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18,390 Newest Publications in angewandte chemie international edition

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Catalytic and Atom Economic Csp3 ‐ Csp3 Bond Formation α‐to Nitrogen. Alkyl Tantalum Ureates for Hydroaminoalkylation

13-Jan-2018 | Rebecca C. DiPucchio, Sorin-Claudiu Rosca, Laurel Schafer, Angewandte Chemie International Edition, 2018

Atom‐economic and regioselective Csp3‐Csp3 bond formation has been achieved by rapid C‐H alkylation of unprotected secondary arylamines with unactivated alkenes. The combination of Ta(CH2SiMe3)3Cl2, and a ureate N,O‐chelating ligand salt gives an in situ prepared catalytic system that can ...

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Stereodivergent Synthesis of Tetrahydrofuroindoles via Pd‐Catalyzed Asymmetric Dearomative Formal [3+2] Cycloaddition Reactions

13-Jan-2018 | Shuli You, Qiang Cheng, Fang Zhang, Yue Cai, Yin-Long Guo, Angewandte Chemie International Edition, 2018

Stereodivergent synthesis of tetrahydrofuroindoles via palladium‐catalyzed asymmetric dearomative formal [3+2] cycloaddition of nitroindoles with epoxybutenes was developed. Polarity of solvent was found to play as the key role on the switch of diastereoselectivity. In toluene, good to excellent ...

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C=O***Isothiouronium Interaction Dictates Enantiodiscrimination in Acylative Kinetic Resolution of Tertiary Heterocyclic Alcohols

12-Jan-2018 | Mark Greenhalgh, Samuel Smith, Daniel Walden, James Taylor, Zamira Brice, Emily Robinson, Charlene Fallan, David Cor ..., Angewandte Chemie International Edition, 2018

A combination of experimental and computational studies have identified a C=O***isothiouronium interaction as key to efficient enantiodiscrimination in the kinetic resolution of tertiary heterocyclic alcohols bearing up to three potential recognition motifs at the stereogenic tertiary carbinol ...

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An Exceptionally Close, Non‐Bonded Hydrogen‐Hydrogen Contact with Strong Through‐Space Spin‐Spin Coupling

12-Jan-2018 | Yonglong Xiao, Joel T. Mague, Robert A. Pascal, Angewandte Chemie International Edition, 2018

Condensation of 1,8,13‐tris(mercaptomethyl)triptycene and tris(bromomethyl)methane yields an in,in‐cyclophane with two inwardly directed methine groups. Based on X‐ray analysis and DFT and MP2 calculations, the hydrogen‐hydrogen non‐bonded contact distance is estimated to be 1.50‐1.53 Å. In ...

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Benzonorcorrole Ni(II) Complexes: Enhancement of Paratropic Ring Current and Singlet Diradical Character by Benzo‐Fusion

12-Jan-2018 | Takuya Yoshida, Kohtaro Takahashi, Yuki Ide, Ryohei Kishi, Jun-ya Fujiyoshi, Sangsu Lee, Yuya Hiraoka, Dongho Kim, M ..., Angewandte Chemie International Edition, 2018

Fused benzene rings to antiaromatic compounds generally improve their stability but attenuate their antiaromaticity. Here we report the opposite case. We have synthesized Ni(II) benzonorcorroles and elucidated the effect of benzo‐fusion on the antiaromaticity. The benzo‐fusion resulted in ...

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Tertiary‐Alcohol‐Directed Functionalization of Remote C(sp3)−H Bonds by Sequential Hydrogen Atom and Heteroaryl Migrations

12-Jan-2018 | Xinxin Wu, Mingyang Wang, Leitao Huan, Dongping Wang, Jinwei Wang, Chen Zhu, Angewandte Chemie International Edition, 2018

Abstract Reported for the first time is a tertiary‐alcohol‐guided heteroarylation of remote C(sp3)−H bonds. The mild and direct generation of alkoxyl radicals from alcohols is enabled by visible‐light photocatalysis. A remote hydrogen atom and heteroaryl migration sequence are involved in the ...

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Tetrablock Metallopolymer Electrochromes

12-Jan-2018 | Didier Astruc, Haibin Gu, Roberto Ciganda, Patricia Castel, Sergio Moya, Ricardo Hernandez, Jaime Ruiz, Angewandte Chemie International Edition, 2018

Multi‐block polymers are highly desirable for their addressable functions that are both unique and complementary among the blocks. With metal‐containing polymers, the goal is even more challenging insofar as the metal properties may considerably extend the materials functions to sensing, ...

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Configurational Isomerism in Polyoxovanadates

12-Jan-2018 | Lisa Mahnke, Aleksandar Kondinski, Ulrike Warzok, Christian Näther, Jan van Leusen, Christoph Schalley, Kirill Yu. ..., Angewandte Chemie International Edition, 2018

A water‐soluble derivative of the polyoxovanadate {V15E6O42} (E = semimetal) archetype enables the study of cluster shell rearrangements driven by supramolecular interactions. A reaction unique to E = Sb, induced exclusively by ligand metathesis in peripheral [NiII(ethylenediamine)] counterions, ...

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Configurational Isomerism in Polyoxovanadates

12-Jan-2018 | Lisa Mahnke, Aleksandar Kondinski, Ulrike Warzok, Christian Näther, Jan van Leusen, Christoph Schalley, Kirill Yu. ..., Angewandte Chemie International Edition, 2018

A water‐soluble derivative of the polyoxovanadate {V15E6O42} (E = semimetal) archetype enables the study of cluster shell rearrangements driven by supramolecular interactions. A reaction unique to E = Sb, induced exclusively by ligand metathesis in peripheral [NiII(ethylenediamine)] counterions, ...

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Catalytic Asymmetric Dearomatization of Indolyl Dihydropyridines via Enamine Isomerization/Spirocyclization/Transfer Hydrogenation Sequence

12-Jan-2018 | Shuli You, Zi-Lei Xia, Chao Zheng, Shou-Guo Wang, Angewandte Chemie International Edition, 2018

A highly efficient synthesis of enantioenriched spiroindolines by catalytic asymmetric dearomatization of indolyl dihydropyridines via chiral phosphoric acid catalyzed enamine isomerization/spirocyclization/transfer hydrogenation sequence has been developed. This reaction proceeds under mild ...

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