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17.819 Aktuelle Fachpublikationen in Journal of the American Chemical Society


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Traceless Silylation of β-C(sp3)–H Bonds of Alcohols via Perfluorinated Acetals

19.01.2018 | Ala Bunescu; Trevor W. Butcher; John F. Hartwig, Journal of the American Chemical Society, 2018

We report the silylation of primary C–H bonds located β to secondary and tertiary alcohols by exploiting perfluorinated esters as traceless directing groups. The conversion of a secondary or tertiary alcohol to a perfluoroalkyl ester and conversion of the ester to the corresponding silyl acetals ...


Unconventional Fragment Usage Enables a Concise Total Synthesis of (−)-Callyspongiolide

19.01.2018 | Francesco Manoni; Corentin Rumo; Liubo Li; Patrick G. Harran, Journal of the American Chemical Society, 2018

Journal of the American Chemical Society DOI: 10.1021/jacs.7b13591


1,2-Diol Dehydration by the Radical SAM Enzyme AprD4: A Matter of Proton Circulation and Substrate Flexibility

19.01.2018 | Wan-Qiu Liu; Patricia Amara; Jean-Marie Mouesca; Xinjian Ji; Oriane Renoux; Lydie Martin; Chen Zhang; Qi Zhang; Yvai ..., Journal of the American Chemical Society, 2018

Regiospecific dehydration of vicinal diols by enzymes is a difficult reaction that usually requires activation by dedicated organic cofactors. The enzymatic use of radical-based chemistry is an effective but challenging alternative as radical intermediates are difficult to control. Here we report ...


Amphiphilic π-Allyliridium C,O-Benzoates Enable Regio- and Enantioselective Amination of Branched Allylic Acetates Bearing Linear Alkyl Groups

19.01.2018 | Arismel Tena Meza; Thomas Wurm; Lewis Smith; Seung Wook Kim; Jason R. Zbieg; Craig E. Stivala; Michael J. Krische, Journal of the American Chemical Society, 2018

Journal of the American Chemical Society DOI: 10.1021/jacs.7b13482


Hidden Beneath the Surface: Origin of the Observed Enantioselective Adsorption on PdGa(111)

19.01.2018 | Aliaksandr V. Yakutovich; Johannes Hoja; Daniele Passerone; Alexandre Tkatchenko; Carlo A. Pignedoli, Journal of the American Chemical Society, 2018

We unravel the origin of the recently observed striking enantioselectivity of the PdGa(111) surface with respect to the adsorption of a small organic molecule, 9-ethynylphenanthrene, using first-principles calculations. It turns out that the key ingredient to understand the experimental evidence ...


Enzymatic Cleavage of Branched Peptides for Targeting Mitochondria

19.01.2018 | Hongjian He; Jiaqing Wang; Huaimin Wang; Ning Zhou; Dongsik Yang; Douglas R. Green; Bing Xu, Journal of the American Chemical Society, 2018

Most of the reported mitochondria-targeting molecules are lipophilic and cationic, and thus they may become cytotoxic with accumulation. Here we show enzymatic cleavage of branched peptides that carry negative charges for targeting mitochondria. Conjugating a well-established protein tag (i.e., ...


Ultrafast Observation of a Photoredox Reaction Mechanism: Photoinitiation in Organocatalyzed Atom-Transfer Radical Polymerization

19.01.2018 | Daisuke Koyama; Harvey J. A. Dale; Andrew J. Orr-Ewing, Journal of the American Chemical Society, 2018

Photoredox catalysis has driven a revolution in the field of organic chemistry, but direct mechanistic insights into reactions of genuine synthetic utility remain relatively scarce. Herein we report ultrafast time-resolved spectroscopic observation of a bimolecular organocatalyzed photoredox ...


Transmission Electron Microscopy Reveals Deposition of Metal Oxide Coatings onto Metal–Organic Frameworks

18.01.2018 | Michael S. Denny, Jr.; Lucas R. Parent; Joseph P. Patterson; Santosh Kumar Meena; Huy Pham; Patricia Abellan; Quenti ..., Journal of the American Chemical Society, 2018

Postsynthetic strategies for modifying metal–organic frameworks (MOFs) have proven to be an incredibly powerful approach for expanding the scope and functionality of these materials. Previously, we reported on the postsynthetic exchange (PSE) of metal ions and ligands in the University of Oslo ...


A Spectroscopic Study on the Nitrogen Electrochemical Reduction Reaction on Gold and Platinum Surfaces

18.01.2018 | Yao Yao; Shangqian Zhu; Haijiang Wang; Hui Li; Minhua Shao, Journal of the American Chemical Society, 2018

The electrochemical reduction of nitrogen to ammonia on Au-based catalysts showed a reasonably high Coulombic efficiency. The pathway of this promising reaction, however, is not clear partially due to the lack of information on reaction intermediates. Herein, surface-enhanced infrared absorption ...


Stereodivergent Allylation of Azaaryl Acetamides and Acetates by Synergistic Iridium and Copper Catalysis

17.01.2018 | Xingyu Jiang; Philip Boehm; John F. Hartwig, Journal of the American Chemical Society, 2018

We report stereodivergent allylic substitution reactions of allylic esters with prochiral enolates derived from azaaryl acetamides and acetates to form products from addition of the enolates at the most substituted carbon of an allyl moiety with two catalysts, a chiral metallacyclic iridium ...


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