Efficient [(NHC)Au(NTf<sub>2</sub>)]-catalyzed hydrohydrazidation of terminal and internal alkynes
作者:Maximillian Heidrich、Herbert Plenio
DOI:10.3762/bjoc.16.175
日期:——
The efficient hydrohydrazidation of terminal (6a–r, 18 examples, 0.1–0.2 mol % [(NHC)Au(NTf2)], T = 60 °C) and internal alkynes (7a–j, 10 examples, 0.2–0.5 mol % [(NHC)Au(NTf2)], T = 60–80 °C) utilizing a complex with a sterically demanding bispentiptycenyl-substituted NHC ligand and the benign reaction solvent anisole, is reported.
Copper catalyzed cyanomethylation reaction of 4-thiazolidinone
作者:Prakashsingh M. Chauhan、Mayur I. Morja、Manjoorahmed Asamdi、Kishor H. Chikhalia
DOI:10.1016/j.tetlet.2020.152601
日期:2020.12
An effective coppercatalyzedCrossDehydrogenativeCoupling (CDC) reaction of 4-thiazolidinones with acetonitrile has been developed. The described strategy undergoes radical pathway by employing copper, oxidant and easily available acetonitrile as a cyanomethyl source. Various cyanomethylated 4-thiazolidinone derivatives were obtained easily and conveniently in moderate to good yield by employing
Catalytic asymmetric reductive amination of ketones via highly enantioselective hydrogenation of the CN double bond
作者:Mark J. Burk、Jose P. Martinez、John E. Feaster、Nick Cosford
DOI:10.1016/s0040-4020(01)89375-3
日期:1994.4
a convenient, chemoselective asymmetric reductive amination procedure for the conversion of ketones to chiral hydrazines and amines. The key step in the three-step process is enantioselective DuPHOS-Rh-catalyzed hydrogenation of the CN double bond of N-acylhydrazones. Detailed optimization studies revealed the effect of solvent, temperature, and the N-acyl group on the enantioselectivity and catalytic
Palladium-Catalyzed Carbonylative Synthesis of 3-Methyleneisoindolin-1-ones from Ketimines with Hexacarbonylmolybdenum(0) as the Carbon Monoxide Source
An interesting procedure for the palladium‐catalyzed carbonylativesynthesis of 3‐methyleneisoindolin‐1‐ones from ketimines was established. By using Mo(CO)6 (0.3 equiv.) as the solid CO source and through C(sp2)−H bondactivation, the desired 3‐methyleneisoindolin‐1‐ones were isolated in moderate to good yields.
Half-sandwich iridium complexes with hydrazone ligands: preparation, structure, and catalytic synthesis of cyanosilylethers under air
作者:Song Gao、Zhen-Jiang Liu、Yu-Zhou Luo、Zi-Jian Yao
DOI:10.1039/d3dt01617j
日期:——
trimethylsilyl cyanide (TMSCN) with carbonyl substrates, with good to excellent yields. The excellent catalytic efficiency, wide substrate range, and mild reaction conditions made this type of iridiumcatalyst have the potential for industrial applications. All the half-sandwich iridium complexes were well characterized by IR, NMR, and EA analyses. The molecular structure of iridium complex 1 was confirmed by
通过简单的路线合成了一系列基于腙的N , O-螯合半夹心铱配合物,收率良好。这些空气和水分稳定的铱配合物在温和的反应条件下在氰基甲醚合成中表现出优异的催化活性。在铱催化下,三甲基氰硅烷(TMSCN)与羰基底物进行一锅反应,得到了各种不同取代基的氰基甲醚,收率良好至优异。优异的催化效率、广泛的底物范围和温和的反应条件使此类铱催化剂具有工业应用的潜力。所有半夹心铱配合物均通过 IR、NMR 和 EA 分析得到了很好的表征。通过单晶X射线分析证实了铱配合物1的分子结构。