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14.661 Aktuelle Fachpublikationen in Chemistry - A European Journal

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Synthesis and Structure of a Longitudinally Twisted Hexacene

19.01.2018 | Robert G. Clevenger, Bharat Kumar, Elizabeth M. Menuey, Kathleen Victoria Kilway, Chemistry - A European Journal, 2018

The addition of phenyllithium to a polycyclic quinone, 9,11,12,21,22,24‐hexaphenyltetrabenzo[a,c,n,p]hexacene‐10,23‐di‐one (10), followed by SnCl2‐mediated reduction of the diol intermediate, yielded 9,10,11,12,21,22,23,24‐octaphenyltetrabenzo‐[a,c,n,p]hexacene (4). Crystallographic analysis of ...

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Rewiring chemical networks based on dynamic dithioacetal and disulfide bonds

18.01.2018 | Gaston Orrillo, Agustina La-Venia, Escalante Andrea, Ricardo L.E. Furlan, Chemistry - A European Journal, 2018

The control of the connectivity between nodes of synthetic networks is still largely unexplored. To address this point we take advantage of a simple dynamic chemical system with two exchange levels that are mutually connected and can be activated simultaneously or sequentially. Dithioacetals and ...

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Versatile Modes of Cooperative B‐H Bond Activation Reactions in Ruthenium Carbene Complexes: Addition, Ring‐opening and Insertion

18.01.2018 | Scharf T. Lennart, Julia Weismann, Kai-Stephan Feichtner, Felix Lindl, Viktoria H. Gessner, Chemistry - A European Journal, 2018

Cooperative B‐H bond activation reactions with thio‐ and iminophosphoryl tethered ruthenium carbene complexes are reported. The complexes show surprisingly different reactivities towards the commonly employed boranes CatBH, PinBH and BH3∙LB as a result of different modes of metal ligand ...

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Versatile Modes of Cooperative B‐H Bond Activation Reactions in Ruthenium Carbene Complexes: Addition, Ring‐opening and Insertion

18.01.2018 | Scharf T. Lennart, Julia Weismann, Kai-Stephan Feichtner, Felix Lindl, Viktoria H. Gessner, Chemistry - A European Journal, 2018

Cooperative B‐H bond activation reactions with thio‐ and iminophosphoryl tethered ruthenium carbene complexes are reported. The complexes show surprisingly different reactivities towards the commonly employed boranes CatBH, PinBH and BH3∙LB as a result of different modes of metal ligand ...

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Remote C‐H Activation of Various N‐Heterocycles Using a Single Template

18.01.2018 | Guoqiang Yang, Dajian Zhu, Peng Wang, Ri-Yuan Tang, Jin-Quan Yu, Chemistry - A European Journal, 2018

A single simple ortho‐sulfonyl benzonitrile template was developed to achieve remote C‐H olefination of six different classes of N‐heterocycles. We demonstrate that, by varying precatalysts and conditions, the same template can be applied to the remote C‐H activation of six structurally distinct ...

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Twisted charge‐transfer antennas for ultra‐bright terbium(III) and dysprosium(III) bioprobes.

17.01.2018 | Anh Thy Bui, Amandine Roux, Alexei Grichine, Alain Duperray, Chantal Andraud, Olivier Maury, Chemistry - A European Journal, 2018

The design of original twisted charge transfer antennas where a non planar geometry is enforced thanks to one or two bulky ortho‐Me substituents allows us to prepare the corresponding ultra‐bright Tb(III) and Dy(III) bioprobes. The brightness of the Tb(III) derivative compares well with that of ...

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Laterally and Temporally Controlled Intracellular Staining by Light‐Triggered Release of Encapsulated Fluorescent Markers

17.01.2018 | Karsten Kantner, Joanna Rejman, Karl V. L. Kraft, Mahmoud G. Soliman, Mikhail V. Zyuzin, Alberto Escudero, Pablo del ..., Chemistry - A European Journal, 2018

Abstract Fluorescent molecular markers were encapsulated. The capsules were additionally modified with plasmonic nanoparticles. The encapsulated markers were endocytosed by cells. Upon light stimulation the plasmonic nanoparticles generated heat, which opened the encapsulation and transiently ...

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Ligand‐ and Metal‐Based Reactivity of a Neutral Ruthenium Diolefin Diazadiene Complex; The Innocent, the Guilty, and the Suspicious

17.01.2018 | Vivek Sinha, Bruno Pribanic, Bas de Bruin, Monica Trincado, Hansjörg Grützmacher, Chemistry - A European Journal, 2018

Coordination of the diazadiene diolefin ligand trop2dad to ruthenium leads to various complexes of composition [Ru(trop2dad)(L)]. DFT studies indicate that the closed‐shell singlet (CSS), open‐shell singlet (OSS) and triplet electronic structures of this species are close in energy, with the OSS ...

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Brønsted Acid‐Catalyzed Tandem Cyclizations of Tryptamine‐Ynamides Yielding 1H‐Pyrrolo[2,3‐d]carbazole Derivatives

17.01.2018 | Yanshi Wang, Jingsheng Lin, Xiaoyu Wang, Guanghui Wang, Xinhang Zhang, Bo Yao, Yuandong Zhao, Pengfei Yu, Bin Lin, Y ..., Chemistry - A European Journal, 2018

A highly efficient novel method for the construction of the core tetracyclic motif of numerous biologically active indole alkaloids was described. The cyclization precursors were easily prepared from tryptamine derivatives in five steps with excellent yields. The full potential of the developed ...

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Brønsted Acid‐Catalyzed Tandem Cyclizations of Tryptamine‐Ynamides Yielding 1H‐Pyrrolo[2,3‐d]carbazole Derivatives

17.01.2018 | Yanshi Wang, Jingsheng Lin, Xiaoyu Wang, Guanghui Wang, Xinhang Zhang, Bo Yao, Yuandong Zhao, Pengfei Yu, Bin Lin, Y ..., Chemistry - A European Journal, 2018

A highly efficient novel method for the construction of the core tetracyclic motif of numerous biologically active indole alkaloids was described. The cyclization precursors were easily prepared from tryptamine derivatives in five steps with excellent yields. The full potential of the developed ...

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