Copper(II) ion exchanged AlSBA-15: A versatile catalyst for intermolecular hydroamination of terminal alkynes with aromatic amines
作者:G SHANBHAG、T JOSEPH、S HALLIGUDI
DOI:10.1016/j.jcat.2007.06.007
日期:2007.9.10
hydroamination reaction offers a very attractive route for the synthesis of alkylated amines and their derivatives with no byproduct formation. AlSBA-15 was synthesized by isomorphous substitution of aluminum into the framework of SBA-15, which induces the Brönsted acid sites, and these were exchanged with metal ions such as Cu2+, Zn2+, and Pd2+. The catalysts were characterized by XRD, N2-sorption,
加氢胺化反应为烷基化胺及其衍生物的合成提供了非常诱人的途径,而不会形成副产物。通过将铝同构取代到SBA-15的骨架中来合成AlSBA-15,从而诱导布朗斯台德酸位,并与金属离子(例如Cu 2 +,Zn 2+和Pd 2+)交换。通过XRD,N 2吸附,SEM,TEM,通过FT-IR吡啶吸附进行的酸度测量,H 2 -TPR,27 Al MAS NMR和29 Si MAS NMR来表征催化剂。苯乙炔(PhAc)与2,4-二甲苯胺的加氢胺化已用作测试反应,该反应可得到N-(1-苯乙叉基)-2,4-二甲基苯胺没有副产物的形成。CuAlSBA-15和CuAlMCM-41在PhAc的加氢胺化反应中显示出的活性是Cu-粘土和Cu-β的三倍,这是由于介孔载体中Cu 2+具有中等的路易斯酸度。还用不同的炔烃和胺测定了CuAlSBA-15的性能,以评估催化剂在加氢胺化反应中的一般适用性。