一些新的烯烃烷氧基铊(III)化合物,C6H5C(R1)(OR3)CH2Tl(OCOR2)2 [I],是由苯乙烯和α-甲基苯乙烯与乙酸铊(III)和异丁酸在各种醇中制备的。I(R1=H) 与碘化铜、溴化铜、氯化铜、氰化物和硫氰酸铜反应生成相应的烷基卤化物和拟卤化物,C6H5CH(OR3)CH2X[II],在各种有机溶剂中,乙腈是首选溶剂为了准备II。钾盐的加入对提高Ⅱ的收率有显着效果。卤代和假卤代脱卤发生在铊先前与烷基碳相连的位置。提出了一种离子协调的分子间方案作为制备 II 的反应机制。简要讨论了 I 的核磁共振和红外光谱数据。
Comparative study of the vicinal functionalization of olefins with 2:1 bromide/bromate and iodide/iodate reagents
作者:Manoj K. Agrawal、Subbarayappa Adimurthy、Bishwajit Ganguly、Pushpito K. Ghosh
DOI:10.1016/j.tet.2009.01.095
日期:2009.4
halohydrins, halo methyl ethers, and halo acetates from olefins using 2:1 Br−/BrO3− and I−/IO3− reagents. In many cases both reagents afforded products selectively in high yields. The highest halogen atom efficiencies attained were 97% and 93% for Br−/BrO3− and I−/IO3−, respectively. Of the two reagents, I−/IO3− was established to be the preferred reagent for vicinal functionalization of linear alkenes and
NaIO<sub>4</sub>-Mediated Selective Oxidative Halogenation of Alkenes and Aromatics Using Alkali Metal Halides
作者:Gajanan K. Dewkar、Srinivasarao V. Narina、Arumugam Sudalai
DOI:10.1021/ol0358206
日期:2003.11.1
[reaction: see text] NaIO(4) oxidizes alkali metal halides efficiently in aqueous medium to halogenate alkenes and aromatics and produce the corresponding halo derivatives in excellent regio and stereoselectivity. The system also demonstrates the asymmetric version of bromo hydroxylation using beta-cyclodextrin complexes, resulting in moderate ee.
Spiroalkene carboxamide derivatives and their use as chemokine receptor modulators
申请人:Ares Trading SA
公开号:EP2508526A1
公开(公告)日:2012-10-10
The present invention is directed to compounds of Formula (I) below, which are antagonists to the chemoattractant cytokine receptor 2 (CCR2), and/or 5 (CCR5), pharmaceutical compositions, and methods for use thereof.
[EN] SPIROALKENE CARBOXAMIDE DERIVATIVES AND THEIR USE AS CHEMOKINE RECEPTOR MODULATORS<br/>[FR] DÉRIVÉS DE SPIROALCÈNECARBOXAMIDE ET LEUR UTILISATION COMME MODULATEURS DE RÉCEPTEURS DE CHEMOKINES
申请人:ARES TRADING SA
公开号:WO2012130915A1
公开(公告)日:2012-10-04
The present invention is directed to compounds of Formula (I) below, which are antagonists to the chemoattractant cytokine receptor 2 (CCR2), and/or 5 (CCR5), pharmaceutical compositions, and methods for use thereof.
Electrochemical bromofunctionalization of alkenes in a flow reactor
作者:Jakob Seitz、Thomas Wirth
DOI:10.1039/d1ob01302e
日期:——
of brominating reagents. The electrochemical oxidation of bromide to bromine is a viable strategy to reduce waste by avoiding chemical oxidants. Furthermore, the in situ generation of reactive intermediates minimizes the risk of hazardous reagents. In this work, we investigate the electrochemical generation of bromine from hydrobromic acid in a flow electrochemicalreactor. Various alkenes could be converted