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9.059 Aktuelle Fachpublikationen in Organic & Biomolecular Chemistry

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Silver(I)-catalyzed sequential hydroamination and Prins type cyclization for the synthesis of fused benzo--sultams

03.07.2018 | B. Maheshwar Rao; J. S. Yadav; B. Sridhar; B. V. Subba Reddy, Organic & Biomolecular Chemistry, 2018

An intramolecular annulation strategy has been developed for the synthesis of tetrahydrobenzo[e]pyrano[4,3-c][1,2]thiazine derivatives by means of coupling of aldehydes with 2-(4-hydroxybut-1-yn-1-yl)-N-arylsulfonamides using a catalytic amount of silver hexafluoroantimonate in toluene at 80 °C. ...

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An efficient iodine pentoxide-triggered iodocarbocyclizations for the synthesis of iodooxindoles in water

03.07.2018 | Ming-Zhong Zhang; Xin Wang; Ming-Ying Gong; Lin Chen; Wenbin Shi; Shu-Hua He; Yong Jiang; Tieqiao Chen, Organic & Biomolecular Chemistry, 2018

An efficient iodocarbocyclization of alkenes for the synthesis of iodooxindoles has been developed. This reaction proceeds in a chemoselective manner and shows excellent tolerance of various functional groups, including a chemosensitive hydroxymethyl group. Nonmetal inorganic iodine pentoxide was ...

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Synthesis of N-arylsulfonamides via Fe-promoted reaction of sulfonyl halides with nitroarenes in an aqueous medium

03.07.2018 | Jun Jiang; Sheng Zeng; De Chen; Chaozhihui Cheng; Wei Deng; Jiannan Xiang, Organic & Biomolecular Chemistry, 2018

A fascinating Fe-promoted protocol for the synthesis of N-arylsulfonamides has been developed. Starting from commercially available nitroarenes and sulfonyl chlorides, moderate to excellent yields of the corresponding N-arylsulfonamides can be obtained. In particular, Fe dust serves as the sole ...

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Total Synthesis of the Proposed Structure of Talarolide A

03.07.2018 | Margaret A Brimble; Shengping Zhang; Luis Manuel M De Leon Rodriguez; Ivanhoe K. H. Leung; Paul Harrs; Renjie Huang, Organic & Biomolecular Chemistry, 2018

The proposed structure of talarolide A, a cycloheptapeptide featuring a hydroxamate moiety within the peptide backbone, was successfully synthesized. An initial attempt to synthesize a linear peptide precursor containing a C-terminal N-benzyloxy glycine residue was problematic due to an an ...

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Recent advances in the annulation of Morita–Baylis–Hillman adducts

03.07.2018 | Neng-Jun Zhong; Yi-Zhan Wang; Liang Cheng; Dong Wang; Li Liu, Organic & Biomolecular Chemistry, 2018

In this review, we summarize some of the most recent advances in the construction of cyclic compounds from the annulation of Morita–Baylis–Hillman (MBH) adducts, which have demonstrated their importance by possessing diverse functional groups. Significant examples including [3 + 2], [3 + 3], [3 + ...

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Asymmetric Organocatalytic Synthesis of Chiral 3,3-Disubstituted Oxindoles via 1,6-Conjugate Addition Reaction

03.07.2018 | Abdul Rahman; Qiaoxia Zhou; Xufeng Lin, Organic & Biomolecular Chemistry, 2018

A highly efficient synthesis of chiral 3,3-disubstituted oxindoles was developed by using a chiral spirocyclic phosphoric acid catalyzed 1,6-conjugate addition reaction of para-quinone methoids derived from N-unprotected isatins with indoles. The reaction proceeds under mild reaction conditions ...

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An efficient t-BuOK promoted C3-chalcogenylation of indoles with dichalcogenides

03.07.2018 | Yuanzu Yu; Yan Zhou; Zengqiang Song; Guang Liang, Organic & Biomolecular Chemistry, 2018

A versatile and efficient method for the synthesis of 3-chalcogenyl-indoles from indoles and dichalcogenides employing t-BuOK as a promoter at room temperature has been achieved. The present protocol exhibited a broad functional group tolerance. Diverse 3-sulfenyl- and 3-selenyl-indoles were ...

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Protein-protein interactions of Human Glyoxalase II: findings of a reliable docking protocol

03.07.2018 | Roberta Galeazzi; Emiliano Laudadio; Emanuele Falconi; Luca Massaccesi; Luisa Ercolani; Giovanna Mobbili; Cristina ..., Organic & Biomolecular Chemistry, 2018

Glyoxalase II (GlxII) is an antioxidant glutathione-dependent enzyme, which catalyzes the hydrolysis of S-D-lactoylglutathione to form D-lactic acid and glutathione (GSH). The last product is the most important thiol reducing agent present in all eukaryotic cells that have mitochondria and ...

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Direct Metal-free, Base Catalysed sp2 C-H Functionalization in Sulfonamidation of 1,4-Naphthoquinones Using Sulfonyl azides

03.07.2018 | Pitchumani Kasi; Ramanathan Devenderan, Organic & Biomolecular Chemistry, 2018

A novel metal-free, base catalysed sp2 C-H functionalization in the sulfonyl amidation of 1,4-naphthoquinones via a [3+2] cycloaddition reaction using sulfonyl azides under mild reaction conditions is reported. In this straightforward, atom- and step-economical protocol, the active alkene moiety ...

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1,8-Diamidocarbazoles: an easily tuneable family of fluorescent anion sensors and transporters

03.07.2018 | Krzysztof Marek Bąk; Krzysztof Chabuda; Helena Montes; Roberto Quesada; Michał Jan Chmielewski, Organic & Biomolecular Chemistry, 2018

The synthesis, structure and anion recognition properties of an extensive, rationally designed series of bisamide derivatives of 1,8-diaminocarbazole and 1,8-diamino-3,6-dichlorocarbazole are described. Despite simple structures and the presence of only three hydrogen bond donors, such compounds ...

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