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Gold(III) NHC Complexes for Catalyzing Dihydroalkoxylation and Hydroamination Reactions
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2017-09-21 00:00:00 , DOI: 10.1021/acs.inorgchem.7b02161 Ashwin G. Nair 1 , Roy T. McBurney 1 , Mark R. D. Gatus 1 , Samantha C. Binding 1 , Barbara A. Messerle 1
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2017-09-21 00:00:00 , DOI: 10.1021/acs.inorgchem.7b02161 Ashwin G. Nair 1 , Roy T. McBurney 1 , Mark R. D. Gatus 1 , Samantha C. Binding 1 , Barbara A. Messerle 1
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A gold(III) complex of an N-heterocyclic carbene based hemilabile ligand with two pendant pyrazole arms (1,3-bis((1H-pyrazol-3-yl)methyl)-2,3-dihydro-1H-imidazole, LH) was synthesized. Complex [LAu(III)Cl3] is an excellent catalyst for promoting dihydroalkoxylation at room temperature, even catalyzing this reaction at 0 °C. [LAu(III)Cl3] is one of the most efficient catalysts reported to date for the spirocyclization of alkynyl diols. 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 analysis of single crystals demonstrated the solid-state structure of gold complexes [LAu(III)Cl3] and [LAu(I)Cl], which displayed the expected square-planar and linear coordination geometries, respectively.
中文翻译：
催化二氢烷氧基化和加氢胺化反应的NHC金（III）配合物
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。
更新日期：2017-09-21
中文翻译：
催化二氢烷氧基化和加氢胺化反应的NHC金（III）配合物
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。
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