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Cheng HG, Yang Z, Chen R, Cao L, Tong WY, Wei Q, Wang Q, Wu C, Qu S, Zhou Q. A Concise Total Synthesis of (-)-Berkelic Acid. Angew Chem Int Ed Engl 2021; 60:5141-5146. [PMID: 33252181 DOI: 10.1002/anie.202014660] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 11/27/2020] [Indexed: 12/19/2022]
Abstract
Reported here is a concise total synthesis of (-)-berkelic acid in eight linear steps. This synthesis features a Catellani reaction/oxa-Michael cascade for the construction of the isochroman scaffold, a one-pot deprotection/spiroacetalization operation for the formation of the tetracyclic core structure, and a late-stage Ni-catalyzed reductive coupling for the introduction of the lateral chain. Notably, four stereocenters are established from a single existing chiral center with excellent stereocontrol during the deprotection/spiroacetalization process. Stereocontrol of the intriguing deprotection/spiroacetalization process is supported by DFT calculations.
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Affiliation(s)
- Hong-Gang Cheng
- Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Zhenjie Yang
- Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Ruiming Chen
- Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Liming Cao
- Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Wen-Yan Tong
- College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
| | - Qiang Wei
- Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Qingqing Wang
- Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Chenggui Wu
- Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Shuanglin Qu
- College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
| | - Qianghui Zhou
- Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China.,The Institute for Advanced Studies, Wuhan University, Wuhan, 430072, China
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2
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Cheng H, Yang Z, Chen R, Cao L, Tong W, Wei Q, Wang Q, Wu C, Qu S, Zhou Q. A Concise Total Synthesis of (−)‐Berkelic Acid. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202014660] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Hong‐Gang Cheng
- Sauvage Center for Molecular Sciences Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education) College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 China
| | - Zhenjie Yang
- Sauvage Center for Molecular Sciences Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education) College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 China
| | - Ruiming Chen
- Sauvage Center for Molecular Sciences Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education) College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 China
| | - Liming Cao
- Sauvage Center for Molecular Sciences Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education) College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 China
| | - Wen‐Yan Tong
- College of Chemistry and Chemical Engineering Hunan University Changsha 410082 China
| | - Qiang Wei
- Sauvage Center for Molecular Sciences Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education) College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 China
| | - Qingqing Wang
- Sauvage Center for Molecular Sciences Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education) College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 China
| | - Chenggui Wu
- Sauvage Center for Molecular Sciences Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education) College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 China
| | - Shuanglin Qu
- College of Chemistry and Chemical Engineering Hunan University Changsha 410082 China
| | - Qianghui Zhou
- Sauvage Center for Molecular Sciences Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education) College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 China
- The Institute for Advanced Studies Wuhan University Wuhan 430072 China
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3
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Polyunsaturated C-Glycosidic 4-Hydroxy-2-pyrone Derivatives: Total Synthesis Shows that Putative Orevactaene Is Likely Identical with Epipyrone A. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201702189] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Preindl J, Schulthoff S, Wirtz C, Lingnau J, Fürstner A. Polyunsaturated C-Glycosidic 4-Hydroxy-2-pyrone Derivatives: Total Synthesis Shows that Putative Orevactaene Is Likely Identical with Epipyrone A. Angew Chem Int Ed Engl 2017; 56:7525-7530. [DOI: 10.1002/anie.201702189] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 04/03/2017] [Indexed: 01/08/2023]
Affiliation(s)
- Johannes Preindl
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | | | - Conny Wirtz
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | - Julia Lingnau
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
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Arto T, de Santa-María IS, Chiara MD, Fañanás FJ, Rodríguez F. Berkelic Acid: Straightforward Analogue Synthesis and Studies of Activity Against Selected Cancer Cell Lines. European J Org Chem 2016. [DOI: 10.1002/ejoc.201601194] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Tamara Arto
- Instituto Universitario de Química Organometálica “Enrique Moles”; Universidad de Oviedo; Julián Clavería, 8 E-33006 Oviedo Spain
| | - Inés Sáenz de Santa-María
- Servicio de Otorrinolaringología; Hospital Universitario Central de Asturias; Instituto Universitario de Oncología del Principado de Asturias; Universidad de Oviedo; E-33006 Oviedo Spain
| | - María-Dolores Chiara
- Servicio de Otorrinolaringología; Hospital Universitario Central de Asturias; Instituto Universitario de Oncología del Principado de Asturias; Universidad de Oviedo; E-33006 Oviedo Spain
| | - Francisco J. Fañanás
- Instituto Universitario de Química Organometálica “Enrique Moles”; Universidad de Oviedo; Julián Clavería, 8 E-33006 Oviedo Spain
| | - Félix Rodríguez
- Instituto Universitario de Química Organometálica “Enrique Moles”; Universidad de Oviedo; Julián Clavería, 8 E-33006 Oviedo Spain
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Xue J, Zhang H, Tian T, Yin K, Liu D, Jiang X, Li Y, Jin X, Yao X. Organohalogenite-Catalyzed Spiroketalization: Enantioselective Synthesis of Bisbenzannulated Spiroketal Cores. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201500390] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Willwacher J, Heggen B, Wirtz C, Thiel W, Fürstner A. Total Synthesis, Stereochemical Revision, and Biological Reassessment of Mandelalide A: Chemical Mimicry of Intrafamily Relationships. Chemistry 2015; 21:10416-30. [PMID: 26094957 DOI: 10.1002/chem.201501491] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Indexed: 11/06/2022]
Abstract
Mandelalide A and three congeners had recently been isolated as the supposedly highly cytotoxic principles of an ascidian collected off the South African coastline. Since these compounds are hardly available from the natural source, a concise synthesis route was developed, targeting structure 1 as the purported representation of mandelalide A. The sequence involves an iridium-catalyzed two-directional Krische allylation and a cobalt-catalyzed carbonylative epoxide opening as entry points for the preparation of the major building blocks. The final stages feature the first implementation of terminal acetylene metathesis into natural product total synthesis, which is remarkable in that this class of substrates had been beyond the reach of alkyne metathesis for decades. Synthetic 1, however, proved not to be identical with the natural product. In an attempt to clarify this issue, NMR spectra were simulated for 20 conceivable diastereomers by using DFT followed by DP4 analysis; however, this did not provide a reliable assignment either. The puzzle was ultimately solved by the preparation of three diastereomers, of which compound 6 proved identical with mandelalide A in all analytical and spectroscopic regards. As the entire "northern sector" about the tetrahydrofuran ring in 6 shows the opposite configuration of what had originally been assigned, it is highly likely that the stereostructures of the sister compounds mandelalides B-D must be corrected analogously; we propose that these natural products are accurately represented by structures 68-70. In an attempt to prove this reassignment, an entry into mandelalides C and D was sought by subjecting an advanced intermediate of the synthesis of 6 to a largely unprecedented intramolecular Morita-Baylis-Hillman reaction, which furnished the γ-lactone derivative 74 as a mixture of diastereomers. Whereas (24R)-74 was amenable to a hydroxyl-directed dihydroxylation by using OsO4 /TMEDA as the reagent, the sister compound (24S)-74 did not follow a directed path but simply obeyed Kishi's rule; only this unexpected escape precluded the preparation of mandelalides C and D by this route. A combined spectroscopic and computational (DFT) study showed that the reasons for this strikingly different behavior of the two diastereomers of 74 are rooted in their conformational peculiarities. This aspect apart, our results show that the OsO4 /TMEDA complex reacts preferentially with electron deficient double bonds even if other alkenes are present that are more electron rich and less encumbered. Finally, in a brief biological survey authentic mandelalide A (6) was found to exhibit appreciable cytotoxicity only against one out of three tested human cancer cell lines and all synthetic congeners were hardly active. No significant fungicidal properties were observed.
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Affiliation(s)
- Jens Willwacher
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany)
| | - Berit Heggen
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany)
| | - Conny Wirtz
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany)
| | - Walter Thiel
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany)
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany).
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Willwacher J, Fürstner A. Catalysis-Based Total Synthesis of Putative Mandelalide A. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201400605] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Willwacher J, Fürstner A. Catalysis-Based Total Synthesis of Putative Mandelalide A. Angew Chem Int Ed Engl 2014; 53:4217-21. [DOI: 10.1002/anie.201400605] [Citation(s) in RCA: 98] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Indexed: 12/26/2022]
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Arlt A, Benson S, Schulthoff S, Gabor B, Fürstner A. A total synthesis of spirastrellolide A methyl ester. Chemistry 2013; 19:3596-608. [PMID: 23420709 DOI: 10.1002/chem.201203965] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2012] [Indexed: 01/30/2023]
Abstract
A concise total synthesis of spirastrellolide A methyl ester (1 a, R(1) =Me) as the parent compound of a series of highly cytotoxic marine macrolides is disclosed, which exploits and expands the flexibility of a synthesis plan previously developed by our group en route to the sister compound spirastrellolide F methyl ester (6 a, R(1) =Me). Key to success was the masking of the signature Δ(15,16) -bond of 1 a as a C16-carbonyl group until after the stereogenic center at C24 had been properly set by a highly selective hydrogenation of the C24 exo-methylene precursor 66. Conformational control over the macrocyclic frame allowed the proper stereochemical course to be dialed into this reduction process. The elaboration of the C16 ketone to the C15-C16 double bond was accomplished by a chemoselective alkenyl triflate formation followed by a palladium-catalyzed hydride delivery. The role of the ketone at C16 as a strategic design element is also evident up-stream of the key intermediate 66, the assembly of which hinged upon the addition of the polyfunctionalized dithiane 37 to the similarly elaborate aldehyde fragment 46. Other crucial steps of the total synthesis were an alkyl-Suzuki coupling and a Yamaguchi lactonization that allowed the Northern and the Southern sector of the target to be stitched together and the macrocyclic perimeter to be forged. The lateral chain comprising the remote C46 stereocenter was finally attached to the core region by a modified Julia-Kocienski olefination. The preparation of the individual building blocks led to some methodological spin-offs, amongst which the improved procedure for the N-O-bond cleavage of isoxazolines by zero-valent molybdenum and the ozonolysis of a double bond in the presence of other oxidation-prone functionality are most noteworthy. Preliminary biological data suggest that the entire carbon framework, that is the macrocyclic core plus the lateral chain, might be necessary for high cytotoxicity.
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Affiliation(s)
- Alexander Arlt
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr, Germany
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11
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Scalable Total Synthesis of (−)-Berkelic Acid by Using a Protecting-Group-Free Strategy. Angew Chem Int Ed Engl 2012; 51:4930-3. [DOI: 10.1002/anie.201109076] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Indexed: 01/25/2023]
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12
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Fañanás FJ, Mendoza A, Arto T, Temelli B, Rodríguez F. Scalable Total Synthesis of (−)-Berkelic Acid by Using a Protecting-Group-Free Strategy. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201109076] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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13
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Li X, Xue J, Huang C, Li Y. Copper(I)-Catalyzed Hydroalkoxylation/Hydrogen-Bonding-Induced Asymmetric Hetero-Diels-Alder Cycloaddition Cascade: An Approach to Aromatic Spiroketals. Chem Asian J 2012; 7:903-6. [DOI: 10.1002/asia.201101056] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2011] [Indexed: 11/10/2022]
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Larivée A, Unger JB, Thomas M, Wirtz C, Dubost C, Handa S, Fürstner A. The Leiodolide B Puzzle. Angew Chem Int Ed Engl 2010; 50:304-9. [DOI: 10.1002/anie.201005850] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Alexandre Larivée
- Max‐Planck‐Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany), Fax: (+49) 208‐306‐2994
| | - John B. Unger
- Max‐Planck‐Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany), Fax: (+49) 208‐306‐2994
| | - Mikaël Thomas
- Max‐Planck‐Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany), Fax: (+49) 208‐306‐2994
| | - Conny Wirtz
- Max‐Planck‐Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany), Fax: (+49) 208‐306‐2994
| | - Christophe Dubost
- Max‐Planck‐Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany), Fax: (+49) 208‐306‐2994
| | - Shinya Handa
- Max‐Planck‐Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany), Fax: (+49) 208‐306‐2994
| | - Alois Fürstner
- Max‐Planck‐Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany), Fax: (+49) 208‐306‐2994
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Larivée A, Unger JB, Thomas M, Wirtz C, Dubost C, Handa S, Fürstner A. The Leiodolide B Puzzle. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201005850] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Alexandre Larivée
- Max‐Planck‐Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany), Fax: (+49) 208‐306‐2994
| | - John B. Unger
- Max‐Planck‐Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany), Fax: (+49) 208‐306‐2994
| | - Mikaël Thomas
- Max‐Planck‐Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany), Fax: (+49) 208‐306‐2994
| | - Conny Wirtz
- Max‐Planck‐Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany), Fax: (+49) 208‐306‐2994
| | - Christophe Dubost
- Max‐Planck‐Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany), Fax: (+49) 208‐306‐2994
| | - Shinya Handa
- Max‐Planck‐Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany), Fax: (+49) 208‐306‐2994
| | - Alois Fürstner
- Max‐Planck‐Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany), Fax: (+49) 208‐306‐2994
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Snaddon TN, Buchgraber P, Schulthoff S, Wirtz C, Mynott R, Fürstner A. Total Synthesis of Berkelic Acid. Chemistry 2010; 16:12133-40. [DOI: 10.1002/chem.201001133] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Total Syntheses of Amphidinolides B1, B4, G1, H1 and Structure Revision of Amphidinolide H2. Chemistry 2009; 15:3983-4010. [DOI: 10.1002/chem.200802067] [Citation(s) in RCA: 98] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Abstract
An extremophilic challenge: Stereospecific condensation of a fully functionalized ketal aldehyde and a 2,6-dihydroxybenzoic acid is the key step in the synthesis of (-)-berkelic acid confirming Fürstner's reassignment of the stereochemistry at C18 and C19, establishing the absolute stereochemistry, and tentatively assigning the stereochemistry at C22.
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Affiliation(s)
- Xiaoxing Wu
- Department of Chemistry, MS 015, Brandeis University, Waltham, MA 02454-9110, USA
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Barluenga J, Mendoza A, Rodríguez F, Fañanás F. A Palladium(II)-Catalyzed Synthesis of Spiroacetals through a One-Pot Multicomponent Cascade Reaction. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200805519] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Barluenga J, Mendoza A, Rodríguez F, Fañanás F. A Palladium(II)-Catalyzed Synthesis of Spiroacetals through a One-Pot Multicomponent Cascade Reaction. Angew Chem Int Ed Engl 2009; 48:1644-7. [DOI: 10.1002/anie.200805519] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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