One-pot Suzuki–Miyaura cross-coupling followed by reductive monoalkylation of the resulting nitro biaryl system utilizing Pd/C as catalyst
摘要:
Conditions for one-pot Suzuki-Miyaura cross-coupling between aryl boronic acids and bromo-nitrobenzene followed by reductive monoalkylation of the nitro functionality of the biaryl cross-coupling product utilizing hydrogen over Pd/C as the catalyst and aldehydes as alkylation agent are described. (C) 2013 Elsevier Ltd. All rights reserved.
A novel method for the synthesis of phenanthrenes and benzo[a]carbazoles
作者:Charles B. de Koning、Joseph P. Michael、Amanda L. Rousseau
DOI:10.1016/s0040-4039(98)01919-4
日期:1998.11
The synthesis of several phenanthrenes and carbazoles utilising a novel reaction mediated by potassium t-butoxide and light through a quartz filter is described.
描述了利用由叔丁醇钾和光通过石英滤光片介导的新反应合成几种菲和咔唑的方法。
Base-promoted aromatic [3,3] sigmatropic rearrangement of N-acyl-O-arylhydroxylamine derivatives
作者:Eiji Tayama、Kazuki Hirano
DOI:10.1016/j.tet.2018.12.058
日期:2019.2
temperature generated the corresponding amide enolates. The aromatic [3,3] rearrangement of the enolates provided the desired products in moderate to good yields. A crossover experiment produced only intramolecular products and clarified that the reaction proceeds via the aromatic [3,3] sigmatropicrearrangement, not a bond-cleavage–recombination process. Our method is a formal α-arylation of amides.
A series of benzoquinolin-3-ones are pharmaceuticals effective in treating conditions consequent on both Type I and Type II 5.alpha.-reductase and their preparation is disclosed.
Delineating the Role of Substituents on the Coordination Behavior of Aroylhydrazone Ligands in Pd
<sup>II</sup>
Complexes and their Influence on Suzuki–Miyaura Coupling in Aqueous Media
piperonal aroylhydrazone ligands (HL1–HL4) with [PdCl2(PPh3)2] in CH3OH and CHCl3 afforded four new Pd(II) complexes (1–4) featuring diverse coordination behaviors. These complexes 1–4 were fully characterized by elemental analyses, UV/Visible, FT‐IR and 1H/13C NMR spectra. The variant coordination modes of piperonal aroylhydrazone ligands with Pd(II) ion in these complexes were unambiguously confirmed
Transition‐Metal‐Free Three‐Component Synthesis of Tertiary Aryl Amines from Nitro Compounds, Boronic Acids, and Trialkyl Phosphites
作者:Silvia Roscales、Aurelio G. Csáky
DOI:10.1002/adsc.201901009
日期:2020.1.7
aromatic amines is of continuous interest in chemistry. An exceptionally versatile three‐component reaction that directly transforms inexpensive nitro compounds, boronic acids, and trialkyl phosphites into tertiary aromatic amines has been realized. The reaction tolerates alkyl and aryl substituents on the nitro and boronic acid moieties, as well as functionalized phosphites. No transition‐metal catalysis