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      Gold(I)‐Catalyzed Synthesis of Indenes and Cyclopentadienes: Access to (±)‐Laurokamurene B and the Skeletons of the Cycloaurenones and Dysiherbols

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          Abstract

          The formal (3+2) cycloaddition between terminal allenes and aryl or styryl gold(I) carbenes generated by a retro‐Buchner reaction of 7‐substituted 1,3,5‐cycloheptatrienes led to indenes and cyclopentadienes, respectively. These cycloaddition processes have been applied to the construction of the carbon skeleton of the cycloaurenones and the dysiherbols as well as to the total synthesis of (±)‐laurokamurene B.

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          Most cited references72

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          Indene-C(60) bisadduct: a new acceptor for high-performance polymer solar cells.

          Polymer solar cells (PSCs) are commonly composed of a blend film of a conjugated polymer donor and a soluble C(60) derivative acceptor sandwiched between an ITO anode and a low-workfunction metal cathode. Poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C-61-butyric acid methyl ester (PCBM) are the most widely used donor and acceptor materials, respectively. However, the low LUMO energy level of PCBM limits the open circuit voltage (V(oc)) of the P3HT-based PSCs to ca. 0.6 V. Here we synthesized a new soluble C(60) derivative, indene-C(60) bisadduct (ICBA), with a LUMO energy level 0.17 eV higher than that of PCBM. The PSC based on P3HT with ICBA as acceptor shows a higher V(oc) of 0.84 V and higher power conversion efficiency (PCE) of 5.44% under the illumination of AM1.5, 100 mW/cm(2), while the PSC based on P3HT/PCBM displays a V(oc) of 0.58 V and PCE of 3.88% under the same experimental conditions. The results indicate that ICBA is an alternative high-performance acceptor and could be widely used in high-performance PSCs.
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            Fullerene derivative acceptors for high performance polymer solar cells.

            Polymer solar cells (PSCs) are composed of a blend film of a conjugated polymer donor and a soluble fullerene derivative acceptor sandwiched between a PEDOT : PSS coated ITO positive electrode and a low workfunction metal negative electrode. The conjugated polymer donor and the fullerene derivative acceptor are the key photovoltaic materials for high performance PSCs. For the acceptors, although [6,6]-phenyl-C(61)-butyric acid methyl ester (PC(60)BM) and its corresponding C(70) derivative PC(70)BM are dominantly used as the acceptors in PSC at present, several series of new fullerene derivatives with higher-lying LUMO energy level and better solubility were reported in recent years for further improving the power conversion efficiency of the PSCs. In this perspective paper, we reviewed the recent research progress on the new fullerene derivative acceptors, including various PC(60)BM-like C(60) derivatives, PC(60)BM bisadduct, PC(70)BM bisadduct, indene-C(60) bisadduct and indene-C(70) bisadduct, trimetallic nitride endohedral fullerenes and other C(60) derivatives with multi side chains. The synthesis and physicochemical properties of PC(60)BM and PC(70)BM were also introduced considering the importance of the two fullerene acceptors.
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              Chiral cyclopentadienyl ligands as stereocontrolling element in asymmetric C-H functionalization.

              Metal complexes coordinated by a single cyclopentadienyl (Cp) ligand are widely used, versatile catalysts, but their application to asymmetric reactions has been hindered by the difficulty of designing Cp substituents that effectively bias the coordination sphere. Here, we report on a class of simple C(2)-symmetric Cp derivatives that finely control the spatial arrangement of the transiently coordinated reactants around the central metal atom. Rhodium(III) complexes bearing these ligands proved to be highly enantioselective catalysts for directed carbon-hydrogen (C-H) bond functionalizations of hydroxamic acid derivatives.
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                Author and article information

                Contributors
                aechavarren@iciq.es
                Journal
                Angew Chem Int Ed Engl
                Angew. Chem. Int. Ed. Engl
                10.1002/(ISSN)1521-3773
                ANIE
                Angewandte Chemie (International Ed. in English)
                John Wiley and Sons Inc. (Hoboken )
                1433-7851
                1521-3773
                11 October 2017
                13 November 2017
                : 56
                : 46 ( doiID: 10.1002/anie.v56.46 )
                : 14591-14595
                Affiliations
                [ 1 ] Institute of Chemical Research of Catalonia (ICIQ) Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
                [ 2 ] Departament de Química Analítica i Química Orgànica Universitat Rovira i Virgili C/ Marcel⋅li Domingo s/n 43007 Tarragona Spain
                Author information
                http://orcid.org/0000-0001-6808-3007
                Article
                ANIE201708947
                10.1002/anie.201708947
                5698700
                28941059
                3fda63ee-79a0-47e6-99a6-3614f3c9f148
                © 2017 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA.

                This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

                History
                : 30 August 2017
                Page count
                Figures: 12, Tables: 4, References: 87, Pages: 5, Words: 0
                Funding
                Funded by: H2020 European Research Council
                Award ID: Advanced Grant No. 321066
                Funded by: MINECO/FEDER
                Award ID: CTQ2016-75960-P
                Funded by: Severo Ochoa Excellence Accreditation
                Award ID: SEV-2013-0319
                Categories
                Communication
                Communications
                Synthetic Methods
                Custom metadata
                2.0
                anie201708947
                November 13, 2017
                Converter:WILEY_ML3GV2_TO_NLMPMC version:5.2.6 mode:remove_FC converted:22.11.2017

                Chemistry
                cycloaddition,cyclopentadienes,gold catalysis,indenes,total synthesis
                Chemistry
                cycloaddition, cyclopentadienes, gold catalysis, indenes, total synthesis

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