Halogen Addition to Simple Alkenes in Ether SolventsRobert Pavlis
Homolytic addition of thiocyanogen to alkenes with at least three methyl groups or two phenyl groups on the double bond gives vicinal dithiocyanates and/or thiocyanato-isothiocyanates. The addition to (E)- and (Z)- PhCH=CHPh is non-stereospecific, but the thiocyanato-isothiocyanates derived ...
Halocyclization of alkenes is a powerful bond-forming tool in synthetic organic chemistry and a key step in natural product biosynthesis, but catalyzing halocyclization with high enantioselectivity remains a challenging task. Identifying suitable enzymes that catalyze enantioselective halocyclization of simple...
The additions to aryl alkenes are trans-stereoselective and regiospecific, yielding the Markownikov-orientated α-isothiocyanato-β-thiocyanates. A heterolytic mechanism involving a two-step, kinetically controlled addition, with the formation of a cyano-sulfonium ion intermediate, e.g., 35, in ...
读音:美[´hælədʒənz]英[´hælədʒənz] 英汉翻译近义词典英英词典发音词典 halogens中文翻译 卤族 halogens是什么意思 网络卤素; 卤族; 卤素类 词组短语 1.Freehalogens游离卤素 2.Extractable organichalogens可提取有机卤素 ...
The practical and efficient incorporation of fluoroalkyl moieties from commercially available fluoroalkyl halides into molecules is appealing but still challenging. Herein, we disclose a base-induced three-component coupling employing unactivated alkenes, fluoroalkyl iodides and diazonium salts. A thermally ...
Formal SiH4 chemistry using stable and easy-to-handle surrogates. Nat. Chem. 7, 816–822 (2015). Article CAS PubMed Google Scholar Xie, K. & Oestreich, M. Decarbonylative transfer hydrochlorination of alkenes and alkynes based on a B(C6F5)3‐initiated Grob fragmentation. Angew. Chem. Int...
Titanium-catalyzed addition of perfluoroalkyl iodides to alkenes ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a Chem... CR Davis,DJ Burton,ZY Yang - 《Journal of Fluorine Chemistry》 被引量: 55...
E2 elimination of H1-Br and H2-Br leads to two enantiomeric alkenes. As the starting material is meso-, and protons, H1 and H2, can be related to each other by a mirror plane; elimination of H1-Br and H2-Br is equally preferred leading to a racemic mixture of alkenes. anti-...
Markovnikov addition of halogen acids to alkenes appears to be governed by charge distribution in...States that L.J. Saethre, T.D.Thomas, and S. Svensson, researchers from the University of Bergen, Norway, determined the charge distribution in simple alkenes using high-resolution photoelectron ...