1
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Han J, Bernhardt PV, Capon RJ. Goondansamycins A-H: Benzenoid Ansamycins from an Australian Volcanic Crater Soil-Derived Actinomadura sp. S4S-00069B08. JOURNAL OF NATURAL PRODUCTS 2024; 87:1471-1478. [PMID: 38747559 DOI: 10.1021/acs.jnatprod.4c00336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
A chemical investigation of Australian soil-derived bacteria Actinomadura sp. S4S-00069B08 yielded eight new benzenoid ansamycins, goondansamycins A-H. Goondansamycins feature rare 1,4-benzoxazin-3-one or o-diamino-p-benzoquinone moieties and can exist as both aglycones or 9-O-α-glycosides of either d-rhodinose or d-amicetose. Structures were solved on the basis of detailed spectroscopy, including X-ray analysis.
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Affiliation(s)
- Jianying Han
- Institute for Molecular Bioscience, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Paul V Bernhardt
- School of Chemistry and Molecular Bioscience, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Robert J Capon
- Institute for Molecular Bioscience, The University of Queensland, St Lucia, Queensland 4072, Australia
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2
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Shi P, Wang Y, Liu M, Li Y, Zhu J, Shen Y, Wang H. Discovery and Heterologous Production of Tetrapetalones Provide Insights into the Formation of the Tetracyclic System. JOURNAL OF NATURAL PRODUCTS 2024; 87:98-103. [PMID: 38170464 DOI: 10.1021/acs.jnatprod.3c00813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Tetrapetalones make up a unique class of pentaketide ansamycins that feature a tetracyclic skeleton and exhibit potent inhibitory activities against soybean lipoxygenase. However, a detailed biosynthetic route to tetrapetalones has not been published. Herein we report the activation of the tetrapetalones' biosynthetic gene cluster (tpt) in Streptomyces sp. S10 by promoter engineering along with constitutive expression of pathway-specific regulator genes, leading to the discovery of seven new derivatives, tetrapetalones E-K (2-8), and the known tetrapetalone A (1). In vivo gene deletion experiments and heterologous expression of the minimized tpt cluster in Streptomyces albus J1074 suggest that the tetracyclic system of tetrapetalones is probably formed spontaneously, and the regioselective glycosylation of tetrapetalones at the C-9 hydroxy group with d-rhamnose or d-rhodinose was catalyzed by the glycosyltransferase Tpt14.
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Affiliation(s)
- Peng Shi
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, People's Republic of China
| | - Yu Wang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, People's Republic of China
| | - Mengyujie Liu
- Key Laboratory of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, People's Republic of China
| | - Yaoyao Li
- Key Laboratory of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, People's Republic of China
| | - Jing Zhu
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, People's Republic of China
| | - Yuemao Shen
- Key Laboratory of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, People's Republic of China
| | - Haoxin Wang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, People's Republic of China
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3
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Yang H, Zhang Y, Chen W, Shi H, Huo L, Li J, Li H, Xie X, She X. Scalable Total Syntheses of (±)-Catellatolactams A and B. Org Lett 2023; 25:1003-1007. [PMID: 36748956 DOI: 10.1021/acs.orglett.3c00132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The first total syntheses of (±)-catellatolactams A and B, two novel ansamacrolactams, are described in 5 and 8 steps, respectively. The strategy relies on an amidation reaction to couple the acylated Meldrum's acid and an aryl amine, a regioselective C-H insertion to construct the γ-lactam moiety, and an RCM reaction to forge the macrocycles with E-olefin. This concise and scalable synthesis provided over 200 mg of the target molecules.
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Affiliation(s)
- Hesi Yang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000 Gansu, P. R. China
| | - Yan Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000 Gansu, P. R. China
| | - Wei Chen
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000 Gansu, P. R. China
| | - Hongliang Shi
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000 Gansu, P. R. China
| | - Liang Huo
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000 Gansu, P. R. China
| | - Jia Li
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000 Gansu, P. R. China
| | - Huilin Li
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000 Gansu, P. R. China
| | - Xingang Xie
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000 Gansu, P. R. China
| | - Xuegong She
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000 Gansu, P. R. China
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4
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Heravi MM, Nazari A. Samarium(ii) iodide-mediated reactions applied to natural product total synthesis. RSC Adv 2022; 12:9944-9994. [PMID: 35424959 PMCID: PMC8965710 DOI: 10.1039/d1ra08163b] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Accepted: 03/12/2022] [Indexed: 12/22/2022] Open
Abstract
Natural product synthesis remains a field in which new synthetic methods and reagents are continually being evaluated. Due to the demanding structures and complex functionality of many natural products, only powerful and selective methods and reagents will be highlighted in this proceeding. Since its introduction by Henri Kagan, samarium(ii) iodide (SmI2, Kagan's reagent) has found increasing use in chemical synthesis. Over the years, many reviews have been published on the application of SmI2 in numerous reductive coupling procedures as well as in natural product total synthesis. This review highlights recent advances in SmI2-mediated synthetic strategies, as applied in the total synthesis of natural products since 2004.
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Affiliation(s)
- Majid M Heravi
- Department of Chemistry, School of Science, Alzahra University PO Box 1993891176 Vanak Tehran Iran +98 21 88041344 +98 21 88044051
| | - Azadeh Nazari
- Department of Chemistry, School of Science, Alzahra University PO Box 1993891176 Vanak Tehran Iran +98 21 88041344 +98 21 88044051
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5
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Saeed S, Zahoor AF, Ahmad S, Akhtar R, Sikandar S. Reformatsky reaction as a key step in the synthesis of natural products: A review. SYNTHETIC COMMUN 2021. [DOI: 10.1080/00397911.2021.2008447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Sadaf Saeed
- Department of Chemistry, Government College University Faisalabad, Faisalabad, Pakistan
| | - Ameer Fawad Zahoor
- Department of Chemistry, Government College University Faisalabad, Faisalabad, Pakistan
| | - Sajjad Ahmad
- Department of Chemistry, University of Engineering and Technology Lahore, Faisalabad, Pakistan
| | - Rabia Akhtar
- Department of Chemistry, Government College University Faisalabad, Faisalabad, Pakistan
| | - Sana Sikandar
- Department of Chemistry, Government College University Faisalabad, Faisalabad, Pakistan
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6
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Curti C, Battistini L, Sartori A, Zanardi F. New Developments of the Principle of Vinylogy as Applied to π-Extended Enolate-Type Donor Systems. Chem Rev 2020; 120:2448-2612. [PMID: 32040305 PMCID: PMC7993750 DOI: 10.1021/acs.chemrev.9b00481] [Citation(s) in RCA: 102] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Indexed: 12/19/2022]
Abstract
The principle of vinylogy states that the electronic effects of a functional group in a molecule are possibly transmitted to a distal position through interposed conjugated multiple bonds. As an emblematic case, the nucleophilic character of a π-extended enolate-type chain system may be relayed from the legitimate α-site to the vinylogous γ, ε, ..., ω remote carbon sites along the chain, provided that suitable HOMO-raising strategies are adopted to transform the unsaturated pronucleophilic precursors into the reactive polyenolate species. On the other hand, when "unnatural" carbonyl ipso-sites are activated as nucleophiles (umpolung), vinylogation extends the nucleophilic character to "unnatural" β, δ, ... remote sites. Merging the principle of vinylogy with activation modalities and concepts such as iminium ion/enamine organocatalysis, NHC-organocatalysis, cooperative organo/metal catalysis, bifunctional organocatalysis, dicyanoalkylidene activation, and organocascade reactions represents an impressive step forward for all vinylogous transformations. This review article celebrates this evolutionary progress, by collecting, comparing, and critically describing the achievements made over the nine year period 2010-2018, in the generation of vinylogous enolate-type donor substrates and their use in chemical synthesis.
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Affiliation(s)
| | | | | | - Franca Zanardi
- Dipartimento di Scienze degli
Alimenti e del Farmaco, Università
di Parma, Parco Area delle Scienze 27A, 43124 Parma, Italy
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7
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Zheng K, Hong R. Stereoconfining macrocyclizations in the total synthesis of natural products. Nat Prod Rep 2019; 36:1546-1575. [DOI: 10.1039/c8np00094h] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
This review covers selected examples of point chirality-forming macrocyclizations in natural product total synthesis in the past three decades.
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Affiliation(s)
- Kuan Zheng
- Key Laboratory of Synthetic Chemistry of Natural Substances
- Center for Excellence in Molecular Synthesis
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
| | - Ran Hong
- Key Laboratory of Synthetic Chemistry of Natural Substances
- Center for Excellence in Molecular Synthesis
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
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8
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Pellissier H. Recent developments in the asymmetric Reformatsky-type reaction. Beilstein J Org Chem 2018; 14:325-344. [PMID: 29507638 PMCID: PMC5815279 DOI: 10.3762/bjoc.14.21] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 01/22/2018] [Indexed: 01/03/2023] Open
Abstract
This review collects the most important developments in asymmetric Reformatsky-type reactions published since the beginning of 2013, including both diastereoselective methodologies based on the use of chiral substrates and enantioselective catalytic procedures.
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Affiliation(s)
- Hélène Pellissier
- Aix-Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France
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9
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Abstract
The first total synthesis of the methyl-protected (±)-chlorizidine A has been achieved in 10 steps. Pd-catalyzed decarboxylative coupling and late-stage oxidation were utilized to construct the 5H-pyrrolo[2,1-a]isoindol-5-one scaffold. Samarium(II) iodide mediated Reformatsky reaction and intramolecular Mitsunobu reactions were efficiently applied for the synthesis of the 2,3-dihydropyrrolizine ring system. Chlorizidine A is highly prone to degradation; hence, methyl-protected (±)-chlorizidine A was prepared.
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Affiliation(s)
- Jyoti P Mahajan
- Division of Organic Chemistry, CSIR-National Chemical Laboratory , Pune 411 008, India
| | - Santosh B Mhaske
- Division of Organic Chemistry, CSIR-National Chemical Laboratory , Pune 411 008, India
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10
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Yang S, Xi Y, Chen J, Yang Z. Mechanistic Study of SmI2-Mediated Reformatsky Reaction for Macrolactam Formation Using a Cyclopropyl Group as a Probe. Isr J Chem 2016. [DOI: 10.1002/ijch.201600104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Shouliang Yang
- Key Laboratory of Bio-organic Chemistry and Molecular Engineering of the Ministry of Education and; Beijing National Laboratory for Molecular Science (BNLMS); College of Chemistry and Molecular Engineering and; Peking-Tsinghua Center for Life Sciences; Peking University; Beijing 100871 P. R. China
| | - Yumeng Xi
- Key Laboratory of Bio-organic Chemistry and Molecular Engineering of the Ministry of Education and; Beijing National Laboratory for Molecular Science (BNLMS); College of Chemistry and Molecular Engineering and; Peking-Tsinghua Center for Life Sciences; Peking University; Beijing 100871 P. R. China
| | - Jiahua Chen
- Key Laboratory of Bio-organic Chemistry and Molecular Engineering of the Ministry of Education and; Beijing National Laboratory for Molecular Science (BNLMS); College of Chemistry and Molecular Engineering and; Peking-Tsinghua Center for Life Sciences; Peking University; Beijing 100871 P. R. China
| | - Zhen Yang
- Key Laboratory of Bio-organic Chemistry and Molecular Engineering of the Ministry of Education and; Beijing National Laboratory for Molecular Science (BNLMS); College of Chemistry and Molecular Engineering and; Peking-Tsinghua Center for Life Sciences; Peking University; Beijing 100871 P. R. China
- Laboratory of Chemical Genomics; School of Chemical Biology and Biotechnology; Peking University; Shenzhen Graduate School; Shenzhen 518055 P. R. China
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11
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Loh J, Asad N, Samarakoon TB, Hanson PR. Modular, One-Pot, Sequential Aziridine Ring Opening-S(N)Ar Strategy to 7-, 10-, and 11-Membered Benzo-Fused Sultams. J Org Chem 2015; 80:9926-41. [PMID: 26446396 PMCID: PMC4943336 DOI: 10.1021/acs.joc.5b01429] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Indexed: 12/12/2022]
Abstract
The generation of common and stereochemically rich medium-sized benzo-fused sultams via complementary pairing of heretofore-unknown (o-fluoroaryl)sulfonyl aziridine building blocks with an array of amino alcohols/amines in a modular one-pot, sequential protocol using an aziridine ring opening and intramolecular nucleophilic aromatic substitution is reported. The strategy employs a variety of amino alcohols/amines and proceeds with 6 + 4/6 + 5 and 6 + 1 cycloetherification pathways in a highly chemo- and regioselective fashion to obtain skeletally and structurally diverse, polycyclic, 10- to 11- and 7-membered benzo-fused sultams for broad-scale screening.
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Affiliation(s)
- Joanna
K. Loh
- Department of Chemistry, University
of Kansas, 1251 Wescoe
Hall Drive, Lawrence, Kansas 66045, United
States
- Center
for Chemical Methodologies
and Library Development (KU-CMLD), Delbert M. Shankel Structural Biology
Center, The University of Kansas, 2034 Becker Drive, Lawrence, Kansas 66047, United States
| | - Naeem Asad
- Department of Chemistry, University
of Kansas, 1251 Wescoe
Hall Drive, Lawrence, Kansas 66045, United
States
- Center
for Chemical Methodologies
and Library Development (KU-CMLD), Delbert M. Shankel Structural Biology
Center, The University of Kansas, 2034 Becker Drive, Lawrence, Kansas 66047, United States
| | - Thiwanka B. Samarakoon
- Department of Chemistry, University
of Kansas, 1251 Wescoe
Hall Drive, Lawrence, Kansas 66045, United
States
- Center
for Chemical Methodologies
and Library Development (KU-CMLD), Delbert M. Shankel Structural Biology
Center, The University of Kansas, 2034 Becker Drive, Lawrence, Kansas 66047, United States
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12
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Szostak M, Fazakerley NJ, Parmar D, Procter DJ. Cross-Coupling Reactions Using Samarium(II) Iodide. Chem Rev 2014; 114:5959-6039. [DOI: 10.1021/cr400685r] [Citation(s) in RCA: 290] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Michal Szostak
- School
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Neal J. Fazakerley
- School
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Dixit Parmar
- School
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - David J. Procter
- School
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
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13
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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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14
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15
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Peng B, Geerdink D, Maulide N. Electrophilic rearrangements of chiral amides: a traceless asymmetric α-allylation. J Am Chem Soc 2013; 135:14968-71. [PMID: 24079481 DOI: 10.1021/ja408856p] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A one-pot protocol for the asymmetric α-allylation reaction is reported relying on a key efficient asymmetric Claisen rearrangement, triggered by electrophilic activation of chiral pseudoephedrine amides. Subsequent reduction or hydrolysis of the resulting iminium ions provides highly enantioenriched α-allylic aldehydes or carboxylic acids in a traceless manner. Compared to traditional alternatives which make use of strongly basic conditions, the work presented herein displays unprecedented functional group tolerance.
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Affiliation(s)
- Bo Peng
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1, 45470 Mülheim, Germany
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16
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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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17
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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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