Oxo/imido heterometathesis of N-sulfinylamines and carbonyl compounds catalyzed by silica-supported vanadium oxochloride
作者:Pavel A. Zhizhko、Anton A. Zhizhin、Dmitry N. Zarubin、Nikolai A. Ustynyuk、Dmitry A. Lemenovskii、Boris N. Shelimov、Leonid M. Kustov、Olga P. Tkachenko、Gayane A. Kirakosyan
DOI:10.1016/j.jcat.2011.07.011
日期:2011.10
with a higher vanadium content are contaminated with a significant amount of d1 vanadium species. The silica-supported vanadium complexes act as heterogeneous catalysts for oxo/imido heterometathesis between N-sulfinylamines and carbonyl compounds affording imines and SO2. Grafting VOCl3 onto silica leads to a dramatic enhancement of its catalytic activity. A novel water-free express method for preparation
通过无水接枝VOCl 3到二氧化硅表面上,制备了一系列二氧化硅负载的钒氧杂配合物。获得的材料已通过拉曼,漫反射FTIR(DRIFT)和UV-vis,51 V固态NMR和X射线光电子能谱,元素分析和N 2物理吸附进行了表征。发现低钒含量(1-5%)的样品主要由分离的四面体d 0单元(SiO)V(O)Cl 2组成,而钒含量较高的材料则被显着污染。 d 1的量钒物种。二氧化硅负载的钒络合物充当N-亚磺酰基胺与提供亚胺和SO 2的羰基化合物之间的羰基/亚胺基异位复分解反应的非均相催化剂。将VOCl 3接枝到二氧化硅上可大大提高其催化活性。已开发出一种新型的无水表达方法,用于制备多种醛和某些酮的亚胺。值得注意的是,这是过渡金属介导的酮的异复酰亚胺化的第一个例子。
Janda, Lubomir; Nguyen, Johnny; Patterson, Steven E., Journal of Heterocyclic Chemistry, 1992, vol. 29, # 7, p. 1753 - 1756
作者:Janda, Lubomir、Nguyen, Johnny、Patterson, Steven E.、Strekowski, Lucjan