Palladium-catalyzed intermolecular transthioetherification of aryl halides with thioethers and thioesters
作者:Yahui Li、Gao Bao、Xiao-Feng Wu
DOI:10.1039/c9sc05532k
日期:——
Functional group transfer reactions are an important synthetic tool in modern organic synthesis. Herein, we developed a new palladium-catalyzed intermolecular transthioetherification reaction of arylhalides with thioethers and thioesters. The synthetic utility and practicality of this catalytic protocol are demonstrated in a wide range of successful transformations (>70 examples). This catalytic protocol
Preparation of Polyfunctionalized Aromatic Nitriles from Aryl Oxazolines
作者:A. Hess、H. C. Guelen、N. Alandini、A. Mourati、Y. C. Guersoy、P. Knochel
DOI:10.1002/chem.202103700
日期:2022.1.3
Aryl nitriles from oxazolines: We report a new method for for preparing highly functionalized tri-, tetra- and penta-substituted aromaticnitriles by using two successive magnesiations with sBu2Mg in toluene followed by trapping reactions with a broad range of electrophiles followed by an efficient conversion of the oxazolyl-directing group to a nitrile function by using oxalyl chloride and catalytic
来自恶唑啉的芳基腈:我们报道了一种制备高官能化三、四和五取代芳香腈的新方法,该方法通过在甲苯中使用s Bu 2 Mg 进行两次连续的镁化,然后与多种亲电子试剂发生捕获反应,然后使用草酰氯和催化量的 DMF(50 °C,4 小时)将恶唑基导向基团有效转化为腈官能团。
C(sp<sup>3</sup>)–H Monoarylation of Methanol Enabled by a Bidentate Auxiliary
With the assistance of a practical directing group (COAQ), the first catalytic protocol for the palladium-catalyzed C(sp3)–H monoarylation of methanol has been developed, offering an invaluable synthesis means to establish extensive derivatives of crucial arylmethanol functional fragments. Furthermore, the gram-scale reaction, broad substrate scope, excellent functional group compatibility, and even
Metal-Free <i>ortho</i>-Selective C–H Borylation of 2-Phenylthiopyridines Using BBr<sub>3</sub>
作者:Gaorong Wu、Binghan Pang、Yangyang Wang、Li Yan、Lu Chen、Tao Ma、Yafei Ji
DOI:10.1021/acs.joc.1c00520
日期:2021.4.16
2-phenylthiopyridines using BBr3 as the boron source under metal-free conditions has been reported. The reaction exhibited site exclusivity, and the synthesized aryl boronates were freely converted to various useful intermediates. Thus, this facile method would be beneficial to synthesize structurally diversified phenylthioethers derivatives and other materials containing boron-nitrogen coordination.
作者:Hua Wang、Yanan Dong、Chaonan Zheng、Christian A. Sandoval、Xue Wang、Mohamed Makha、Yuehui Li
DOI:10.1016/j.chempr.2018.09.009
日期:2018.12
Selective cyanation of aryl halides was achieved with CO2 and NH3 as the only sources of carbon and nitrogen, respectively. In the presence of Cu catalysts under low pressure (3 atm), a variety of aromatic iodides and bromides were transformed to the desired nitrile products without the use of toxic metal cyanides. Notably, olefins, esters, amides, alcohols, and amino groups were tolerated. Mechanistic