The palladium‐catalyzed oxidative carbonylation of amines toward the synthesis of oxalamides has been established around 30 years ago and it usually needs the presence of (over)stoichiometric amounts of oxidant. In this work, the first transformation of this type in which the oxidant was replaced by visible light is described. The new approach uses a simple robust Pd complex, which can even be partially
Theoretical, Structural, Vibrational, NMR, and Thermal Evidence of the Inter- versus Intramolecular Hydrogen Bonding in Oxamides and Thiooxamides
作者:H. O. Desseyn、S. P. Perlepes、K. Clou、N. Blaton、B. J. Van der Veken、R. Dommisse、P. E. Hansen
DOI:10.1021/jp0401776
日期:2004.6.1
contribution describes the study of hydrogen bonding in secondary oxamides, monothiooxamides, and dithiooxamides by ab initio calculations, X-ray diffractions, NMR spectra, thermal analysis, and variable- temperature infrared and Raman spectroscopy. The results can all be interpreted as a function of the change in the strength and the nature of the hydrogen bonding by substituting oxygen for sulfur in the
该贡献描述了通过从头算计算、X 射线衍射、NMR 光谱、热分析以及变温红外和拉曼光谱法研究仲草酰胺、单硫代草酰胺和二硫代草酰胺中的氢键。通过在 CH 3-HNCOCONHCH 3 、CH 3HNCSCONHCH 3 、CH 3HNCSCSNHCH3 系列中用氧代替硫,并通过改变一系列草酰胺中的烷基 (RHNCOCNHR; R ) CH3 ,C 2H5 ,i C 3H7 ,t C 4H9)。在这项工作中,我们研究了两个系列原始化合物中氢键特征的变化。已经使用不同的技术研究了氢键。X 射线结构和从头算计算提供了直接信息,因为最可靠的标准是基于范德华半径 1 以及氢键所涉及的角度。2 振动光谱一直是氢键研究的主要实验方法,我们从温度相关的固态光谱中获得了非常有价值的信息,3-5 特别是在遇到溶解度问题时。浓度和温度相关的 NMR 光谱 6-23 尤其是焓证实了 X 射线和分子间和分子内特征之间的
IAP BIR domain binding compounds
申请人:Laurent Alain
公开号:US20070093428A1
公开(公告)日:2007-04-26
Disclosed is an isomer, enantiomer, diastereoisomer or tautomer of a compound represented by Formula I:
or a salt thereof, in which R
1
, R
2
, R
100
, R
200
, A, A
1
, B, B
1
, BG, n, Q and Q
1
are substituents described. Also disclosed is the use of compounds of Formula 1 to treat proliferative disorders.
NHE3-binding compounds and methods for inhibiting phosphate transport
申请人:ARDELYX, INC.
公开号:US10272079B2
公开(公告)日:2019-04-30
Provided are NHE3-binding and/or NHE3-modulating agents having activity as phosphate transport inhibitors, including inhibitors of phosphate transport in the gastrointestinal tract and the kidneys, and methods for their use as therapeutic or prophylactic agent.
Catalyst system for enhanced stereo-specificity of olefin polymerization and method for producing olefin polymer
申请人:Formosa Plastics Corporation, USA
公开号:US10822438B2
公开(公告)日:2020-11-03
Disclosed are a catalyst component for olefin polymerization comprising titanium, magnesium, a halogen, internal donors, in combination with a silane and oxalic acid diamides of the following formula:
An olefin polymerization catalyst system consisting of the solid catalyst component, an organoaluminum compound, and an optional external electron donor compound is also disclosed. Employment of both oxalic acid diamides and silane component in the presence of internal electron donors as an elements of solid Ziegler-Natta type catalyst composition enhances stereo-specificity while maintaining excellent catalyst activity and hydrogen response, in which the modified catalyst composition produces polypropylene with good productivity and higher stereo-specificity than catalyst composition without such modification.