9-(Diphenylphosphino)anthracene-based phosphapalladacycle catalyzed conjugate addition of arylboronic acids to electron-deficient alkenes
作者:Minori Shimizu、Tetsuya Yamamoto
DOI:10.1016/j.tetlet.2020.152257
日期:2020.8
9-(Diphenylphosphino)anthracene-based phosphapalladacycle catalyzed conjugateaddition of arylboronic acids to electron-deficient alkenes such asα,β-unsaturated ketones, esters, nitrile and nitroalkenes gave corresponding β-arylated alkanes in good yields and achieved TON up to 700.
Heterogeneous catalytic 1,4-addition of arylmagnesium compounds to chalcones
作者:Kinga Juhász、Zoltán Hell
DOI:10.1016/j.tetlet.2018.07.016
日期:2018.8
Copper(II) on a 4 Å molecular sieve support catalyses the chemoselective addition of alkyl- and arylmagnesiumhalides to chalcones. Only the 1,4-addition products were obtained in high yields.
Copper complexes of phosphoramidites efficiently catalyzed asymmetricaddition of arylboron reagents to acyclic enones. Importantly, rare 1,4-insertion of arylcopper(I) was identified which led directly to O-bound copper enolates. The new mechanism is fundamentally different from classical oxidative addition/reductive elimination of organocopper(I) on enones.
亚磷酰胺的铜配合物有效地催化芳基硼试剂向无环烯酮的不对称加成。重要的是,鉴定了稀有的芳基铜(I)的 1,4-插入,这直接导致了与 O 结合的铜烯醇化物。新机制与传统的有机铜(I)在烯酮上的氧化加成/还原消除有着根本的不同。
Anionic Four-Electron Donor-Based Palladacycles as Catalysts for Addition Reactions of Arylboronic Acids with α,β-Unsaturated Ketones, Aldehydes, and α-Ketoesters
作者:Ping He、Yong Lu、Cheng-Guo Dong、Qiao-Sheng Hu
DOI:10.1021/ol062814b
日期:2007.1.1
acids with aldehydes and alpha-ketoesters are described. Our study demonstrated that palladacycles were highlyefficient, practical catalysts for these addition reactions. The work described here not only opened a new paradigm for the application of palladacycles, but may also pave the road for other metalacycles as practically useful catalysts for such addition reactions including asymmetric ones. [reaction:
CuCl/Bipyridine-Catalyzed Addition Reactions of Arylboroxines with Aldehydes, α,β-Unsaturated Ketones, and <i>N</i>-Tosyl Aldimines
作者:Yuan-Xi Liao、Qiao-Sheng Hu
DOI:10.1021/jo201338v
日期:2011.9.16
CuCl/bipyridine-catalyzed addition reactions of arylboroxines with aldehydes and α,β-unsaturatedketones at elevated temperatures were described. By using the microwave energy, CuCl/bipyridine-catalyzed addition reactions of arylboroxines with aldimines were also realized.