hydrosilylation reaction of aldehydes using 4a (0.03 mol%) has been demonstrated to be significantly more active than rhenium catalysts previously reported in the literature. The data suggest that electron-withdrawing substituents at the diamido amine ligand increase the catalytic efficiency of the complexes. Excellent yields were achieved at ambient temperature under neat conditions using dimethylphenylsilane.
一系列新颖的阳离子Re(III)络合物[(
DAAm)Re(CO)(NCCH 3)2 ] [X] [
DAAm = N,N-双(2-芳基
氨基乙基)
甲胺; 芳基= C 6 F 5(a),Mes(b)] [X = OTf(2),BAr F 4 [BAr F 4 =四[3,5-(三
氟甲基)苯基]
硼酸酯](3),BF 4(4),PF 6(5)]及其类似物[(
DAmA)Re(CO)(Cl)2 ] [
DAmA = N,N-双(2-芳基胺乙基)甲基
氨基;合成了芳基= C 6 F 5 ](6)。已证明使用4a(0.03 mol%)进行醛的氢化
硅烷化反应的催化效率比以前在文献中报道的rh催化剂更具活性。数据表明,二
氨基胺
配体上的吸电子取代基提高了配合物的催化效率。使用二甲基苯基
硅烷在环境温度和纯净条件下获得了优异的收率。该反应提供高达9200的TON和高达126h -1的TOF 。进行了动力学和机理研究,数据表明该反应是通过