A pincer-type Ru(II)-NNP complex bearing a pyrazolyl-(NH-PtBu2)-pyridine ligand was synthesized and structurally characterized by NMR, IR, elemental analysis, and X-ray single-crystal crystallographic determinations, which efficiently catalyzed the synthesis of multisubstituted pyrroles and pyridines by means of the reactions of secondary alcohols and β- or γ-amino alcohols through deoxygenation and
合成了带有吡唑基-(NH-P t Bu 2)-吡啶配体的钳型Ru(II)-NNP络合物,并通过NMR,IR,元素分析和X射线单晶晶体学测定对其结构进行了表征,通过仲醇与β-或γ-氨基醇的脱氧反应以及选择性C–N和C–C键的形成,有效地催化了多取代吡咯和吡啶的合成。偶联反应以0.3mol%的催化剂负载量和容许的各种官能团进行。本工作提供了一种从容易获得的配体中构建高活性过渡金属配合物催化剂的替代方法。
A Synthetic Methodology for Pyrroles from Nitrodienes
作者:Mohamed A. EL-Atawy、Francesco Ferretti、Fabio Ragaini
DOI:10.1002/ejoc.201701814
日期:2018.9.16
Palladium complexes containing the ligand 4,7‐dimethoxy‐1,10‐phenanthroline catalyze the reductivecyclization of nitrodienes using carbonmonoxide as the reductant to give pyrroles. Carbon dioxide is the only stoichiometric byproduct of the reaction.
Decarboxylative arylation of substituted pyrroles <i>N</i>-protected with 2-(trimethylsilyl)ethoxymethyl (SEM)
作者:Carlotta Figliola、Sarah M. Greening、Connor Lamont、Brandon R. Groves、Alison Thompson
DOI:10.1139/cjc-2017-0402
日期:2018.6
Palladium-catalyzed decarboxylative arylation is reported using pyrroles N-protected with the 2-(trimethylsilyl)ethoxymethyl (SEM) group and featuring 2-, 3-, and 4-substituents about the pyrrolic ...
A decarboxylativeintramolecularaziridination reaction of alkene‐tethered 4H‐isoxazol‐5‐ones with a palladium/phosphine catalyst gave 1‐azabicyclo[3.1.0]hex‐2‐enes in moderate to high yields (see scheme; dba=dibenzylideneacetone). The resulting N‐fused bicyclic aziridines readily reacted with various reagents to afford ring‐opening pyrroline derivatives.
azabicyclic cyclopropanes (with Co catalyst). The rhodium-catalyzed 2H-pyrrole formation involving hydrogen shift is supported by deuterium-labeling experiments. The control experiments in the cobalt-catalyzed reaction indicate that the bicyclic aziridines as the primary product undergo a skeletalrearrangement assisted by metal iodide salts.