1
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Herrera-Acevedo C, de Menezes RPB, de Sousa NF, Scotti L, Scotti MT, Coy-Barrera E. Kaurane-Type Diterpenoids as Potential Inhibitors of Dihydrofolate Reductase-Thymidylate Synthase in New World Leishmania Species. Antibiotics (Basel) 2023; 12:antibiotics12040663. [PMID: 37107025 PMCID: PMC10135059 DOI: 10.3390/antibiotics12040663] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 03/14/2023] [Accepted: 03/26/2023] [Indexed: 03/30/2023] Open
Abstract
The bifunctional enzyme Dihydrofolate reductase-thymidylate synthase (DHFR-TS) plays a crucial role in the survival of the Leishmania parasite, as folates are essential cofactors for purine and pyrimidine nucleotide biosynthesis. However, DHFR inhibitors are largely ineffective in controlling trypanosomatid infections, largely due to the presence of Pteridine reductase 1 (PTR1). Therefore, the search for structures with dual inhibitory activity against PTR1/DHFR-TS is crucial in the development of new anti-Leishmania chemotherapies. In this research, using the Leishmania major DHFR-TS recombinant protein, enzymatic inhibitory assays were performed on four kauranes and two derivatives that had been previously tested against LmPTR1. The structure 302 (6.3 µM) and its derivative 302a (4.5 µM) showed the lowest IC50 values among the evaluated molecules. To evaluate the mechanism of action of these structures, molecular docking calculations and molecular dynamics simulations were performed using a DHFR-TS hybrid model. Results showed that hydrogen bond interactions are critical for the inhibitory activity against LmDHFR-TS, as well as the presence of the p-hydroxyl group of the phenylpropanoid moiety of 302a. Finally, additional computational studies were performed on DHFR-TS structures from Leishmania species that cause cutaneous and mucocutaneous leishmaniasis in the New World (L. braziliensis, L. panamensis, and L. amazonensis) to explore the targeting potential of these kauranes in these species. It was demonstrated that structures 302 and 302a are multi-Leishmania species compounds with dual DHFR-TS/PTR1 inhibitory activity.
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Affiliation(s)
- Chonny Herrera-Acevedo
- Post-Graduate Program in Natural and Synthetic Bioactive Products, Federal University of Paraíba, João Pessoa 58051-900, PB, Brazil (M.T.S.)
- Department of Chemical Engineering, Universidad ECCI, Bogotá, Distrito Capital 111311, Colombia
| | - Renata Priscila Barros de Menezes
- Post-Graduate Program in Natural and Synthetic Bioactive Products, Federal University of Paraíba, João Pessoa 58051-900, PB, Brazil (M.T.S.)
| | - Natália Ferreira de Sousa
- Post-Graduate Program in Natural and Synthetic Bioactive Products, Federal University of Paraíba, João Pessoa 58051-900, PB, Brazil (M.T.S.)
| | - Luciana Scotti
- Post-Graduate Program in Natural and Synthetic Bioactive Products, Federal University of Paraíba, João Pessoa 58051-900, PB, Brazil (M.T.S.)
| | - Marcus Tullius Scotti
- Post-Graduate Program in Natural and Synthetic Bioactive Products, Federal University of Paraíba, João Pessoa 58051-900, PB, Brazil (M.T.S.)
| | - Ericsson Coy-Barrera
- Bioorganic Chemistry Laboratory, Facultad de Ciencias Básicas y Aplicadas, Universidad Militar Nueva Granada, Cajicá 250247, Colombia
- Correspondence:
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2
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Jodra A, García-Iriepa C, Frutos LM. Mechanical Activation of Forbidden Photoreactivity in Oxa-di-π-methane Rearrangement. J Org Chem 2022; 87:12586-12595. [PMID: 36166757 PMCID: PMC9552220 DOI: 10.1021/acs.joc.2c00720] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Indexed: 11/30/2022]
Abstract
In this work, we demonstrate that the forbidden oxirane-type photoproduct (the cyclopropyl ketone photoproduct is the allowed one) of the oxa-di-π-methane photorearrangement can be obtained by mechanochemical control of the photoreactions. This control is achieved by the application of simple force pairs rationally chosen. By analyzing in detail the effect of the applied forces on this photoreaction, it comes to light that the mechanical action affects the diverse properties of the oxa-di-π-methane rearrangement, modifying all the steps of the reaction: (i) the initial ground-state conformers' distribution becomes affected; (ii) the new conformational population makes the triplet excitation process to be changed, responding to the magnitude of the applied force; (iii) the stability of the different intermediates along the triplet pathway also becomes affected, changing the dynamical behavior of the system and the reaction kinetics; and (iv) the intersystem crossing also becomes strongly affected, making the forbidden oxirane-type photoproduct to decay more efficiently to the ground state. All these changes provide a complex scenario where a detailed study of the effect of applied forces is necessary in order to predict its overall effect on the photoreactivity.
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Affiliation(s)
- Alejandro Jodra
- Universidad de Alcalá, Departamento de Química Analítica, Química Física e Ingeniería Química, Grupo de Reactividad y Estructura Molecular (RESMOL), Alcalá de Henares 28806, Madrid, Spain
| | - Cristina García-Iriepa
- Universidad de Alcalá, Departamento de Química Analítica, Química Física e Ingeniería Química, Grupo de Reactividad y Estructura Molecular (RESMOL), Alcalá de Henares 28806, Madrid, Spain
- Instituto de Investigación Química ''Andrés M. del Río'' (IQAR), Universidad de Alcalá, Alcalá de Henares 28806, Madrid, Spain
| | - Luis Manuel Frutos
- Universidad de Alcalá, Departamento de Química Analítica, Química Física e Ingeniería Química, Grupo de Reactividad y Estructura Molecular (RESMOL), Alcalá de Henares 28806, Madrid, Spain
- Instituto de Investigación Química ''Andrés M. del Río'' (IQAR), Universidad de Alcalá, Alcalá de Henares 28806, Madrid, Spain
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3
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Stewart SG, Harfoot GJ, McRae KJ, Teng Y, Yu LJ, Chen B, Cammi R, Coote ML, Banwell MG, Willis AC. High-Pressure-Promoted and Facially Selective Diels–Alder Reactions of Enzymatically Derived cis-1,2-Dihydrocatechols and Their Acetonide Derivatives: Enantiodivergent Routes to Homochiral and Polyfunctionalized Bicyclo[2.2.2]octenes. J Org Chem 2020; 85:13080-13095. [DOI: 10.1021/acs.joc.0c01767] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Scott G. Stewart
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601 Australia
| | - Gwion J. Harfoot
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601 Australia
| | - Kenneth J. McRae
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601 Australia
| | - Yinglai Teng
- Institute for Advanced and Applied Chemical Synthesis, Jinan University, Guangzhou 510632, China
| | - Li-Juan Yu
- Research School of Chemistry, Institute of Advanced Studies and ARC Centre of Excellence for Electromaterials Science, Research School of Chemistry, The Australian National University, Canberra, ACT 2601 Australia
| | - Bo Chen
- Donostia International Physics Center, Paseo Manuel de Lardizabal, 4, 20018 Donostia-San Sebastian, Spain
- IKERBASQUE, Basque Foundation for Science, Maria Diaz de Haro 3, 48013 Bilbao, Spain
| | - Roberto Cammi
- Department of Chemical Science, Life Science and Environmental Sustainability, University of Parma, I-43100 Parma, Italy
| | - Michelle L. Coote
- Research School of Chemistry, Institute of Advanced Studies and ARC Centre of Excellence for Electromaterials Science, Research School of Chemistry, The Australian National University, Canberra, ACT 2601 Australia
| | - Martin G. Banwell
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601 Australia
- Institute for Advanced and Applied Chemical Synthesis, Jinan University, Guangzhou 510632, China
| | - Anthony C. Willis
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601 Australia
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4
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Lan P, Ye S, Banwell MG. The Application of Dioxygenase-Based Chemoenzymatic Processes to the Total Synthesis of Natural Products. Chem Asian J 2020; 14:4001-4012. [PMID: 31609526 DOI: 10.1002/asia.201900988] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Revised: 09/18/2019] [Indexed: 12/14/2022]
Abstract
This Minireview describes the exploitation of certain enzymatically derived, readily accessible, and enantiomerically pure cis-1,2-dihydrocatechols as starting materials in the chemical synthesis of a range of biologically active natural products, most notably sesquiterpenoids and alkaloids.
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Affiliation(s)
- Ping Lan
- Institute for Advanced and Applied Chemical Synthesis, Jinan University, Guangzhou, 510632, China
| | - Sebastian Ye
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT, 2601, Australia
| | - Martin G Banwell
- Institute for Advanced and Applied Chemical Synthesis, Jinan University, Guangzhou, 510632, China.,Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT, 2601, Australia
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5
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Kotha S, Cheekatla SR, Meshram M, Bandi V, Seema V. Realization of Photo‐Thermal Metathesis Under Microwave Irradiation Conditions: An Entry to Triquinane Frameworks. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900432] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sambasivarao Kotha
- Department of ChemistryIndian Institute of Technology Bombay Mumbai Powai India-400076 India
| | - Subba Rao Cheekatla
- Department of ChemistryIndian Institute of Technology Bombay Mumbai Powai India-400076 India
| | - Milind Meshram
- Department of ChemistryIndian Institute of Technology Bombay Mumbai Powai India-400076 India
| | - Vijayalakshmi Bandi
- Department of ChemistryIndian Institute of Technology Bombay Mumbai Powai India-400076 India
| | - Vittal Seema
- Department of ChemistryIndian Institute of Technology Bombay Mumbai Powai India-400076 India
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6
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Hudlicky T. Benefits of Unconventional Methods in the Total Synthesis of Natural Products. ACS OMEGA 2018; 3:17326-17340. [PMID: 30613812 PMCID: PMC6312638 DOI: 10.1021/acsomega.8b02994] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Accepted: 11/27/2018] [Indexed: 06/09/2023]
Abstract
This article provides a survey of four "unconventional" methods employed in the synthesis of natural products in the Hudlicky group. The utility of flash vacuum pyrolysis is highlighted by examples of many natural products attained via vinylcyclopropane-cyclopentene rearrangement and its heterocyclic variants. Preparative organic electrochemistry was used in oxidations and reductions with levels of selectivity unattainable by conventional methods. Yeast reduction of ketoesters was featured in the total synthesis of pyrrolizidine alkaloids. Finally, the use of toluene dioxygenase-mediated dihydroxylations in enantioselective synthesis of natural products concludes this presentation. Recently, synthesized targets in the period 2010-2019 are listed in the accompanying table. The results of research from the Hudlicky group are placed in appropriate context with the work of others, and a detailed guide to the current literature is provided.
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7
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Linear Triquinane Sesquiterpenoids: Their Isolation, Structures, Biological Activities, and Chemical Synthesis. Molecules 2018; 23:molecules23092095. [PMID: 30134555 PMCID: PMC6225328 DOI: 10.3390/molecules23092095] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Revised: 08/17/2018] [Accepted: 08/19/2018] [Indexed: 11/23/2022] Open
Abstract
Linear triquinane sesquiterpenoids represent an important class of natural products. Most of these compounds were isolated from fungi, sponges, and soft corals, and many of them displayed a wide range of biological activities. On account of their structural diversity and complexity, linear triquinane sesquiterpenoids present new challenges for chemical structure identification and total synthesis. 118 linear triquinane sesquiterpenoids were classified into 8 types, named types I–VIII, based on the carbon skeleton and the position of carbon substituents. Their isolation, structure elucidations, biological activities, and chemical synthesis were reviewed. This paper cited 102 articles from 1947 to 2018.
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8
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Taher ES, Banwell MG, Buckler JN, Yan Q, Lan P. The Exploitation of Enzymatically-Derivedcis-1,2-Dihydrocatechols and Related Compounds in the Synthesis of Biologically Active Natural Products. CHEM REC 2017; 18:239-264. [DOI: 10.1002/tcr.201700064] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Indexed: 12/15/2022]
Affiliation(s)
- Ehab S. Taher
- Research School of Chemistry; Institute of Advanced Studies; The Australian National University; Canberra ACT 2601 Australia
| | - Martin G. Banwell
- Research School of Chemistry; Institute of Advanced Studies; The Australian National University; Canberra ACT 2601 Australia
| | - Joshua N. Buckler
- Research School of Chemistry; Institute of Advanced Studies; The Australian National University; Canberra ACT 2601 Australia
| | - Qiao Yan
- Research School of Chemistry; Institute of Advanced Studies; The Australian National University; Canberra ACT 2601 Australia
| | - Ping Lan
- Department of Food Science and Engineering; College of Science and Engineering; Jinan University; Guangzhou 510632 People's Republic of China
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9
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Huang L, Lan WJ, Li HJ. Two new hirsutane-type sesquiterpenoids chondrosterins N and O from the marine fungus Chondrostereum sp. Nat Prod Res 2017; 32:1578-1582. [PMID: 29047313 DOI: 10.1080/14786419.2017.1389935] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The marine fungus Chondrostereum sp. was collected from a soft coral Sarcophyton tortuosum from the South China Sea. This fungus was cultured in glucose-peptone-yeast (GPY) medium and the culture broth was extracted with EtOAc. By the method of 1H NMR pre-screening and tracing the diagnostic proton signals of the methyl groups, two new hirsutane-type sesquiterpenoids, chondrosterins N and O (1 and 2) were isolated from the metabolite extracts. Their structures were elucidated on the basis of MS, 1D and 2D NMR data.
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Affiliation(s)
- Lei Huang
- a School of Chemistry , Sun Yat-sen University , Guangzhou , China
| | - Wen-Jian Lan
- b School of Pharmaceutical Sciences , Sun Yat-sen University , Guangzhou , China.,c Guangdong Technology Research Center for Advanced Chinese Medicine , Guangzhou , China
| | - Hou-Jin Li
- a School of Chemistry , Sun Yat-sen University , Guangzhou , China
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10
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Yan Q, Bolte B, Bai Y, Banwell MG, Willis AC, Carr PD. Studies on the Photochemical Rearrangements of Enantiomerically Pure, Polysubstituted, and Variously Annulated Bicyclo[2.2.2]octenones. J Org Chem 2017; 82:8008-8022. [DOI: 10.1021/acs.joc.7b01243] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Qiao Yan
- Research School of Chemistry,
Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601, Australia
| | - Benoit Bolte
- Research School of Chemistry,
Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601, Australia
| | - Yuhua Bai
- Research School of Chemistry,
Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601, Australia
| | - Martin G. Banwell
- Research School of Chemistry,
Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601, Australia
| | - Anthony C. Willis
- Research School of Chemistry,
Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601, Australia
| | - Paul D. Carr
- Research School of Chemistry,
Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601, Australia
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11
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12
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Helaly SE, Richter C, Thongbai B, Hyde KD, Stadler M. Lentinulactam, a hirsutane sesquiterpene with an unprecedented lactam modification. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.11.075] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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13
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Chang EL, Bolte B, Lan P, Willis AC, Banwell MG. Chemoenzymatic Total Syntheses of the Enantiomers of the Protoilludanes 8-Deoxydihydrotsugicoline and Radudiol. J Org Chem 2016; 81:2078-86. [PMID: 26840613 DOI: 10.1021/acs.joc.6b00043] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Chemoenzymatic and stereoselective total syntheses of the non-natural enantiomeric forms of the recently isolated protoilludane natural products 8-deoxydihydrotsugicoline (1) and radudiol (2) (viz. ent-1 and ent-2, respectively) are reported. The key steps involve the Diels-Alder cycloaddition of cyclopent-2-en-1-one to the acetonide derived from enantiomerically pure and enzymatically derived cis-1,2-dihydrocatechol 3, elaboration of the resulting adduct to the tricyclic ketone 12, and a photochemically promoted rearrangement of this last compound to the octahydro-1H-cyclobuta[e]indenone 13.
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Affiliation(s)
- Ee Ling Chang
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University , Canberra, ACT 2601, Australia
| | - Benoit Bolte
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University , Canberra, ACT 2601, Australia
| | - Ping Lan
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University , Canberra, ACT 2601, Australia
| | - Anthony C Willis
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University , Canberra, ACT 2601, Australia
| | - Martin G Banwell
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University , Canberra, ACT 2601, Australia
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14
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Sharma MK, Banwell MG, Willis AC. Chemoenzymatic Routes to Enantiomerically Enriched and Polyoxygenated Perhydro-3,5a-methanoindeno[4,5-c]furans Related to the Tashironin Class of Sesquiterpenes. J Org Chem 2015; 80:2930-6. [DOI: 10.1021/acs.joc.5b00303] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mukesh K. Sharma
- Research
School of Chemistry,
Institute of Advanced Studies, The Australian National University, Canberra ACT 2601, Australia
| | - Martin G. Banwell
- Research
School of Chemistry,
Institute of Advanced Studies, The Australian National University, Canberra ACT 2601, Australia
| | - Anthony C. Willis
- Research
School of Chemistry,
Institute of Advanced Studies, The Australian National University, Canberra ACT 2601, Australia
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15
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Abstract
This review article focuses mainly on the scientific developments concerning the enzyme-mediated synthesis of sesquiterpenes which have been reported in the academic and patent literature during the last twenty years. Nevertheless, this is not a comprehensive description of every single biotransformation involving sesquiterpenes. Only synthetic approaches that have represented a new and innovative perspective from a scientific standpoint are reported. More specifically, the review describes in depth how the use of metabolic engineering of the microbial biotransformations and of the isolated enzymes were exploited in order to perform chemo- and stereoselective chemical transformations of interest for sesquiterpenes synthesis.
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Affiliation(s)
- Stefano Serra
- C.N.R., Istituto di Chimica del Riconoscimento Molecolare; Via L. Mancinelli 7, 20131 Milano, Italy
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16
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Lan P, Banwell MG, Willis AC. Chemoenzymatic Synthesis of the Enantiomer of 4,12-Dihydroxysterpurene, the Structure Assigned to a Metabolite Isolated from the Culture Broth of Stereum purpureum. Org Lett 2014; 17:166-9. [DOI: 10.1021/ol5034817] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ping Lan
- Research School of Chemistry,
Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601, Australia
| | - Martin G. Banwell
- Research School of Chemistry,
Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601, Australia
| | - Anthony C. Willis
- Research School of Chemistry,
Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601, Australia
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17
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Chang EL, Schwartz BD, Draffan AG, Banwell MG, Willis AC. A Chemoenzymatic and Fully Stereocontrolled Total Synthesis of the Antibacterial Natural Product (−)-Platencin. Chem Asian J 2014; 10:427-39. [DOI: 10.1002/asia.201403069] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Indexed: 12/25/2022]
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18
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Grillet F, Brummond KM. Enantioselective synthesis of 5,7-bicyclic ring systems from axially chiral allenes using a Rh(I)-catalyzed cyclocarbonylation reaction. J Org Chem 2013; 78:3737-54. [PMID: 23485149 PMCID: PMC3634128 DOI: 10.1021/jo4002432] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A transfer of chirality in an intramolecular Rh(I)-catalyzed allenic Pauson-Khand reaction (APKR) to access tetrahydroazulenones, tetrahydrocyclopenta[c]azepinones and dihydrocyclopenta[c]oxepinones enantioselectively (22-99% ee) is described. The substitution pattern of the allene affected the transfer of chiral information. Complete transfer of chirality was obtained for all trisubstituted allenes, but loss of chiral information was observed for disubstituted allenes. This work constitutes the first demonstration of a transfer of chiral information from an allene to the 5-position of a cyclopentenone using a cyclocarbonylation reaction. The absolute configuration of the corresponding cyclocarbonylation product was also established, something that is rarely done.
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Affiliation(s)
- Francois Grillet
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260 USA
| | - Kay M. Brummond
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260 USA
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19
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Yamada K, Masaki K, Hagimoto Y, Kamiya S, Kunishima M. A new method using 2-chloro-4,6-dimethoxy-1,3,5-triazine for facile elimination of dimethylamino group in Eschenmoser’s methylenation for synthesis of α,β-unsaturated esters. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.01.092] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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20
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Bon DJY, Banwell MG, Ward JS, Willis AC. From toluene to triquinanes: formal total syntheses of the sesquiterpenoid natural products (−)-hypnophilin and (−)-coriolin. Tetrahedron 2013. [DOI: 10.1016/j.tet.2012.11.069] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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21
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Abstract
In this chapter, most of the reported work deals with the photochemistry of carbonyl compounds; however, the photoreactions of other functions, such as the photo-Claisen rearrangement or the photocleavage of cyclic ethers, are also included. In the present volume, time coverage is 2010–2011, and only original research articles are quoted. In general, reviews or purely theoretical calculations are not systematically included. As usually, the material is organized according to established types of reactions (e.g., Norrish I/II, hydrogen abstraction, Paternò-Büchi, photoelimination, photo-Fries/photo-Claisen, etc.). After presenting the basic photochemical aspects, more specific findings are reported. They include synthetic applications, stereoselectivity, and biological or technological implications. Next, the attention is focused on photochemical reactions in anisotropic media, including (micro)heterogeneous or supramolecular systems, solid matrixes or fully organized crystals. Finally, mechanistic studies based on direct experimental evidence are highlighted, especially when transient absorption spectroscopy or related ultrafast detection are employed.
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Affiliation(s)
- M. Consuelo Jiménez
- Departamento de Química, Instituto de Tecnología Química UPV-CSIC Universidad Politécnica de Valencia camino de Vera s/n, E-46022 Valencia Spain
| | - Miguel A. Miranda
- Departamento de Química, Instituto de Tecnología Química UPV-CSIC Universidad Politécnica de Valencia camino de Vera s/n, E-46022 Valencia Spain
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22
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Ali Khan M, Mahon MF, Lowe JP, Stewart AJW, Lewis SE. Valuable New Cyclohexadiene Building Blocks from Cationic η5-Iron-Carbonyl Complexes Derived from a Microbial Arene Oxidation Product. Chemistry 2012; 18:13480-93. [DOI: 10.1002/chem.201202411] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2012] [Indexed: 11/08/2022]
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23
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Sharma MK, Banwell MG, Willis AC, Rae AD. Approaches to the Neurotrophically Active Natural Product 11-O-Debenzoyltashironin: A Chemoenzymatic Total Synthesis of the Structurally Related Sesquiterpene Khusiol. Chem Asian J 2012; 7:676-9. [DOI: 10.1002/asia.201100913] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2011] [Indexed: 11/09/2022]
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24
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Boyd DR, Bell M, Dunne KS, Kelly B, Stevenson PJ, Malone JF, Allen CCR. Chemoenzymatic synthesis of a mixed phosphine–phosphine oxide catalyst and its application to asymmetric allylation of aldehydes and hydrogenation of alkenes. Org Biomol Chem 2012; 10:1388-95. [DOI: 10.1039/c1ob06599h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Bon DJYD, Banwell MG, Cade IA, Willis AC. The total synthesis of (−)-connatusin A, a hirsutane-type sesquiterpene isolated from the fungus Lentinus connatus BCC8996. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.08.057] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Boyd DR, Sharma ND, Kaik M, Bell M, Berberian MV, McIntyre PBA, Kelly B, Hardacre C, Stevenson PJ, Allen CCR. Cycloalkenyl Halide Substitution Reactions of Enantiopure Arene cis-Tetrahydrodiols with Boron, Nitrogen and Phosphorus Nucleophiles. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201100273] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Bach T, Hehn JP. Photochemical reactions as key steps in natural product synthesis. Angew Chem Int Ed Engl 2011; 50:1000-45. [PMID: 21246702 DOI: 10.1002/anie.201002845] [Citation(s) in RCA: 589] [Impact Index Per Article: 45.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2010] [Indexed: 12/15/2022]
Abstract
Photochemical reactions contribute in a significant way to the existing repertoire of carbon-carbon bond-forming reactions by allowing access to exceptional molecular structures that cannot be obtained by conventional means. In this Review, the most important photochemical transformations that have been employed in natural product synthesis are presented. Selected total syntheses are discussed as examples, with particular attention given to the photochemical key step and its stereoselectivity. The structural relationship between the photochemically generated molecule and the natural product is shown, and, where necessary, the consecutive reactions in the synthesis are illustrated and classified.
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Affiliation(s)
- Thorsten Bach
- Lehrstuhl für Organische Chemie I, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching, Germany.
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Bach T, Hehn JP. Photochemische Reaktionen als Schlüsselschritte in der Naturstoffsynthese. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201002845] [Citation(s) in RCA: 177] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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