazolopiperidine Derivatives via Copper(I)‐Catalyzed [3+2] Cycloaddition/Alkenyl C−N Coupling Tandem Reactions
作者:Guorong Xiao、Kaifu Wu、Wei Zhou、Qian Cai
DOI:10.1002/adsc.202100955
日期:2021.11.9
A copper-catalyzed [3+2] cylcoaddition/ alkenyl C−N coupling tandem reaction was demonstrated. It provided a method for the formation of triazolopiperidine skeletons.
Palladium-catalyzed cascade carboesterification of norbornene with alkynes
作者:Wanqing Wu、Can Li、Jianxiao Li、Huanfeng Jiang
DOI:10.1039/c8ob01799a
日期:——
An efficient and convenient palladium-catalyzed cascade carboesterification of norbornenes (NBE) with alkynes has been accomplished to afford functionalized α-methylene γ-lactone and tetrahydrofuran derivatives in good to excellent yields. This new strategy exhibits excellent atom- and step-economy, good functional group tolerance and broad substrate scope. In particular, NBE-palladium species was
A novel synthesis of oxazolidine-2,4-diones via an efficient fixation of CO<sub>2</sub>with 3-aryl-2-alkynamides
作者:Guofei Chen、Chunling Fu、Shengming Ma
DOI:10.1039/c0ob00550a
日期:——
A very mild protocol for fixation of carbon dioxide with 2-alkynamides in DMSO at 30 °C using a CO2 balloon in the presence of K2CO3 has been developed, which leads to an efficient assembly of oxazolidine-2,4-diones. It is observed that the regioselectivity was controlled by the aryl group.
A palladium/copper-catalyzed oxy-carbonation of propargylic amides by halohydrocarbons and CO2 has been developed toward functionalized oxazolidine-2,4-diones. This multi-component reaction (MCR) was triggered by the oxidative addition of RX to Pd(0), followed by the sequential carboxylation of amide and trans-oxopalladation of an electron-deficient triple bond by RPdX species. Finally, the reductive