1
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Wang J, Guo C, Liu Y, Ji Y, Jia H, Li H. Enantioselective Synthesis of the 1,3-Dienyl-5-Alkyl-6-Oxy Motif: Method Development and Total Synthesis. Angew Chem Int Ed Engl 2024; 63:e202400478. [PMID: 38270494 DOI: 10.1002/anie.202400478] [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: 01/08/2024] [Revised: 01/24/2024] [Accepted: 01/25/2024] [Indexed: 01/26/2024]
Abstract
The 1,3-dienyl-5-alkyl-6-oxy motif is widely found in various types of bioactive natural products. However, present synthesis is mainly non-asymmetric which relied upon different olefination or transition metal-catalyzed cross-coupling reactions using enantioenriched precursors. Herein, based upon a newly developed enantioselective α-alkylation of conjugated polyenoic acids, a variety of 1,3-dienyl-5-alkyl-6-oxy motif (with E-configured internal olefin) was generated as the corresponding α-adducts in a highly enantioselective and diastereoselective manner. Utilizing 1,3-dienyl-5-alkyl-6-oxy motif as key intermediates, we further demonstrated their synthetic potential by expedient total syntheses of three types of natural products (glutarimide antibiotics, α-pyrone polyketides and Lupin alkaloids) within 4-7 steps.
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Affiliation(s)
- Jie Wang
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Chuning Guo
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Yaqian Liu
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Yunpeng Ji
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Hongli Jia
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Houhua Li
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
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2
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Yang X, Hua C, Lin L, Ganting Z. Antimicrobial peptides as potential therapy for gastrointestinal cancers. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2023; 396:2831-2841. [PMID: 37249612 DOI: 10.1007/s00210-023-02536-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Accepted: 05/16/2023] [Indexed: 05/31/2023]
Abstract
Since conventional therapy faces limitations in the field of different cancers as well as gastrointestinal cancers, that decrease the survival rate of patients, there is an urgent need to find new effective therapeutic approaches without the adverse effects of the traditional agents. Antimicrobial peptides (AMPs) attract much attention and are well known for their role in innate immunity. These peptides, in addition to their antimicrobial activity, exhibit strong anticancer potential against various types of malignancy. AMPs specifically target tumor cells and have selective toxicity for these cells without affecting normal cells. Here we aim to comprehensively overview the current knowledge in the field of using AMPs as novel therapeutic agents for gastrointestinal cancer.
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Affiliation(s)
- Xiaoxia Yang
- Heping Hospital Attached to Changzhi Medical College, Changzhi, 046000, China
| | - Cui Hua
- Tangshan Fengnan District Traditional Chinese Medicine Hospital, Tangshan, 063000, China.
| | - Lin Lin
- Tangshan Hongci Hospital, Tangshan, 063000, China
| | - Zhao Ganting
- Heping Hospital Attached to Changzhi Medical College, Changzhi, 046000, China
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3
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Miyakita D, Kawanishi K, Katsuyama A, Yamamoto K, Yakushiji F, Ichikawa S. Solid-Phase Synthesis of Nannocystin Ax and Its Analogues. J Org Chem 2023. [PMID: 37466434 DOI: 10.1021/acs.joc.3c01189] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/20/2023]
Abstract
Solid-phase total synthesis of nannocystin Ax (1) was disclosed. A coupling reaction between a peptide and a polyketide moiety was conducted on a solid support, and macrocyclization was achieved by Mitsunobu cyclization. The established synthetic route was efficient to prepare its analogues, which contain different types of peptide moieties.
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Affiliation(s)
- Daiki Miyakita
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
| | - Kohei Kawanishi
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
| | - Akira Katsuyama
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
- Center for Research and Education on Drug Discovery, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
- Global Station for Biosurfaces and Drug Discovery, Global Institution for Collaborative Research and Education (GI-CoRE), Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
| | - Kazuki Yamamoto
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
- Center for Research and Education on Drug Discovery, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
| | - Fumika Yakushiji
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
- Center for Research and Education on Drug Discovery, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
- Global Station for Biosurfaces and Drug Discovery, Global Institution for Collaborative Research and Education (GI-CoRE), Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
| | - Satoshi Ichikawa
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
- Center for Research and Education on Drug Discovery, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
- Global Station for Biosurfaces and Drug Discovery, Global Institution for Collaborative Research and Education (GI-CoRE), Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
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4
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Zhang H, Cai J, Yu S, Sun B, Zhang W. Anticancer Small-Molecule Agents Targeting Eukaryotic Elongation Factor 1A: State of the Art. Int J Mol Sci 2023; 24:ijms24065184. [PMID: 36982256 PMCID: PMC10049629 DOI: 10.3390/ijms24065184] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 03/05/2023] [Accepted: 03/07/2023] [Indexed: 03/29/2023] Open
Abstract
Eukaryotic elongation factor 1A (eEF1A) canonically delivers amino acyl tRNA to the ribosomal A site during the elongation stage of protein biosynthesis. Yet paradoxically, the oncogenic nature of this instrumental protein has long been recognized. Consistently, eEF1A has proven to be targeted by a wide assortment of small molecules with excellent anticancer activity, among which plitidepsin has been granted approval for the treatment of multiple myeloma. Meanwhile, metarrestin is currently under clinical development for metastatic cancers. Bearing these exciting advances in mind, it would be desirable to present a systematic up-to-date account of the title topic, which, to the best of our knowledge, has thus far been unavailable in the literature. The present review summarizes recent advances in eEF1A-targeting anticancer agents, both naturally occurring and synthetically crafted, with regard to their discovery or design, target identification, structure–activity relationship, and mode of action. Their structural diversity and differential eEF1A-targeting mechanisms warrant continuing research in pursuit of curing eEF1A-driven malignancy.
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5
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Gribble GW. Naturally Occurring Organohalogen Compounds-A Comprehensive Review. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 2023; 121:1-546. [PMID: 37488466 DOI: 10.1007/978-3-031-26629-4_1] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/26/2023]
Abstract
The present volume is the third in a trilogy that documents naturally occurring organohalogen compounds, bringing the total number-from fewer than 25 in 1968-to approximately 8000 compounds to date. Nearly all of these natural products contain chlorine or bromine, with a few containing iodine and, fewer still, fluorine. Produced by ubiquitous marine (algae, sponges, corals, bryozoa, nudibranchs, fungi, bacteria) and terrestrial organisms (plants, fungi, bacteria, insects, higher animals) and universal abiotic processes (volcanos, forest fires, geothermal events), organohalogens pervade the global ecosystem. Newly identified extraterrestrial sources are also documented. In addition to chemical structures, biological activity, biohalogenation, biodegradation, natural function, and future outlook are presented.
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Affiliation(s)
- Gordon W Gribble
- Department of Chemistry, Dartmouth College, Hanover, NH, 03755, USA.
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6
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Nomula R, Pratapure MS, Kontham R. Studies Directed Toward the Total Synthesis of Nannocystin A. ChemistrySelect 2022. [DOI: 10.1002/slct.202203893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Rajesh Nomula
- Organic Chemistry Division CSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pune 411008 India
| | - Madhukar S. Pratapure
- Organic Chemistry Division CSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pune 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Ravindar Kontham
- Organic Chemistry Division CSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pune 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
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7
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Cyclic Peptides for the Treatment of Cancers: A Review. Molecules 2022; 27:molecules27144428. [PMID: 35889301 PMCID: PMC9317348 DOI: 10.3390/molecules27144428] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 07/03/2022] [Accepted: 07/07/2022] [Indexed: 02/04/2023] Open
Abstract
Cyclic peptides have been widely reported to have therapeutic abilities in the treatment of cancer. This has been proven through in vitro and in vivo studies against breast, lung, liver, colon, and prostate cancers, among others. The multitude of data available in the literature supports the potential of cyclic peptides as anticancer agents. This review summarizes the findings from previously reported studies and discusses the different cyclic peptide compounds, the sources, and their modes of action as anticancer agents. The prospects and future of cyclic peptides will also be described to give an overview on the direction of cyclic peptide development for clinical applications.
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8
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Schwinger DP, Peschel MT, Jaschke C, Jandl C, de Vivie-Riedle R, Bach T. Diels-Alder Reaction of Photochemically Generated ( E)-Cyclohept-2-enones: Diene Scope, Reaction Pathway, and Synthetic Application. J Org Chem 2022; 87:4838-4851. [PMID: 35315664 DOI: 10.1021/acs.joc.2c00186] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Upon irradiation at λ = 350 nm, cyclohept-2-enone undergoes an isomerization to the strained (E)-isomer. The process was studied by XMS-CASPT2 calculations and found to proceed by two competitive reaction channels on either the singlet or the triplet hypersurface. (E)-Cyclohept-2-enone is a reactive dienophile in thermal [4 + 2] cycloaddition reactions with various dienes. Ten different dienes were probed, most of which─except for 1,3-cyclohexadiene─underwent a clean Diels-Alder reaction and gave the respective trans-fused six-membered rings in good yields (68-98%). The reactions with furan were studied in detail, both experimentally and by DLPNO-CCSD(T) calculations. Two diastereoisomers were formed in a ratio of 63/35 with the exo-product prevailing, and the configuration of both diastereoisomers was corroborated by single crystal X-ray crystallography. The outcome of the photoinduced Diels-Alder reaction matched both qualitatively and quantitatively the calculated reaction pathway. Apart from cyclohept-2-enone, five additional cyclic hept-2-enones and cyclooct-2-enone were employed in their (E)-form as dienophiles in the Diels-Alder reaction with 1,3-cyclopentadiene (80-98% yield). The method was eventually applied to a concise total synthesis of racemic trans-α-himachalene (four steps, 14% overall yield).
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Affiliation(s)
- Daniel P Schwinger
- School of Natural Sciences, Department of Chemistry and Catalysis Research Center (CRC), Technical University of Munich, Lichtenbergstr. 4, 85747 Garching, Germany
| | - Martin T Peschel
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstr. 11, 81377 München, Germany
| | - Constantin Jaschke
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstr. 11, 81377 München, Germany
| | - Christian Jandl
- School of Natural Sciences, Department of Chemistry and Catalysis Research Center (CRC), Technical University of Munich, Lichtenbergstr. 4, 85747 Garching, Germany
| | - Regina de Vivie-Riedle
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstr. 11, 81377 München, Germany
| | - Thorsten Bach
- School of Natural Sciences, Department of Chemistry and Catalysis Research Center (CRC), Technical University of Munich, Lichtenbergstr. 4, 85747 Garching, Germany
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9
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Eggert A, Etling C, Millbrodt L, Schulz G, Kalesse M. Oxazaborolidinone-Mediated Asymmetric Bisvinylogous Mukaiyama Aldol Reaction. Org Lett 2021; 23:8722-8726. [PMID: 34738464 DOI: 10.1021/acs.orglett.1c03165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A bisvinylogous Mukaiyama aldol reaction using oxazaborolidinones as a source of chirality was developed. This methodology allows the fast assembly of conjugated dienols by expanding the vinylogy principle by two additional carbons, and can be conducted using a readily available Lewis acid at reasonable reaction times. A broad range of aromatic and aliphatic aldehydes can be used providing access to complex building blocks for polyketide synthesis.
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Affiliation(s)
- Alina Eggert
- Institute for Organic Chemistry, Leibniz University Hannover, Schneiderberg 1b, 30167 Hannover, Germany.,Centre of Biomolecular Drug Research (BMWZ), Schneiderberg 38, 30167 Hannover, Germany
| | - Christoph Etling
- Institute for Organic Chemistry, Leibniz University Hannover, Schneiderberg 1b, 30167 Hannover, Germany.,Centre of Biomolecular Drug Research (BMWZ), Schneiderberg 38, 30167 Hannover, Germany
| | - Lucas Millbrodt
- Institute for Organic Chemistry, Leibniz University Hannover, Schneiderberg 1b, 30167 Hannover, Germany.,Centre of Biomolecular Drug Research (BMWZ), Schneiderberg 38, 30167 Hannover, Germany
| | - Göran Schulz
- Institute for Organic Chemistry, Leibniz University Hannover, Schneiderberg 1b, 30167 Hannover, Germany
| | - Markus Kalesse
- Institute for Organic Chemistry, Leibniz University Hannover, Schneiderberg 1b, 30167 Hannover, Germany.,Centre of Biomolecular Drug Research (BMWZ), Schneiderberg 38, 30167 Hannover, Germany.,Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstraße 7, 38124 Braunschweig, Germany
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10
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Amatov T, Tsuji N, Maji R, Schreyer L, Zhou H, Leutzsch M, List B. Confinement-Controlled, Either syn- or anti-Selective Catalytic Asymmetric Mukaiyama Aldolizations of Propionaldehyde Enolsilanes. J Am Chem Soc 2021; 143:14475-14481. [PMID: 34436899 PMCID: PMC8447262 DOI: 10.1021/jacs.1c07447] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
![]()
Protected aldols
(i.e., true aldols derived from aldehydes) with
either syn- or anti- stereochemistry
are versatile intermediates in many oligopropionate syntheses. Traditional
stereoselective approaches to such aldols typically require several
nonstrategic operations. Here we report two highly enantioselective
and diastereoselective catalytic Mukaiyama aldol reactions of the
TBS- or TES- enolsilanes of propionaldehyde with aromatic aldehydes.
Our reactions directly deliver valuable silyl protected propionaldehyde
aldols in a catalyst controlled manner, either as syn- or anti- isomer. We have identified a privileged
IDPi catalyst motif that is tailored for controlling these aldolizations
with exceptional selectivities. We demonstrate how a single atom modification
in the inner core of the IDPi catalyst, replacing a CF3-group with a CF2H-group, leads to a dramatic switch in
enantiofacial differentiation of the aldehyde. The origin of this
remarkable effect was attributed to tightening of the catalytic cavity
via unconventional C–H hydrogen bonding of the CF2H group.
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Affiliation(s)
- Tynchtyk Amatov
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Nobuya Tsuji
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo 001-0021, Japan
| | - Rajat Maji
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Lucas Schreyer
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Hui Zhou
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Markus Leutzsch
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany.,Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo 001-0021, Japan
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11
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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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12
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Sun C, Liu R, Xia M, Hou Y, Wang X, Lu JJ, Liu B, Chen X. Nannocystin Ax, a natural elongation factor 1α inhibitor from Nannocystis sp., suppresses epithelial-mesenchymal transition, adhesion and migration in lung cancer cells. Toxicol Appl Pharmacol 2021; 420:115535. [PMID: 33848516 DOI: 10.1016/j.taap.2021.115535] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 04/07/2021] [Accepted: 04/09/2021] [Indexed: 11/17/2022]
Abstract
Epithelial-mesenchymal transition (EMT), the epithelial cells transdifferentiation into the mesenchymal cells, has been involved in cancer metastasis. Nannocystin ax (NAN) is a cyclodepsipeptide initially isolated from Myxobacterial genus, Nannocystis sp. with anticancer activities. This study was designed to explore the effect of NAN on TGF-β1-induced EMT in lung cancer cells. The morphological alteration was observed with a microscope. Western blotting and immunofluorescence assays were used to detect the protein expression and the localization. The adhesion and migration were evaluated by adhesion assay and wound healing assay. The mRNA expression of TGF-β receptor type I (TβRI) was determined by real-time PCR. NAN significantly restrained TGF-β1-induced EMT morphological changes, the protein expression of E-cadherin, N-cadherin, and Vimentin, etc. TGF-β1 activated phosphorylation and nuclear translocation of Smad2/3 were inhibited by NAN. Furthermore, NAN suppressed adhesion and migration triggered by TGF-β1. In addition, NAN significantly down-regulated TβRI on the transcriptional level directly. In summary, these results showed that NAN restrained TGF-β1-induced epithelial-mesenchymal transition, migration, and adhesion in human lung cancer cells. The underlying mechanism involved the inhibition of Smad2/3 and the TβRI signaling pathway. This study reveals the new anticancer effect and mechanism of NAN.
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Affiliation(s)
- Chong Sun
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Rong Liu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, China
| | - Mengwei Xia
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, China
| | - Ying Hou
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Xumei Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Jin-Jian Lu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Bo Liu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, China.
| | - Xiuping Chen
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China.
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13
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Optimization of Two Steps in Scale-Up Synthesis of Nannocystin A. Mar Drugs 2021; 19:md19040198. [PMID: 33807472 PMCID: PMC8066987 DOI: 10.3390/md19040198] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 03/23/2021] [Accepted: 03/29/2021] [Indexed: 01/03/2023] Open
Abstract
We have accomplished a 10-step (longest linear) total synthesis of nannocystin A on a four hundred milligram scale. The previously reported Kobayashi vinylogous Mukaiyama aldol reaction to connect C4 and C5 was unreproducible during the scaling up process. A more convenient and cost-efficient Keck asymmetric vinylogous aldol reaction was employed to improve this transformation.
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14
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Linne Y, Bonandi E, Tabet C, Geldsetzer J, Kalesse M. The Total Synthesis of Chondrochloren A. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yannick Linne
- Institute for Organic Chemistry Gottfried Wilhelm Leibniz Universität Hannover Schneiderberg 1B 30167 Hannover Germany
| | - Elisa Bonandi
- Institute for Organic Chemistry Gottfried Wilhelm Leibniz Universität Hannover Schneiderberg 1B 30167 Hannover Germany
| | - Christopher Tabet
- Institute for Organic Chemistry Gottfried Wilhelm Leibniz Universität Hannover Schneiderberg 1B 30167 Hannover Germany
| | - Jan Geldsetzer
- Helmholtz Centre for Infection Research (HZI) Inhoffenstrasse 7 38124 Braunschweig Germany
| | - Markus Kalesse
- Institute for Organic Chemistry Gottfried Wilhelm Leibniz Universität Hannover Schneiderberg 1B 30167 Hannover Germany
- Centre of Biomolecular Drug Research (BMWZ) Gottfried Wilhelm Leibniz Universität Hannover Schneiderberg 38 30167 Hannover Germany
- Helmholtz Centre for Infection Research (HZI) Inhoffenstrasse 7 38124 Braunschweig Germany
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15
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Linne Y, Bonandi E, Tabet C, Geldsetzer J, Kalesse M. The Total Synthesis of Chondrochloren A. Angew Chem Int Ed Engl 2021; 60:6938-6942. [PMID: 33450788 PMCID: PMC8048958 DOI: 10.1002/anie.202016072] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 01/13/2021] [Indexed: 12/01/2022]
Abstract
The first total synthesis of chondrochloren A is accomplished using a 1,2‐metallate rearrangement addition as an alternative for the Nozaki‐Hiyama‐Kishi reaction. This transformation also avoids the inherent challenges of this polyketide segment and provides a new, unprecedented strategy to assemble polyketidal frameworks. The formation of the Z‐enamide is accomplished using a Z‐selective cross coupling of the corresponding amide to a Z‐vinyl bromide.
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Affiliation(s)
- Yannick Linne
- Institute for Organic Chemistry, Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany
| | - Elisa Bonandi
- Institute for Organic Chemistry, Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany
| | - Christopher Tabet
- Institute for Organic Chemistry, Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany
| | - Jan Geldsetzer
- Helmholtz Centre for Infection Research (HZI), Inhoffenstrasse 7, 38124, Braunschweig, Germany
| | - Markus Kalesse
- Institute for Organic Chemistry, Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany.,Centre of Biomolecular Drug Research (BMWZ), Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 38, 30167, Hannover, Germany.,Helmholtz Centre for Infection Research (HZI), Inhoffenstrasse 7, 38124, Braunschweig, Germany
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16
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Poock C, Kalesse M. Total Synthesis and Structure Revision of Halioxepine. Chemistry 2021; 27:1615-1619. [PMID: 33215739 PMCID: PMC7898713 DOI: 10.1002/chem.202004847] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 11/19/2020] [Indexed: 02/04/2023]
Abstract
The first total synthesis of halioxepine is accomplished using a 1,4-addition for constructing the quaternary center at C10 and a halo etherification for the generation of the tertiary ether at C7. The correct structure of halioxepine was determined by assembling different enantiomeric building blocks and by changing the relative configuration between C10 and C15.
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Affiliation(s)
- Caroline Poock
- Institute for Organic ChemistryGottfried Wilhelm Leibniz Universität HannoverSchneiderberg 1B30167HannoverGermany
| | - Markus Kalesse
- Institute for Organic ChemistryGottfried Wilhelm Leibniz Universität HannoverSchneiderberg 1B30167HannoverGermany
- Centre of Biomolecular Drug Research (BMWZ)Gottfried Wilhelm Leibniz Universität HannoverSchneiderberg 3830167HannoverGermany
- Helmholtz Centre for Infection Research (HZI)Inhoffenstrasse 738124BraunschweigGermany
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17
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From Target-Oriented to Motif-Oriented: A Case Study on Nannocystin Total Synthesis. Molecules 2020; 25:molecules25225327. [PMID: 33203102 PMCID: PMC7697126 DOI: 10.3390/molecules25225327] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 11/09/2020] [Accepted: 11/11/2020] [Indexed: 01/14/2023] Open
Abstract
Natural product total synthesis is in essence target-oriented in that a set of organic transformations are orchestrated into a workable process, leading ultimately to the target molecule with a predefined architecture. For a bioactive lead, proof of synthetic viability is merely the beginning. Ensuing effort repurposes the initial synthesis for structural diversification in order to probe structure-activity relationship (SAR). Yet accessibility is not equal to flexibility; moving from convergency to divergency, it is not always feasible to explore the chemical space around a particular substructure of interest simply by tweaking an established route. In this situation, the motif-oriented strategy becomes a superior choice, which gives priority to synthetic flexibility at the concerned site such that a route is adopted only if it is capable of implementing diversification therein. This strategy was recently devised by Fürstner et al., enabling them to achieve total synthesis of both natural and non-natural nannocystins varied at an otherwise challenging position. The present review examines seven distinctive nannocystin total syntheses reported thus far and showcases the merits of conventional (target-oriented) as well as motif-oriented strategies, concluding that these two approaches complement each other and are both indispensable for natural product based drug discovery.
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18
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El-Faham A, Albericio F, Manne SR, de la Torre BG. OxymaPure Coupling Reagents: Beyond Solid-Phase Peptide Synthesis. SYNTHESIS-STUTTGART 2020. [DOI: 10.1055/s-0040-1706296] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
AbstractOxymaPure [ethyl 2-cyano-2-(hydroxyimino)acetate] is an exceptional reagent with which to suppress racemization and enhance coupling efficiency during amide bond formation. The tremendous popularity of OxymaPure has led to the development of several Oxyma-based reagents. OxymaPure and its derived reagents are widely used in solid- and solution-phase peptide chemistry. This review summarizes the recent developments and applications of OxymaPure and Oxyma-based reagents in peptide chemistry, in particular in solution-phase chemistry. Moreover, the side reaction associated with OxymaPure is also discussed.1 Introduction2 Oxyma-Based Coupling Reagents2.1 Aminium/Uronium Salts of OxymaPure2.2 Phosphonium Salts of OxymaPure2.3 Oxyma-Based Phosphates2.4 Sulfonate Esters of OxymaPure2.5 Benzoate Esters of OxymaPure2.6 Carbonates of OxymaPure Derivatives3 OxymaPure Derivatives4 Other Oxime-Based Additives and Coupling Reagents5 Side Reactions Using OxymaPure Derivatives6 Conclusion7 List of Abbreviations
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Affiliation(s)
- Ayman El-Faham
- Department of Chemistry, College of Science, King Saud University
- Department of Chemistry, Faculty of Science, Alexandria University,
| | - Fernando Albericio
- Peptide Science Laboratory, School of Chemistry and Physics, University of KwaZulu-Natal
- Department of Chemistry, College of Science, King Saud University
- Institute for Advanced Chemistry of Catalonia (IQAC-CSIC)
- CIBER-BBN, Networking Centre on Bioengineering, Biomaterials and Nanomedicine, and Department of Organic Chemistry, University of Barcelona
| | - Srinivasa Rao Manne
- Peptide Science Laboratory, School of Chemistry and Physics, University of KwaZulu-Natal
| | - Beatriz G. de la Torre
- Peptide Science Laboratory, School of Chemistry and Physics, University of KwaZulu-Natal
- KwaZulu-Natal Research Innovation and Sequencing Platform (KRISP), School of Laboratory Medicine and Medical Sciences, College of Health Sciences, University of KwaZulu-Natal
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19
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Linne Y, Schönwald A, Weißbach S, Kalesse M. Desymmetrization of C 2 -Symmetric Bis(Boronic Esters) by Zweifel Olefinations. Chemistry 2020; 26:7998-8002. [PMID: 32068298 PMCID: PMC7384159 DOI: 10.1002/chem.202000599] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Indexed: 02/05/2023]
Abstract
anti‐Configured 1,3‐dimethyl deoxypropionate motifs are important sub structures in natural products. Herein, we describe a bidirectional approach for the rapid construction of natural products featuring such motifs by using C2‐symmetrical 1,3‐bis(boronic esters). As for its application in convergent syntheses it was important to establish a selective mono‐Zweifel olefination we describe the scope and limitations by using different 1,3‐bis(boronic esters) and nucleophiles. This protocol takes advantage of the combination of the Hoppe–Matteson–Zweifel chemistry, which was elegantly put into practice by Aggarwal et al. In order to show its applicability the total syntheses of two natural products, serricornin and (+)‐invictolide, were performed.
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Affiliation(s)
- Yannick Linne
- Institute for Organic Chemistry, Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany.,Centre of Biomolecular Drug Research (BMWZ), Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 38, 30167, Hannover, Germany
| | - Axel Schönwald
- Institute for Organic Chemistry, Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany
| | - Sebastian Weißbach
- Institute for Organic Chemistry, Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany
| | - Markus Kalesse
- Institute for Organic Chemistry, Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany.,Centre of Biomolecular Drug Research (BMWZ), Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 38, 30167, Hannover, Germany.,Helmholtz Centre for Infection Research (HZI), Inhoffenstrasse 7, 38124, Braunschweig, Germany
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20
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Geldsetzer J, Kalesse M. Towards the total synthesis of chondrochloren A: synthesis of the ( Z)-enamide fragment. Beilstein J Org Chem 2020; 16:670-673. [PMID: 32362944 PMCID: PMC7176928 DOI: 10.3762/bjoc.16.64] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Accepted: 03/31/2020] [Indexed: 12/03/2022] Open
Abstract
The stereoselective synthesis of the (Z)-enamide fragment of chondrochloren (1) is described. A Buchwald-type coupling between amide 3 and (Z)-bromide 4 was used to generate the required fragment. The employed amide 3 comprising three chiral centers was obtained through a seven-step sequence starting from ᴅ-ribonic acid-1,4-lactone. The (Z)-vinyl bromide 4 is accessible in four steps from 4-hydroxybenzaldehyde. The pivotal cross coupling between both fragments was achieved after extensive experimentation with copper(I) iodide, K2CO3 and N,N′-dimethylethane-1,2-diamine.
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Affiliation(s)
- Jan Geldsetzer
- Helmholtz Centre of Infection Research (HZI), Inhoffenstr. 7, 38124 Braunschweig, Germany
| | - Markus Kalesse
- Helmholtz Centre of Infection Research (HZI), Inhoffenstr. 7, 38124 Braunschweig, Germany.,Leibniz Universität Hannover, Institute of Organic Chemistry, Schneiderberg 1B, 30167 Hannover, Germany.,Centre for Biomolecular Drug Research (BWMZ), Schneiderberg 38, 30167 Hannover, Germany
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21
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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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22
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Cordes M, Kalesse M. Very Recent Advances in Vinylogous Mukaiyama Aldol Reactions and Their Applications to Synthesis. Molecules 2019; 24:molecules24173040. [PMID: 31443344 PMCID: PMC6749529 DOI: 10.3390/molecules24173040] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 08/15/2019] [Accepted: 08/19/2019] [Indexed: 02/07/2023] Open
Abstract
It is a challenging objective in synthetic organic chemistry to create efficient access to biologically active compounds. In particular, one structural element which is frequently incorporated into the framework of complex natural products is a β-hydroxy ketone. In this context, the aldol reaction is the most important transformation to generate this structural element as it not only creates new C-C bonds but also establishes stereogenic centers. In recent years, a large variety of highly selective methodologies of aldol and aldol-type reactions have been put forward. In this regard, the vinylogous Mukaiyama aldol reaction (VMAR) became a pivotal transformation as it allows the synthesis of larger fragments while incorporating 1,5-relationships and generating two new stereocenters and one double bond simultaneously. This review summarizes and updates methodology-oriented and target-oriented research focused on the various aspects of the vinylogous Mukaiyama aldol (VMA) reaction. This manuscript comprehensively condenses the last four years of research, covering the period 2016-2019.
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Affiliation(s)
- Martin Cordes
- Institute of Organic Chemistry, Gottfried Wilhelm Leibniz University of Hannover, Schneiderberg 1b, 30167 Hannover, Germany
| | - Markus Kalesse
- Institute of Organic Chemistry, Gottfried Wilhelm Leibniz University of Hannover, Schneiderberg 1b, 30167 Hannover, Germany.
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23
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Lücke D, Kalesse M. Polyoxygenated Tertiary Alcohols: A Kiyooka Approach. Chemistry 2019; 25:10080-10083. [PMID: 31173411 DOI: 10.1002/chem.201902589] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Indexed: 01/29/2023]
Abstract
A Kiyooka aldol approach for the stereoselective synthesis of tertiary alcohols is presented. This approach allows for the incorporation of different substituents at all three remaining positions at the chiral center bearing the tertiary alcohol. To demonstrate the validity of this approach different chiral alcohols were depicted and the relationship of double bond geometry of the ketene acetal and the diastereoselectivity was established.
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Affiliation(s)
- Daniel Lücke
- Institute for Organic Chemistry, Gottfried Wilhelm Leibniz Universität Hannover, 30167, Hannover, Germany.,Centre of Biomolecular Drug Research (BMWZ), Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany
| | - Markus Kalesse
- Institute for Organic Chemistry, Gottfried Wilhelm Leibniz Universität Hannover, 30167, Hannover, Germany.,Centre of Biomolecular Drug Research (BMWZ), Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany.,Helmholtz Centre for Infection Research (HZI), Inhoffenstrasse 7, 38124, Braunschweig, Germany
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24
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Tian Y, Wang J, Liu W, Yuan X, Tang Y, Li J, Chen Y, Zhang W. Stereodivergent total synthesis of Br-nannocystins underpinning the polyketide (10R,11S) configuration as a key determinant of potency. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.12.107] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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25
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Gao S, Chen J, Chen M. ( Z)-α-Boryl-crotylboron reagents via Z-selective alkene isomerization and application to stereoselective syntheses of ( E)-δ-boryl- syn-homoallylic alcohols. Chem Sci 2019; 10:3637-3642. [PMID: 30996958 PMCID: PMC6432281 DOI: 10.1039/c9sc00226j] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 02/03/2019] [Indexed: 11/21/2022] Open
Abstract
Stereoselective synthesis of (Z)-α-boryl-crotylboronate is developed. Ni-catalyzed Z-selective alkene isomerization of α-boryl substituted homoallylboronate provided the targeted (Z)-crotylboronate with high selectivity. Stereoselective addition of the novel crotylboron reagent to aldehydes gave (E)-δ-boryl-substituted syn-homoallylic alcohols with excellent diastereoselectivities. The vinyl boronate unit in the products can be directly used for a subsequent C-C bond-forming transformation as illustrated in the synthesis of the C1-7 fragment of the natural products nannocystin A and nannocystin Ax.
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Affiliation(s)
- Shang Gao
- Department of Chemistry and Biochemistry , Auburn University , Auburn , AL 36849 , USA .
| | - Jichao Chen
- Department of Chemistry and Biochemistry , Auburn University , Auburn , AL 36849 , USA .
| | - Ming Chen
- Department of Chemistry and Biochemistry , Auburn University , Auburn , AL 36849 , USA .
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26
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27
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De Leon Rodriguez LM, Williams ET, Brimble MA. Chemical Synthesis of Bioactive Naturally Derived Cyclic Peptides Containing Ene‐Like Rigidifying Motifs. Chemistry 2018; 24:17869-17880. [DOI: 10.1002/chem.201802533] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Indexed: 12/12/2022]
Affiliation(s)
| | - Elyse T. Williams
- School of Chemical SciencesThe University of Auckland 23 Symonds St. Auckland 1142 New Zealand
| | - Margaret A. Brimble
- School of Biological SciencesThe University of Auckland 3 Symonds St. Auckland 1142 New Zealand
- School of Chemical SciencesThe University of Auckland 23 Symonds St. Auckland 1142 New Zealand
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28
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Abstract
The first total synthesis of pericoannosin A (1) containing 15 steps in the longest linear sequence with an overall yield of 5.5% is reported. The hybrid peptide-polyketide was isolated from the endophytic fungus Periconia sp. F-31 and bears a unique tricyclic core structure. The key steps are a glycolate aldol reaction and a Diels-Alder reaction utilizing an Evans auxiliary for controlling the stereochemistry. Furthermore, a late-stage equilibration was employed.
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Affiliation(s)
- Daniel Lücke
- Institute for Organic Chemistry and Centre of Biomolecular Drug Research (BMWZ), Leibniz Universität Hannover , Schneiderberg 1B , D-30167 Hannover , Germany
| | - Yannick Linne
- Institute for Organic Chemistry and Centre of Biomolecular Drug Research (BMWZ), Leibniz Universität Hannover , Schneiderberg 1B , D-30167 Hannover , Germany
| | - Katharina Hempel
- Institute for Organic Chemistry and Centre of Biomolecular Drug Research (BMWZ), Leibniz Universität Hannover , Schneiderberg 1B , D-30167 Hannover , Germany
| | - Markus Kalesse
- Institute for Organic Chemistry and Centre of Biomolecular Drug Research (BMWZ), Leibniz Universität Hannover , Schneiderberg 1B , D-30167 Hannover , Germany.,Helmholtz Centre for Infection Research (HZI) , Inhoffenstrasse 7 , D-38124 Braunschweig , Germany
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29
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Total synthesis and biological evaluation of nannocystin analogues modified at the polyketide phenyl moiety. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.07.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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30
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Albericio F, El-Faham A. Choosing the Right Coupling Reagent for Peptides: A Twenty-Five-Year Journey. Org Process Res Dev 2018. [DOI: 10.1021/acs.oprd.8b00159] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Fernando Albericio
- School of Chemistry and Physics, University of KwaZulu-Natal, University Road,
Westville, Durban 4001, South Africa
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
- Department of Organic Chemistry, University of Barcelona, Martí i Franqués 1-11, Barcelona 08028, Spain
- CIBER-BBN, Networking Centre on Bioengineering, Biomaterials and Nanomedicine, Barcelona Science Park, Baldiri Reixac 10, Barcelona 08028, Spain
| | - Ayman El-Faham
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
- Department of Chemistry, Faculty of Science, Alexandria University, P.O. Box 426,
Ibrahimia, Alexandria 21321, Egypt
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31
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Tian Y, Xu X, Ding Y, Hao X, Bai Y, Tang Y, Zhang X, Li Q, Yang Z, Zhang W, Chen Y. Synthesis and biological evaluation of nannocystin analogues toward understanding the binding role of the (2R,3S)-Epoxide in nannocystin A. Eur J Med Chem 2018; 150:626-632. [DOI: 10.1016/j.ejmech.2018.03.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 03/01/2018] [Accepted: 03/02/2018] [Indexed: 11/29/2022]
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32
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Surup F, Kuhnert E, Böhm A, Pendzialek T, Solga D, Wiebach V, Engler H, Berkessel A, Stadler M, Kalesse M. The Rickiols: 20-, 22-, and 24-membered Macrolides from the Ascomycete Hypoxylon rickii. Chemistry 2018; 24:2200-2213. [PMID: 29168908 DOI: 10.1002/chem.201704928] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Indexed: 11/10/2022]
Abstract
In preceding studies the neotropical ascomycete Hypoxylon rickii turned out to be a prolific source of new secondary metabolites, considering that we had obtained terpenoids with five different scaffolds along with a series of terphenyls. From the mycelial extracts of a 70 L scale fermentation of this strain we additionally isolated nine new macrolides (1-9) by RP-HPLC. The planar structures were elucidated by NMR spectroscopy complemented by HR-ESIMS. The relative configurations were assigned by J-based configuration analyses and confirmed by Kishi's Universal Database. Subsequently, the absolute configurations were assigned by Mosher's method using the shift analysis of a tetra-MTPA derivative. For rickiol A (1) and E (5) we observed transesterification of 20-membered ring structures to 22-membered isomers rickiol A2 (6) and E2 (7), and to 24-membered isomers rickiol A3 (8) and rickiol E3 (9), respectively. Cytotoxic effects and moderate antibiotic activity against Gram-positive bacteria were observed for 1-8 and 1-6 and 8, respectively. The total synthesis of rickiol E3 (9) established easier access to these compounds.
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Affiliation(s)
- Frank Surup
- Microbial Drugs, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstraße 7, 38124, Braunschweig, Germany.,Partner site Hannover-Braunschweig, German Centre for Infection Research Association (DZIF), Inhoffenstraße 7, 38124, Braunschweig, Germany
| | - Eric Kuhnert
- Microbial Drugs, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstraße 7, 38124, Braunschweig, Germany
| | - Andreas Böhm
- Institute for Organic Chemistry, Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany.,Drug Research (BMWZ), Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany
| | - Tim Pendzialek
- Institute for Organic Chemistry, Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany.,Drug Research (BMWZ), Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany
| | - Danny Solga
- Institute for Organic Chemistry, Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany.,Drug Research (BMWZ), Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany
| | - Vincent Wiebach
- Microbial Drugs, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstraße 7, 38124, Braunschweig, Germany.,Institut für Chemie, Technische Universität Berlin, Müller-Breslau-Straße 10, 10623, Berlin, Germany
| | - Hauke Engler
- Department of Chemistry, Organic Chemistry, Cologne University, Greinstraße 4, 50939, Cologne, Germany
| | - Albrecht Berkessel
- Department of Chemistry, Organic Chemistry, Cologne University, Greinstraße 4, 50939, Cologne, Germany
| | - Marc Stadler
- Microbial Drugs, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstraße 7, 38124, Braunschweig, Germany.,Partner site Hannover-Braunschweig, German Centre for Infection Research Association (DZIF), Inhoffenstraße 7, 38124, Braunschweig, Germany
| | - Markus Kalesse
- Institute for Organic Chemistry, Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany.,Drug Research (BMWZ), Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany.,Medicinal Chemistry, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstraße 7, 38124, Braunschweig, Germany
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34
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Meng Z, Souillart L, Monks B, Huwyler N, Herrmann J, Müller R, Fürstner A. A “Motif-Oriented” Total Synthesis of Nannocystin Ax. Preparation and Biological Assessment of Analogues. J Org Chem 2017; 83:6977-6994. [DOI: 10.1021/acs.joc.7b02871] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhanchao Meng
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
| | | | - Brendan Monks
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
| | - Nikolas Huwyler
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
| | - Jennifer Herrmann
- Helmholtz Institute for Pharmaceutical Research Saarland, Saarland University, 66123 Saarbrücken, Germany
| | - Rolf Müller
- Helmholtz Institute for Pharmaceutical Research Saarland, Saarland University, 66123 Saarbrücken, Germany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
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35
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Peňaška T, Koukal P, Kotora M. Enantioselective Synthesis of the C23-C33 Fragment of Aetheramide A and Its C32 Epimer. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701416] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Tibor Peňaška
- Department of Organic Chemistry; Faculty of Science; Charles University; Hlavova 8 12843 Praha 2 Czech Republic
| | - Petr Koukal
- Department of Organic Chemistry; Faculty of Science; Charles University; Hlavova 8 12843 Praha 2 Czech Republic
| | - Martin Kotora
- Department of Organic Chemistry; Faculty of Science; Charles University; Hlavova 8 12843 Praha 2 Czech Republic
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