Synthesis of specifically nitrogen-15- and carbon-13-labeled antitumor (2-haloethyl)nitrosoureas. The study of their conformations in solution by nitrogen-15 and carbon-13 nuclear magnetic resonance electronic control in their aqueous decomposition
Thienopyrimidine-2,4-dione derivatives and intermediates thereof
申请人:Ortho Pharmaceutical Corporation
公开号:US04670560A1
公开(公告)日:1987-06-02
The synthesis of thienopyrimidine-2,4-dione derivatives and their urea intermediates is described. The novel urea intermediates and thienopyrimidine-2,4-dione derivatives are generally vasodilating agents and anti-hypertensive agents. The compounds are useful as cardiovascular agents.
4,5‐Dihydro‐1,2,3‐oxadiazole: A Very Elusive Key Intermediate in Various Important Chemical Transformations
作者:Klaus Banert、Neeraj Singh、Benjamin Fiedler、Joachim Friedrich、Marcus Korb、Heinrich Lang
DOI:10.1002/chem.201502326
日期:2015.10.19
4,5‐Dihydro‐1,2,3‐oxadiazoles are postulated to be keyintermediates in the industrial synthesis of ketones from alkenes, in the alkylation of DNA in vivo, and in the decomposition of N‐nitrosoureas; they are also a subject of great interest for theoretical chemists. In the presented report, the formation of 4,5‐dihydro‐1,2,3‐oxadiazole and the subsequent decay into secondary products have been studied
推测4,5-二氢-1,2,3-恶二唑是从烯烃工业合成酮,体内DNA烷基化以及N-亚硝基脲分解的关键中间体。它们也是理论化学家非常感兴趣的主题。在本报告中,已通过NMR监测分析研究了4,5-二氢-1,2,3-恶二唑的形成及其随后降解为副产物的过程。现在,通过1 H,13 C和15 N NMR光谱以及在非常低的温度下进行的相关2D实验,已经证实了逃避特性难以捉摸的特性。我们用适当取代的N进行的实验在非极性条件下使用th(I)醇盐作为碱的亚硝基脲回答了有关4,5-二氢-1,2,3-恶二唑的存在及其副产物的重要问题。
A viologen-urea-based anion receptor: Colorimetric sensing of dicarboxylate anions
Abstract Compound 1 bearing urea and viologen groups has been designed and synthesized. It could be used as a colorimetric receptor for dicarboxylate anions due to the significant color changes of the solution upon the addition of dicarboxylates. More importantly, the color changes were related to the chain lengths of the dicarboxylates tested. UV–vis, 1 H NMR and HRMS studies demonstrated that receptor
摘要设计并合成了具有脲基和紫精基团的化合物1。由于加入二羧酸盐后溶液的显着颜色变化,它可用作二羧酸盐阴离子的比色受体。更重要的是,颜色变化与所测试的二羧酸酯的链长有关。紫外可见,1 H NMR和HRMS研究表明,受体1利用氢键和静电相互作用与这些阴离子形成1:1化学计量的配合物。此外,EPR还检测了络合过程中阳离子自由基1 +的生成。
2-[Trifluoroethylamine]oxazolines
申请人:Science Union et Cie
公开号:US04378366A1
公开(公告)日:1983-03-29
This invention relates to trifluorethylamines and to a process for producing the same. These trifluorethylamines are substituted on the nitrogen atom with a lower alkyl or a cyclo lower alkyl radical. They are endowed with interesting pharmacological properties.