A Tetraarylpyrrole‐Based Phosphine Ligand for the Palladium‐Catalyzed Amination of Aryl Chlorides
作者:Masahiro Sai
DOI:10.1002/adsc.202100731
日期:2021.12.21
A tetraarylpyrrole-based phosphine ligand L1 in combination with Pd(dba)2 provided a catalyst for the Buchwald-Hartwig amination reaction. A variety of amines were rapidly coupled with aryl chlorides at a Pd loading of 0.5 mol%. The selective monoarylation of aliphatic primary amines was achieved in the presence of 0.8 equiv. water. Comparison experiments were also conducted, which revealed that the
Palladium-Catalysed Amination of Aryl- and Heteroaryl Halides Using<i>tert</i>-Butyl Tetraisopropylphosphorodiamidite as an Easily Accessible and Air-Stable Ligand
作者:Gheorghe-Doru Roiban、Gerlinde Mehler、Manfred T. Reetz
DOI:10.1002/ejoc.201301789
日期:2014.4
phosphorus compound tert-butyl tetraisopropylphosphorodiamidite, prepared from bis(diisopropylamino)chlorophosphine, is an excellent ligand for palladium-catalysed Buchwald–Hartwig amination of aryl- and heteroaryl chlorides and bromides. Based on its ready accessibility and air-stability, this amination protocol is a practical approach to the synthesis of industrially important aryl- and heteroarylamines.
Abstract Direct preparation of tertiary amines in which two substituents are aromatic is described. In the presence of either the inorganic base sodium tert-butoxide or the sterically hindered organic base diisopropylethylamine, the alkylation of secondary diarylamines is achieved smoothly. In contrast to methods previously reported in the literature, this procedure is high-yielding and does not require
C(sp3)-N Bond-Forming Reductive Elimination of Amines: Reactions of Bisphosphine-Ligated Benzylpalladium(II) Diarylamido Complexes
作者:Seth L. Marquard、Devon C. Rosenfeld、John F. Hartwig
DOI:10.1002/anie.200904032
日期:2010.1.18
A rare event: The benzylpalladium amido complex 1 (Ar=napthyl) was used to study the mechanism of an unusual reductiveelimination of amines (see scheme). The observed inversion of configuration is proposed to result from dissociation of the amido ligand, followed by nucleophilic attack on the benzylic carbon atom. binap=2,2′‐bis(diphenylphosphanyl)‐1,1′‐binaphthyl, dppf=1,1′‐bis(diphenylphosphanyl)ferrocene
Lubricating oils of enhanced oxidation stability are obtained by adding to the lubricating oil a mixture comprising carbodiimide as acid scavenger and either n-phenyl-1-naphthyl amine or its substituted derivatives as amine anti-oxidant.