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Bold CP, Lucena-Agell D, Oliva MÁ, Díaz JF, Altmann KH. Synthesis and Biological Evaluation of C(13)/C(13')-Bis(desmethyl)disorazole Z. Angew Chem Int Ed Engl 2023; 62:e202212190. [PMID: 36281761 PMCID: PMC10107878 DOI: 10.1002/anie.202212190] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 10/11/2022] [Accepted: 10/24/2022] [Indexed: 11/05/2022]
Abstract
We describe the total synthesis of the macrodiolide C(13)/C(13')-bis(desmethyl)disorazole Z through double inter-/intramolecular Stille cross-coupling of a monomeric vinyl stannane/vinyl iodide precursor to form the macrocycle. The key step in the synthesis of this precursor was a stereoselective aldol reaction of a formal Evans acetate aldol product with crotonaldehyde. As demonstrated by X-ray crystallography, the binding mode of C(13)/C(13')-bis(desmethyl)disorazole Z to tubulin is virtually identical with that of the natural product disorazole Z. Likewise, C(13)/C(13')-bis(desmethyl)disorazole Z inhibits tubulin assembly with at least the same potency as disorazole Z and it appears to be a more potent cell growth inhibitor.
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Affiliation(s)
- Christian Paul Bold
- Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, ETH Zürich, Vladimir-Prelog-Weg 4, 8093, Zürich, Switzerland
| | - Daniel Lucena-Agell
- Centro de Investigaciones Biológicas Margarita Salas, Consejo Superior de Investigaciones Científicas, Ramiro de Maeztu 9, 28040, Madrid, Spain
| | - María Ángela Oliva
- Centro de Investigaciones Biológicas Margarita Salas, Consejo Superior de Investigaciones Científicas, Ramiro de Maeztu 9, 28040, Madrid, Spain
| | - José Fernando Díaz
- Centro de Investigaciones Biológicas Margarita Salas, Consejo Superior de Investigaciones Científicas, Ramiro de Maeztu 9, 28040, Madrid, Spain
| | - Karl-Heinz Altmann
- Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, ETH Zürich, Vladimir-Prelog-Weg 4, 8093, Zürich, Switzerland
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2
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Al-Fadhli AA, Threadgill MD, Mohammed F, Sibley P, Al-Ariqi W, Parveen I. Macrolides from rare actinomycetes: Structures and bioactivities. Int J Antimicrob Agents 2022; 59:106523. [PMID: 35041941 DOI: 10.1016/j.ijantimicag.2022.106523] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 01/06/2022] [Accepted: 01/10/2022] [Indexed: 11/19/2022]
Abstract
Rare actinomycetes are the sources of numerous biologically active secondary metabolites with diverse structures. Among them are macrolides, which have been shown to display several antibiotic activities. In this review, twenty-six groups of macrolides from rare actinomycetes are presented, with their bioactivities and structures of representatives from each group. It has been divided according to the classes of macrolides. The most interesting groups with a wide range of biological activities are ammocidins, bafilomycins, neomaclafungins, rosaramicins, spinosyns, and tiacumicins. Most macrolides are obtained from the genus, Micromonospora, with smaller contributions from genera such as Saccharothrix, Amycolatopsis, Nocardiopsis and Catenulispora. These macrolides display unique cytotoxic, antibacterial, antifungal, antimicrobial, insecticidal, anti-trypanosomal, antimalarial, antiprotozoal, antimycobacterial and anti-herpetic activity. Based on their noticeable bioactivities and diverse structures, macrolides from rare actinomycetes deserve to be investigated further for future applications in medicine. This work highlights the bioactivities and structures of important classes of macrolides from rare actinomycetes, which could be used in medicine in the future or which are already in the market.
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Affiliation(s)
- Ammar A Al-Fadhli
- Department of Chemistry, Faculty of Science, Sana'a University, Sana'a, Republic of Yemen; Institute of Biological, Environmental & Rural Sciences (IBERS), Aberystwyth University, Aberystwyth SY23 3DA, United Kingdom.
| | - Michael D Threadgill
- Institute of Biological, Environmental & Rural Sciences (IBERS), Aberystwyth University, Aberystwyth SY23 3DA, United Kingdom; Department of Pharmacy & Pharmacology, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
| | - Faez Mohammed
- School of Environmental Sciences, University of Guelph, 50 Stone Road E, Guelph, ON, N1G 2W1, Canada; Faculty of Applied Science-Arhab, Sana'a University, Sana'a, Yemen.
| | - Paul Sibley
- School of Environmental Sciences, University of Guelph, 50 Stone Road E, Guelph, ON, N1G 2W1, Canada
| | - Wadie Al-Ariqi
- Department of Chemistry, Faculty of Science, Sana'a University, Sana'a, Republic of Yemen
| | - Ifat Parveen
- Institute of Biological, Environmental & Rural Sciences (IBERS), Aberystwyth University, Aberystwyth SY23 3DA, United Kingdom
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3
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Fritz L, Wienhold S, Hackl S, Bach T. Total Synthesis of Pulvomycin D. Chemistry 2021; 28:e202104064. [PMID: 34792826 PMCID: PMC9299864 DOI: 10.1002/chem.202104064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Indexed: 11/17/2022]
Abstract
A synthetic route to the pulvomycin class of natural products is presented, which culminated in the first synthesis of a pulvomycin, pulvomycin D. Key elements of the strategy include a pivotal aldol reaction which led to bond formation between the C24‐C40 and the C8‐C23 fragment. The remaining C1‐C7 fragment was attached by a Yamaguchi esterification completing the assembly of the 40 carbon atoms within the main skeleton. Ring closure to the 22‐membered lactone ring was achieved in the final stages of the synthesis by a Heck reaction. The completion of the synthesis required the removal of six silyl protecting groups in combination with olefin formation at C26‐C27 by a Peterson elimination.
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Affiliation(s)
- Lukas Fritz
- School of Natural Sciences, Department of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstrasse 4, 85747, Garching, Germany
| | - Sebastian Wienhold
- School of Natural Sciences, Department of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstrasse 4, 85747, Garching, Germany
| | - Sabrina Hackl
- School of Natural Sciences, Department of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstrasse 4, 85747, Garching, Germany
| | - Thorsten Bach
- School of Natural Sciences, Department of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstrasse 4, 85747, Garching, Germany
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Beemelmanns C, Roman D, Sauer M. Applications of the Horner–Wadsworth–Emmons Olefination in Modern Natural Product Synthesis. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/a-1493-6331] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
AbstractThe Horner–Wadsworth–Emmons (HWE) reaction is one of the most reliable olefination reaction and can be broadly applied in organic chemistry and natural product synthesis with excellent selectivity. Within the last few years HWE reaction conditions have been optimized and new reagents developed to overcome challenges in the total syntheses of natural products. This review highlights the application of HWE olefinations in total syntheses of structurally different natural products covering 2015 to 2020. Applied HWE reagents and reactions conditions are highlighted to support future synthetic approaches and serve as guideline to find the best HWE conditions for the most complicated natural products.1 Introduction and Historical Background2 Applications of HWE2.1 Cyclization by HWE Reactions2.2.1 Formation of Medium- to Larger-Sized Rings2.2.2 Formation of Small- to Medium-Sized Rings2.3 Synthesis of α,β-Unsaturated Carbonyl Groups2.4 Synthesis of Substituted C=C Bonds2.5 Late-Stage Modifications by HWE Reactions2.6 HWE Reactions on Solid Supports2.7 Synthesis of Poly-Conjugated C=C Bonds2.8 HWE-Mediated Coupling of Larger Building Blocks2.9 Miscellaneous3 Summary and Outlook
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Sunnapu R, Rajendar G. A Concise Stereoselective Total Synthesis of Methoxyl Citreochlorols and Their Structural Revisions. European J Org Chem 2021. [DOI: 10.1002/ejoc.202001563] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ranganayakulu Sunnapu
- School of Chemistry Indian Institute of Science Education and Research Thiruvananthapuram Vithura 2209 Trivandrum, Kerala 695551 India
| | - Goreti Rajendar
- School of Chemistry Indian Institute of Science Education and Research Thiruvananthapuram Vithura 2209 Trivandrum, Kerala 695551 India
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Bali AK, Prasad KR. Synthesis of the C9-C22 fragment of polyene polyol containing macrolactone natural product pentamycin. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131708] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Hubert P, Seibel E, Beemelmanns C, Campagne J, Figueiredo RM. Stereoselective Construction of (
E,Z
)‐1,3‐Dienes and Its Application in Natural Product Synthesis. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000730] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Pierre Hubert
- ICGM Univ Montpellier, CNRS, ENSCM Montpellier France
| | - Elena Seibel
- Hans-Knöll-Institute (HKI) Beutenbergstrasse 11a 07745 Jena Germany
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Rivas A, Pequerul R, Barracco V, Domínguez M, López S, Jiménez R, Parés X, Alvarez R, Farrés J, de Lera AR. Synthesis of C11-to-C14 methyl-shifted all-trans-retinal analogues and their activities on human aldo-keto reductases. Org Biomol Chem 2020; 18:4788-4801. [PMID: 32530010 DOI: 10.1039/d0ob01084g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Human aldo-keto reductases (AKRs) are enzymes involved in the reduction, among other substrates, of all-trans-retinal to all-trans-retinol (vitamin A), thus contributing to the control of the levels of retinoids in organisms. Structure-activity relationship studies of a series of C11-to-C14 methyl-shifted (relative to natural C13-methyl) all-trans-retinal analogues as putative substrates of AKRs have been reported. The synthesis of these retinoids was based on the formation of a C10-C11 single bond of the pentaene skeleton starting from a trienyl iodide and the corresponding dienylstannanes and dienylsilanes, using the Stille-Kosugi-Migita and Hiyama-Denmark cross-coupling reactions, respectively. Since these reagents differ by the location and presence of methyl groups at the dienylorganometallic fragment, the study also provided insights into the ability of the different positional isomers to undergo cross-coupling and the sensitivity of these processes to steric hindrance. The resulting C11-to-C14 methyl-shifted all-trans-retinal analogues were found to be active substrates when tested with AKR1B1 and AKR1B10 enzymes, although relevant differences in substrate specificities were noted. For AKR1B1, all analogues exhibited higher catalytic efficiency (kcat/Km) than parent all-trans-retinal. In addition, only all-trans-11-methylretinal, the most hydrophobic derivative, showed a higher value of kcat/Km = 106 000 ± 23 200 mM-1 min-1 for AKR1B10, which is in fact the highest value from all known retinoid substrates of this enzyme. The novel structures, identified as efficient AKR substrates, may serve in the design of selective inhibitors with potential pharmacological interest.
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Affiliation(s)
- Aurea Rivas
- Departamento de Química Orgánica, Facultade de Química, CINBIO and IIS Galicia Sur, Universidade de Vigo, E-36310 Vigo, Spain.
| | - Raquel Pequerul
- Department of Biochemistry and Molecular Biology, Faculty of Biosciences, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Barcelona, Spain
| | - Vito Barracco
- Department of Biochemistry and Molecular Biology, Faculty of Biosciences, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Barcelona, Spain and Department of Biology, Biochemistry Unit, University of Pisa, I-56126 Pisa, Italy
| | - Marta Domínguez
- Departamento de Química Orgánica, Facultade de Química, CINBIO and IIS Galicia Sur, Universidade de Vigo, E-36310 Vigo, Spain.
| | - Susana López
- Departamento de Química Orgánica, Facultade de Química, Universidade de Santiago de Compostela, E-15782 Santiago, Spain
| | - Rafael Jiménez
- Department of Biochemistry and Molecular Biology, Faculty of Biosciences, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Barcelona, Spain
| | - Xavier Parés
- Department of Biochemistry and Molecular Biology, Faculty of Biosciences, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Barcelona, Spain
| | - Rosana Alvarez
- Departamento de Química Orgánica, Facultade de Química, CINBIO and IIS Galicia Sur, Universidade de Vigo, E-36310 Vigo, Spain.
| | - Jaume Farrés
- Department of Biochemistry and Molecular Biology, Faculty of Biosciences, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Barcelona, Spain
| | - Angel R de Lera
- Departamento de Química Orgánica, Facultade de Química, CINBIO and IIS Galicia Sur, Universidade de Vigo, E-36310 Vigo, Spain.
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Maurya V, Appayee C. Enantioselective Total Synthesis of Potent 9β-11-Hydroxyhexahydrocannabinol. J Org Chem 2020; 85:1291-1297. [PMID: 31833372 DOI: 10.1021/acs.joc.9b02962] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The first total synthesis of potent cannabinoid, 9β-11-hydroxyhexahydrocannabinol, is achieved through a proline-catalyzed inverse-electron-demand Diels-Alder reaction. Using this asymmetric catalysis, the cyclohexane ring is constructed with two chiral centers as a single diastereomer with 97% ee. The creation of the third chiral center and benzopyran ring is demonstrated with the elegant synthetic strategies. This mild and efficient synthetic methodology provides a new route for the asymmetric synthesis of the other potent hexahydrocannabinols.
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Affiliation(s)
- Vidyasagar Maurya
- Discipline of Chemistry , Indian Institute of Technology Gandhinagar , Palaj, Gandhinagar , Gujarat 382355 , India
| | - Chandrakumar Appayee
- Discipline of Chemistry , Indian Institute of Technology Gandhinagar , Palaj, Gandhinagar , Gujarat 382355 , India
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Everson J, Kiefel MJ. Synthesis of Butenolides via a Horner-Wadsworth-Emmons Cascading Dimerization Reaction. J Org Chem 2019; 84:15226-15235. [PMID: 31657574 DOI: 10.1021/acs.joc.9b02015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The efficient synthesis of a range of structurally related butenolides has been observed while we were exploring the substrate-scope of a Horner-Wadsworth-Emmons (HWE) reaction. While aliphatic aldehydes gave the expected HWE product, aromatic aldehydes furnished butenolides, resulting from the dimerization of the HWE product during desilylation of the initially formed HWE adduct. In addition to isolating butenolides in a high yield, we have also determined precisely when dimerization occurs.
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Affiliation(s)
- Jack Everson
- Institute for Glycomics , Griffith University Gold Coast Campus , Southport , Queensland 4222 , Australia
| | - Milton J Kiefel
- Institute for Glycomics , Griffith University Gold Coast Campus , Southport , Queensland 4222 , Australia
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12
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Fernandes AAG, Leonarczyk IA, Ferreira MAB, Dias LC. Diastereoselectivity in the boron aldol reaction of α-alkoxy and α,β-bis-alkoxy methyl ketones. Org Biomol Chem 2019; 17:3167-3180. [PMID: 30838365 DOI: 10.1039/c9ob00358d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, using DFT calculations, we investigated the 1,4 and 1,5 asymmetric induction in boron enolate aldol reactions of α-alkoxy and α,β-bisalkoxy methyl ketones. We evaluated the steric influence of alkyl substituents at the α position and the stereoelectronic influence of the oxygen protecting groups at the α and β positions. Theoretical calculations revealed the origins of the 1,4 asymmetric induction in terms of the nature of the β-substituent. The synergistic effect between the α,β-syn and α,β-anti-bisalkoxy stereocenters was elucidated. In the presence of the β-alkoxy center, the reaction proceeds through the Goodman-Paton 1,5-stereoinduction model, experiencing a minor influence of the α-alkoxy center.
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Abstract
Covering: January to December 2017This review covers the literature published in 2017 for marine natural products (MNPs), with 740 citations (723 for the period January to December 2017) referring to compounds isolated from marine microorganisms and phytoplankton, green, brown and red algae, sponges, cnidarians, bryozoans, molluscs, tunicates, echinoderms, mangroves and other intertidal plants and microorganisms. The emphasis is on new compounds (1490 in 477 papers for 2017), together with the relevant biological activities, source organisms and country of origin. Reviews, biosynthetic studies, first syntheses, and syntheses that led to the revision of structures or stereochemistries, have been included. Geographic distributions of MNPs at a phylogenetic level are reported.
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Affiliation(s)
- Anthony R Carroll
- School of Environment and Science, Griffith University, Gold Coast, Australia. and Griffith Institute for Drug Discovery, Griffith University, Brisbane, Australia
| | - Brent R Copp
- School of Chemical Sciences, University of Auckland, Auckland, New Zealand
| | - Rohan A Davis
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, Australia
| | - Robert A Keyzers
- Centre for Biodiscovery, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, New Zealand
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14
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Herndon JW. The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2017. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.08.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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15
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Werner D, Anwander R. Unveiling the Takai Olefination Reagent via Tris( tert-butoxy)siloxy Variants. J Am Chem Soc 2018; 140:14334-14341. [PMID: 30213182 DOI: 10.1021/jacs.8b08739] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The elusive Takai olefination reagent, namely, the iodo-methylidene Cr(III) complex [Cr2Cl4(CHI)(thf)4], has been isolated by careful handling of the reaction between CrCl2 and CHI3 in THF at -35 °C. Alternatively, treatment of [Cr(OSi(O tBu)3)2] with CHI3 gave the mixed-valent dihalido-methanide complex [CrII/III2I2(OSi(O tBu)3)2(CHI2)], featuring a Cr(III)-CHI2 moiety. In the presence of TMEDA nucleophilic attack at CHI2 occurred generating the zwitterionic species [CrIII(OSi(O tBu)3)2(tmeda-CHI)][I]. Complexes [Cr2Cl4(CHI)(thf)4] and [CrII/III2I2(OSi(O tBu)3)2(CHI2)] were screened for their ability to induce monohalido olefination of benzaldehyde. Remarkably, both complexes promote olefination, with [Cr2Cl4(CHI)(thf)4] accomplishing the same E selectivity as Takai 's original mixture. Complex [CrII/III2I2(OSi(O tBu)3)2(CHI2)], however, appeared to give preferentially Z isomer, corroborating the monoiodo-methylidene species Cr(III)-CHI-Cr(III) as the active olefination component of the original in situ generated Takai reagent mixture.
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Affiliation(s)
- Daniel Werner
- Institut für Anorganische Chemie , Eberhard Karls Universität Tübingen , Auf der Morgenstelle 18 , 72076 Tübingen , Germany
| | - Reiner Anwander
- Institut für Anorganische Chemie , Eberhard Karls Universität Tübingen , Auf der Morgenstelle 18 , 72076 Tübingen , Germany
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16
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Heravi MM, Mohammadkhani L. Recent applications of Stille reaction in total synthesis of natural products: An update. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.05.018] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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17
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Feceu A, Sangster LE, Martin DBC. Unexpected Alkene Isomerization during Iterative Cross-Coupling To Form Hindered, Electron-Deficient Trienes. Org Lett 2018; 20:3151-3155. [PMID: 29781280 DOI: 10.1021/acs.orglett.8b00809] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
An iterative cross-coupling approach to conjugated trienes was explored as part of a planned stereoselective synthesis of bicyclic terpenes. Using a bifunctional bromoboronate building block, sequential Suzuki coupling reactions were employed to provide a conjugated trienone target containing a tetrasubstituted alkene. During the final cross-coupling step, an unexpected alkene isomerization was observed to give less hindered trans products. Examination of different substrates determined that conjugation to a ketone withdrawing group was responsible for isomerization, rather than steric hindrance of the tetrasubstituted alkene.
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Affiliation(s)
- Abigail Feceu
- Department of Chemistry , University of California , Riverside , California 92521 , United States
| | - Lauren E Sangster
- Department of Chemistry , University of California , Riverside , California 92521 , United States
| | - David B C Martin
- Department of Chemistry , University of California , Riverside , California 92521 , United States
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19
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Kuilya TK, Das S, Saha D, Goswami RK. Studies toward the synthesis of strevertenes A and G: stereoselective construction of C1–C19segments of the molecules. Org Biomol Chem 2018; 16:7595-7608. [DOI: 10.1039/c8ob01754a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Efficient route for the stereoselective synthesis of common C1–C19segment of strevertenes A and G has been developed.
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Affiliation(s)
- Tapan Kumar Kuilya
- Department of Organic Chemistry
- Indian Association for the Cultivation of Science
- Kolkata-700032
- India
| | - Subhendu Das
- Department of Organic Chemistry
- Indian Association for the Cultivation of Science
- Kolkata-700032
- India
| | - Dhiman Saha
- Department of Organic Chemistry
- Indian Association for the Cultivation of Science
- Kolkata-700032
- India
| | - Rajib Kumar Goswami
- Department of Organic Chemistry
- Indian Association for the Cultivation of Science
- Kolkata-700032
- India
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Zhang FM, Zhang SY, Tu YQ. Recent progress in the isolation, bioactivity, biosynthesis, and total synthesis of natural spiroketals. Nat Prod Rep 2018; 35:75-104. [DOI: 10.1039/c7np00043j] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The isolation, bioactivity, biosynthesis, and total synthesis of natural spiroketals from 2011 to July 2017 have been summarized in this review.
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Affiliation(s)
- Fu-Min Zhang
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Shu-Yu Zhang
- School of Chemistry and Chemical Engineering
- Shanghai Jiao Tong University
- Shanghai 200240
- P. R. China
| | - Yong-Qiang Tu
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
- School of Chemistry and Chemical Engineering
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Li H, Jin R, Li Y, Ding A, Hao X, Guo H. Transformation of Organostannanes Based on Photocleavage of C-Sn Bond via Single Electron Transfer Process. Sci Rep 2017; 7:16559. [PMID: 29185469 PMCID: PMC5707384 DOI: 10.1038/s41598-017-16806-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Accepted: 11/16/2017] [Indexed: 11/16/2022] Open
Abstract
In this work, we developed a new method for the transformation of organostannanes via radical process. In this reaction, highly reactive carbon radical species can be efficiently generated through HBr-catalyzed photocleavage of C-Sn bond via single electron transfer process. Under aerobic conditions, the in situ formed primary/secondary alkyl radicals can be further highly selectively oxidized into carboxylic acids/ketones, respectively.
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Affiliation(s)
- Han Li
- College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 of Science Road, Henan, 450001, People's Republic of China
| | - Ruiwen Jin
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433, People's Republic of China
| | - Yawei Li
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433, People's Republic of China
| | - Aishun Ding
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433, People's Republic of China
| | - Xinqi Hao
- College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 of Science Road, Henan, 450001, People's Republic of China.
| | - Hao Guo
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433, People's Republic of China.
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