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Yoshigoe Y, Tanji Y, Hata Y, Osakada K, Saito S, Kayahara E, Yamago S, Tsuchido Y, Kawai H. Dynamic Au-C σ-Bonds Leading to an Efficient Synthesis of [ n]Cycloparaphenylenes ( n = 9-15) by Self-Assembly. JACS AU 2022; 2:1857-1868. [PMID: 36032535 PMCID: PMC9400051 DOI: 10.1021/jacsau.2c00194] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The transmetalation of the digold(I) complex [Au2Cl2(dcpm)] (1) (dcpm = bis(dicyclohexylphosphino)methane) with oligophenylene diboronic acids gave the triangular macrocyclic complexes [Au2(C6H4) x (dcpm)]3 (x = 3, 4, 5) with yields of over 70%. On the other hand, when the other digold(I) complex [Au2Cl2(dppm)] (1') (dppm = bis(diphenylphosphino)methane) was used, only a negligible amount of the triangular complex was obtained. The control experiments revealed that the dcpm ligand accelerated an intermolecular Au(I)-C σ-bond-exchange reaction and that this high reversibility is the origin of the selective formation of the triangular complexes. Structural analyses and theoretical calculations indicate that the dcpm ligand increases the electrophilicity of the Au atom in the complex, thus facilitating the exchange reaction, although the cyclohexyl group is an electron-donating group. Furthermore, the oxidative chlorination of the macrocyclic gold complexes afforded a series of [n]cycloparaphenylenes (n = 9, 12, 15) in 78-88% isolated yields. The reorganization of two different macrocyclic Au complexes gave a mixture of macrocyclic complexes incorporating different oligophenylene linkers, from which a mixture of [n]cycloparaphenylenes with various numbers of phenylene units was obtained in good yields.
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Affiliation(s)
- Yusuke Yoshigoe
- Department
of Chemistry, Faculty of Science, Tokyo
University of Science, 1-3 Kagurazaka,Shinjuku-ku, Tokyo 162-8601, Japan
| | - Yohei Tanji
- Department
of Chemistry, Faculty of Science, Tokyo
University of Science, 1-3 Kagurazaka,Shinjuku-ku, Tokyo 162-8601, Japan
| | - Yusei Hata
- Department
of Chemistry, Faculty of Science, Tokyo
University of Science, 1-3 Kagurazaka,Shinjuku-ku, Tokyo 162-8601, Japan
| | - Kohtaro Osakada
- Laboratory
for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259, Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Shinichi Saito
- Department
of Chemistry, Faculty of Science, Tokyo
University of Science, 1-3 Kagurazaka,Shinjuku-ku, Tokyo 162-8601, Japan
| | - Eiichi Kayahara
- Institute
for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Shigeru Yamago
- Institute
for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Yoshitaka Tsuchido
- Department
of Chemistry, Faculty of Science, Tokyo
University of Science, 1-3 Kagurazaka,Shinjuku-ku, Tokyo 162-8601, Japan
| | - Hidetoshi Kawai
- Department
of Chemistry, Faculty of Science, Tokyo
University of Science, 1-3 Kagurazaka,Shinjuku-ku, Tokyo 162-8601, Japan
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Kazem-Rostami M. A nitrogen-based chiral catenane for enantioenriching photocatalytic aerobic oxidation. NEW J CHEM 2022. [DOI: 10.1039/d2nj03732g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Tröger's base's chirality merges catenanes’ photosensitizing characteristics to introduce the first nitrogen-based chiral hetero[2]catenane that proceeds enantioenriching photocatalytic aerobic oxidations.
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Affiliation(s)
- Masoud Kazem-Rostami
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA
- Faculty of Science and Engineering, Macquarie University, North Ryde, NSW 2109, Australia
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