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。
Palladium-catalysed aminosulfonylation of aryl-, alkenyl- and heteroaryl halides: scope of the three-component synthesis of N-aminosulfonamides
作者:Edward J. Emmett、Charlotte S. Richards-Taylor、Bao Nguyen、Alfonso Garcia-Rubia、Barry R. Hayter、Michael C. Willis
DOI:10.1039/c2ob07034k
日期:——
By using DABCO·(SO2)2, DABSO, as a solid bench-stable SO2-equivalent, the palladium-catalysed aminosulfonylation of aryl-, alkenyl- and heteroaryl halides has been achieved. N,N-Dialkylhydrazines are employed as the N-nucleophiles and provide N-aminosulfonamides as the products in good to excellent yields. The reactions are operationally simple to perform, requiring only a slight excess of SO2 (1.2–2.2 equiv.), and tolerate a variety of substituents on the halide coupling partner. Variation of the hydrazine component is also demonstrated. The use of N,N-dibenzylhydrazine as the N-nucleophile delivers N-aminosulfonamide products that can be converted into the corresponding primary sulfonamides using a high-yielding, telescoped, deprotection sequence. The ability to employ hydrazine·SO2 complexes as both the N-nucleophile and SO2 source is also illustrated.
Engaging Ag(0) single atoms in silver(I) salts-mediated C-B and C-S coupling under visible light irradiation
作者:Enxin Cui、Dan Qiao、Haibin Li、Lirong Guo、Chen-Ho Tung、Yifeng Wang
DOI:10.1016/j.jcat.2021.08.035
日期:2021.10
transmission electron microscope (HAADF AC-STEM) and electron paramagnetic resonance (EPR). The activities of the silver(I) salts were affected by the anions and could be associated with their abilities in formation of AgSAs during the reactions. Kinetic studies showed that the deiodination rate was linearly correlated with the loading of AgSAs, and hence AgSAs were the true catalytic centers for the 1e−-reduction
SECONDARY HOLE TRANSPORTING LAYER WITH DIARYLAMINO-PHENYL-CARBAZOLE COMPOUNDS
申请人:Kwong Raymond
公开号:US20130241401A1
公开(公告)日:2013-09-19
Novel diarylamino phenyl carbazole compounds are provided. By appropriately selecting the nature of the diarylamino substituent and the substitution on the carbazole nitrogen, compounds with appropriate HOMO and LUMO energies can be obtained for use as materials in a secondary hole transport layer.