Copper-Catalyzed Hydroxylation of (Hetero)aryl Halides under Mild Conditions
作者:Shanghua Xia、Lu Gan、Kailiang Wang、Zheng Li、Dawei Ma
DOI:10.1021/jacs.6b08114
日期:2016.10.19
powerful catalytic system for hydroxylation of (hetero)arylhalides. A wide range of (hetero)aryl chlorides bearing either electron-donating or -withdrawing groups proceeded well at 130 °C, delivering the corresponding phenols and hydroxylated heteroarenes in good to excellent yields. When more reactive (hetero)aryl bromides and iodides were employed, the hydroxylation reactions completed at relatively
We have developed a high-efficiency and practical Cu-catalyzed cross-coupling to directly construct versatile α-aryl-esters by utilizing readily available aryl bromides (or chlorides) and malonates. These gram-scale approaches occur with turnovers of up to 1560 and are smoothly conducted by the usage of a low catalyst loading, a new available ligand, and a green solvent. A variety of functional groups
CuI/Oxalic Diamide Catalyzed Coupling Reaction of (Hetero)Aryl Chlorides and Amines
作者:Wei Zhou、Mengyang Fan、Junli Yin、Yongwen Jiang、Dawei Ma
DOI:10.1021/jacs.5b08411
日期:2015.9.23
A class of oxalic diamides are found to be effective ligands for promoting CuI-catalyzed aryl amination with less reactive (hetero)aryl chlorides. The reaction proceeds at 120 °C with K3PO4 as the base in DMSO to afford a wide range of (hetero)aryl amines in good to excellent yields. The bis(N-aryl) substituted oxalamides are superior ligands to N-aryl-N'-alkyl substituted or bis(N-alkyl) substituted
发现一类草酸二酰胺是促进 CuI 催化的芳基胺化与反应性较低的(杂)芳基氯化物的有效配体。该反应在 120 °C 下以 K3PO4 作为碱在 DMSO 中进行,以良好到极好的收率提供范围广泛的(杂)芳基胺。双(N-芳基)取代的草酰胺是优于N-芳基-N'-烷基取代或双(N-烷基)取代的草酰胺的配体。配体中芳环的电子性质和空间性质对其效率都很重要。
Dinuclear Tin(II) Complex of a Bulky cis-Oxamide: Synthesis, Characterization, Crystal Structure, and DFT Studies
作者:Marisol Ibarra-Rodríguez、H. V. Rasika Dias、Víctor M. Jiménez-Pérez、Blanca M. Muñoz-Flores、Angelina Flores-Parra、Sonia Sánchez
DOI:10.1002/zaac.201200212
日期:2012.8
The reaction of the di-lithiated oxamide of 1 with two equivalents of SnCl2 provided the tin trans-oxamide 3. In solution, spectroscopic analysis suggests exclusively the formation of a trans-oxamide (trans-3). However, the solid state shows an atypical cis-oxamide (cis-3), where the oxamide fragment acts as an anti-Janus head ligand. An 119Sn-NMR variable temperature experiment ([D8]THF) of the trans-oxamide