A General Method for Copper-Catalyzed Arylation of Arene C−H Bonds
作者:Hien-Quang Do、Rana M. Kashif Khan、Olafs Daugulis
DOI:10.1021/ja805688p
日期:2008.11.12
A generalmethod for copper-catalyzedarylation of sp (2) C-Hbonds with p K a's below 35 has been developed. The method employs aryl halide as the coupling partner, lithium alkoxide or K 3PO 4 base, and DMF, DMPU, or mixed DMF/xylenes solvent. A variety of electron-rich and electron-poor heterocycles such as azoles, caffeine, thiophenes, benzofuran, pyridine oxides, pyridazine, and pyrimidine can
The present invention is a one-step method for efficiently converting carbon-hydrogen bonds into carbon-carbon bonds using a combination of aryl halides, a substrate, and a copper salt as catalyst. This method allows faster introduction of complex molecular entities, a process that would otherwise require many more steps. This invention is particularly relevant for the organic synthesis of complex molecules such as, but not limited to, pharmacophores and explosives.
Copper(II)-Mediated Intramolecular Cyclization of (Z)-Chalcogenoenynes: Synthesis of 3-Halochalcogenophene Derivatives
作者:Daniela A. Barancelli、Ricardo F. Schumacher、Marlon R. Leite、Gilson Zeni
DOI:10.1002/ejoc.201100992
日期:2011.11
We present our results on the cyclization of (Z)-chalcogenoenynes mediated by copper(II) salts to afford 3-halochalcogenophenes in satisfactory yields through an intramolecular 5-endo-dig cyclization. The methodology was carried out using CuCl2 at 50 °C or CuBr2 at room temperature under an ambient atmosphere. The reaction took place under very mild reaction conditions and tolerated considerable functionality
我们展示了由铜 (II) 盐介导的 (Z)-硫属元素烯环化的结果,通过分子内 5-endo-dig 环化以令人满意的产率提供 3-卤代硫属元素烯。该方法是在 50 °C 下使用 CuCl2 或在室温下在环境气氛下使用 CuBr2 进行的。该反应在非常温和的反应条件下进行并且耐受相当大的官能度。在钯催化的与硼酸的交叉偶联反应中,将一种 3-溴-硒吩衍生物用作底物,以良好的收率得到 Suzuki 型产物。
A study on the cellular and cytotoxic effects of S and Se heterocycles on the myeloid leukemia cell line PLB-985
作者:Niccole Auld、Krystal Flood、Tanay Kesharwani、Peter J. Cavnar