Clean, reusable and low cost heterogeneous catalyst for amide synthesis
作者:James W. Comerford、James H. Clark、Duncan J. Macquarrie、Simon W. Breeden
DOI:10.1039/b901581g
日期:——
We have developed a heterogeneous silica catalyst that can effectively catalyse amide synthesis from acid and amine, without production of toxic by-products and with the advantage of being readily available, low cost, environmentally benign and reusable.
Various carboxylic esters or carboxamides are prepared in good yields under nearly neutral conditions from equimolar amounts of free carboxylic acids and alcohols or amines, respectively, by the use of 1,1′-dimethylstannocene as a condensing reagent.
Selective Palladium-Catalyzed Aminocarbonylation of Olefins with Aromatic Amines and Nitroarenes
作者:Xianjie Fang、Ralf Jackstell、Matthias Beller
DOI:10.1002/anie.201308455
日期:2013.12.23
Various olefins can be smoothly transformed in the presence of a Pd‐based catalyst system and (hetero)aromaticamines or nitroarenes to synthetically interesting amides in good yields and often with high regioselectivity (see scheme). Combining this atom‐efficient procedure with established functionalizations of the resulting products allows the efficient preparation of quinolines.
Manganese‐Catalyzed Hydroarylation of Unactivated Alkenes
作者:Ting Liu、Yunhui Yang、Congyang Wang
DOI:10.1002/anie.202003830
日期:2020.8.17
Transition‐metal‐catalyzed hydroarylation of unactivated alkenes with strategic use of remote coordinating functional groups has received significant attention recently to address the issues of both low reactivity and poor selectivity. The bidentate 8‐aminoquinoline amide group is the most successfully adopted in unactivated alkenes for Pd and Ni catalysis. We describe the first manganese‐catalyzed hydroarylation
The Use of Ureates as Activators for Samarium Diiodide
作者:Chriss E. McDonald、Jeremy D. Ramsey、Christopher C. McAtee、Joseph R. Mauck、Erin M. Hale、Justin A. Cumens
DOI:10.1021/acs.joc.6b00733
日期:2016.7.15
substrates of low reactivity such as aryl fluorides. Because of ease of synthesis and low molecular weight, the conjugate base of triethylurea (TEU–) was of primary focus. Visible spectroscopy and reactivity data are consistent with the hypothesis that the same complex is being formed when SmI2 is combined with either 2 or 4 equiv of TEU–, in spite of the greater reactivity of SmI2/4 TEU– with some alkyl