共查询到20条相似文献,搜索用时 93 毫秒
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Cover Picture: Selective Oxidation of Alkyl‐Substituted Polyaromatics Using Ruthenium‐Ion‐Catalyzed Oxidation (Chem. Eur. J. 11/2015) 下载免费PDF全文
Ewa Nowicka Meenakshisundaram Sankar Robert L. Jenkins David W. Knight David J. Willock Graham J. Hutchings Manuel Francisco Stuart H. Taylor 《Chemistry (Weinheim an der Bergstrasse, Germany)》2015,21(11):4165-4165
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Dr. Ceri Hammond Dr. Robert L. Jenkins Dr. Nikolaos Dimitratos Dr. Jose Antonio Lopez‐Sanchez Dr. Mohd Hasbi ab Rahim Dr. Michael M. Forde Adam Thetford Dr. Damien M. Murphy Dr. Henk Hagen Dr. Eric E. Stangland Prof. Jacob M. Moulijn Dr. Stuart H. Taylor Dr. David J. Willock Prof. Graham J. Hutchings 《Chemistry (Weinheim an der Bergstrasse, Germany)》2012,18(49):15557-15557
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Xiaoguang Liu Dr. Xiaohong Chen Prof. Dr. Justin T. Mohr 《Chemistry (Weinheim an der Bergstrasse, Germany)》2016,22(7):2274-2277
A radical‐based strategy for regioselective γ‐C?C bond formation/oxa‐conjugate addition, forming the tetrahydrobenzofuran core common to many bioactive natural products is described. The technique utilizes readily available enone derivatives and 1,3‐dicarbonyl compounds as coupling partners in an oxidative formal [3+2] cycloaddition mediated by MnIII. The transformation delivers polycyclic products in good yields and proceeds with complete regiocontrol and excellent stereoselectivity. Sterically encumbered substrates are notably well‐tolerated and bond formation occurs readily to form neopentyl and all‐carbon quaternary centers in good yields. Several stereo‐ and chemoselective transformations of the products are described. 相似文献
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Back Cover: Visible‐Light‐Driven Water Oxidation by a Molecular Manganese Vanadium Oxide Cluster (Angew. Chem. Int. Ed. 21/2016) 下载免费PDF全文
Benjamin Schwarz Dr. Johannes Forster McKenna K. Goetz Duygu Yücel Claudia Berger Prof. Dr. Timo Jacob Prof. Dr. Carsten Streb 《Angewandte Chemie (International ed. in English)》2016,55(21):6344-6344
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Inside Cover: Room‐Temperature Carbide‐Derived Carbon Synthesis by Electrochemical Etching of MAX Phases (Angew. Chem. Int. Ed. 19/2014) 下载免费PDF全文
Maria R. Lukatskaya Joseph Halim Boris Dyatkin Michael Naguib Yulia S. Buranova Prof. Michel W. Barsoum Prof. Yury Gogotsi 《Angewandte Chemie (International ed. in English)》2014,53(19):4728-4728
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《Journal of mass spectrometry : JMS》2017,52(11):739-751
Singlet molecular oxygen (1O2) is generated in biological systems and reacts with different biomolecules. Proteins are a major target for 1O2, and His, Tyr, Met, Cys, and Trp are oxidized at physiological pH. In the present study, the modification of lysozyme protein by 1O2 was investigated using mass spectrometry approaches. The experimental findings showed methionine, histidine, and tryptophan oxidation. The experiments were achieved using [18O]‐labeled 1O2 released from thermolabile endoperoxides in association with nano‐scale liquid chromatography coupled to electrospray ionization mass spectrometry. The structural characterization by nLC‐MS/MS of the amino acids in the tryptic peptides of the proteins showed addition of [18O]‐labeling atoms in different amino acids. 相似文献
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A green and economical catalyst system, 4‐OH‐TEMPO/TCQ/TBN/HCl, for the aerobic oxidation of a broad range of primary and secondary alcohols to the corresponding carbonyl compounds has been developed. These reactions proceed without transition‐metals under mild conditions with excellent yields. 相似文献
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Herein, we developed a Ru(II)(BPGA) complex that could be used to catalyze chemo‐ and site‐selective C?H oxidation. The described ruthenium complex was designed by replacing one pyridyl group on tris(2‐pyridylmethyl)amine with an electron‐donating amide ligand that was critical for promoting this type of reaction. More importantly, higher reactivities and better chemo‐, and site‐selectivities were observed for reactions using the cis‐ruthenium complex rather than the trans‐one. This reaction could be used to convert sterically less hindered methyne and/or methylene C?H bonds of a various organic substrates, including natural products, into valuable alcohol or ketone products. 相似文献