Preparation of Tremorine and Gemini Surfactant Precursors with Cationic Ethynyl-Bridged Digold Catalysts
作者:Abdessamad Grirrane、Eleuterio Álvarez、Hermenegildo García、Avelino Corma
DOI:10.1002/chem.201605269
日期:2017.2.24
Acetylide‐bridged cationic digold(I) L1 and L2 complexes were isolated and characterised by means of single‐crystal X‐ray structure analysis and their spectroscopic properties. Iodine in the acetylene reagent deactivates the AuI catalyst by formation of the less active iodido‐bridged cationic digold(I) L1 complex, which was fully characterised by single‐crystal X‐ray crystal structure analysis and spectroscopy
在一个单锅,三步,双催化A 3偶联反应中合成了Tremorine和Gemini表面活性剂的前体,并通过结构和光谱方法对其进行了表征。阳离子[Au I(L1)] SbF 6络合物与中性L2–和L3–Au I双(三氟甲磺酰基)亚氨酸酯络合物(L1,L2 =布赫瓦尔德型联芳基膦; L3 =三苯膦)相比,具有更高的活性。双A 3乙炔基三甲基硅烷,仲胺(环状,脂肪族或芳香族)与甲醛的偶联。溶剂通过甲硅烷基乙炔的甲硅烷基化或通过卤化物阴离子使催化剂失活而影响催化性能。分离并通过单晶X射线结构分析及其光谱性质对乙炔桥联的阳离子digold(I)L1和L2络合物进行了表征。乙炔试剂中的碘通过形成活性较低的碘代桥联阳离子digdig(I)L1络合物而使Au I催化剂失活,该络合物通过单晶X射线晶体结构分析和光谱学得到充分表征。用作催化剂的金配合物的膦配体的性质会影响所形成的阳离子乙炔基桥联的Au I的稳定性和活性2