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Song Z, Zhu K, Jiang H, Gong H, Ye Z, Zhang F. Synthesis of 1,3-Dioxepine-Fused (Tricyclic) Bispyrazoles Involved with Pyrazolone Derivatives and Dichloromethane. J Org Chem 2022; 87:4284-4290. [PMID: 35262363 DOI: 10.1021/acs.joc.1c03121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A simple and novel method for the synthesis of novel 1,3-dioxepine-fused (tricyclic) bispyrazoles is described. It involves a Cs2CO3-mediated O-alkylation of readily available pyrazolone derivatives with dichloromethane as the methylene source followed by PhI(OAc)2-mediated intramolecular oxidative biheteroaryl coupling under mild conditions. This scalable protocol was applied for the preparation of valuable and novel 1,3-dioxepine-fused (tricyclic) bispyrazoles that could find applications in medicinal or material chemistry.
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Affiliation(s)
- Zongqiang Song
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Kai Zhu
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Hongqiang Jiang
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Hengfa Gong
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Zenghui Ye
- School of Pharmacy, Hangzhou Medical College, Hangzhou 310013, P. R. China
| | - Fengzhi Zhang
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, P. R. China.,School of Pharmacy, Hangzhou Medical College, Hangzhou 310013, P. R. China
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Shigemitsu H, Kawakami K, Nagata Y, Kajiwara R, Yamada S, Mori T, Kida T. Cyclodextrins with Multiple Pyrenyl Groups: An Approach to Organic Molecules Exhibiting Bright Excimer Circularly Polarized Luminescence. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202114700] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Hajime Shigemitsu
- Department of Applied Chemistry Graduate School of Engineering Osaka University 2-1 Yamadaoka Suita, 565–0871 Japan
- Frontier Research Base for Global Young Researchers Graduate School of Engineering Osaka University 2-1 Yamadaoka Suita, 565–0871 Japan
- Global Center for Medical Engineering and Informatics Osaka University 2-1 Yamadaoka Suita, 565–0871 Japan
- Integrated Frontier Research for Medical Science Division Institute for Open and Transdisciplinary Research Initiatives (OTRI) Osaka University Japan
| | - Kosei Kawakami
- Department of Applied Chemistry Graduate School of Engineering Osaka University 2-1 Yamadaoka Suita, 565–0871 Japan
| | - Yuuya Nagata
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD) Hokkaido University, Nishi 10, Kita Sapporo, 001–0021 Japan
| | - Rikuo Kajiwara
- Department of Applied Chemistry Graduate School of Engineering Osaka University 2-1 Yamadaoka Suita, 565–0871 Japan
| | - Shintaro Yamada
- Department of Applied Chemistry Graduate School of Engineering Osaka University 2-1 Yamadaoka Suita, 565–0871 Japan
| | - Tadashi Mori
- Department of Applied Chemistry Graduate School of Engineering Osaka University 2-1 Yamadaoka Suita, 565–0871 Japan
| | - Toshiyuki Kida
- Department of Applied Chemistry Graduate School of Engineering Osaka University 2-1 Yamadaoka Suita, 565–0871 Japan
- Integrated Frontier Research for Medical Science Division Institute for Open and Transdisciplinary Research Initiatives (OTRI) Osaka University Japan
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Shigemitsu H, Kawakami K, Kajiwara R, Yamada S, Mori T, Kida T, Nagata Y. Cyclodextrins with Multiple Pyrenyl Groups: An Approach to Organic Molecules Exhibiting Bright Excimer Circularly Polarized Luminescence. Angew Chem Int Ed Engl 2021; 61:e202114700. [PMID: 34783445 DOI: 10.1002/anie.202114700] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Indexed: 11/08/2022]
Abstract
Circularly polarized luminescence (CPL) has attracted much attention because of its potential for electronic and biological applications. Herein, we report a simple and effective approach to organic molecules exhibiting bright CPL by combining a chiral cyclic molecular scaffold and multiple excimer-enabling moieties. An a-cyclodextrin ( CyD ) scaffold was modified with six pyrenyl groups to obtain pyrene-cyclodextrins ( PCD s) in a one-step synthesis from commercially available compounds. The PCDs exhibited high molar extinction coefficients (ε ~ 10 5 M -1 cm -1 ), polarized emission with a good dissymmetry factor (| g lum | ~ 10 -2 ), and quantum yield ( Φ f ~ 0.5). Owing to the excellent photophysical properties of the PCDs, the circularly polarized luminescence brightness ( B CPL ) reached 340 M -1 cm -1 . Comprehensive photophysical and chiroptical studies of the PCD s with only five pyrene units and with linkers of various lengths connecting the CyD with the pyrene units revealed that the formation of a pyrene excimer in a spatially crowded environment is crucial for CPL anisotropy. This study paves the way for the development of bright CPL organic molecules.
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Affiliation(s)
- Hajime Shigemitsu
- Osaka University, Department of Applied Chemistry, 2-1 Yamadaoka, 565-0871, Suita, JAPAN
| | - Kosei Kawakami
- Osaka University: Osaka Daigaku, Department of Applied Chemistry, JAPAN
| | - Rikuo Kajiwara
- Osaka University School of Engineering Graduate School of Engineering: Osaka Daigaku Kogakubu Daigakuin Kogaku Kenkyuka, Department of Applied Chemistry, JAPAN
| | - Shintaro Yamada
- Osaka University School of Engineering Graduate School of Engineering: Osaka Daigaku Kogakubu Daigakuin Kogaku Kenkyuka, Department of Applied Chemistry, JAPAN
| | - Tadashi Mori
- Osaka University School of Engineering Graduate School of Engineering: Osaka Daigaku Kogakubu Daigakuin Kogaku Kenkyuka, Department of Applied Chemistry, JAPAN
| | - Toshiyuki Kida
- Osaka University School of Engineering Graduate School of Engineering: Osaka Daigaku Kogakubu Daigakuin Kogaku Kenkyuka, Department of Applied Chemistry, JAPAN
| | - Yuuya Nagata
- Hokkaido Daigaku, Institute for chemical reaction design and discovery, JAPAN
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Takaishi K, Murakami S, Iwachido K, Ema T. Chiral exciplex dyes showing circularly polarized luminescence: extension of the excimer chirality rule. Chem Sci 2021; 12:14570-14576. [PMID: 34881009 PMCID: PMC8580037 DOI: 10.1039/d1sc04403f] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 10/18/2021] [Indexed: 11/21/2022] Open
Abstract
A series of axially chiral binaphthyls and quaternaphthyls possessing two kinds of aromatic fluorophores, such as pyrenyl, perylenyl, and 4-(dimethylamino)phenyl groups, arranged alternately were synthesized by a divergent method. In the excited state, the fluorophores selectively formed a unidirectionally twisted exciplex (excited heterodimer) by a cumulative steric effect and exhibited circularly polarized luminescence (CPL). They are the first examples of a monomolecular exciplex CPL dye. This versatile method for producing exciplex CPL dyes also improved fluorescence intensity, and the CPL properties were not very sensitive to the solvent or to the temperature owing to the conformationally rigid exciplex. This systematic study allowed us to confirm that the excimer chirality rule can be applied to the exciplex dyes: left- and right-handed exciplexes with a twist angle of less than 90° exhibit (-)- and (+)-CPL, respectively.
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Affiliation(s)
- Kazuto Takaishi
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University Tsushima Okayama 700-8530 Japan
| | - Sho Murakami
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University Tsushima Okayama 700-8530 Japan
| | - Kazuhiro Iwachido
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University Tsushima Okayama 700-8530 Japan
| | - Tadashi Ema
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University Tsushima Okayama 700-8530 Japan
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Shyam Sundar M, Lo R, Dračínský M, Klepetářová B. Synthesis and Stereochemical Behavior of Dioxa[6]helicene Derivatives. ChemistrySelect 2021. [DOI: 10.1002/slct.202100583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- M. Shyam Sundar
- The Institute of Organic Chemistry and Biochemistry Czech Academy of Sciences Flemingovonáměstí 2 16610 Prague Czech Republic
| | - Rabindranath Lo
- The Institute of Organic Chemistry and Biochemistry Czech Academy of Sciences Flemingovonáměstí 2 16610 Prague Czech Republic
| | - Martin Dračínský
- The Institute of Organic Chemistry and Biochemistry Czech Academy of Sciences Flemingovonáměstí 2 16610 Prague Czech Republic
| | - Blanka Klepetářová
- The Institute of Organic Chemistry and Biochemistry Czech Academy of Sciences Flemingovonáměstí 2 16610 Prague Czech Republic
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Miki K, Noda T, Gon M, Tanaka K, Chujo Y, Mizuhata Y, Tokitoh N, Ohe K. Near‐Infrared Circularly Polarized Luminescence through Intramolecular Excimer Formation of Oligo(
p
‐phenyleneethynylene)‐Based Double Helicates. Chemistry 2019; 25:9211-9216. [DOI: 10.1002/chem.201901467] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Indexed: 12/16/2022]
Affiliation(s)
- Koji Miki
- Department of Energy and Hydrocarbon ChemistryGraduate School of EngineeringKyoto University Katsura Nishikyo-ku, Kyoto 615–8510 Japan
| | - Takeru Noda
- Department of Energy and Hydrocarbon ChemistryGraduate School of EngineeringKyoto University Katsura Nishikyo-ku, Kyoto 615–8510 Japan
| | - Masayuki Gon
- Department of Polymer ChemistryGraduate School of EngineeringKyoto University Katsura Nishikyo-ku, Kyoto 615-8510 Japan
| | - Kazuo Tanaka
- Department of Polymer ChemistryGraduate School of EngineeringKyoto University Katsura Nishikyo-ku, Kyoto 615-8510 Japan
| | - Yoshiki Chujo
- Department of Polymer ChemistryGraduate School of EngineeringKyoto University Katsura Nishikyo-ku, Kyoto 615-8510 Japan
| | - Yoshiyuki Mizuhata
- Institute for Chemical ResearchKyoto University Gokasho Uji, Kyoto 611-0011 Japan
| | - Norihiro Tokitoh
- Institute for Chemical ResearchKyoto University Gokasho Uji, Kyoto 611-0011 Japan
| | - Kouichi Ohe
- Department of Energy and Hydrocarbon ChemistryGraduate School of EngineeringKyoto University Katsura Nishikyo-ku, Kyoto 615–8510 Japan
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Merten C, Golub TP, Kreienborg NM. Absolute Configurations of Synthetic Molecular Scaffolds from Vibrational CD Spectroscopy. J Org Chem 2019; 84:8797-8814. [PMID: 31046276 DOI: 10.1021/acs.joc.9b00466] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Vibrational circular dichroism (VCD) spectroscopy is one of the most powerful techniques for the determination of absolute configurations (AC), as it does not require any specific UV/vis chromophores, no chemical derivatization, and no growth of suitable crystals. In the past decade, it has become increasingly recognized by chemists from various fields of synthetic chemistry such as total synthesis and drug discovery as well as from developers of asymmetric catalysts. This perspective article gives an overview about the most important experimental aspects of a VCD-based AC determination and explains the theoretical analysis. The comparison of experimental and computational spectra that leads to the final conclusion about the AC of the target molecules is described. In addition, the review summarizes unique VCD studies carried out in the period 2008-2018 that focus on the determination of unknown ACs of new compounds, which were obtained in its enantiopure form either through direct asymmetric synthesis or chiral chromatography.
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Affiliation(s)
- Christian Merten
- Ruhr Universität Bochum , Organische Chemie II , Universitätsstraße 150 , 44780 Bochum , Germany
| | - Tino P Golub
- Ruhr Universität Bochum , Organische Chemie II , Universitätsstraße 150 , 44780 Bochum , Germany
| | - Nora M Kreienborg
- Ruhr Universität Bochum , Organische Chemie II , Universitätsstraße 150 , 44780 Bochum , Germany
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