Gold(III) NHC Complexes for Catalyzing Dihydroalkoxylation and Hydroamination Reactions
作者:Ashwin G. Nair、Roy T. McBurney、Mark R. D. Gatus、Samantha C. Binding、Barbara A. Messerle
DOI:10.1021/acs.inorgchem.7b02161
日期:2017.10.2
Furthermore, [LAu(III)Cl3] catalyzed intra- and intermolecular hydroamination reactions, achieving good to excellent conversions. [LAu(III)Cl3] is a more efficient catalyst than a gold(I) analogue, [LAu(I)Cl]. The dependence of the quantity of weakly coordinating anion [BArF4]− ((3,5-trifluoromethyl)phenyl borate) present on catalysis efficiency was probed for the dihydroalkoxylation reaction. X-ray diffraction
N-杂环卡宾基半不稳定配体与两个侧重吡唑臂(1,3-双((1 H-吡唑-3-基)甲基)-2,3-二氢-1 H-咪唑的金(III)络合物,LH)被合成。络合物[ L Au(III)Cl 3 ]是在室温下甚至在0℃下催化该反应的促进二氢烷氧基化的极好的催化剂。[ L Au(III)Cl 3 ]是迄今为止报道的炔二醇螺环化最有效的催化剂之一。此外,[ L Au(III)Cl 3 ]催化了分子内和分子间加氢胺化反应,实现了良好的转化率。[ L Au(III)Cl3 ]是一种比金(I)类似物[ L Au(I)Cl]更有效的催化剂。对于二氢烷氧基化反应,探查了存在的弱配位阴离子[BAr F 4 ] -((3,5-三氟甲基)苯基硼酸酯)的量对催化效率的依赖性。单晶的X射线衍射分析表明,金配合物[ L Au(III)Cl 3 ]和[ L Au(I)Cl]的固态结构分别显示了预期的正方形平面和线性配位几何形状。