1
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Khamrai A, Ganesh V. Benchtop nickel-catalyzed reductive coupling of aldehydes with alkynes and ynamides. Chem Commun (Camb) 2023; 59:11141-11144. [PMID: 37650134 DOI: 10.1039/d3cc03322h] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
We demonstrate the potential of Ni(COD)(DQ), a bench-stable Ni0 complex, as a catalyst for the reductive coupling of aldehydes with alkynes and ynamides, providing silylated allyl alcohols with excellent yields and regioselectivities. Mass spectrometric identification of the intermediates and DFT studies supported the proposed mechanism.
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Affiliation(s)
- Aankhi Khamrai
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India.
| | - Venkataraman Ganesh
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India.
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2
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Peña LF, González-Andrés P, Parte LG, Escribano R, Guerra J, Barbero A, López E. Continuous Flow Chemistry: A Novel Technology for the Synthesis of Marine Drugs. Mar Drugs 2023; 21:402. [PMID: 37504932 PMCID: PMC10381277 DOI: 10.3390/md21070402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 07/06/2023] [Accepted: 07/12/2023] [Indexed: 07/29/2023] Open
Abstract
In this perspective, we showcase the benefits of continuous flow chemistry and photochemistry and how these valuable tools have contributed to the synthesis of organic scaffolds from the marine environment. These technologies have not only facilitated previously described synthetic pathways, but also opened new opportunities in the preparation of novel organic molecules with remarkable pharmacological properties which can be used in drug discovery programs.
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Affiliation(s)
- Laura F Peña
- Department of Organic Chemistry, Campus Miguel Delibes, University of Valladolid, 47011 Valladolid, Spain
| | - Paula González-Andrés
- Department of Organic Chemistry, Campus Miguel Delibes, University of Valladolid, 47011 Valladolid, Spain
| | - Lucía G Parte
- Department of Organic Chemistry, Campus Miguel Delibes, University of Valladolid, 47011 Valladolid, Spain
| | - Raúl Escribano
- Department of Organic Chemistry, Campus Miguel Delibes, University of Valladolid, 47011 Valladolid, Spain
| | - Javier Guerra
- Department of Organic Chemistry, Campus Miguel Delibes, University of Valladolid, 47011 Valladolid, Spain
| | - Asunción Barbero
- Department of Organic Chemistry, Campus Miguel Delibes, University of Valladolid, 47011 Valladolid, Spain
| | - Enol López
- Department of Organic Chemistry, Campus Miguel Delibes, University of Valladolid, 47011 Valladolid, Spain
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3
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Evans DA, Beiger JJ, Burch JD, Fuller PH, Glorius F, Kattnig E, Thaisrivongs DA, Trenkle WC, Young JM, Zhang J. Total Synthesis of Aflastatin A. J Am Chem Soc 2022; 144:19953-19972. [PMID: 36269121 DOI: 10.1021/jacs.2c08244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The total syntheses of aflastatin A and its C3-C48 degradation fragment (6a, R = H) have been accomplished. The syntheses feature several complex diastereoselective fragment couplings, including a Felkin-selective trityl-catalyzed Mukaiyama aldol reaction, a chelate-controlled aldol reaction involving soft enolization with magnesium, and an anti-Felkin-selective boron-mediated oxygenated aldol reaction. Careful comparison of the spectroscopic data for the synthetic C3-C48 degradation fragment to that reported by the isolation group revealed a structural misassignment in the lactol region of the naturally derived degradation product. Ultimately, the data reported for the naturally derived aflastatin A C3-C48 degradation lactol (6a, R = H) were attributed to its derivative lactol trideuteriomethyl ether (6c, R = CD3). Additionally, the revised absolute configurations of six stereogenic centers (C8, C9, and C28-C31) were confirmed.
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Affiliation(s)
- David A Evans
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Jason J Beiger
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Jason D Burch
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Peter H Fuller
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Frank Glorius
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Egmont Kattnig
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - David A Thaisrivongs
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - William C Trenkle
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Joseph M Young
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Jing Zhang
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
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4
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Saito F, Trapp N, Bode JW. Iterative Assembly of Polycyclic Saturated Heterocycles from Monomeric Building Blocks. J Am Chem Soc 2019; 141:5544-5554. [PMID: 30845799 DOI: 10.1021/jacs.9b01537] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Polycyclic saturated heterocycles with predictable shapes and structures are assembled by iterative couplings of bifunctional stannyl amine protocol (SnAP) reagents and a single morpholine-forming assembly reaction. Combinations of just a few monomers enable the programmable construction of rotationally restricted, nonplanar heterocyclic arrays with discrete sizes and molecular shapes. The three-dimensional structures of these constrained scaffolds can be quickly and reliably predicted by DFT calculations and the target structures immediately decompiled into the constituent building blocks and assembly sequences. As a demonstration, in silico combinations of the building blocks predict saturated heptacyclic structures with elementary shapes including helices, S-turns and U-turns, which are synthesized in 5-6 steps from the monomers using just three chemical reactions.
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Affiliation(s)
- Fumito Saito
- Laboratorium für Organische Chemie, Department of Chemistry and Applied Biosciences , ETH-Zürich , 8093 Zürich , Switzerland
| | - Nils Trapp
- Laboratorium für Organische Chemie, Department of Chemistry and Applied Biosciences , ETH-Zürich , 8093 Zürich , Switzerland
| | - Jeffrey W Bode
- Laboratorium für Organische Chemie, Department of Chemistry and Applied Biosciences , ETH-Zürich , 8093 Zürich , Switzerland
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5
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Aubert S, Katsina T, Arseniyadis S. A Sequential Pd-AAA/Cross-Metathesis/Cope Rearrangement Strategy for the Stereoselective Synthesis of Chiral Butenolides. Org Lett 2019; 21:2231-2235. [PMID: 30888193 DOI: 10.1021/acs.orglett.9b00521] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A practical and highly enantio- (up to 94:6 er) and diastereoselective (up to >20:1 dr) synthesis of γ-butenolides bearing two adjacent stereogenic centers is reported featuring a sequential direct palladium-catalyzed asymmetric allylic alkylation/( E)-selective cross-metathesis/[3,3]-sigmatropic Cope rearrangement from readily available α-substituted (5 H)-furan-2-ones.
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Affiliation(s)
- Sidonie Aubert
- School of Biological and Chemical Sciences , Queen Mary University of London , Mile End Road , London E1 4NS , U.K
| | - Tania Katsina
- School of Biological and Chemical Sciences , Queen Mary University of London , Mile End Road , London E1 4NS , U.K
| | - Stellios Arseniyadis
- School of Biological and Chemical Sciences , Queen Mary University of London , Mile End Road , London E1 4NS , U.K
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6
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Abstract
Azaspiracid-34 (AZA34) is a recently described structurally unique member of the azaspiracid class of marine neurotoxins. Its novel structure, tentatively assigned on the basis of MS and 1H NMR spectroscopy, is accompanied by a 5.5-fold higher level of toxicity against Jurkat T lymphocytes than AZA1. To completely assign the structure of AZA34 and provide material for in-depth biological evaluation and detection, synthetic access to AZA34 was targeted. This began with the convergent and stereoselective assembly of the C1-C19 domain of AZA34 designed to dovetail with the recent total synthesis approach to AZA3.
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Affiliation(s)
- Antony A Okumu
- Department of Chemistry and Biochemistry , The Ohio State University , Columbus , Ohio 43210 , United States
| | - Craig J Forsyth
- Department of Chemistry and Biochemistry , The Ohio State University , Columbus , Ohio 43210 , United States
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7
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Yasukawa Y, Tsuchikawa H, Todokoro Y, Murata M. Stereoselective Construction of Cisoidal Bisspiroacetal Frameworks through Magnesium Coordination of the Bilateral Acetal Oxygen Atoms. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800074] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yoshifumi Yasukawa
- Department of Chemistry, Graduate School of Science; Osaka University; 1-1 Machikaneyama Toyonaka Osaka 560-0043 Japan
| | - Hiroshi Tsuchikawa
- Department of Chemistry, Graduate School of Science; Osaka University; 1-1 Machikaneyama Toyonaka Osaka 560-0043 Japan
| | - Yasuto Todokoro
- Department of Chemistry, Graduate School of Science; Osaka University; 1-1 Machikaneyama Toyonaka Osaka 560-0043 Japan
| | - Michio Murata
- Department of Chemistry, Graduate School of Science; Osaka University; 1-1 Machikaneyama Toyonaka Osaka 560-0043 Japan
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8
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Desimoni G, Faita G, Quadrelli P. Forty Years after “Heterodiene Syntheses with α,β-Unsaturated Carbonyl Compounds”: Enantioselective Syntheses of 3,4-Dihydropyran Derivatives. Chem Rev 2018; 118:2080-2248. [DOI: 10.1021/acs.chemrev.7b00322] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Giovanni Desimoni
- Department of Chemistry, University of Pavia, Viale Taramelli 10, 27100 Pavia, Italy
| | - Giuseppe Faita
- Department of Chemistry, University of Pavia, Viale Taramelli 10, 27100 Pavia, Italy
| | - Paolo Quadrelli
- Department of Chemistry, University of Pavia, Viale Taramelli 10, 27100 Pavia, Italy
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9
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Kenton NT, Adu‐Ampratwum D, Okumu AA, Zhang Z, Chen Y, Nguyen S, Xu J, Ding Y, McCarron P, Kilcoyne J, Rise F, Wilkins AL, Miles CO, Forsyth CJ. Total Synthesis of (6
R
,10
R
,13
R
,14
R
,16
R
,17
R
,19
S
,20
R
,21
R
,24
S
, 25
S
,28
S
,30
S
,32
R
,33
R
,34
R
,36
S
,37
S
,39
R
)‐Azaspiracid‐3 Reveals Non‐Identity with the Natural Product. Angew Chem Int Ed Engl 2018; 57:805-809. [DOI: 10.1002/anie.201711006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Revised: 11/16/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Nathaniel T. Kenton
- Department of Chemistry and BiochemistryThe Ohio State University 151 W. Woodruff Ave Columbus OH 43210 USA
| | - Daniel Adu‐Ampratwum
- Department of Chemistry and BiochemistryThe Ohio State University 151 W. Woodruff Ave Columbus OH 43210 USA
| | - Antony A. Okumu
- Department of Chemistry and BiochemistryThe Ohio State University 151 W. Woodruff Ave Columbus OH 43210 USA
| | - Zhigao Zhang
- Shanghai Hengrui Pharmaceutical Inc. No. 279 Wenjing Road Shanghai 200245 P. R. China
| | - Yong Chen
- Asymchem Life Science No. 71 7th Ave., TEDA Tianjin 300000 P. R. China
| | - Son Nguyen
- Johnson Matthey Pharma Services 25 Patton Road Devens MA 01434 USA
| | - Jianyan Xu
- Shanghai Hengrui Pharmaceutical Inc. No. 279 Wenjing Road Shanghai 200245 P. R. China
| | - Yue Ding
- Viva Biotech Ltd. 581 Shenkuo Rd., Pudong District Shanghai 201203 China
| | - Pearse McCarron
- Measurement Science and StandardsNational Research Council of Canada Halifax Nova Scotia B3H 3Z1 Canada
| | - Jane Kilcoyne
- Marine Institute, RinvilleOranmore, Co. Galway Ireland
| | - Frode Rise
- Department of ChemistryUniversity of Oslo 0315 Oslo Norway
| | - Alistair L. Wilkins
- Norwegian Veterinary Institute P.O. Box 750 Sentrum 0106 Oslo Norway
- Chemistry DepartmentUniversity of Waikato Private Bag 3105 3240 Hamilton New Zealand
| | - Christopher O. Miles
- Measurement Science and StandardsNational Research Council of Canada Halifax Nova Scotia B3H 3Z1 Canada
- Norwegian Veterinary Institute P.O. Box 750 Sentrum 0106 Oslo Norway
| | - Craig J. Forsyth
- Department of Chemistry and BiochemistryThe Ohio State University 151 W. Woodruff Ave Columbus OH 43210 USA
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10
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Kenton NT, Adu‐Ampratwum D, Okumu AA, Zhang Z, Chen Y, Nguyen S, Xu J, Ding Y, McCarron P, Kilcoyne J, Rise F, Wilkins AL, Miles CO, Forsyth CJ. Total Synthesis of (6
R
,10
R
,13
R
,14
R
,16
R
,17
R
,19
S
,20
R
,21
R
,24
S
, 25
S
,28
S
,30
S
,32
R
,33
R
,34
R
,36
S
,37
S
,39
R
)‐Azaspiracid‐3 Reveals Non‐Identity with the Natural Product. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201711006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Nathaniel T. Kenton
- Department of Chemistry and BiochemistryThe Ohio State University 151 W. Woodruff Ave Columbus OH 43210 USA
| | - Daniel Adu‐Ampratwum
- Department of Chemistry and BiochemistryThe Ohio State University 151 W. Woodruff Ave Columbus OH 43210 USA
| | - Antony A. Okumu
- Department of Chemistry and BiochemistryThe Ohio State University 151 W. Woodruff Ave Columbus OH 43210 USA
| | - Zhigao Zhang
- Shanghai Hengrui Pharmaceutical Inc. No. 279 Wenjing Road Shanghai 200245 P. R. China
| | - Yong Chen
- Asymchem Life Science No. 71 7th Ave., TEDA Tianjin 300000 P. R. China
| | - Son Nguyen
- Johnson Matthey Pharma Services 25 Patton Road Devens MA 01434 USA
| | - Jianyan Xu
- Shanghai Hengrui Pharmaceutical Inc. No. 279 Wenjing Road Shanghai 200245 P. R. China
| | - Yue Ding
- Viva Biotech Ltd. 581 Shenkuo Rd., Pudong District Shanghai 201203 China
| | - Pearse McCarron
- Measurement Science and StandardsNational Research Council of Canada Halifax Nova Scotia B3H 3Z1 Canada
| | - Jane Kilcoyne
- Marine Institute, RinvilleOranmore, Co. Galway Ireland
| | - Frode Rise
- Department of ChemistryUniversity of Oslo 0315 Oslo Norway
| | - Alistair L. Wilkins
- Norwegian Veterinary Institute P.O. Box 750 Sentrum 0106 Oslo Norway
- Chemistry DepartmentUniversity of Waikato Private Bag 3105 3240 Hamilton New Zealand
| | - Christopher O. Miles
- Measurement Science and StandardsNational Research Council of Canada Halifax Nova Scotia B3H 3Z1 Canada
- Norwegian Veterinary Institute P.O. Box 750 Sentrum 0106 Oslo Norway
| | - Craig J. Forsyth
- Department of Chemistry and BiochemistryThe Ohio State University 151 W. Woodruff Ave Columbus OH 43210 USA
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11
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Abstract
γ-Butenolides, γ-butyrolactones, and derivatives, especially in enantiomerically pure form, constitute the structural core of numerous natural products which display an impressive range of biological activities which are important for the development of novel physiological and therapeutic agents. Furthermore, optically active γ-butenolides and γ-butyrolactones serve also as a prominent class of chiral building blocks for the synthesis of diverse biological active compounds and complex molecules. Taking into account the varying biological activity profiles and wide-ranging structural diversity of the optically active γ-butenolide or γ-butyrolactone structure, the development of asymmetric synthetic strategies for assembling such challenging scaffolds has attracted major attention from synthetic chemists in the past decade. This review offers an overview of the different enantioselective synthesis of γ-butenolides and γ-butyrolactones which employ catalytic amounts of metal complexes or organocatalysts, with emphasis focused on the mechanistic issues that account for the observed stereocontrol of the representative reactions, as well as practical applications and synthetic potentials.
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Affiliation(s)
- Bin Mao
- Stratingh Institute for Chemistry, University of Groningen , Nijenborg 4, 9747 AG Groningen, The Netherlands.,National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology , Hangzhou 310014, P. R. China
| | - Martín Fañanás-Mastral
- Stratingh Institute for Chemistry, University of Groningen , Nijenborg 4, 9747 AG Groningen, The Netherlands.,Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela , Jenaro de la Fuente s/n, 15782 Santiago de Compostela, Spain
| | - Ben L Feringa
- Stratingh Institute for Chemistry, University of Groningen , Nijenborg 4, 9747 AG Groningen, The Netherlands
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12
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Hu J, Bian M, Ding H. Recent application of oxa-Michael reaction in complex natural product synthesis. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.11.007] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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13
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Zhang Z, Chen Y, Adu-Ampratwum D, Okumu AA, Kenton NT, Forsyth CJ. Synthesis of the C22–C40 Domain of the Azaspiracids. Org Lett 2016; 18:1824-7. [DOI: 10.1021/acs.orglett.6b00557] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhigao Zhang
- Department
of Chemistry and
Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Yong Chen
- Department
of Chemistry and
Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Daniel Adu-Ampratwum
- Department
of Chemistry and
Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Antony Akura Okumu
- Department
of Chemistry and
Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Nathaniel T. Kenton
- Department
of Chemistry and
Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Craig J. Forsyth
- Department
of Chemistry and
Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
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14
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Yang ZJ, Ge WZ, Li QY, Lu Y, Gong JM, Kuang BJ, Xi X, Wu H, Zhang Q, Chen Y. Syntheses and Biological Evaluation of Costunolide, Parthenolide, and Their Fluorinated Analogues. J Med Chem 2015; 58:7007-20. [PMID: 26226279 DOI: 10.1021/acs.jmedchem.5b00915] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Inspired by the biosynthesis of sesquiterpene lactones (SLs), herein we report the asymmetric total synthesis of the germacrane ring (24). The synthetic strategy features a selective aldol reaction between β,γ-unsaturated chiral sulfonylamide 15a and aldehyde 13, as well as the intramolecular α-alkylation of sulfone 21 to construct a 10-membered carbocylic ring. The key intermediate 24 can be used to prepare the natural products costunolide and parthenolide (PTL), which are the key precursors for transformation into other SLs. Furthermore, the described synthetic sequences are amenable to the total synthesis of SL analogues, such as trifluoromethylated analogues 32 and 45. Analogues 32 and 45 maintained high activities against a series of cancer cell lines compared to their parent PTL and costunolide, respectively. In addition, 32 showed enhanced tolerance to acidic media compared with PTL. To our surprise, PTL and 32 showed comparable half-lives in rat plasma and in the presence of human liver microsomes.
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Affiliation(s)
- Zhong-Jin Yang
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), and Tianjin Key Laboratory of Molecular Drug Research, Nankai University , 94 Weijin Road, Nankai District, Tianjin 300071, People's Republic of China
| | - Wei-Zhi Ge
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), and Tianjin Key Laboratory of Molecular Drug Research, Nankai University , 94 Weijin Road, Nankai District, Tianjin 300071, People's Republic of China
| | - Qiu-Ying Li
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), and Tianjin Key Laboratory of Molecular Drug Research, Nankai University , 94 Weijin Road, Nankai District, Tianjin 300071, People's Republic of China
| | - Yaxin Lu
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), and Tianjin Key Laboratory of Molecular Drug Research, Nankai University , 94 Weijin Road, Nankai District, Tianjin 300071, People's Republic of China
| | - Jian-Miao Gong
- Accendatech Company, Ltd. , Tianjin 300384, People's Republic of China
| | - Bei-Jia Kuang
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), and Tianjin Key Laboratory of Molecular Drug Research, Nankai University , 94 Weijin Road, Nankai District, Tianjin 300071, People's Republic of China
| | - Xiaonan Xi
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), and Tianjin Key Laboratory of Molecular Drug Research, Nankai University , 94 Weijin Road, Nankai District, Tianjin 300071, People's Republic of China.,Tianjin International Joint Academy of Biomedicine , Tianjin 300457, People's Republic of China
| | - Haiting Wu
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), and Tianjin Key Laboratory of Molecular Drug Research, Nankai University , 94 Weijin Road, Nankai District, Tianjin 300071, People's Republic of China.,Tianjin International Joint Academy of Biomedicine , Tianjin 300457, People's Republic of China
| | - Quan Zhang
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), and Tianjin Key Laboratory of Molecular Drug Research, Nankai University , 94 Weijin Road, Nankai District, Tianjin 300071, People's Republic of China
| | - Yue Chen
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), and Tianjin Key Laboratory of Molecular Drug Research, Nankai University , 94 Weijin Road, Nankai District, Tianjin 300071, People's Republic of China
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15
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Eftekhari-Sis B, Zirak M. Chemistry of α-oxoesters: a powerful tool for the synthesis of heterocycles. Chem Rev 2014; 115:151-264. [PMID: 25423283 DOI: 10.1021/cr5004216] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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16
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Triantafyllakis M, Tofi M, Montagnon T, Kouridaki A, Vassilikogiannakis G. Singlet Oxygen-Mediated Synthesis of Bis-spiroketals Found in Azaspiracids. Org Lett 2014; 16:3150-3. [DOI: 10.1021/ol501301w] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Myron Triantafyllakis
- Department of Chemistry, University of Crete, Vasilika Vouton, 71003 Iraklion, Crete, Greece
| | - Maria Tofi
- Department of Chemistry, University of Crete, Vasilika Vouton, 71003 Iraklion, Crete, Greece
| | - Tamsyn Montagnon
- Department of Chemistry, University of Crete, Vasilika Vouton, 71003 Iraklion, Crete, Greece
| | - Antonia Kouridaki
- Department of Chemistry, University of Crete, Vasilika Vouton, 71003 Iraklion, Crete, Greece
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17
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Abstract
Abstract
The synthesis of urea in 1828 set in motion the discipline of organic synthesis in general and of total synthesis in particular, the art and science of synthesizing natural products, the molecules of living nature. Early endeavors in total synthesis had as their main objective the proof of structure of the target molecule. Later on, the primary goal became the demonstration of the power of synthesis to construct complex molecules through appropriately devised strategies, making the endeavor an achievement whose value was measured by its elegance and efficiency. While these objectives continue to be important, contemporary endeavors in total synthesis are increasingly focused on practical aspects, including method development, efficiency, and biological and medical relevance. In this article, the emergence and evolution of total synthesis to its present state is traced, selected total syntheses from the author's laboratories are highlighted, and projections for the future of the field are discussed.
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18
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Roiban GD, Ilie A, Reetz MT. The Chelation-controlled Mukaiyama Aldol Reaction of Chiral α- and β-Alkoxy Aldehydes. CHEM LETT 2014. [DOI: 10.1246/cl.130920] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Gheorghe-Doru Roiban
- Department of Chemistry, Philipps-Universität Marburg
- Max-Planck-Institut für Kohlenforschung
| | - Adriana Ilie
- Department of Chemistry, Philipps-Universität Marburg
- Max-Planck-Institut für Kohlenforschung
| | - Manfred T. Reetz
- Department of Chemistry, Philipps-Universität Marburg
- Max-Planck-Institut für Kohlenforschung
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19
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Kan SBJ, Ng KK, Paterson I. Die Bedeutung der Mukaiyama‐Aldolreaktion für die Totalsynthese. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201303914] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- S. B. Jennifer Kan
- Laboratory of Synthetic Organic Chemistry and Special Laboratory of Organocatalytic Chemistry, Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606‐8502 (Japan)
| | - Kenneth K.‐H. Ng
- University Chemical Laboratory, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW (Großbritannien) http://www‐paterson.ch.cam.ac.uk
| | - Ian Paterson
- University Chemical Laboratory, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW (Großbritannien) http://www‐paterson.ch.cam.ac.uk
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Kan SBJ, Ng KKH, Paterson I. The impact of the Mukaiyama aldol reaction in total synthesis. Angew Chem Int Ed Engl 2013; 52:9097-108. [PMID: 23893491 DOI: 10.1002/anie.201303914] [Citation(s) in RCA: 142] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Indexed: 01/20/2023]
Abstract
Four decades since Mukaiyama's first reports on the successful application of silicon and boron enolates in directed aldol reactions, the ability of this highly controlled carbon-carbon bond-forming method to simultaneously define stereochemistry, introduce complexity, and construct the carbon skeleton with a characteristic 1,3-oxygenation pattern has made it a powerful tool for natural product synthesis. This Minireview highlights a number of representative total syntheses that demonstrate the impact of the Mukaiyama aldol reaction and discusses the underlying mechanistic rationale that determines the stereochemical outcomes.
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Affiliation(s)
- S B Jennifer Kan
- Laboratory of Synthetic Organic Chemistry, Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
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21
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Zhang Z, Ding Y, Xu J, Chen Y, Forsyth CJ. Synthesis of the C1–C21 Domain of Azaspiracids-1 and −3. Org Lett 2013; 15:2338-41. [DOI: 10.1021/ol400487e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Zhigao Zhang
- Department of Chemistry & Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Yue Ding
- Department of Chemistry & Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Jianyan Xu
- Department of Chemistry & Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Yong Chen
- Department of Chemistry & Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Craig J. Forsyth
- Department of Chemistry & Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
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22
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Nicolaou KC, Hale CRH, Nilewski C, Ioannidou HA. Constructing molecular complexity and diversity: total synthesis of natural products of biological and medicinal importance. Chem Soc Rev 2012; 41:5185-238. [PMID: 22743704 PMCID: PMC3426871 DOI: 10.1039/c2cs35116a] [Citation(s) in RCA: 159] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The advent of organic synthesis and the understanding of the molecule as they occurred in the nineteenth century and were refined in the twentieth century constitute two of the most profound scientific developments of all time. These discoveries set in motion a revolution that shaped the landscape of the molecular sciences and changed the world. Organic synthesis played a major role in this revolution through its ability to construct the molecules of the living world and others like them whose primary element is carbon. Although the early beginnings of organic synthesis came about serendipitously, organic chemists quickly recognized its potential and moved decisively to advance and exploit it in myriad ways for the benefit of mankind. Indeed, from the early days of the synthesis of urea and the construction of the first carbon-carbon bond, the art of organic synthesis improved to impressively high levels of sophistication. Through its practice, today chemists can synthesize organic molecules--natural and designed--of all types of structural motifs and for all intents and purposes. The endeavor of constructing natural products--the organic molecules of nature--is justly called both a creative art and an exact science. Often called simply total synthesis, the replication of nature's molecules in the laboratory reflects and symbolizes the state of the art of synthesis in general. In the last few decades a surge in total synthesis endeavors around the world led to a remarkable collection of achievements that covers a wide ranging landscape of molecular complexity and diversity. In this article, we present highlights of some of our contributions in the field of total synthesis of natural products of biological and medicinal importance. For perspective, we also provide a listing of selected examples of additional natural products synthesized in other laboratories around the world over the last few years.
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Affiliation(s)
- K C Nicolaou
- Department of Chemistry and Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA
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23
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Welch Award: D. A. Evans ausgezeichnet / Hackerman Award: O. Ozerov / Wöhler Prize: Paul T. Anastas. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/anie.201204613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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24
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Welch Award: D. A. Evans ausgezeichnet / Hackerman Award: O. Ozerov / Wöhler-Preis: Paul T. Anastas. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201204613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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25
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Affiliation(s)
- Gerrit Symkenberg
- Institut für Organische Chemie and Centre of Biomolecular Drug Research (BMWZ), Leibniz Universität Hannover, Schneiderberg 1B, 30167 Hannover, Germany
| | - Markus Kalesse
- Institut für Organische Chemie and Centre of Biomolecular Drug Research (BMWZ), Leibniz Universität Hannover, Schneiderberg 1B, 30167 Hannover, Germany
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26
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Sun Y, Gan J, Fan R. Facile Construction of Oxa-Aza Spirobicycles via a Tandem Carbon-Hydrogen Bond Oxidation. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201100196] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Casiraghi G, Battistini L, Curti C, Rassu G, Zanardi F. The Vinylogous Aldol and Related Addition Reactions: Ten Years of Progress. Chem Rev 2011; 111:3076-154. [DOI: 10.1021/cr100304n] [Citation(s) in RCA: 454] [Impact Index Per Article: 34.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Giovanni Casiraghi
- Dipartimento Farmaceutico, Università degli Studi di Parma, Viale G. P. Usberti 27A, I-43124 Parma, Italy
| | - Lucia Battistini
- Dipartimento Farmaceutico, Università degli Studi di Parma, Viale G. P. Usberti 27A, I-43124 Parma, Italy
| | - Claudio Curti
- Dipartimento Farmaceutico, Università degli Studi di Parma, Viale G. P. Usberti 27A, I-43124 Parma, Italy
| | - Gloria Rassu
- Istituto di Chimica Biomolecolare del CNR, Traversa La Crucca 3, I-07100 Li Punti, Sassari, Italy
| | - Franca Zanardi
- Dipartimento Farmaceutico, Università degli Studi di Parma, Viale G. P. Usberti 27A, I-43124 Parma, Italy
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Cohen DT, Cardinal-David B, Scheidt KA. Lewis acid activated synthesis of highly substituted cyclopentanes by the N-heterocyclic carbene catalyzed addition of homoenolate equivalents to unsaturated ketoesters. Angew Chem Int Ed Engl 2011; 50:1678-82. [PMID: 21308931 PMCID: PMC3275665 DOI: 10.1002/anie.201005908] [Citation(s) in RCA: 155] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2010] [Revised: 12/02/2010] [Indexed: 11/11/2022]
Affiliation(s)
- Daniel T Cohen
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Chemistry of Life Processes Institute, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA
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29
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Cohen DT, Cardinal-David B, Scheidt KA. Lewis Acid Activated Synthesis of Highly Substituted Cyclopentanes by the N-Heterocyclic Carbene Catalyzed Addition of Homoenolate Equivalents to Unsaturated Ketoesters. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201005908] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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30
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Organocatalytic approach to 3,5,6-trisubstituted and 4,6-disubstituted tetrahydropyran-2-ones. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.05.077] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Gao S, Wang Q, Huang LJS, Lum L, Chen C. Chemical and biological studies of nakiterpiosin and nakiterpiosinone. J Am Chem Soc 2010; 132:371-83. [PMID: 20000429 DOI: 10.1021/ja908626k] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Nakiterpiosin and nakiterpiosinone are two related C-nor-D-homosteroids isolated from the sponge Terpios hoshinota that show promise as anticancer agents. We have previously described the asymmetric synthesis and revision of the relative configuration of nakiterpiosin. We now provide detailed information on the stereochemical analysis that supports our structure revision and the synthesis of the originally proposed and revised nakiterpiosin. In addition, we herein describe a refined approach for the synthesis of nakiterpiosin, the first synthesis of nakiterpiosinone, and preliminary mechanistic studies of nakiterpiosin's action in mammalian cells. Cells treated with nakiterpiosin exhibit compromised formation of the primary cilium, an organelle that functions as an assembly point for components of the Hedgehog signal transduction pathway. We provide evidence that the biological effects exhibited by nakiterpiosin are mechanistically distinct from those of well-established antimitotic agents such as taxol. Nakiterpiosin may be useful as an anticancer agent in those tumors resistant to existing antimitotic agents and those dependent on Hedgehog pathway responses for growth.
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Affiliation(s)
- Shuanhu Gao
- Department of Biochemistry, The University of Texas Southwestern Medical Center at Dallas, 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, USA
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Tony KA, Dabideen D, Li J, Díaz-Hernández MD, Jiménez-Barbero J, Mootoo DR. Olefin metathesis-iodoetherification-dehydroiodination strategy for spiroketal subunits of polyether antibiotics. J Org Chem 2009; 74:7774-80. [PMID: 19813766 PMCID: PMC3395214 DOI: 10.1021/jo9014722] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The convergent synthesis of two pentacyclic analogues of the polyether monensin A is described. Although different with respect to the configuration of the alcohol at the 3 position of the six-membered ring of the spiroketal subunit, the configuration at the acetal center in both structures is unchanged and is consistent with the anomeric effect. The key synthetic steps are the coupling of two complex segments via an olefin metathesis, and the subsequent conversion of a dihydroxyalkene to the spiroketal through an iodoetherification-dehydroiodination sequence. The compatibility of these transformations with a variety of functional groups makes the overall strategy appropriate for highly substituted frameworks.
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Affiliation(s)
- Kurissery A. Tony
- Department of Chemistry, Hunter College/CUNY, 695 Park Avenue, New York, NY 10021
| | - Darrin Dabideen
- Department of Chemistry, Hunter College/CUNY, 695 Park Avenue, New York, NY 10021
| | - Jialiang Li
- Department of Chemistry, Hunter College/CUNY, 695 Park Avenue, New York, NY 10021
| | | | | | - David R. Mootoo
- Department of Chemistry, Hunter College/CUNY, 695 Park Avenue, New York, NY 10021
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34
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Synthesis of oxa-aza spirobicycles by intramolecular hydrogen atom transfer promoted by N-radicals in carbohydrate systems. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.05.049] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Abstract
This manuscript describes a convergent synthesis and the revision of the relative stereochemistry of nakiterpiosin, a marine C-nor-D-homosteroid. Our synthesis features a late-stage carbonylative Stille cross-coupling reaction and a photo-Nazarov cyclization reaction that deliver the complete nakiterpiosin skeleton efficiently.
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Affiliation(s)
- Shuanhu Gao
- Department of Biochemistry, The University of Texas Southwestern Medical Center at Dallas, 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, USA
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Abstract
An overview of marine natural products synthesis during 2007 is provided. As with earlier installments in this series, the emphasis is on total syntheses of molecules of contemporary interest, new total syntheses, and syntheses that have resulted in structure confirmation or stereochemical assignments.1 Introduction, 2 Review articles, 3 Azaspiracid, 4 Polyethers, 5 Guanidinium alkaloids, 6 Amphidinolides, 7 Total syntheses of other compounds, 8 Acknowledgements, 9 References.
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Affiliation(s)
- Jonathan C Morris
- School of Chemistry and Physics, University of Adelaide, Adelaide, Australia5005
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37
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Evans DA, Kvaernø L, Dunn TB, Beauchemin A, Raymer B, Mulder JA, Olhava EJ, Juhl M, Kagechika K, Favor DA. Total synthesis of (+)-azaspiracid-1. An exhibition of the intricacies of complex molecule synthesis. J Am Chem Soc 2008; 130:16295-309. [PMID: 19006391 PMCID: PMC3408805 DOI: 10.1021/ja804659n] [Citation(s) in RCA: 84] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis of the marine neurotoxin azaspiracid-1 has been accomplished. The individual fragments were synthesized by catalytic enantioselective processes: A hetero-Diels-Alder reaction to afford the E- and HI-ring fragments, a carbonyl-ene reaction to furnish the CD-ring fragment, and a Mukaiyama aldol reaction to deliver the FG-ring fragment. The subsequent fragment couplings were accomplished by aldol and sulfone anion methodologies. All ketalization events to form the nonacyclic target were accomplished under equilibrating conditions utilizing the imbedded configurations of the molecule to adopt one favored conformation. A final fragment coupling of the anomeric EFGHI-sulfone anion to the ABCD-aldehyde completed the convergent synthesis of (+)-azaspiracid-1.
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Affiliation(s)
- David A Evans
- Department of Chemistry & Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA.
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38
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Nicolaou KC, Chen JS, Dalby SM. From nature to the laboratory and into the clinic. Bioorg Med Chem 2008; 17:2290-303. [PMID: 19028103 DOI: 10.1016/j.bmc.2008.10.089] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2008] [Accepted: 10/31/2008] [Indexed: 01/17/2023]
Abstract
Natural products possess a broad diversity of structure and function, and they provide inspiration for chemistry, biology, and medicine. In this review article, we highlight and place in context our laboratory's total syntheses of, and related studies on, complex secondary metabolites that were clinically important drugs, or have since been developed into useful medicines, namely amphotericin B (1), calicheamicin gamma(1)(I) (2), rapamycin (3), Taxol (4), the epothilones [e.g., epothilones A (5) and B (6)], and vancomycin (7). We also briefly highlight our research with other selected inspirational natural products possessing interesting biological activities [i.e., dynemicin A (8), uncialamycin (9), eleutherobin (10), sarcodictyin A (11), azaspiracid-1 (12), thiostrepton (13), abyssomicin C (14), platensimycin (15), platencin (16), and palmerolide A (17)].
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Affiliation(s)
- K C Nicolaou
- Department of Chemistry and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, BCC408, La Jolla, CA 92037, USA.
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Li J, Li X, Mootoo DR. Synthetic and Computational Studies on the ABC Trioxadispiroketal Subunit of the Marine Biotoxin Azaspiracid-1. Nat Prod Commun 2008. [DOI: 10.1177/1934578x0800301106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The trioxadispiroketal residue in the marine biotoxin azaspiracid-1, which exists in a configuration capable of exhibiting a double anomeric effect, is believed to be the thermodynamically most stable bis-spiroketal diastereomer. In order to get insight into how structural factors affect this equilibrium, a simplified ABC trioxadispiroketal analog of azaspiracid-1 was synthesized and subjected to equilbration and computational studies. Compound 7, which represents a double anomeric effect was obtained as the major isomer, together with diastereomers 14 and 15, in a respective ratio of 62:22:16. DFT calculations for 7, 14 and 15 qualitatively matched this observation. These results suggest that while a double anomeric effect may play a major role in the stability of the trioxadispiroketal configuration in the more complex natural product, the substitution pattern of the C ring is also a contributing factor.
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Affiliation(s)
- Jialiang Li
- Department of Chemistry, Hunter College/CUNY, New York, NY 10021, USA
| | - Xiaohua Li
- Department of Chemistry, Hunter College/CUNY, New York, NY 10021, USA
| | - David R. Mootoo
- Department of Chemistry, Hunter College/CUNY, New York, NY 10021, USA
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40
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Affiliation(s)
- Sébastien Reymond
- Laboratoire de Chimie Organique,
ESPCI ParisTech, CNRS, 10 Rue
Vauquelin, 75231 Paris Cedex 05, France
| | - Janine Cossy
- Laboratoire de Chimie Organique,
ESPCI ParisTech, CNRS, 10 Rue
Vauquelin, 75231 Paris Cedex 05, France
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41
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Boukouvalas J, Loach RP. General, regiodefined access to alpha-substituted butenolides through metal-halogen exchange of 3-bromo-2-silyloxyfurans. Efficient synthesis of an anti-inflammatory gorgonian lipid. J Org Chem 2008; 73:8109-12. [PMID: 18798671 DOI: 10.1021/jo8015924] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A variety of alpha-substituted butenolides were efficiently prepared from 3-bromo-2-triisopropylsilyloxyfuran via lithium-bromine exchange and in situ quench with carbon or heteroatom electrophiles. The inherent flexibility of this methodology is illustrated by a short and efficient synthesis of an anti-inflammatory marine natural product.
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Affiliation(s)
- John Boukouvalas
- Département de Chimie, Université Laval, Quebec City, Quebec G1K 7P4, Canada.
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42
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Affiliation(s)
- Marie‐Eve Sinibaldi
- Laboratoire de Synthèse et Etude de Systèmes à Intérêt Biologique (SEESIB), UMR 6504, Université Blaise Pascal, 63177 Aubière Cedex, France, Fax: +33‐4‐73407717
| | - Isabelle Canet
- Laboratoire de Synthèse et Etude de Systèmes à Intérêt Biologique (SEESIB), UMR 6504, Université Blaise Pascal, 63177 Aubière Cedex, France, Fax: +33‐4‐73407717
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Tony KA, Li X, Dabideen D, Li J, Mootoo DR. An iodoetherification-dehydroiodination strategy for the synthesis of complex spiroketals from dihydroxyalkene precursors. Org Biomol Chem 2008; 6:1165-9. [PMID: 18362952 PMCID: PMC3395191 DOI: 10.1039/b719247a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dihydroxyalkenes or their monoprotected alcohol derivatives are transformed to 5,5- and 5,6-spiroketals through a sequence involving an initial iodocyclization, followed by a silver triflate mediated spiroketalization step on the derived hydroxy-iodoether.
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Affiliation(s)
- K. A. Tony
- Department of Chemistry, Hunter College/CUNY, New York, NY, 10021, USA. ; Fax: +1 212-772-5332; Tel: +1 212-772-4356
| | - Xiaohua Li
- Department of Chemistry, Hunter College/CUNY, New York, NY, 10021, USA. ; Fax: +1 212-772-5332; Tel: +1 212-772-4356
| | - Darrin Dabideen
- Department of Chemistry, Hunter College/CUNY, New York, NY, 10021, USA. ; Fax: +1 212-772-5332; Tel: +1 212-772-4356
| | - Jialiang Li
- Department of Chemistry, Hunter College/CUNY, New York, NY, 10021, USA. ; Fax: +1 212-772-5332; Tel: +1 212-772-4356
| | - David R. Mootoo
- Department of Chemistry, Hunter College/CUNY, New York, NY, 10021, USA. ; Fax: +1 212-772-5332; Tel: +1 212-772-4356
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44
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Evans D, Kværnø L, Mulder J, Raymer B, Dunn T, Beauchemin A, Olhava E, Juhl M, Kagechika K. Total Synthesis of (+)-Azaspiracid-1. Part I: Synthesis of the Fully Elaborated ABCD Aldehyde. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200701515] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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45
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Evans DA, Kvaernø L, Mulder JA, Raymer B, Dunn TB, Beauchemin A, Olhava EJ, Juhl M, Kagechika K. Total Synthesis of (+)-Azaspiracid-1. Part I: Synthesis of the Fully Elaborated ABCD Aldehyde. Angew Chem Int Ed Engl 2007; 46:4693-7. [PMID: 17546577 DOI: 10.1002/anie.200701515] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- David A Evans
- Department of Chemistry & Chemical Biology, Harvard University, Cambridge, MA 02138, USA.
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