Pd-Catalysed carbonylative Suzuki–Miyaura cross-couplings using Fe(CO)<sub>5</sub> under mild conditions: generation of a highly active, recyclable and scalable ‘Pd–Fe’ nanocatalyst
作者:Zhuangli Zhu、Zhenhua Wang、Yajun Jian、Huaming Sun、Guofang Zhang、Jason M. Lynam、C. Robert McElroy、Thomas J. Burden、Rebecca L. Inight、Ian J. S. Fairlamb、Weiqiang Zhang、Ziwei Gao
DOI:10.1039/d0gc03036h
日期:——
[Fe(CO)5] has been identified in gaseous CO-free carbonylative Suzuki–Miyaura cross-couplings, in which Fe(CO)5 supplied CO in situ, leading to the propagation of catalytically active Pd–Fe nanoparticles. Compared with typical carbonylative reaction conditions, CO gas (at high pressures), specialised exogenous ligands and inert reaction conditions were avoided. Our developed reaction conditions are
Nucleophilic addition of tertiary propargylic amines to arynes followed by a [2,3]-sigmatropic rearrangement
作者:Meng-Guang Zhou、Rui-Han Dai、Shi-Kai Tian
DOI:10.1039/c8cc02176g
日期:——
In the presence of 2-(trimethylsilyl)aryl triflates as aryne precursors under mild conditions, a range of tertiary propargylicamines bearing electron-withdrawing groups were converted to quaternary propargylic ammonium ylides followed by a [2,3]-sigmatropic rearrangement to afford structurally diverse amino-substituted allenes or conjugated dienes, depending on their structure, in moderate to good
4-aminobiphenyl derivative arylamine compounds are formed by providing an iodinated organic compound; substituting the iodinated organic compound at carboxylic acid groups thereof to provide ester protecting groups; conducting an Ullman condensation reaction to convert the product of step (ii) into an arylamine compound; and conducting a Suzuki coupling reaction to add an additional phenyl group to the arylamine compound in the 4-position relative to the nitrogen.
Photocatalytic Reaction of Aryl Halides with Tin(II) Acetate to Generate Arylstannane(IV) Reagents
作者:Artem A. Zemtsov、Vyacheslav I. Supranovich、Vitalij V. Levin、Alexander D. Dilman
DOI:10.1021/acscatal.3c03626
日期:2023.10.6
Aromatic organotin(IV) compounds are a valuable class of reagents widely used in cross-coupling reactions. However, the toxicity of the most popular tributyl-substituted arylstannanes, combined with complicated methods for their synthesis, imposes serious limitations. Herein, we report an approach to accessing aryl organotin(IV) reagents directly from aryl halides and cheap inorganic tin(II) acetate
Methods for determining the presence and/or concentration of an analyte in a biological fluid sample are disclosed. The methods generally include admixing in solution certain polymer/reactant and reporter/reactant conjugates along with the biological fluid sample suspected of containing the analyte, thereby forming ternary complexes. The separation of the complexes from the reaction mixture is achieved through the affinity of certain selected polymer compositions for various solid phases. Upon separation, the amount of reporter activity in the solution may be measured, and therefrom the presence and/or concentration of the analyte determined. Multiple analyses on a biological fluid sample suspected of containing one or more analytes may also be performed, using either a variety of different reporters or selected polymers having varied affinity for the solid phase.
Cross-Reference to Related Application
This application is a continuation-in-part of co- pending application Serial No. 932,656, filed November 19, 1986.