Mixed er-NHC/phosphine Pd(<scp>ii</scp>) complexes and their catalytic activity in the Buchwald–Hartwig reaction under solvent-free conditions
作者:Alexandra A. Ageshina、Grigorii K. Sterligov、Sergey A. Rzhevskiy、Maxim A. Topchiy、Gleb A. Chesnokov、Pavel S. Gribanov、Elizaveta K. Melnikova、Mikhail S. Nechaev、Andrey F. Asachenko、Maxim V. Bermeshev
DOI:10.1039/c9dt00216b
日期:——
A series of novel (NHC)PdCl2-PR3 complexes were synthesized and fully characterized by 1H, 13C, 31P NMR and FT-IR spectroscopy. These complexes showed high catalytic activity toward solvent-free Buchwald–Hartwig amination. Both primary and secondary amines were efficiently utilized under the same reaction conditions. The solvent-free synthesis of valuable N-aryl carbazoles and similar N-heterocyclic
合成了一系列新颖的(NHC)PdCl 2 -PR 3配合物,并通过1 H,13 C,31 P NMR和FT-IR光谱进行了全面表征。这些配合物对无溶剂的布赫瓦尔德-哈特维格胺胺化显示出很高的催化活性。在相同的反应条件下,伯胺和仲胺均得到有效利用。描述了有价值的N-芳基咔唑和类似的N-杂环体系的无溶剂合成。
A Tuned Bicyclic Proazaphosphatrane for Catalytically Enhanced<i>N</i>-Arylation Reactions with Aryl Chlorides
作者:So Han Kim、Min Kim、John G. Verkade、Youngjo Kim
DOI:10.1002/ejoc.201403428
日期:2015.3
The N-arylation of various amines with arylchlorides proceeded in good-to-excellent yields in the presence of P[N(p-NMe2)C6H4CH2}CH2CH2]3N (1e, a new electron-rich proazaphosphatrane ligand) and small amounts of Pd2(dba)3 (dba = dibenzylideneacetone). This catalytic system was also very effective for the synthesis of carbazoles.
Solvent-Free Buchwald-Hartwig Reaction of Aryl and Heteroaryl Halides with Secondary Amines
作者:Maxim A. Topchiy、Andrey F. Asachenko、Mikhail S. Nechaev
DOI:10.1002/ejoc.201402077
日期:2014.6
A highly efficient solvent-free protocol for the Buchwald–Hartwig amination of (hetero)aryl halides by secondary amines was developed. The reaction is mediated by a Pd(OAc)2/RuPhos catalytic system in air. Various (hetero)aryl halides were coupled with diaryl, alkyl–aryl, and dialkylamines in good to excellent yields (51 examples, 50–99 % yield).
The present invention provides the preparation and use of halophosphine-transition metal complex as catalysts for cross-coupling reaction to produce substituted aromatic heterocycles, biaryls and arylamines by reacting pyridyl halides or aryl halides with arylboronic acids or amines.
diphenylvinylphosphine‐palladium complex 1 and the diphenylcyclopropylphosphine‐palladium complex 2 were successfully synthesized. The crystal structures of these complexes were obtained by X‐ray crystallographic analysis. Both complexes were air‐ and moisture‐stable, and could be prepared on a gram scale. These palladium complexes catalyzed the Suzuki–Miyaurareaction of aryl bromides [turnover numbers