1
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Kielty P, Chalmers BA, Farràs P, Smith DA, Aldabbagh F. Visible Light Activated Benzimidazolequinone Alkoxyamines of 1,1,3,3‐Tetramethylisoindolin‐2‐yloxyl (TMIO). European J Org Chem 2021. [DOI: 10.1002/ejoc.202101183] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Patrick Kielty
- School of Chemistry National University of Ireland Galway University Road Galway H91 TK33 Ireland
| | - Benjamin A. Chalmers
- School of Chemistry National University of Ireland Galway University Road Galway H91 TK33 Ireland
| | - Pau Farràs
- School of Chemistry National University of Ireland Galway University Road Galway H91 TK33 Ireland
| | - Dennis A. Smith
- School of Chemistry National University of Ireland Galway University Road Galway H91 TK33 Ireland
| | - Fawaz Aldabbagh
- School of Chemistry National University of Ireland Galway University Road Galway H91 TK33 Ireland
- Department of Pharmacy School of Life Sciences Pharmacy and Chemistry Kingston University Kingston upon Thames KT1 2EE UK
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2
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Houston SD, Fahrenhorst-Jones T, Xing H, Chalmers BA, Sykes ML, Stok JE, Farfan Soto C, Burns JM, Bernhardt PV, De Voss JJ, Boyle GM, Smith MT, Tsanaktsidis J, Savage GP, Avery VM, Williams CM. The cubane paradigm in bioactive molecule discovery: further scope, limitations and the cyclooctatetraene complement. Org Biomol Chem 2020; 17:6790-6798. [PMID: 31241113 DOI: 10.1039/c9ob01238a] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The cubane phenyl ring bioisostere paradigm was further explored in an extensive study covering a wide range of pharmaceutical and agrochemical templates, which included antibiotics (cefaclor, penicillin G) and antihistamine (diphenhydramine), a smooth muscle relaxant (alverine), an anaesthetic (ketamine), an agrochemical instecticide (triflumuron), an antiparasitic (benznidazole) and an anticancer agent (tamibarotene). This investigation highlights the scope and limitations of incorporating cubane into bioactive molecule discovery, both in terms of synthetic compatibility and physical property matching. Cubane maintained bioisosterism in the case of the Chagas disease antiparasitic benznidazole, although it was less active in the case of the anticancer agent (tamibarotenne). Application of the cyclooctatetraene (COT) (bio)motif complement was found to optimize benznidazole relative to the benzene parent, and augmented anticancer activity relative to the cubane analogue in the case of tamibarotene. Like all bioisosteres, scaffolds and biomotifs, however, there are limitations (e.g. synthetic implementation), and these have been specifically highlighted herein using failed examples. A summary of all templates prepared to date by our group that were biologically evaluated strongly supports the concept that cubane is a valuable tool in bioactive molecule discovery and COT is a viable complement.
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Affiliation(s)
- Sevan D Houston
- School of Chemistry and Molecular Biosciences, University of Queensland (UQ), Brisbane, 4072, Queensland (QLD), Australia.
| | - Tyler Fahrenhorst-Jones
- School of Chemistry and Molecular Biosciences, University of Queensland (UQ), Brisbane, 4072, Queensland (QLD), Australia.
| | - Hui Xing
- School of Chemistry and Molecular Biosciences, University of Queensland (UQ), Brisbane, 4072, Queensland (QLD), Australia.
| | - Benjamin A Chalmers
- School of Chemistry and Molecular Biosciences, University of Queensland (UQ), Brisbane, 4072, Queensland (QLD), Australia.
| | - Melissa L Sykes
- Discovery Biology, Griffith Institute for Drug Discovery, Griffith University, Brisbane, QLD 4111, Australia
| | - Jeanette E Stok
- School of Chemistry and Molecular Biosciences, University of Queensland (UQ), Brisbane, 4072, Queensland (QLD), Australia.
| | - Clementina Farfan Soto
- School of Chemistry and Molecular Biosciences, University of Queensland (UQ), Brisbane, 4072, Queensland (QLD), Australia.
| | - Jed M Burns
- School of Chemistry and Molecular Biosciences, University of Queensland (UQ), Brisbane, 4072, Queensland (QLD), Australia.
| | - Paul V Bernhardt
- School of Chemistry and Molecular Biosciences, University of Queensland (UQ), Brisbane, 4072, Queensland (QLD), Australia.
| | - James J De Voss
- School of Chemistry and Molecular Biosciences, University of Queensland (UQ), Brisbane, 4072, Queensland (QLD), Australia.
| | - Glen M Boyle
- QIMR Berghofer Medical Research Institute, PO Royal Brisbane Hospital, Brisbane, 4029, QLD, Australia
| | - Maree T Smith
- School of Biomedical Sciences, Faculty of Medicine, UQ, Brisbane, Australia
| | - John Tsanaktsidis
- CSIRO Manufacturing, Ian Wark Laboratory, Melbourne, 3168, Victoria (VIC), Australia
| | - G Paul Savage
- CSIRO Manufacturing, Ian Wark Laboratory, Melbourne, 3168, Victoria (VIC), Australia
| | - Vicky M Avery
- Discovery Biology, Griffith Institute for Drug Discovery, Griffith University, Brisbane, QLD 4111, Australia
| | - Craig M Williams
- School of Chemistry and Molecular Biosciences, University of Queensland (UQ), Brisbane, 4072, Queensland (QLD), Australia.
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3
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Houston SD, Chalmers BA, Savage GP, Williams CM. Enantioselective synthesis of (R)-2-cubylglycine including unprecedented rhodium mediated C–H insertion of cubane. Org Biomol Chem 2019; 17:1067-1070. [DOI: 10.1039/c8ob02959h] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
An enantioselective synthesis of the non-proteinogenic amino acid (R)-2-cubylglycine and the first examples of cubane C–H insertion are reported.
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Affiliation(s)
- Sevan D. Houston
- School of Chemistry and Molecular Biosciences
- University of Queensland
- Brisbane
- Australia
| | - Benjamin A. Chalmers
- School of Chemistry and Molecular Biosciences
- University of Queensland
- Brisbane
- Australia
| | - G. Paul Savage
- CSIRO Manufacturing
- Ian Wark Laboratory
- Melbourne
- Australia
| | - Craig M. Williams
- School of Chemistry and Molecular Biosciences
- University of Queensland
- Brisbane
- Australia
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4
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Chong KL, Chalmers BA, Cullen JK, Kaur A, Kolanowski JL, Morrow BJ, Fairfull-Smith KE, Lavin MJ, Barnett NL, New EJ, Murphy MP, Bottle SE. Pro-fluorescent mitochondria-targeted real-time responsive redox probes synthesised from carboxy isoindoline nitroxides: Sensitive probes of mitochondrial redox status in cells. Free Radic Biol Med 2018; 128:97-110. [PMID: 29567391 DOI: 10.1016/j.freeradbiomed.2018.03.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 02/12/2018] [Accepted: 03/06/2018] [Indexed: 11/28/2022]
Abstract
Here we describe new fluorescent probes based on fluorescein and rhodamine that provide reversible, real-time insight into cellular redox status. The new probes incorporate bio-imaging relevant fluorophores derived from fluorescein and rhodamine linked with stable nitroxide radicals such that they cannot be cleaved, either spontaneously or enzymatically by cellular processes. Overall fluorescence emission is determined by reversible reduction and oxidation, hence the steady state emission intensity reflects the balance between redox potentials of critical redox couples within the cell. The permanent positive charge on the rhodamine-based probes leads to their rapid localisation within mitochondria in cells. Reduction and oxidation also leads to marked changes in the fluorophore lifetime, enabling monitoring by fluorescence lifetime imaging microscopy. Finally, we demonstrate that administration of a methyl ester version of the rhodamine-based probe can be used at concentrations as low as 5 nM to generate a readily detected response to redox stress within cells as analysed by flow cytometry.
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Affiliation(s)
- Kok Leong Chong
- ARC Centre of Excellence for Free Radical Chemistry, Faculty of Science and Engineering, Queensland University of Technology (QUT), Brisbane, Queensland, Australia
| | - Benjamin A Chalmers
- ARC Centre of Excellence for Free Radical Chemistry, Faculty of Science and Engineering, Queensland University of Technology (QUT), Brisbane, Queensland, Australia
| | - Jason K Cullen
- Cell and Molecular Biology, Queensland Institute of Medical Research, Brisbane, Australia
| | - Amandeep Kaur
- School of Chemistry, University of Sydney, Australia
| | | | - Benjamin J Morrow
- ARC Centre of Excellence for Free Radical Chemistry, Faculty of Science and Engineering, Queensland University of Technology (QUT), Brisbane, Queensland, Australia
| | - Kathryn E Fairfull-Smith
- ARC Centre of Excellence for Free Radical Chemistry, Faculty of Science and Engineering, Queensland University of Technology (QUT), Brisbane, Queensland, Australia
| | - Martin J Lavin
- Cell and Molecular Biology, Queensland Institute of Medical Research, Brisbane, Australia; University of Queensland, Centre for Clinical Research, Brisbane, Australia
| | | | | | - Michael P Murphy
- MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge CB2 0XY, UK
| | - Steven E Bottle
- ARC Centre of Excellence for Free Radical Chemistry, Faculty of Science and Engineering, Queensland University of Technology (QUT), Brisbane, Queensland, Australia.
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5
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Chalmers BA, Xing H, Houston S, Clark C, Ghassabian S, Kuo A, Cao B, Reitsma A, Murray CP, Stok JE, Boyle GM, Pierce CJ, Littler SW, Winkler DA, Bernhardt PV, Pasay C, De Voss JJ, McCarthy J, Parsons PG, Walter GH, Smith MT, Cooper HM, Nilsson SK, Tsanaktsidis J, Savage GP, Williams CM. Corrigendum: Validating Eaton's Hypothesis: Cubane as a Benzene Bioisostere. Angew Chem Int Ed Engl 2018; 57:8359. [DOI: 10.1002/anie.201711161] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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6
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Chalmers BA, Xing H, Houston S, Clark C, Ghassabian S, Kuo A, Cao B, Reitsma A, Murray CP, Stok JE, Boyle GM, Pierce CJ, Littler SW, Winkler DA, Bernhardt PV, Pasay C, De Voss JJ, McCarthy J, Parsons PG, Walter GH, Smith MT, Cooper HM, Nilsson SK, Tsanaktsidis J, Savage GP, Williams CM. Berichtigung: Validating Eaton's Hypothesis: Cubane as a Benzene Bioisostere. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201711161] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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7
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Alzahrani A, Mirallai SI, Chalmers BA, McArdle P, Aldabbagh F. Synthesis of N-[(dialkylamino)methyl]acrylamides and N-[(dialkylamino)methyl]methacrylamides from Schiff base salts: useful building blocks for smart polymers. Org Biomol Chem 2018; 16:4108-4116. [DOI: 10.1039/c8ob00811f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Schiff base salts are characterized and form N-amino methylated acrylamides and methacrylamides.
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Affiliation(s)
- Abdullah Alzahrani
- School of Chemistry
- National University of Ireland Galway
- University Road
- Galway
- Ireland
| | - Styliana I. Mirallai
- School of Chemistry
- National University of Ireland Galway
- University Road
- Galway
- Ireland
| | - Benjamin A. Chalmers
- School of Chemistry
- National University of Ireland Galway
- University Road
- Galway
- Ireland
| | - Patrick McArdle
- School of Chemistry
- National University of Ireland Galway
- University Road
- Galway
- Ireland
| | - Fawaz Aldabbagh
- School of Chemistry
- National University of Ireland Galway
- University Road
- Galway
- Ireland
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8
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Chalmers BA, Xing H, Houston S, Clark C, Ghassabian S, Kuo A, Cao B, Reitsma A, Murray CEP, Stok JE, Boyle GM, Pierce CJ, Littler SW, Winkler DA, Bernhardt PV, Pasay C, De Voss JJ, McCarthy J, Parsons PG, Walter GH, Smith MT, Cooper HM, Nilsson SK, Tsanaktsidis J, Savage GP, Williams CM. Frontispiece: Validating Eaton's Hypothesis: Cubane as a Benzene Bioisostere. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/anie.201681161] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Benjamin A. Chalmers
- School of Chemistry and Molecular Biosciences; University of Queensland (UQ); Brisbane 4072 Queensland (QLD Australia
| | - Hui Xing
- School of Chemistry and Molecular Biosciences; University of Queensland (UQ); Brisbane 4072 Queensland (QLD Australia
| | - Sevan Houston
- School of Chemistry and Molecular Biosciences; University of Queensland (UQ); Brisbane 4072 Queensland (QLD Australia
| | | | | | - Andy Kuo
- Centre for Integrated Preclinical Drug Development, UQ; Australia
| | - Benjamin Cao
- CISRO Manufacturing; Ian Wark Laboratory; Melbourne 3168 Victoria (VIC Australia
- Australian Regenerative Medicine Institute; Monash University (MU); Melbourne 3168 VIC Australia
| | - Andrea Reitsma
- CISRO Manufacturing; Ian Wark Laboratory; Melbourne 3168 Victoria (VIC Australia
- Australian Regenerative Medicine Institute; Monash University (MU); Melbourne 3168 VIC Australia
| | | | - Jeanette E. Stok
- School of Chemistry and Molecular Biosciences; University of Queensland (UQ); Brisbane 4072 Queensland (QLD Australia
| | - Glen M. Boyle
- QIMR Berghofer Medical Research Institute; PO Royal Brisbane Hospital Brisbane 4029 QLD Australia
| | - Carly J. Pierce
- QIMR Berghofer Medical Research Institute; PO Royal Brisbane Hospital Brisbane 4029 QLD Australia
| | - Stuart W. Littler
- CISRO Manufacturing; Ian Wark Laboratory; Melbourne 3168 Victoria (VIC Australia
| | - David A. Winkler
- CISRO Manufacturing; Ian Wark Laboratory; Melbourne 3168 Victoria (VIC Australia
- Monash Institute of Pharmaceutical Sciences; Parkville 3052 MU Australia
| | - Paul V. Bernhardt
- School of Chemistry and Molecular Biosciences; University of Queensland (UQ); Brisbane 4072 Queensland (QLD Australia
| | - Cielo Pasay
- QIMR Berghofer Medical Research Institute; PO Royal Brisbane Hospital Brisbane 4029 QLD Australia
| | - James J. De Voss
- School of Chemistry and Molecular Biosciences; University of Queensland (UQ); Brisbane 4072 Queensland (QLD Australia
| | - James McCarthy
- QIMR Berghofer Medical Research Institute; PO Royal Brisbane Hospital Brisbane 4029 QLD Australia
- Australian Centre for International and Tropical Health, UQ; Australia
| | - Peter G. Parsons
- QIMR Berghofer Medical Research Institute; PO Royal Brisbane Hospital Brisbane 4029 QLD Australia
| | | | - Maree T. Smith
- Centre for Integrated Preclinical Drug Development, UQ; Australia
| | | | - Susan K. Nilsson
- CISRO Manufacturing; Ian Wark Laboratory; Melbourne 3168 Victoria (VIC Australia
- Australian Regenerative Medicine Institute; Monash University (MU); Melbourne 3168 VIC Australia
| | - John Tsanaktsidis
- CISRO Manufacturing; Ian Wark Laboratory; Melbourne 3168 Victoria (VIC Australia
| | - G. Paul Savage
- CISRO Manufacturing; Ian Wark Laboratory; Melbourne 3168 Victoria (VIC Australia
| | - Craig M. Williams
- School of Chemistry and Molecular Biosciences; University of Queensland (UQ); Brisbane 4072 Queensland (QLD Australia
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9
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Chalmers BA, Xing H, Houston S, Clark C, Ghassabian S, Kuo A, Cao B, Reitsma A, Murray CEP, Stok JE, Boyle GM, Pierce CJ, Littler SW, Winkler DA, Bernhardt PV, Pasay C, De Voss JJ, McCarthy J, Parsons PG, Walter GH, Smith MT, Cooper HM, Nilsson SK, Tsanaktsidis J, Savage GP, Williams CM. Frontispiz: Validating Eaton's Hypothesis: Cubane as a Benzene Bioisostere. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201681161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Benjamin A. Chalmers
- School of Chemistry and Molecular Biosciences; University of Queensland (UQ); Brisbane 4072 Queensland (QLD Australia
| | - Hui Xing
- School of Chemistry and Molecular Biosciences; University of Queensland (UQ); Brisbane 4072 Queensland (QLD Australia
| | - Sevan Houston
- School of Chemistry and Molecular Biosciences; University of Queensland (UQ); Brisbane 4072 Queensland (QLD Australia
| | | | | | - Andy Kuo
- Centre for Integrated Preclinical Drug Development, UQ; Australia
| | - Benjamin Cao
- CISRO Manufacturing; Ian Wark Laboratory; Melbourne 3168 Victoria (VIC Australia
- Australian Regenerative Medicine Institute; Monash University (MU); Melbourne 3168 VIC Australia
| | - Andrea Reitsma
- CISRO Manufacturing; Ian Wark Laboratory; Melbourne 3168 Victoria (VIC Australia
- Australian Regenerative Medicine Institute; Monash University (MU); Melbourne 3168 VIC Australia
| | | | - Jeanette E. Stok
- School of Chemistry and Molecular Biosciences; University of Queensland (UQ); Brisbane 4072 Queensland (QLD Australia
| | - Glen M. Boyle
- QIMR Berghofer Medical Research Institute; PO Royal Brisbane Hospital Brisbane 4029 QLD Australia
| | - Carly J. Pierce
- QIMR Berghofer Medical Research Institute; PO Royal Brisbane Hospital Brisbane 4029 QLD Australia
| | - Stuart W. Littler
- CISRO Manufacturing; Ian Wark Laboratory; Melbourne 3168 Victoria (VIC Australia
| | - David A. Winkler
- CISRO Manufacturing; Ian Wark Laboratory; Melbourne 3168 Victoria (VIC Australia
- Monash Institute of Pharmaceutical Sciences; Parkville 3052 MU Australia
| | - Paul V. Bernhardt
- School of Chemistry and Molecular Biosciences; University of Queensland (UQ); Brisbane 4072 Queensland (QLD Australia
| | - Cielo Pasay
- QIMR Berghofer Medical Research Institute; PO Royal Brisbane Hospital Brisbane 4029 QLD Australia
| | - James J. De Voss
- School of Chemistry and Molecular Biosciences; University of Queensland (UQ); Brisbane 4072 Queensland (QLD Australia
| | - James McCarthy
- QIMR Berghofer Medical Research Institute; PO Royal Brisbane Hospital Brisbane 4029 QLD Australia
- Australian Centre for International and Tropical Health, UQ; Australia
| | - Peter G. Parsons
- QIMR Berghofer Medical Research Institute; PO Royal Brisbane Hospital Brisbane 4029 QLD Australia
| | | | - Maree T. Smith
- Centre for Integrated Preclinical Drug Development, UQ; Australia
| | | | - Susan K. Nilsson
- CISRO Manufacturing; Ian Wark Laboratory; Melbourne 3168 Victoria (VIC Australia
- Australian Regenerative Medicine Institute; Monash University (MU); Melbourne 3168 VIC Australia
| | - John Tsanaktsidis
- CISRO Manufacturing; Ian Wark Laboratory; Melbourne 3168 Victoria (VIC Australia
| | - G. Paul Savage
- CISRO Manufacturing; Ian Wark Laboratory; Melbourne 3168 Victoria (VIC Australia
| | - Craig M. Williams
- School of Chemistry and Molecular Biosciences; University of Queensland (UQ); Brisbane 4072 Queensland (QLD Australia
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10
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Chalmers BA, Xing H, Houston S, Clark C, Ghassabian S, Kuo A, Cao B, Reitsma A, Murray CEP, Stok JE, Boyle GM, Pierce CJ, Littler SW, Winkler DA, Bernhardt PV, Pasay C, De Voss JJ, McCarthy J, Parsons PG, Walter GH, Smith MT, Cooper HM, Nilsson SK, Tsanaktsidis J, Savage GP, Williams CM. Validating Eaton's Hypothesis: Cubane as a Benzene Bioisostere. Angew Chem Int Ed Engl 2016; 55:3580-5. [PMID: 26846616 DOI: 10.1002/anie.201510675] [Citation(s) in RCA: 109] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Revised: 01/03/2016] [Indexed: 01/25/2023]
Abstract
Pharmaceutical and agrochemical discovery programs are under considerable pressure to meet increasing global demand and thus require constant innovation. Classical hydrocarbon scaffolds have long assisted in bringing new molecules to the market place, but an obvious omission is that of the Platonic solid cubane. Eaton, however, suggested that this molecule has the potential to act as a benzene bioisostere. Herein, we report the validation of Eaton's hypothesis with cubane derivatives of five molecules that are used clinically or as agrochemicals. Two cubane analogues showed increased bioactivity compared to their benzene counterparts whereas two further analogues displayed equal bioactivity, and the fifth one demonstrated only partial efficacy. Ramifications from this study are best realized by reflecting on the number of bioactive molecules that contain a benzene ring. Substitution with the cubane scaffold where possible could revitalize these systems, and thus expedite much needed lead candidate identification.
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Affiliation(s)
- Benjamin A Chalmers
- School of Chemistry and Molecular Biosciences, University of Queensland (UQ), Brisbane, 4072, Queensland (QLD, Australia
| | - Hui Xing
- School of Chemistry and Molecular Biosciences, University of Queensland (UQ), Brisbane, 4072, Queensland (QLD, Australia
| | - Sevan Houston
- School of Chemistry and Molecular Biosciences, University of Queensland (UQ), Brisbane, 4072, Queensland (QLD, Australia
| | | | | | - Andy Kuo
- Centre for Integrated Preclinical Drug Development, UQ, Australia
| | - Benjamin Cao
- CISRO Manufacturing, Ian Wark Laboratory, Melbourne, 3168, Victoria (VIC, Australia.,Australian Regenerative Medicine Institute, Monash University (MU), Melbourne, 3168, VIC, Australia
| | - Andrea Reitsma
- CISRO Manufacturing, Ian Wark Laboratory, Melbourne, 3168, Victoria (VIC, Australia.,Australian Regenerative Medicine Institute, Monash University (MU), Melbourne, 3168, VIC, Australia
| | | | - Jeanette E Stok
- School of Chemistry and Molecular Biosciences, University of Queensland (UQ), Brisbane, 4072, Queensland (QLD, Australia
| | - Glen M Boyle
- QIMR Berghofer Medical Research Institute, PO Royal Brisbane Hospital, Brisbane, 4029, QLD, Australia
| | - Carly J Pierce
- QIMR Berghofer Medical Research Institute, PO Royal Brisbane Hospital, Brisbane, 4029, QLD, Australia
| | - Stuart W Littler
- CISRO Manufacturing, Ian Wark Laboratory, Melbourne, 3168, Victoria (VIC, Australia
| | - David A Winkler
- CISRO Manufacturing, Ian Wark Laboratory, Melbourne, 3168, Victoria (VIC, Australia.,Monash Institute of Pharmaceutical Sciences, Parkville, 3052, MU, Australia
| | - Paul V Bernhardt
- School of Chemistry and Molecular Biosciences, University of Queensland (UQ), Brisbane, 4072, Queensland (QLD, Australia
| | - Cielo Pasay
- QIMR Berghofer Medical Research Institute, PO Royal Brisbane Hospital, Brisbane, 4029, QLD, Australia
| | - James J De Voss
- School of Chemistry and Molecular Biosciences, University of Queensland (UQ), Brisbane, 4072, Queensland (QLD, Australia
| | - James McCarthy
- QIMR Berghofer Medical Research Institute, PO Royal Brisbane Hospital, Brisbane, 4029, QLD, Australia.,Australian Centre for International and Tropical Health, UQ, Australia
| | - Peter G Parsons
- QIMR Berghofer Medical Research Institute, PO Royal Brisbane Hospital, Brisbane, 4029, QLD, Australia
| | | | - Maree T Smith
- Centre for Integrated Preclinical Drug Development, UQ, Australia
| | | | - Susan K Nilsson
- CISRO Manufacturing, Ian Wark Laboratory, Melbourne, 3168, Victoria (VIC, Australia.,Australian Regenerative Medicine Institute, Monash University (MU), Melbourne, 3168, VIC, Australia
| | - John Tsanaktsidis
- CISRO Manufacturing, Ian Wark Laboratory, Melbourne, 3168, Victoria (VIC, Australia.
| | - G Paul Savage
- CISRO Manufacturing, Ian Wark Laboratory, Melbourne, 3168, Victoria (VIC, Australia.
| | - Craig M Williams
- School of Chemistry and Molecular Biosciences, University of Queensland (UQ), Brisbane, 4072, Queensland (QLD, Australia.
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11
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Chalmers BA, Xing H, Houston S, Clark C, Ghassabian S, Kuo A, Cao B, Reitsma A, Murray CP, Stok JE, Boyle GM, Pierce CJ, Littler SW, Winkler DA, Bernhardt PV, Pasay C, De Voss JJ, McCarthy J, Parsons PG, Walter GH, Smith MT, Cooper HM, Nilsson SK, Tsanaktsidis J, Savage GP, Williams CM. Validating Eaton's Hypothesis: Cubane as a Benzene Bioisostere. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201510675] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Benjamin A. Chalmers
- School of Chemistry and Molecular Biosciences University of Queensland (UQ) Brisbane 4072 Queensland (QLD Australia
| | - Hui Xing
- School of Chemistry and Molecular Biosciences University of Queensland (UQ) Brisbane 4072 Queensland (QLD Australia
| | - Sevan Houston
- School of Chemistry and Molecular Biosciences University of Queensland (UQ) Brisbane 4072 Queensland (QLD Australia
| | | | | | - Andy Kuo
- Centre for Integrated Preclinical Drug Development, UQ Australia
| | - Benjamin Cao
- CISRO Manufacturing Ian Wark Laboratory Melbourne 3168 Victoria (VIC Australia
- Australian Regenerative Medicine Institute Monash University (MU) Melbourne 3168 VIC Australia
| | - Andrea Reitsma
- CISRO Manufacturing Ian Wark Laboratory Melbourne 3168 Victoria (VIC Australia
- Australian Regenerative Medicine Institute Monash University (MU) Melbourne 3168 VIC Australia
| | | | - Jeanette E. Stok
- School of Chemistry and Molecular Biosciences University of Queensland (UQ) Brisbane 4072 Queensland (QLD Australia
| | - Glen M. Boyle
- QIMR Berghofer Medical Research Institute PO Royal Brisbane Hospital Brisbane 4029 QLD Australia
| | - Carly J. Pierce
- QIMR Berghofer Medical Research Institute PO Royal Brisbane Hospital Brisbane 4029 QLD Australia
| | - Stuart W. Littler
- CISRO Manufacturing Ian Wark Laboratory Melbourne 3168 Victoria (VIC Australia
| | - David A. Winkler
- CISRO Manufacturing Ian Wark Laboratory Melbourne 3168 Victoria (VIC Australia
- Monash Institute of Pharmaceutical Sciences Parkville 3052 MU Australia
| | - Paul V. Bernhardt
- School of Chemistry and Molecular Biosciences University of Queensland (UQ) Brisbane 4072 Queensland (QLD Australia
| | - Cielo Pasay
- QIMR Berghofer Medical Research Institute PO Royal Brisbane Hospital Brisbane 4029 QLD Australia
| | - James J. De Voss
- School of Chemistry and Molecular Biosciences University of Queensland (UQ) Brisbane 4072 Queensland (QLD Australia
| | - James McCarthy
- QIMR Berghofer Medical Research Institute PO Royal Brisbane Hospital Brisbane 4029 QLD Australia
- Australian Centre for International and Tropical Health, UQ Australia
| | - Peter G. Parsons
- QIMR Berghofer Medical Research Institute PO Royal Brisbane Hospital Brisbane 4029 QLD Australia
| | | | - Maree T. Smith
- Centre for Integrated Preclinical Drug Development, UQ Australia
| | | | - Susan K. Nilsson
- CISRO Manufacturing Ian Wark Laboratory Melbourne 3168 Victoria (VIC Australia
- Australian Regenerative Medicine Institute Monash University (MU) Melbourne 3168 VIC Australia
| | - John Tsanaktsidis
- CISRO Manufacturing Ian Wark Laboratory Melbourne 3168 Victoria (VIC Australia
| | - G. Paul Savage
- CISRO Manufacturing Ian Wark Laboratory Melbourne 3168 Victoria (VIC Australia
| | - Craig M. Williams
- School of Chemistry and Molecular Biosciences University of Queensland (UQ) Brisbane 4072 Queensland (QLD Australia
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12
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Chalmers BA, Saha S, Nguyen T, McMurtrie J, Sigurdsson ST, Bottle SE, Masters KS. TMIO-PyrImid Hybrids are Profluorescent, Site-Directed Spin Labels for Nucleic Acids. Org Lett 2014; 16:5528-31. [DOI: 10.1021/ol502003a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Benjamin A. Chalmers
- Faculty
of Science and Engineering, Queensland University of Technology, P.O. Box 2434, 2 George Street, Brisbane, QLD 4001, Australia
| | - Subham Saha
- University of Iceland, Department of Chemistry, Science
Institute, Dunhaga 3, 107 Reykjavík, Iceland
| | | | | | - Snorri Th. Sigurdsson
- University of Iceland, Department of Chemistry, Science
Institute, Dunhaga 3, 107 Reykjavík, Iceland
| | - Steven E. Bottle
- Faculty
of Science and Engineering, Queensland University of Technology, P.O. Box 2434, 2 George Street, Brisbane, QLD 4001, Australia
| | - Kye-Simeon Masters
- Faculty
of Science and Engineering, Queensland University of Technology, P.O. Box 2434, 2 George Street, Brisbane, QLD 4001, Australia
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Chalmers BA, Morris JC, Fairfull-Smith KE, Grainger RS, Bottle SE. A novel protecting group methodology for syntheses using nitroxides. Chem Commun (Camb) 2014; 49:10382-4. [PMID: 24072180 DOI: 10.1039/c3cc46146g] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The methoxyamine group represents an ideal protecting group for the nitroxide moiety. It can be easily and selectively introduced in high yield (typically >90%) to a range of functionalised nitroxides using FeSO4·7H2O and H2O2 in DMSO. Its removal is readily achieved under mild conditions in high yield (70-90%) using mCPBA in a Cope-type elimination process.
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Affiliation(s)
- Benjamin A Chalmers
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology, Faculty of Science and Engineering, Queensland University of Technology, 2 George St, Brisbane, QLD 4001, Australia.
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Abstract
Cubane can be considered the ideal internal standard for reactions observed by NMR, due to an almost complete benign reactivity and uniquely reliable 1H and 13C NMR resonances, in wide variety of deuterated solvents.
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Lecoq D, Chalmers BA, Veedu RN, Kvaskoff D, Bernhardt PV, Wentrup C. Microwave-Induced Molecular Rearrangements. Flash Thermolysis in the Gas-Phase and in Solution: Synthesis of Quinolones and Naphthyridones. Aust J Chem 2009. [DOI: 10.1071/ch09447] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
3- and 4-Pyridyliminopropadienones were prepared by flash vacuum thermolysis of Meldrum’s acid derivatives and characterized by low temperature IR spectroscopy. They react with dimethylamine to afford 1,5-, 1,6-, and 1,7-naphthyridones. The same naphthyridones are also obtained by microwave irradiation of the Meldrum’s acid derivatives. Quinolones were obtained by microwave irradiation of phenylaminomethylene-Meldrum’s acids and 1-phenylpyrrole-2,3-diones.
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