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 imidocomplex (≡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。
Catalytic Oxo/Imido Heterometathesis by a Well-Defined Silica-Supported Titanium Imido Complex
作者:Pavel A. Zhizhko、Andrey V. Pichugov、Nikolai S. Bushkov、Florian Allouche、Anton A. Zhizhin、Dmitry N. Zarubin、Nikolai A. Ustynyuk
DOI:10.1002/anie.201804346
日期:2018.8.20
gives the well‐defined silica‐supported Ti imido complex (≡SiO)Ti(=NtBu)(Me2Pyr)(py)2, which is fully characterized by IR and solid‐state NMR spectroscopy as well as elemental and mass balance analyses. While stoichiometric imido‐transfer reactivity is typical for Ti imides, the obtained surface complex is unique in that it enables catalytic transformations involving Ti imido and oxo intermediates. In
将Ti(= N t Bu)(Me 2 Pyr)2(py)2(Me 2 Pyr = 2,5-二甲基吡咯基,py =吡啶)接枝到在700°C下部分脱羟基的二氧化硅表面上,得到定义明确的二氧化硅支持的钛亚氨基络合物(≡SiO)Ti(= N t Bu)(Me 2 Pyr)(py)2,通过IR和固态NMR光谱以及元素和质量平衡分析进行了全面表征。尽管化学计量的酰亚胺转移反应是钛酰亚胺的典型特征,但所获得的表面配合物却是独特的,因为它能够进行涉及钛酰亚胺和氧代中间体的催化转化。特别是,它可以有效地催化羰基化合物与N的酰亚胺化亚磺胺通过氧代/亚氨基异复分解。
An imido-transfer reaction of aldehydes with N-sulfinylamines using vanadium and molybdenum oxochlorides as catalysts
作者:Anton A. Zhizhin、Dmitry N. Zarubin、Nikolai A. Ustynyuk
DOI:10.1016/j.tetlet.2007.11.131
日期:2008.1
Vanadium and molybdenumoxochlorides were found to be efficient catalysts for imido-transfer between aldehydes and N-sulfinylamines.