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Sharma H, Ganguly S, Sahana MH, Goswami RK. Stereoselective synthesis of thailandamide A methyl ester. Org Biomol Chem 2024; 22:1409-1419. [PMID: 38285182 DOI: 10.1039/d3ob02107f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2024]
Abstract
A convergent strategy for the stereoselective synthesis of the methyl ester of the structurally challenging and highly labile antibacterial polyene polyketide natural product thailandamide A has been developed. The key steps include the Zincke aldehyde reaction, Stille cross coupling, Negishi reaction, Julia-Kocienski olefination, cross metathesis, and the less explored Pd(I)-based Heck coupling to access different unsaturation bonds. Additionally, Urpi acetal aldol, Evans methylation, and Crimmins acetate aldol reactions were employed to construct four out of six asymmetric centers of the molecule.
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Affiliation(s)
- Himangshu Sharma
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata-700032, India.
| | - Swapnamoy Ganguly
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata-700032, India.
| | - Moinul Haque Sahana
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata-700032, India.
| | - Rajib Kumar Goswami
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata-700032, India.
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2
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Sharma H, Mondal J, Ghosh AK, Pal RR, Goswami RK. Total synthesis of the antibacterial polyketide natural product thailandamide lactone. Chem Sci 2022; 13:13403-13408. [PMID: 36507156 PMCID: PMC9682914 DOI: 10.1039/d2sc04727f] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 10/20/2022] [Indexed: 12/15/2022] Open
Abstract
Stereoselective total synthesis of the structurally intriguing polyketide natural product thailandamide lactone was accomplished, and done so using a convergent approach for the first time to the best of our knowledge. The key features of this synthesis included use of a Crimmins acetate aldol reaction, Evans methylation, Urpi acetal aldol reaction, Sharpless asymmetric epoxidation and subsequent γ-lactonization for the installation of six asymmetric centers and the use of the Negishi reaction, Julia-Kocienski olefination, cross metathesis, HWE olefination and intermolecular Heck coupling for construction of a variety of unsaturated linkages. Pd(i)-based Heck coupling was introduced, for the first time to the best of our knowledge, quite efficiently to couple the major eastern and sensitive western segments of the molecule. The antibacterial activity of thailandamide lactone was also evaluated.
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Affiliation(s)
- Himangshu Sharma
- School of Chemical Sciences, Indian Association for the Cultivation of Science Jadavpur Kolkata-700032 India
| | - Joyanta Mondal
- School of Chemical Sciences, Indian Association for the Cultivation of Science Jadavpur Kolkata-700032 India
| | - Ananyo K Ghosh
- School of Biological Sciences, Indian Association for the Cultivation of Science Jadavpur Kolkata-700032 India
| | - Ritesh Ranjan Pal
- School of Biological Sciences, Indian Association for the Cultivation of Science Jadavpur Kolkata-700032 India
| | - Rajib Kumar Goswami
- School of Chemical Sciences, Indian Association for the Cultivation of Science Jadavpur Kolkata-700032 India
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3
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Exploring Short and Efficient Synthetic Routes Using Titanocene(III)-Catalyzed Reactions: Total Synthesis of Natural Meroterpenes with Trisubstituted Unsaturations. Molecules 2022; 27:molecules27082400. [PMID: 35458598 PMCID: PMC9031794 DOI: 10.3390/molecules27082400] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 04/01/2022] [Accepted: 04/05/2022] [Indexed: 12/21/2022] Open
Abstract
The stereo- and regioselective total syntheses of OMe derivatives of the scarce bioactive meroterpenoids makassaric acid (1) and fascioquinol B (2) have been accomplished. The synthetic sequences are based on the following three efficient and selective catalytic reactions: Cu-catalyzed addition of Grignard compounds to an epoxide; a regioselective Barbier-type reaction, catalyzed by Cp2TiCl; and regio- and stereoselective bioinspired cyclization, also catalyzed by Cp2TiCl. These three key processes allow us to obtain the main skeletons of 1 and 2 in a few steps. The valuable synthetic proposal shown in this work provides fast access to scarce, structurally complex meroterpenes with promising biological activities, which are a sustainable source for later studies and applications in medicine.
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Abstract
Total synthesis of marine secondary metabolite nafuredin B has been achieved for the first time using a convergent strategy. Sharpless epoxidation followed by acid catalyzed epoxide opening were adopted to install the tetrasubstituted hydroxy center, whereas the iterative Julia-Kocienski olefination, Wittig olefination and HWE olefination afforded the olefin bonds. Ring closing metathesis in the presence of a free tetrasubstituted hydroxy group provided the unsaturated δ-lactone moiety. This synthetic study provided unambiguous structural confirmation of the isolated nafuredin B.
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Affiliation(s)
- Gour Hari Mandal
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata-700032, India.
| | - Dhiman Saha
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata-700032, India.
| | - Rajib Kumar Goswami
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata-700032, India.
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5
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González-Delgado JA, Arteaga JF. Control of Homocoupling Versus Reduction in Titanium(III)-Mediated Radical Opening of Styrene Oxides. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901625] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- José A. González-Delgado
- CIQSO-Center for Research in Sustainable Chemistry and Department of Chemistry; University of Huelva; Campus de El Carmen s/n E-21071 Huelva Spain
| | - Jesús F. Arteaga
- CIQSO-Center for Research in Sustainable Chemistry and Department of Chemistry; University of Huelva; Campus de El Carmen s/n E-21071 Huelva Spain
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6
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Fontaneda R, Fañanás FJ, Rodríguez F. Construction of a diverse set of terpenoid decalin subunits from a common enantiomerically pure scaffold obtained by a biomimetic cationic cyclization. Chem Commun (Camb) 2018; 54:11025-11028. [DOI: 10.1039/c8cc07281g] [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
An unprecedented biomimetic cationic cyclization reaction is used for the synthesis of an enantiomerically pure scaffold that is easily transformed into a set of structurally diverse decalin derivatives with potential application in the synthesis of targeted natural products and/or natural-product-inspired new molecules.
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Affiliation(s)
- Raquel Fontaneda
- Instituto Universitario de Química Organometálica “Enrique Moles”, Universidad de Oviedo
- 33006-Oviedo
- Spain
| | - Francisco J. Fañanás
- Instituto Universitario de Química Organometálica “Enrique Moles”, Universidad de Oviedo
- 33006-Oviedo
- Spain
| | - Félix Rodríguez
- Instituto Universitario de Química Organometálica “Enrique Moles”, Universidad de Oviedo
- 33006-Oviedo
- Spain
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7
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Nakamura Y, Paetz C, Boland W. Synthesis of methyl 4-dihydrotrisporate B and methyl trisporate B, morphogenetic factors of Zygomycetes fungi. ACTA ACUST UNITED AC 2017; 73:59-66. [DOI: 10.1515/znc-2017-0148] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2017] [Accepted: 10/12/2017] [Indexed: 11/15/2022]
Abstract
Abstract
(9Z)-Methyl 4-dihydrotrisporate B and (9Z)-methyl trisporate B, pheromones of Zygomycetes fungi, have been synthesized using Stille cross-coupling from previously described cyclohexenone precursors. Conducting the coupling without protection groups allowed for a short and stereospecific synthesis route of the late trisporoids. Stability studies for both the compounds revealed (9Z)-methyl trisporate B to be very unstable against UV irradiation.
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Affiliation(s)
- Yoko Nakamura
- Max Planck Institute for Chemical Ecology , Department of Bioorganic Chemistry , Jena , Germany
| | - Christian Paetz
- Max Planck Institute for Chemical Ecology , Biosynthesis/NMR , Jena , Germany
| | - Wilhelm Boland
- Max Planck Institute for Chemical Ecology , Department of Bioorganic Chemistry , Hans-Knöll-Straße 8 , 07745 Jena , Germany
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8
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Barrero AF, del Pino MMH, Arteaga JF, González-Delgado JA. Occurrence and Chemical Synthesis of Apocarotenoids from Mucorales: A Review. Nat Prod Commun 2017. [DOI: 10.1177/1934578x1701200518] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Apocarotenoids are metabolites originated by degradation of carotenes through the loss of carbon atoms placed at the side chain of their structure as consequence of oxydative reactions. We present here the first review of apocarotenoids in the fungi mucorales Phycomyces blakesleeanus, Blakeslea trispora and Mucor mucedo. This review is divided into two parts: the first one presents their structures and sources, whereas the second part is dedicated to their chemical synthesis.
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Affiliation(s)
- Alejandro F. Barrero
- Department of Organic Chemistry. Institute of Biotechnology, University of Granada, Campus de Fuente Nueva, s/n, 18071 Granada, Spain
| | - M. Mar Herrador del Pino
- Department of Organic Chemistry. Institute of Biotechnology, University of Granada, Campus de Fuente Nueva, s/n, 18071 Granada, Spain
| | - Jesús F. Arteaga
- CIQSO-Center for Research in Sustainable Chemistry, University of Huelva, 21071 Huelva, Spain
- Department of Chemistry, Campus de El Carmen, University of Huelva, 21071 Huelva, Spain
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9
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González-Delgado JA, Romero MA, Pischel U, Arteaga JF. Universal access to megastigmanes through controlled cyclisation towards highly substituted cyclohexenes. Org Biomol Chem 2017; 15:408-415. [PMID: 27924327 DOI: 10.1039/c6ob02587k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the selective formation of cyclohexenes with a tetrasubstituted double bond, the structural key element of megastigmanes. For this purpose the ZrCl4-mediated epoxide ring opening of epoxy-geranylacetone was employed. This approach provides a universal entry to the preparation of the members of the megastigmane family, which was exemplified in the asymmetric synthesis of tectoionol B.
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Affiliation(s)
- José A González-Delgado
- CIQSO - Centre for Research in Sustainable Chemistry and Department of Chemistry, University of Huelva, Campus de El Carmen s/n, 21071 Huelva, Spain.
| | - Miguel A Romero
- CIQSO - Centre for Research in Sustainable Chemistry and Department of Chemistry, University of Huelva, Campus de El Carmen s/n, 21071 Huelva, Spain.
| | - Uwe Pischel
- CIQSO - Centre for Research in Sustainable Chemistry and Department of Chemistry, University of Huelva, Campus de El Carmen s/n, 21071 Huelva, Spain.
| | - Jesús F Arteaga
- CIQSO - Centre for Research in Sustainable Chemistry and Department of Chemistry, University of Huelva, Campus de El Carmen s/n, 21071 Huelva, Spain.
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10
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Wang Z, Qi W, Yan Y, Hu Y, Song L. Efficient and highly selective cyclization induced by Lewis acid to generate 2-hydroxyl- α-cyclogeraniol. SYNTHETIC COMMUN 2016. [DOI: 10.1080/00397911.2016.1239739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Zi Wang
- College of Science, China University of Petroleum (East China), Qingdao, China
| | - Weiyi Qi
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Yixuan Yan
- School of Pharmacy Lanzhou University, Lanzhou, Gansu, China
| | - Youhong Hu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Linhua Song
- College of Science, China University of Petroleum (East China), Qingdao, China
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11
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González-Delgado JA, Prieto C, Enríquez L, Jaraíz M, López-Pérez JL, Barrero AF, Arteaga JF. Ti-Mediated Efficient Reductive Dehalogenation of Carbon-Halogen Bonds. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201600169] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- José A. González-Delgado
- CIQSO-Center for Research in Sustainable Chemistry, and Department of Chemistry; University of Huelva; Campus el Carmen 21071 Huelva Spain
| | - Consuelo Prieto
- Department of Organic Chemistry and Institute of Biotechnology; University of Granada; Avda. Fuentenueva s/n 18071 Granada Spain
| | - Lourdes Enríquez
- Department of Electrical and Electronics; University of Valladolid; Paseo Belen 15 47011 Valladolid Spain
| | - Martín Jaraíz
- Department of Electrical and Electronics; University of Valladolid; Paseo Belen 15 47011 Valladolid Spain
| | - José L. López-Pérez
- Department of Pharmaceutical Chemistry-IBSAL-CIETUS; University of Salamanca; Avda. Campo Charro s/n 37071 Salamanca Spain
| | - Alejandro F. Barrero
- Department of Organic Chemistry and Institute of Biotechnology; University of Granada; Avda. Fuentenueva s/n 18071 Granada Spain
| | - Jesús F. Arteaga
- CIQSO-Center for Research in Sustainable Chemistry, and Department of Chemistry; University of Huelva; Campus el Carmen 21071 Huelva Spain
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12
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Alcalde E, Medina HR, Herrador MM, Barrero AF, Cerdá-Olmedo E. Cyclofarnesoids and methylhexanoids produced from β-carotene in Phycomyces blakesleeanus. PHYTOCHEMISTRY 2016; 124:38-45. [PMID: 26854131 DOI: 10.1016/j.phytochem.2016.01.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2015] [Revised: 01/11/2016] [Accepted: 01/20/2016] [Indexed: 06/05/2023]
Abstract
The oxidative cleavage of β-carotene in the Mucorales produces three fragments of 18, 15, and 7 carbons, respective heads of three families of apocarotenoids: the methylhexanoids, the trisporoids, and the cyclofarnesoids (named after their 1,6-cyclofarnesane skeleton). The apocarotenoids are easily recognized because they are absent in white mutants unable to produce β-carotene. In cultures of Phycomyces blakesleeanus we detected thirty-two apocarotenoids by LC, UV absorbance, and MS. With additional IR and NMR we identified two methylhexanoids and the eight most abundant cyclofarnesoids. Four of them were previously-unknown natural compounds, including 4-dihydrocyclofarnesine S, the most abundant cyclofarnesoid in young cultures. We arranged the apocarotenoids of the Mucorales in a scheme that helps classifying and naming them and suggests possible metabolites and biosynthetic pathways. We propose specific biosynthetic pathways for cyclofarnesoids and methylhexanoids based on structural comparisons, the time course of appearance of individual compounds, and the bioconversion of β-apo-12-carotenol, an early precursor, to three more oxygenated cyclofarnesoids by the white mutants. Some of the reactions occur spontaneously in the increasingly acidic culture media. Mating increased the contents of methylhexanoids and cyclofarnesoids by ca. threefold in young cultures and ca. twelvefold in old ones (five days); cyclofarnesine S, the most abundant cyclofarnesoid in old cultures, increased over one hundredfold. We found no differences between the sexes and no activity as sexual pheromones, but we suggest that methylhexanoids and cyclofarnesoids could mediate species-specific physiology and behavior.
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Affiliation(s)
- Eugenio Alcalde
- Departamento de Genética, Universidad de Sevilla, Apartado 1095, E-41080 Sevilla, Spain.
| | - Humberto R Medina
- Departamento de Genética, Universidad de Sevilla, Apartado 1095, E-41080 Sevilla, Spain.
| | - M Mar Herrador
- Departamento de Química Orgánica, Instituto de Biotecnología, Universidad de Granada, Fuente Nueva s/n, E-18071 Granada, Spain.
| | - Alejandro F Barrero
- Departamento de Química Orgánica, Instituto de Biotecnología, Universidad de Granada, Fuente Nueva s/n, E-18071 Granada, Spain.
| | - Enrique Cerdá-Olmedo
- Departamento de Genética, Universidad de Sevilla, Apartado 1095, E-41080 Sevilla, Spain.
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13
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González-Delgado JA, Escobar G, Arteaga JF, Barrero AF. Easy access to a cyclic key intermediate for the synthesis of trisporic acids and related compounds. Molecules 2014; 19:1748-62. [PMID: 24496268 PMCID: PMC6271007 DOI: 10.3390/molecules19021748] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Revised: 01/22/2014] [Accepted: 01/23/2014] [Indexed: 11/16/2022] Open
Abstract
The synthesis of a cyclohexane skeleton possessing different oxygenated functional groups at C–3, C–8 and C–9, and a Δ1,6-double bond has been accomplished in 10 steps with an overall 17% yield. This compound is a key intermediate for access to a wide range of compounds of the bioactive trisporoid family. The synthetic sequence consists of the preparation of a properly functionalized epoxygeraniol derivative, and its subsequent stereoselective cyclization mediated by Ti(III). This last step implies a domino process that starts with a homolytic epoxide opening followed by a radical cyclization and regioselective elimination. This concerted process gives access to the cyclohexane moiety with stereochemical control of five of its six carbon atoms.
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Affiliation(s)
- José A González-Delgado
- Department of Organic Chemistry and Institute of Biotechnology, University of Granada, Avda Fuentenueva s/n, 18071 Granada, Spain
| | - Gustavo Escobar
- Department of Organic Chemistry and Institute of Biotechnology, University of Granada, Avda Fuentenueva s/n, 18071 Granada, Spain
| | - Jesús F Arteaga
- CIQSO-Center for Research in Sustainable Chemistry and Department of Chemical Engineering, Physical Chemistry and Organic Chemistry, University of Huelva, Avda 3 Marzo s/n, 21071 Huelva, Spain.
| | - Alejandro F Barrero
- Department of Organic Chemistry and Institute of Biotechnology, University of Granada, Avda Fuentenueva s/n, 18071 Granada, Spain.
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14
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Morcillo SP, Miguel D, Campaña AG, Álvarez de Cienfuegos L, Justicia J, Cuerva JM. Recent applications of Cp2TiCl in natural product synthesis. Org Chem Front 2014. [DOI: 10.1039/c3qo00024a] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Titanocene(iii)-based approaches have been demonstrated to be useful in the straightforward syntheses of many natural products from readily available starting materials.
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Affiliation(s)
- Sara P. Morcillo
- Department of Organic Chemistry
- University of Granada
- Granada 18071, Spain
| | - Delia Miguel
- Department of Organic Chemistry
- University of Granada
- Granada 18071, Spain
| | - Araceli G. Campaña
- Department of Organic Chemistry
- University of Granada
- Granada 18071, Spain
| | | | - José Justicia
- Department of Organic Chemistry
- University of Granada
- Granada 18071, Spain
| | - Juan M. Cuerva
- Department of Organic Chemistry
- University of Granada
- Granada 18071, Spain
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