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Kanbe A, Yokoi K, Yamada Y, Tsurui M, Kitagawa Y, Hasegawa Y, Ogata D, Yuasa J, Aoki S. Optical Resolution of Carboxylic Acid Derivatives of Homoleptic Cyclometalated Iridium(III) Complexes via Diastereomers Formed with Chiral Auxiliaries. Inorg Chem 2023; 62:11325-11341. [PMID: 37432912 PMCID: PMC10369494 DOI: 10.1021/acs.inorgchem.3c00685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Indexed: 07/13/2023]
Abstract
We report on a facile method for the optical resolution of cyclometalated iridium(III) (Ir(III)) complexes via diastereomers formed with chiral auxiliaries. The racemic carboxylic acids of Ir(III) complexes (fac-4 (fac-Ir(ppyCO2H)3 (ppy: 2-phenylpyridine)), fac-6 (fac-Ir(tpyCO2H)3 (tpy: 2-(4'-tolyl)pyridine)), and fac-13 (fac-Ir(mpiqCO2H)3 (mpiq: 1-(4'-methylphenyl)isoquinoline))) were converted into the diastereomers, Δ- and Λ-forms of fac-9 (from fac-6), fac-10 (from fac-4), fac-11 (from fac-6), and fac-14 (from fac-13), respectively, by the condensation with (1R,2R)-1,2-diaminocyclohexane or (1R,2R)-2-aminocyclohexanol. The resulting diastereomers were separated by HPLC (with a nonchiral column) or silica gel column chromatography, and their absolute stereochemistry was determined by X-ray single-crystal structure analysis and CD (circular dichroism) spectra. Spectra of all diastereomers of the Ir(III) complexes are reported. Hydrolysis of the ester moieties of Δ- and Λ-forms of fac-10, fac-11, and fac-14 gave both enantiomers of the corresponding carboxylic acid derivatives in the optically pure forms, Δ-fac and Λ-fac-4, -6, and -13, respectively.
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Affiliation(s)
- Azusa Kanbe
- Faculty
of Pharmaceutical Science, Tokyo University
of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Kenta Yokoi
- Faculty
of Pharmaceutical Science, Tokyo University
of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Yasuyuki Yamada
- Department
of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
- Research
Center for Materials Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
- JST,
PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Makoto Tsurui
- Graduate
School of Chemical Sciences and Engineering, Hokkaido University, N13W8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan
| | - Yuichi Kitagawa
- Faculty of
Engineering, Hokkaido University, Kita-13, Nishi-8, Kita-Ku, Sapporo, Hokkaido 060-8628, Japan
- Institute
for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Kita-21, Nishi-10, Kita-Ku, Sapporo, Hokkaido 001-0021, Japan
| | - Yasuchika Hasegawa
- Faculty of
Engineering, Hokkaido University, Kita-13, Nishi-8, Kita-Ku, Sapporo, Hokkaido 060-8628, Japan
- Institute
for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Kita-21, Nishi-10, Kita-Ku, Sapporo, Hokkaido 001-0021, Japan
| | - Daiji Ogata
- Faculty
of Science, Tokyo University of Science, 1-3 Kagurazaka,
Shinjuku-ku, Tokyo 162-8601, Japan
| | - Junpei Yuasa
- Faculty
of Science, Tokyo University of Science, 1-3 Kagurazaka,
Shinjuku-ku, Tokyo 162-8601, Japan
| | - Shin Aoki
- Faculty
of Pharmaceutical Science, Tokyo University
of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
- Research
Institute for Science and Technology (RIST), Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
- Research
Institute for Biomedical Science (RIBS), Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
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Aoki S, Yokoi K, Hisamatsu Y, Balachandran C, Tamura Y, Tanaka T. Post-complexation Functionalization of Cyclometalated Iridium(III) Complexes and Applications to Biomedical and Material Sciences. Top Curr Chem (Cham) 2022; 380:36. [PMID: 35948812 DOI: 10.1007/s41061-022-00401-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 06/20/2022] [Indexed: 11/24/2022]
Abstract
Cyclometalated iridium(III) (Ir(III)) complexes exhibit excellent photophysical properties that include large Stokes shift, high emission quantum yields, and microsecond-order emission lifetimes, due to low-lying metal-to-ligand charge transfer (spin-forbidden singlet-triplet (3MLCT) transition). As a result, analogs have been applied for research not only in the material sciences, such as the development of organic light-emitting diodes (OLEDs), but also for photocatalysts, bioimaging probes, and anticancer reagents. Although a variety of methods for the synthesis and the applications of functionalized cyclometalated iridium complexes have been reported, functional groups are generally introduced to the ligands prior to the complexation with Ir salts. Therefore, it is difficult to introduce thermally unstable functional groups such as peptides and sugars due to the harsh reaction conditions such as the high temperatures used in the complexation with Ir salts. In this review, the functionalization of Ir complexes after the formation of cyclometalated Ir complexes and their biological and material applications are described. These methods are referred to as "post-complexation functionalization (PCF)." In this review, applications of PCF to the design and synthesis of Ir(III) complexes that exhibit blue -red and white color emissions, luminescence pH probes, luminescent probes of cancer cells, compounds that induce cell death in cancer cells, and luminescent complexes that have long emission lifetimes are summarized.
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Affiliation(s)
- Shin Aoki
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, Tokyo, Japan. .,Research Institute for Science and Technology, Tokyo University of Science, Tokyo, Japan. .,Research Institute for Biomedical Sciences, Tokyo University of Science, Tokyo, Japan.
| | - Kenta Yokoi
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, Tokyo, Japan
| | - Yosuke Hisamatsu
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, Tokyo, Japan
| | - Chandrasekar Balachandran
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, Tokyo, Japan.,Research Institute for Biomedical Sciences, Tokyo University of Science, Tokyo, Japan
| | - Yuichi Tamura
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, Tokyo, Japan
| | - Tomohiro Tanaka
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, Tokyo, Japan
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Tamura Y, Hisamatsu Y, Kazama A, Yoza K, Sato K, Kuroda R, Aoki S. Stereospecific Synthesis of Tris-heteroleptic Tris-cyclometalated Iridium(III) Complexes via Different Heteroleptic Halogen-Bridged Iridium(III) Dimers and Their Photophysical Properties. Inorg Chem 2018; 57:4571-4589. [DOI: 10.1021/acs.inorgchem.8b00323] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Yuichi Tamura
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Yosuke Hisamatsu
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Ayami Kazama
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Kenji Yoza
- Bruker AXS K.K., 3-9 Moriya-cho, Yokohama, Kanagawa 221-0022, Japan
| | - Kyouhei Sato
- Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Reiko Kuroda
- Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Shin Aoki
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
- Division of Medical-Science-Engineering Cooperation, Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
- Imaging Frontier Center, Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
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Branzan R, Sünkel K. 2‐Pyridylmetallocenes, Part VI. Double Cycloplatination of 1,1′‐Dipyridylferrocene. Synthesis and Molecular Structure of σ‐{Pt
2
Cl
2
(DMSO)
2
[Fe[η
5
‐(C
5
H
3
(2‐C
5
H
4
N)
2
]
2
]}. Z Anorg Allg Chem 2017. [DOI: 10.1002/zaac.201700264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ramona Branzan
- Department of Chemistry Ludwig Maximilians University Munich Butenandtstr. 9 81377 Munich Germany
| | - Karlheinz Sünkel
- Department of Chemistry Ludwig Maximilians University Munich Butenandtstr. 9 81377 Munich Germany
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