Oxo/Imido Heterometathesis Reactions Catalyzed by a Silica-Supported Tantalum Imido Complex
作者:Pavel A. Zhizhko、Anton A. Zhizhin、Olga A. Belyakova、Yan V. Zubavichus、Yuriy G. Kolyagin、Dmitry N. Zarubin、Nikolai A. Ustynyuk
DOI:10.1021/om4001499
日期:2013.7.8
partially dehydroxylated at 300 °C leads to the formation of the surface imido complex (≡SiO)2Ta(═NtBu)(CH2CMe2Ph) as a major species, which was characterized with EXAFS, 13C CP/MAS NMR, diffuse reflectance FTIR, elemental analyses, and chemical reactivity. The obtained material acts as an efficient heterogeneous catalyst for various oxo/imido heterometathesis transformations: imidation of ketones and DMF with
接枝的Ta(= N吨卜)(CH 2 CME 2 PH)3到二氧化硅上,在300℃的引线部分脱羟基的表面酰亚胺复合物(≡SiO)的形成的表面2的Ta(= N吨卜)(CH主要成分为2 CMe 2 Ph),并通过EXAFS,13 C CP / MAS NMR,漫反射FTIR,元素分析和化学反应进行了表征。所获得的材料用作用于各种氧代/酰亚胺heterometathesis变换的高效多相催化剂:酮的酰亚胺化和DMF与N- sulfinylamines和缩合N-亚磺胺转化为硫二亚胺,异氰酸苯酯转化为二苯基碳二亚胺。