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Griwatz JH, Kessler ML, Wegner HA. Continuous-Flow Synthesis of Cycloparaphenylene Building Blocks on a Large Scale. Chemistry 2023; 29:e202302173. [PMID: 37534817 DOI: 10.1002/chem.202302173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 08/02/2023] [Accepted: 08/03/2023] [Indexed: 08/04/2023]
Abstract
The synthesis of [n]cycloparaphenylenes ([n]CPPs) and similar nanohoops is usually based on combining building blocks to a macrocyclic precursor, which is then aromatized in the final step. Access to those building blocks in large amounts will simplify the synthesis and studies of CPPs as novel functional materials for applications. Herein, we report a continuous-flow synthesis of key CPP building blocks by using versatile synthesis techniques such as electrochemical oxidation, lithiations and Suzuki cross-couplings in self-built reactors on up-to kilogram scale.
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Affiliation(s)
- Jan H Griwatz
- Institute of Organic Chemistry, Justus Liebig University Giessen, Heinrich-Buff-Ring 17, 35392, Giessen, Germany
- Center for Materials Research, Justus Liebig University Giessen, Heinrich-Buff-Ring 16, 35392, Giessen, Germany
| | - Mika L Kessler
- Institute of Organic Chemistry, Justus Liebig University Giessen, Heinrich-Buff-Ring 17, 35392, Giessen, Germany
| | - Hermann A Wegner
- Institute of Organic Chemistry, Justus Liebig University Giessen, Heinrich-Buff-Ring 17, 35392, Giessen, Germany
- Center for Materials Research, Justus Liebig University Giessen, Heinrich-Buff-Ring 16, 35392, Giessen, Germany
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2
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Zhang Y, Pun SH, Miao Q. The Scholl Reaction as a Powerful Tool for Synthesis of Curved Polycyclic Aromatics. Chem Rev 2022; 122:14554-14593. [PMID: 35960873 DOI: 10.1021/acs.chemrev.2c00186] [Citation(s) in RCA: 58] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The past decade has witnessed remarkable success in the synthesis of curved polycyclic aromatics through Scholl reactions which enable oxidative aryl-aryl coupling even in company with the introduction of significant steric strain. These curved polycyclic aromatics are not only unique objects of structural organic chemistry in relation to the nature of aromaticity but also play an important role in bottom-up approaches to precise synthesis of nanocarbons of unique topology. Moreover, they have received considerable attention in the fields of supramolecular chemistry and organic functional materials because of their interesting properties and promising applications. Despite the great success of Scholl reactions in synthesis of curved polycyclic aromatics, the outcome of a newly designed substrate in the Scholl reaction still cannot be predicted in a generic and precise manner largely due to limited understanding on the reaction mechanism and possible rearrangement processes. This review provides an overview of Scholl reactions with a focus on their applications in synthesis of curved polycyclic aromatics with interesting structures and properties and aims to shed light on the key factors that affect Scholl reactions in synthesizing sterically strained polycyclic aromatics.
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Affiliation(s)
- Yiqun Zhang
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Sai Ho Pun
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Qian Miao
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
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Cheung KY, Segawa Y, Itami K. Synthetic Strategies of Carbon Nanobelts and Related Belt-Shaped Polycyclic Aromatic Hydrocarbons. Chemistry 2020; 26:14791-14801. [PMID: 32572996 DOI: 10.1002/chem.202002316] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Indexed: 11/07/2022]
Abstract
The development of carbon nanobelts and related belt-shaped polycyclic aromatic hydrocarbons has gained momentum in recent years. This Minireview focuses on the synthetic strategies used in constructing these aesthetically appealing molecular nanocarbons. Examples of carbon nanobelts and related belt-shaped polycyclic aromatic hydrocarbons reported in recent years as well as some representative synthetic attempts in earlier times are discussed.
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Affiliation(s)
- Kwan Yin Cheung
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Chikusa, Nagoya, 464-8602, Japan
| | - Yasutomo Segawa
- Graduate School of Science, Nagoya University, Chikusa, Nagoya, 464-8602, Japan.,JST-ERATO, Itami Molecular Nanocarbon Project, Chikusa, Nagoya, 464-8602, Japan.,Institute for Molecular Science, Myodaiji, Okazaki, 444-8787, Japan.,Department of Structural Molecular Science, SOKENDAI (The Graduate University for Advanced Studies), Myodaiji, Okazaki, 444-8787, Japan
| | - Kenichiro Itami
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Chikusa, Nagoya, 464-8602, Japan.,Graduate School of Science, Nagoya University, Chikusa, Nagoya, 464-8602, Japan.,JST-ERATO, Itami Molecular Nanocarbon Project, Chikusa, Nagoya, 464-8602, Japan.,Institute of Chemistry, Academia Sinica, Nankang, Taipei 115, Taiwan (ROC
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Wang J, Miao Q. A Tetraazapentacene–Pyrene Belt: Toward Synthesis of N-Doped Zigzag Carbon Nanobelts. Org Lett 2019; 21:10120-10124. [DOI: 10.1021/acs.orglett.9b04116] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jinlian Wang
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Qian Miao
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
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Abdulkarim A, Strunk KP, Bäuerle R, Beck S, Makowska H, Marszalek T, Pucci A, Melzer C, Jänsch D, Freudenberg J, Bunz UHF, Müllen K. Small Change, Big Impact: The Shape of Precursor Polymers Governs Poly-p-phenylene Synthesis. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00792] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ali Abdulkarim
- InnovationLab, Speyerer Str. 4, 69115 Heidelberg, Germany
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Karl-Philipp Strunk
- Kirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 227, 69120 Heidelberg, Germany
- Centre for Advanced Materials, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 225, 69120 Heidelberg, Germany
| | - Rainer Bäuerle
- InnovationLab, Speyerer Str. 4, 69115 Heidelberg, Germany
- Kirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 227, 69120 Heidelberg, Germany
| | - Sebastian Beck
- InnovationLab, Speyerer Str. 4, 69115 Heidelberg, Germany
- Kirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 227, 69120 Heidelberg, Germany
| | - Hanna Makowska
- Department of Molecular Physics, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
| | - Tomasz Marszalek
- Department of Molecular Physics, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Annemarie Pucci
- InnovationLab, Speyerer Str. 4, 69115 Heidelberg, Germany
- Kirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 227, 69120 Heidelberg, Germany
- Centre for Advanced Materials, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 225, 69120 Heidelberg, Germany
| | - Christian Melzer
- InnovationLab, Speyerer Str. 4, 69115 Heidelberg, Germany
- Kirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 227, 69120 Heidelberg, Germany
- Centre for Advanced Materials, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 225, 69120 Heidelberg, Germany
| | - Daniel Jänsch
- InnovationLab, Speyerer Str. 4, 69115 Heidelberg, Germany
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Jan Freudenberg
- InnovationLab, Speyerer Str. 4, 69115 Heidelberg, Germany
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Uwe H. F. Bunz
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
- Centre for Advanced Materials, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 225, 69120 Heidelberg, Germany
| | - Klaus Müllen
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
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