Synthesis and characterization of o-fluorosulfinylaniline. A comparative vibrational study of fluorinated sulfinylaniline series
作者:Ana L. Páez Jerez、Diego J. Alonso de Armiño、Norma L. Robles
DOI:10.1039/c5nj02252e
日期:——
A complete vibrational study of a new fluoro substituted sulfinylaniline was performed in comparison with m- and p-isomers.
对一种新的氟代磺酰苯胺进行了完整的振动研究,与m-和p-异构体进行了比较。
N-Heterocyclic Carbene Catalysis: Enantioselective Formal [2+2] Cycloaddition of Ketenes and N-Sulfinylanilines
作者:Teng-Yue Jian、Lin He、Cen Tang、Song Ye
DOI:10.1002/anie.201102488
日期:2011.9.19
Sultam of swing: Both enantiomers of 1,2‐thiazetidin‐3‐one oxides were obtained in very good yields with excellent enantioselectivities when using N‐heterocyclic carbene catalysts (see scheme; M.S.=molecular sieves, TBS=tert‐butyldimethylsilyl). The products were easily converted into 3‐oxo‐β‐sultams, α‐mercapto amides, and β‐mercapto amines through oxidation or reduction.
摇摆的结果:使用N杂环卡宾催化剂时,1,2-噻嗪丁-3-氧化物的两种对映体均以非常高的收率获得,并具有出色的对映选择性(参见方案; MS =分子筛,TBS =叔丁基二甲基甲硅烷基)。产物可以通过氧化或还原轻松地转化为3-氧代-β-杜马酰胺,α-巯基酰胺和β-巯基胺。
Vanadium(V) imido chlorides and n-propoxides — Towards a rational design of vanadium imido precatalysts for ethylene polymerization
作者:Anatoliy S. Kayda、Andrey V. Rumyantsev、Sergey V. Zubkevich、Pavel A. Zhizhko、Rina U. Takazova、Vladislav A. Tuskaev、Svetlana Ch. Gagieva、Mihail I. Buzin、Stanislav S. Shatokhin、Galina G. Nikiforova、Viktor G. Vasil'ev、Alexander A. Pavlov、Daniele Saracheno、Elizaveta K. Melnikova、Kasim F. Magomedov、Nikolay A. Kolosov、Boris M. Bulychev
DOI:10.1016/j.jorganchem.2020.121665
日期:2021.2
and elemental analysis. The solid-state structure of complex V(=NArOMe)(OnPr)3 was established using X-ray. Vanadium(V) imido chlorides and n-propoxides exhibited similar moderate catalytic activities (320–547 kgPE·mol(V)−1·h−1·atm−1). The maximum catalytic activity (547 kgPE·mol(V)−1·h−1·atm−1) was achieved for (adamantylimido)vanadium(V) n-propoxide. The molecular weights of the resulting polyethylenes
钒(V)亚氨基配合物广泛用于烯烃聚合和低聚反应。在本报告中,我们介绍了一系列在亚氨基片段上具有各种取代基的钒(V)亚氨基配合物的合成和乙烯聚合反应的研究结果。通过N-亚磺酰基胺与VOCl 3或VO(O n Pr)3的相互作用,可以几乎定量地制备所有络合物,并使用1 H,13 C,51 V NMR和元素分析对其进行表征。使用X射线建立了复合物V(= NAr OMe)(O n Pr)3的固态结构。钒(V)亚氨基氯化物和正丙醇盐表现出类似适度的催化活性(320-547千克PE ·摩尔(V)-1 · ħ -1 ·大气压-1)。对于(金刚烷酰亚胺基)钒(V)正丙醇,达到了最大催化活性(547 kg PE · mol(V)-1 · h -1 · atm -1)。所得聚乙烯的分子量较高(M v = 3.7-6.5 · 10 5道尔顿)为亚氨基正丙氧基络合物相比于相应的亚氨基氯化物(M v = 2.1–5
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。
Synthesis of S(IV)‐Stereogenic Chiral Thio‐Oxazolidinones via Palladium‐Catalyzed Asymmetric [3+2] Annulations
Two Pd-catalyzed asymmetric [3+2] annulations are disclosed, providing a modular platform for the enantioselective synthesis of chiral thio-oxazolidinones. Preliminary mechanistic studies are performed to rationalize the observed enantio- and diastereo-controls.