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Maslovskaya LA, Savchenko AI, Krenske EH, Chow S, Holt T, Gordon VA, Reddell PW, Pierce CJ, Parsons PG, Boyle GM, Kutateladze AG, Williams CM. EBC-232 and 323: A Structural Conundrum Necessitating Unification of Five In Silico Prediction and Elucidation Methods. Chemistry 2020; 26:11862-11867. [PMID: 32864777 DOI: 10.1002/chem.202001884] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 06/08/2020] [Indexed: 12/12/2022]
Abstract
Structurally unique halimanes EBC-232 and EBC-323, isolated from the Australian rainforest plant Croton insularis, proved considerably difficult to elucidate. The two diastereomers, which consist an unusual oxo-6,7-spiro ring system fused to a dihydrofuran, were solved by unification and consultation of five in silico NMR elucidation and prediction methods [i.e., ACDLabs, olefin strain energy (OSE), DP4, DU8+ and TD DFT CD]. Structure elucidation challenges of this nature are prime test case examples for empowering future AI learning in structure elucidation.
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Affiliation(s)
- Lidia A Maslovskaya
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072, Australia.,QIMR Berghofer Medical Research Institute, PO Royal Brisbane Hospital, Brisbane, 4029, Australia
| | - Andrei I Savchenko
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072, Australia
| | - Elizabeth H Krenske
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072, Australia
| | - Sharon Chow
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072, Australia
| | - Tina Holt
- Department of Chemistry and Biochemistry, University of Denver, Denver, CO, 80208, USA
| | - Victoria A Gordon
- EcoBiotics Limited, PO Box 1, Yungaburra, 4884, Queensland, Australia
| | - Paul W Reddell
- EcoBiotics Limited, PO Box 1, Yungaburra, 4884, Queensland, Australia
| | - Carly J Pierce
- QIMR Berghofer Medical Research Institute, PO Royal Brisbane Hospital, Brisbane, 4029, Australia
| | - Peter G Parsons
- QIMR Berghofer Medical Research Institute, PO Royal Brisbane Hospital, Brisbane, 4029, Australia
| | - Glen M Boyle
- QIMR Berghofer Medical Research Institute, PO Royal Brisbane Hospital, Brisbane, 4029, Australia
| | - Andrei G Kutateladze
- Department of Chemistry and Biochemistry, University of Denver, Denver, CO, 80208, USA
| | - Craig M Williams
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072, Australia
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2
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Maslovskaya LA, Savchenko AI, Krenske EH, Chow S, Gordon VA, Reddell PW, Pierce CJ, Parsons PG, Boyle GM, Williams CM. EBC-342: A Novel Tetrahydrofuran Moiety Containing Casbane from the Australian Rainforest. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Lidia A. Maslovskaya
- School of Chemistry and Molecular Biosciences; University of Queensland; 4072 Brisbane Queensland Australia
- QIMR Berghofer Medical Research Institute; PO Royal Brisbane Hospital; 4029 Brisbane Queensland Australia
| | - Andrei I. Savchenko
- School of Chemistry and Molecular Biosciences; University of Queensland; 4072 Brisbane Queensland Australia
| | - Elizabeth H. Krenske
- School of Chemistry and Molecular Biosciences; University of Queensland; 4072 Brisbane Queensland Australia
| | - Sharon Chow
- School of Chemistry and Molecular Biosciences; University of Queensland; 4072 Brisbane Queensland Australia
| | | | - Paul W. Reddell
- EcoBiotics Limited; PO Box 1 4884 Yungaburra Queensland Australia
| | - Carly J. Pierce
- QIMR Berghofer Medical Research Institute; PO Royal Brisbane Hospital; 4029 Brisbane Queensland Australia
| | - Peter G. Parsons
- QIMR Berghofer Medical Research Institute; PO Royal Brisbane Hospital; 4029 Brisbane Queensland Australia
| | - Glen M. Boyle
- QIMR Berghofer Medical Research Institute; PO Royal Brisbane Hospital; 4029 Brisbane Queensland Australia
| | - Craig M. Williams
- School of Chemistry and Molecular Biosciences; University of Queensland; 4072 Brisbane Queensland Australia
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3
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Tan YP, Xue Y, Savchenko AI, Houston SD, Modhiran N, McMillan CLD, Boyle GM, Bernhardt PV, Young PR, Watterson D, Williams CM. Basimarols A, B, and C, Highly Oxygenated Pimarane Diterpenoids from Basilicum polystachyon. JOURNAL OF NATURAL PRODUCTS 2019; 82:2828-2834. [PMID: 31553187 DOI: 10.1021/acs.jnatprod.9b00522] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The highly oxygenated pimarane diterpenoids basimarols A, B, and C (3-5) were isolated from the plant species Basilicum polystachyon, which was collected within the Australian arid zone. Structure elucidation was performed using a suite of spectroscopic techniques, including X-ray crystallography. Anticancer and anti-DENV activity of 3-5 was explored, but only limited activity was observed. More extensive antiviral evaluation of stachyonic acid A (1), which was also isolated from B. polystachyon, revealed broad spectrum antiviral activity against West Nile virus (Kunjin strain, WNVKun) and human influenza viruses H1N1 and H3N2.
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Affiliation(s)
| | - Yongbo Xue
- School of Pharmaceutical Sciences (Shenzhen) , Sun Yat-Sen University , Guangzhou , 510275 , People's Republic of China
| | | | | | | | | | - Glen M Boyle
- QIMR Berghofer Medical Research Institute , PO Royal Brisbane Hospital, Brisbane , 4029 , Queensland , Australia
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Maslovskaya LA, Savchenko AI, Gordon VA, Reddell PW, Pierce CJ, Boyle GM, Parsons PG, Williams CM. New Halimanes from the Australian Rainforest Plant Croton Insularis. European J Org Chem 2019. [DOI: 10.1002/ejoc.201801548] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Lidia A. Maslovskaya
- School of Chemistry and Molecular Biosciences; University of; 4072 Brisbane Queensland Australia
- QIMR Berghofer Medical Research Institute; PO Royal Brisbane Hospital; 4029 Brisbane Queensland Australia
| | - Andrei I. Savchenko
- School of Chemistry and Molecular Biosciences; University of; 4072 Brisbane Queensland Australia
| | | | - Paul W. Reddell
- EcoBiotics Limited; PO Box 1 4884 Yungaburra Queensland Australia
| | - Carly J. Pierce
- QIMR Berghofer Medical Research Institute; PO Royal Brisbane Hospital; 4029 Brisbane Queensland Australia
| | - Glen M. Boyle
- QIMR Berghofer Medical Research Institute; PO Royal Brisbane Hospital; 4029 Brisbane Queensland Australia
| | - Peter G. Parsons
- QIMR Berghofer Medical Research Institute; PO Royal Brisbane Hospital; 4029 Brisbane Queensland Australia
| | - Craig M. Williams
- School of Chemistry and Molecular Biosciences; University of; 4072 Brisbane Queensland Australia
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5
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Maslovskaya LA, Savchenko AI, Pierce CJ, Boyle GM, Gordon VA, Reddell PW, Parsons PG, Williams CM. New Casbanes and the First trans
-Cyclopropane seco
-Casbane from the Australian Rainforest Plant Croton insularis. Chemistry 2019; 25:1525-1534. [DOI: 10.1002/chem.201804904] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 10/28/2018] [Indexed: 01/30/2023]
Affiliation(s)
- Lidiya A. Maslovskaya
- School of Chemistry and Molecular Biosciences; University of Queensland; Brisbane 4072 Queensland Australia
- QIMR Berghofer Medical Research Institute; PO Royal Brisbane Hospital; 4029 Queensland Australia
| | - Andrei I. Savchenko
- School of Chemistry and Molecular Biosciences; University of Queensland; Brisbane 4072 Queensland Australia
| | - Carly J. Pierce
- QIMR Berghofer Medical Research Institute; PO Royal Brisbane Hospital; 4029 Queensland Australia
| | - Glen M. Boyle
- QIMR Berghofer Medical Research Institute; PO Royal Brisbane Hospital; 4029 Queensland Australia
| | | | - Paul W. Reddell
- EcoBiotics Limited; P.O. Box 1 Yungaburra 4884 Queensland Australia
| | - Peter G. Parsons
- QIMR Berghofer Medical Research Institute; PO Royal Brisbane Hospital; 4029 Queensland Australia
| | - Craig M. Williams
- School of Chemistry and Molecular Biosciences; University of Queensland; Brisbane 4072 Queensland Australia
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Vanden Berg TJ, Pinkerton DM, Williams CM. 7-Step total synthesis of (+)-EBC-329: Photoisomerisation reveals new seco-casbane family member. Org Biomol Chem 2018; 15:7102-7105. [PMID: 28820535 DOI: 10.1039/c7ob01400g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first seco-casbane, EBC-329, isolated from the Australian rainforest, was synthesised from (+)-2-carene in seven steps. This endeavour not only established the absolute stereochemical assignment as (8R,9S)-EBC-329, but also identified, via photoisomerisation, a new seco-casbane family member.
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Affiliation(s)
- Timothy J Vanden Berg
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072, Australia.
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Campos RB, Tantillo DJ. Coupled Electrocyclization/Prototropic Shift in the Biosynthesis of Crotinsulidane Diterpenoids. J Org Chem 2018; 83:1073-1076. [DOI: 10.1021/acs.joc.7b02904] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Renan B. Campos
- Departamento
Acadêmico de Química e Biologia, Universidade Tecnológica Federal do Paraná, Rua Deputado Heitor de Alencar Furtado,
5000, 81280-340, Curitiba, Brazil
| | - Dean J. Tantillo
- Department
of Chemistry, University of California—Davis, 1 Shields Avenue, Davis, California 95616, United States
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Tan YP, Savchenko AI, Broit N, Boyle GM, Parsons PG, Williams CM. The First Plant 5,6-Secosteroid from the Australian Arid Zone SpeciesFrankenia foliosa. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700035] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yuen P. Tan
- School of Chemistry and Molecular Biosciences; University of Queensland; 4072 Brisbane Queensland Australia
| | - Andrei I. Savchenko
- School of Chemistry and Molecular Biosciences; University of Queensland; 4072 Brisbane Queensland Australia
| | - Natasa Broit
- PO Royal Brisbane Hospital; QIMR Berghofer Medical Research Institute; 4029 Brisbane Queensland Australia
| | - Glen M. Boyle
- PO Royal Brisbane Hospital; QIMR Berghofer Medical Research Institute; 4029 Brisbane Queensland Australia
| | - Peter G. Parsons
- PO Royal Brisbane Hospital; QIMR Berghofer Medical Research Institute; 4029 Brisbane Queensland Australia
| | - Craig M. Williams
- School of Chemistry and Molecular Biosciences; University of Queensland; 4072 Brisbane Queensland Australia
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Maslovskaya LA, Savchenko AI, Gordon VA, Reddell PW, Pierce CJ, Parsons PG, Williams CM. The First Casbane Hydroperoxides EBC-304 and EBC-320 from the Australian Rainforest. Chemistry 2016; 23:537-540. [DOI: 10.1002/chem.201604674] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Indexed: 01/30/2023]
Affiliation(s)
- Lidiya A. Maslovskaya
- School of Chemistry and Molecular Biosciences; University of Queensland; Brisbane 4072 Australia
- QIMR Berghofer Medical Research Institute; PO Royal Brisbane Hospital; Brisbane 4029, Queensland Australia
| | - Andrei I. Savchenko
- School of Chemistry and Molecular Biosciences; University of Queensland; Brisbane 4072 Australia
| | | | - Paul W. Reddell
- EcoBiotics Limited, PO Box 1; Yungaburra 4884, Queensland Australia
| | - Carly J. Pierce
- QIMR Berghofer Medical Research Institute; PO Royal Brisbane Hospital; Brisbane 4029, Queensland Australia
| | - Peter G. Parsons
- QIMR Berghofer Medical Research Institute; PO Royal Brisbane Hospital; Brisbane 4029, Queensland Australia
| | - Craig M. Williams
- School of Chemistry and Molecular Biosciences; University of Queensland; Brisbane 4072 Australia
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