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。
Synthesis, Photophysical Properties, and Molecular Aggregation of Gold(I) Complexes Containing Carbon-Donor Ligands
作者:Andy Lok-Fung Chow、Man-Ho So、Wei Lu、Nianyong Zhu、Chi-Ming Che
DOI:10.1002/asia.201000499
日期:2011.2.1
A series of gold(I) complexes with N‐heterocyclic carbene (NHC) and acetylide ligands, namely [Au(NHC1)(C≡CAr)] (NHC1=1‐(9‐anthracenylmethyl)‐3‐(n)‐butylimidazol‐2‐ylidene; 1 b–1 g), [Au(NHC2)(C≡CAr)] (NHC2=1,3‐diethylimidazol‐2‐ylidene; 2 b–2 f) and [Au(C≡NAr)2]+ (C≡NAr=arylisocyanide; 3 a–3 f) have been synthesized. At room temperature, most of these gold(I) complexes are emissive in the solid state
一系列具有N-杂环卡宾(NHC)和乙炔配体的金(I)配合物,即[Au(NHC 1)(C≡CAr)](NHC 1 = 1-(9-蒽基甲基)-3-(n) -丁基咪唑-2-亚基; 1 b – 1 g),[Au(NHC 2)(C≡CAr)](NHC 2 = 1,3-二乙基咪唑-2-亚基; 2 b – 2 f)和[Au( C≡NAr)2 ] +(C≡NAr=芳基异氰化物;3 a – 3 f)已经合成。在室温下,这些金(I)络合物中的大多数在固态和溶液中以纳秒至亚微秒范围内的寿命发射。络合物的排放1 b– 1 g溶液分配给NHC配体的1 π–π *激发态,而2 b – 2 f和3 a – 3 f的激发态本质上是磷光的。还研究了复杂的复合物3a的溶剂变色现象。配合物1b中,1 d,3,和3e的聚集成结晶纳米线在新鲜制备的THF /水分散体。的X射线晶体学数据表明,图1b和1 d具有分子间π-π和C H⋅⋅⋅π相互作用;
Activation parameters and mechanism of the deamination of N-substituted quinone monoimines and di-imines
作者:Ulrich Nickel、Walther Jaenicke
DOI:10.1039/p29800001601
日期:——
activation are strongly negative for k′ and strongly positive for k″. The activationparameters of the acid and alkaline deamination of N-substitutedquinonedi-imines were also measured. With regard to the activation entropies similar results were found as for the quinonemonoimines. For all deaminations a common mechanism with a preceding solvation equilibrium is proposed.
使用紫外光谱,通过停止流方法在278至323 K之间的温度,pH在1至9的pH范围内,通过水溶液测量了六个N-取代的醌单亚胺的脱氨速率。观测到的速率常数由k = k '[H 2 O] + k ” [OH – ]给出;ķ '和ķ “由12个数量级不同。k ′和k ′的激活焓几乎相等。活化的熵是强负对ķ '和强阳性ķ “。酸和碱脱氨的活化参数还测量了N-取代的醌二亚胺。关于活化熵,发现与醌单亚胺相似的结果。对于所有脱氨基,提出了具有预先溶剂化平衡的通用机理。
Pd/NHC-catalyzed cross-coupling reactions of nitroarenes