51
|
Huck CJ, Boyko YD, Sarlah D. Total Synthesis of Stelletins through an Unconventional Annulation Strategy. Acc Chem Res 2021; 54:1597-1609. [PMID: 33635622 DOI: 10.1021/acs.accounts.0c00840] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Marine ecosystems present the largest source of biodiversity on the planet and an immense reservoir of novel chemical entities. Sessile marine organisms such as sponges produce a wide range of complex secondary metabolites, many of these with potent biological activity engineered for chemical defense. That such compounds exert dynamic effects outside of their native context is perhaps not surprising, and the realm of marine natural products has attracted considerable attention as a largely untapped repository of potential candidates for drug development. Only a handful of the more than 15 000 marine natural products that have been isolated to date have advanced to the clinic, and more are to be expected. The rich chemical information encoded in the intricate three-dimensional structures of many marine natural products facilitates highly discriminating interactions with cell signaling pathways, and especially within cancer cells such nuanced effects offer an exciting opportunity for the development of targeted therapies that lack the side effects and general toxicity of conventional chemotherapeutics. The isomalabaricanes are a rare class of marine triterpenoids that have been hailed as promising cytotoxic lead compounds for the treatment of cancer, and they have attracted a flurry of excitement from researchers because of their potent cytotoxicity in certain human cancer cell lines along with a range of other antineoplastic effects. Most notably, their inhibitory activity is highly cell-selective, characterized by large deviations from their mean GI50 concentrations across 3 orders of magnitude in the NCI-60 Human Tumor Cell Lines screen, suggesting mechanistic specificity rather than general and unbridled toxicity. Despite these auspicious preliminary reports, the isomalabaricane scaffold remains largely unexplored as a potential anticancer lead because of lack of material. This Account describes our recent efforts to develop a general, modular synthesis of the isomalabaricanes, as exemplified by the successful total syntheses of rhabdastrellic acid A, stelletin E, and stelletin A. The unorthodox trans-syn-trans configuration of their perhydrobenz[e]indene core severely circumscribes the synthetic methods available for its construction and required several generations of strategy to assemble. Ultimately, a series of unconventional transformations were identified that were capable of building this highly strained motif, and the syntheses of rhabdastrellic acid A and stelletin E were completed in racemic fashion. Subsequently, a second-generation approach to these natural products was developed, rendering the synthesis enantioselective as well as providing access to stelletin A. These synthetic efforts were greatly assisted by computational techniques such as 13C NMR prediction, which enabled structural assignments of hydrocarbon diastereomers, as well as relaxed surface scan conformational analysis, which informed a campaign for directed hydrogenation of an alkene. High-throughput experimentation methods were brought to bear during optimization of a late-stage Suzuki coupling on stelletin A. Finally, preliminary structure-activity relationship studies in glioblastoma and nonsmall cell lung cancer cell lines were conducted on stelletin A, revealing that the singular trans-syn-trans perhydrobenz[e]indene core is essential for the cytotoxic activity of the isomalabaricane triterpenoids.
Collapse
Affiliation(s)
- Christopher J. Huck
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Cancer Center at Illinois, University of Illinois, Urbana, Illinois 61801, United States
| | - Yaroslav D. Boyko
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Cancer Center at Illinois, University of Illinois, Urbana, Illinois 61801, United States
| | - David Sarlah
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Cancer Center at Illinois, University of Illinois, Urbana, Illinois 61801, United States
| |
Collapse
|
52
|
Tresse C, François-Heude M, Servajean V, Ravinder R, Lesieur C, Geiben L, Jeanne-Julien L, Steinmetz V, Retailleau P, Roulland E, Beau JM, Norsikian S. Total Synthesis of Tiacumicin B: Study of the Challenging β-Selective Glycosylations*. Chemistry 2021; 27:5230-5239. [PMID: 33433914 DOI: 10.1002/chem.202005102] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Indexed: 11/07/2022]
Abstract
We give a full account of the total synthesis of tiacumicin B (Tcn-B), a natural glycosylated macrolide with remarkable antibiotic properties. Our strategy is based on our experience with the synthesis of the tiacumicin B aglycone and on unique 1,2-cis-glycosylation steps. We used sulfoxide anomeric leaving-groups in combination with a remote 3-O-picoloyl group on the donors that allowed highly β-selective rhamnosylation and noviosylation that rely on H-bond-mediated aglycone delivery. The rhamnosylated C1-C3 fragment was anchored to the C4-C19 aglycone fragment by a Suzuki-Miyaura cross-coupling. Ring-size-selective Shiina macrolactonization provided a semiglycosylated aglycone that was engaged directly in the noviolysation step with a virtually total β-selectivity. Finally, a novel deprotection method was devised for the removal of a 2-naphthylmethyl ether on a phenol, and efficient removal of all the protecting groups provided synthetic tiacumicin B.
Collapse
Affiliation(s)
- Cédric Tresse
- Institut de Chimie des Substances Naturelles, UPR 2301, CNRS Université Paris-Saclay, 91198, Gif-sur-Yvette, France
| | - Marc François-Heude
- Institut de Chimie des Substances Naturelles, UPR 2301, CNRS Université Paris-Saclay, 91198, Gif-sur-Yvette, France
| | - Vincent Servajean
- Institut de Chimie des Substances Naturelles, UPR 2301, CNRS Université Paris-Saclay, 91198, Gif-sur-Yvette, France
| | - Rubal Ravinder
- Institut de Chimie des Substances Naturelles, UPR 2301, CNRS Université Paris-Saclay, 91198, Gif-sur-Yvette, France
| | - Clémence Lesieur
- Institut de Chimie des Substances Naturelles, UPR 2301, CNRS Université Paris-Saclay, 91198, Gif-sur-Yvette, France
| | - Lucie Geiben
- Institut de Chimie des Substances Naturelles, UPR 2301, CNRS Université Paris-Saclay, 91198, Gif-sur-Yvette, France
| | - Louis Jeanne-Julien
- C-Tac, CitCom, UMR 8038, Faculté de Pharmacie, CNRS-Université de Paris, avenue de l'Observatoire 4, 75006, Paris, France
| | - Vincent Steinmetz
- Institut de Chimie des Substances Naturelles, UPR 2301, CNRS Université Paris-Saclay, 91198, Gif-sur-Yvette, France
| | - Pascal Retailleau
- Institut de Chimie des Substances Naturelles, UPR 2301, CNRS Université Paris-Saclay, 91198, Gif-sur-Yvette, France
| | - Emmanuel Roulland
- C-Tac, CitCom, UMR 8038, Faculté de Pharmacie, CNRS-Université de Paris, avenue de l'Observatoire 4, 75006, Paris, France
| | - Jean-Marie Beau
- Institut de Chimie des Substances Naturelles, UPR 2301, CNRS Université Paris-Saclay, 91198, Gif-sur-Yvette, France.,Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), UMR 8182, Univ. Paris-Sud and CNRS, Université Paris-Saclay, 91405, Orsay, France
| | - Stéphanie Norsikian
- Institut de Chimie des Substances Naturelles, UPR 2301, CNRS Université Paris-Saclay, 91198, Gif-sur-Yvette, France
| |
Collapse
|
53
|
Nicolaou KC, Pan S, Pulukuri KK, Ye Q, Rigol S, Erande RD, Vourloumis D, Nocek BP, Munneke S, Lyssikatos J, Valdiosera A, Gu C, Lin B, Sarvaiaya H, Trinidad J, Sandoval J, Lee C, Hammond M, Aujay M, Taylor N, Pysz M, Purcell JW, Gavrilyuk J. Design, Synthesis, and Biological Evaluation of Tubulysin Analogues, Linker-Drugs, and Antibody-Drug Conjugates, Insights into Structure-Activity Relationships, and Tubulysin-Tubulin Binding Derived from X-ray Crystallographic Analysis. J Org Chem 2021; 86:3377-3421. [PMID: 33544599 DOI: 10.1021/acs.joc.0c02755] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Molecular design, synthesis, and biological evaluation of tubulysin analogues, linker-drugs, and antibody-drug conjugates are described. Among the new discoveries reported is the identification of new potent analogues within the tubulysin family that carry a C11 alkyl ether substituent, rather than the usual ester structural motif at that position, a fact that endows the former with higher plasma stability than that of the latter. Also described herein are X-ray crystallographic analysis studies of two tubulin-tubulysin complexes formed within the α/β interface between two tubulin heterodimers and two highly potent tubulysin analogues, one of which exhibited a different binding mode to the one previously reported for tubulysin M. The X-ray crystallographic analysis-derived new insights into the binding modes of these tubulysin analogues explain their potencies and provide inspiration for further design, synthesis, and biological investigations within this class of antitumor agents. A number of these analogues were conjugated as payloads with appropriate linkers at different sites allowing their attachment onto targeting antibodies for cancer therapies. A number of such antibody-drug conjugates were constructed and tested, both in vivo and in vitro, leading to the identification of at least one promising ADC (Herceptin-LD3), warranting further investigations.
Collapse
Affiliation(s)
- K C Nicolaou
- Department of Chemistry, BioScience Research Collaborative, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Saiyong Pan
- Department of Chemistry, BioScience Research Collaborative, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Kiran K Pulukuri
- Department of Chemistry, BioScience Research Collaborative, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Qiuji Ye
- Department of Chemistry, BioScience Research Collaborative, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Stephan Rigol
- Department of Chemistry, BioScience Research Collaborative, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Rohan D Erande
- Department of Chemistry, BioScience Research Collaborative, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Dionisios Vourloumis
- Department of Chemistry, BioScience Research Collaborative, Rice University, 6100 Main Street, Houston, Texas 77005, United States.,Laboratory of Chemical Biology of Natural Products & Designed Molecules, Institute of Nanoscience and Nanotechnology, National Centre for Scientific Research "Demokritos", Agia Paraskevi 153 10, Greece
| | - Bogusław P Nocek
- AbbVie Inc., Research & Development, 1 North Waukegan Road, North Chicago, Illinois 60064, United States
| | - Stefan Munneke
- AbbVie Inc., 400 East Jamie Court, South San Francisco, California 94080, United States
| | - Joseph Lyssikatos
- AbbVie Inc., 400 East Jamie Court, South San Francisco, California 94080, United States
| | - Amanda Valdiosera
- AbbVie Inc., 400 East Jamie Court, South San Francisco, California 94080, United States
| | - Christine Gu
- AbbVie Inc., 400 East Jamie Court, South San Francisco, California 94080, United States
| | - Baiwei Lin
- AbbVie Inc., 400 East Jamie Court, South San Francisco, California 94080, United States
| | - Hetal Sarvaiaya
- AbbVie Inc., 400 East Jamie Court, South San Francisco, California 94080, United States
| | - Jose Trinidad
- AbbVie Inc., 400 East Jamie Court, South San Francisco, California 94080, United States
| | - Joseph Sandoval
- AbbVie Inc., 400 East Jamie Court, South San Francisco, California 94080, United States
| | - Christina Lee
- AbbVie Inc., 400 East Jamie Court, South San Francisco, California 94080, United States
| | - Mikhail Hammond
- AbbVie Inc., 400 East Jamie Court, South San Francisco, California 94080, United States
| | - Monette Aujay
- AbbVie Inc., 400 East Jamie Court, South San Francisco, California 94080, United States
| | - Nicole Taylor
- AbbVie Inc., 400 East Jamie Court, South San Francisco, California 94080, United States
| | - Marybeth Pysz
- AbbVie Inc., 400 East Jamie Court, South San Francisco, California 94080, United States
| | - James W Purcell
- AbbVie Inc., 400 East Jamie Court, South San Francisco, California 94080, United States
| | - Julia Gavrilyuk
- AbbVie Inc., 400 East Jamie Court, South San Francisco, California 94080, United States
| |
Collapse
|
54
|
Boyko YD, Huck CJ, Ning S, Shved AS, Yang C, Chu T, Tonogai EJ, Hergenrother PJ, Sarlah D. Synthetic Studies on Selective, Proapoptotic Isomalabaricane Triterpenoids Aided by Computational Techniques. J Am Chem Soc 2021; 143:2138-2155. [DOI: 10.1021/jacs.0c12569] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Yaroslav D. Boyko
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Cancer Center at Illinois, University of Illinois, Urbana, Illinois 61801, United States
| | - Christopher J. Huck
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Cancer Center at Illinois, University of Illinois, Urbana, Illinois 61801, United States
| | - Shang Ning
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - Alexander S. Shved
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Cancer Center at Illinois, University of Illinois, Urbana, Illinois 61801, United States
| | - Cheng Yang
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - Tiffany Chu
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - Emily J. Tonogai
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Cancer Center at Illinois, University of Illinois, Urbana, Illinois 61801, United States
- Carl R. Woese Institute for Genomic Biology, University of Illinois, Urbana, Illinois 61801, United States
| | - Paul J. Hergenrother
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Cancer Center at Illinois, University of Illinois, Urbana, Illinois 61801, United States
- Carl R. Woese Institute for Genomic Biology, University of Illinois, Urbana, Illinois 61801, United States
| | - David Sarlah
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
- Cancer Center at Illinois, University of Illinois, Urbana, Illinois 61801, United States
| |
Collapse
|
55
|
Kratena N, Gökler T, Maltrovsky L, Oburger E, Stanetty C. A Unified Approach to Phytosiderophore Natural Products. Chemistry 2021; 27:577-580. [PMID: 32897577 PMCID: PMC7821100 DOI: 10.1002/chem.202004004] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Indexed: 11/10/2022]
Abstract
This work reports on the concise total synthesis of eight natural products of the mugineic acid and avenic acid families (phytosiderophores). An innovative "east-to-west" assembly of the trimeric products resulted in a high degree of divergence enabling the formation of the final products in just 10 or 11 steps each with a minimum of overall synthetic effort. Chiral pool starting materials (l-malic acid, threonines) were employed for the outer building blocks while the middle building blocks were accessed by diastereo- and enantioselective methods. A highlight of this work consists in the straightforward preparation of epimeric hydroxyazetidine amino acids, useful building blocks on their own, enabling the first synthesis of 3''-hydroxymugineic acid and 3''-hydroxy-2'-deoxymugineic acid.
Collapse
Affiliation(s)
- Nicolas Kratena
- Institute of Applied Synthetic ChemistryTU WienGetreidemarkt 91060ViennaAustria
| | - Tobias Gökler
- Institute of Applied Synthetic ChemistryTU WienGetreidemarkt 91060ViennaAustria
| | - Lara Maltrovsky
- Institute of Applied Synthetic ChemistryTU WienGetreidemarkt 91060ViennaAustria
| | - Eva Oburger
- Institute of Soil ResearchBOKU ViennaKonrad-Lorenz-Strasse 243430TullnAustria
| | - Christian Stanetty
- Institute of Applied Synthetic ChemistryTU WienGetreidemarkt 91060ViennaAustria
| |
Collapse
|
56
|
Dramatic influence of ester steric hindrance on the diastereoselectivity of a Michael addition towards the synthesis of the ABC tricycle of hexacyclinic acid. Tetrahedron 2021. [DOI: 10.1016/j.tet.2020.131843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
57
|
Lin S, Liu H, Svenningsen EB, Wollesen M, Jacobsen KM, Andersen FD, Moyano-Villameriel J, Pedersen CN, Nørby P, Tørring T, Poulsen TB. Expanding the antibacterial selectivity of polyether ionophore antibiotics through diversity-focused semisynthesis. Nat Chem 2020; 13:47-55. [PMID: 33353970 PMCID: PMC7610524 DOI: 10.1038/s41557-020-00601-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2019] [Accepted: 11/05/2020] [Indexed: 12/13/2022]
Abstract
Polyether ionophores are complex natural products capable of transporting cations across biological membranes. Many polyether ionophores possess potent antimicrobial activity and a few selected compounds have ability to target aggressive cancer cells. Nevertheless, ionophore function is believed to be associated with idiosyncratic cellu-lar toxicity and, consequently, human clinical development has not been pursued. Here, we demonstrate that structurally novel polyether ionophores can be efficiently constructed by recycling components of highly abundant polyethers to afford analogues with enhanced anti-bacterial selectivity compared to a panel of natural polyether ionophores. We used classic degradation reactions of the natural polyethers lasalocid and monensin and combined the resulting fragments with building blocks provided by total synthesis, including halogen-functionalized tetronic acids as cation-binding groups. Our results suggest that structural optimization of polyether ionophores is possible and that this area represents a potential opportunity for future methodological innovation.
Collapse
Affiliation(s)
- Shaoquan Lin
- Department of Chemistry, Aarhus University, Aarhus, Denmark
| | - Han Liu
- Department of Chemistry, Aarhus University, Aarhus, Denmark
| | | | | | | | - Frederikke D Andersen
- Department of Engineering-Microbial Biosynthesis, Aarhus University, Aarhus, Denmark
| | | | | | - Peter Nørby
- Department of Chemistry, Aarhus University, Aarhus, Denmark
| | - Thomas Tørring
- Department of Engineering-Microbial Biosynthesis, Aarhus University, Aarhus, Denmark
| | | |
Collapse
|
58
|
Lowell JA, Dikici E, Joshi PM, Landgraf R, Lemmon VP, Daunert S, Izenwasser S, Daftarian P. Vaccination against cocaine using a modifiable dendrimer nanoparticle platform. Vaccine 2020; 38:7989-7997. [PMID: 33158592 DOI: 10.1016/j.vaccine.2020.10.041] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 09/29/2020] [Accepted: 10/12/2020] [Indexed: 10/23/2022]
Abstract
Pharmacological therapies for the treatment of cocaine addiction have had disappointing efficacy, and the lack of recent developments in the clinical care of cocaine-addicted patients indicates a need for novel treatment strategies. Recent studies have shown that vaccination against cocaine to elicit production of antibodies that reduce concentrations of free drug in the blood is a promising method to protect against the effects of cocaine and reduce rates of relapse. However, the poorly immunogenic nature of cocaine remains a major hurdle to active immunization. Therefore, we hypothesized that strategies to increase targeted exposure of cocaine to the immune system may produce a more effective vaccine. To specifically direct an immune response against cocaine, in the present study we have conjugated a cocaine analog to a dendrimer-based nanoparticle carrier with MHC II-binding moieties that previously has been shown to activate antigen-presenting cells necessary for antibody production. This strategy produced a rapid, prolonged, and high affinity anti-cocaine antibody response without the need for an adjuvant. Surprisingly, additional evaluation using multiple adjuvant formulations in two strains of inbred mice found adjuvants were either functionally redundant or deleterious in the vaccination against cocaine using this platform. The use of conditioned place preference in rats after administration of this vaccine provided proof of concept for the ability of this vaccine to diminish cocaine reward. Together these data demonstrate the intrinsic efficacy of an immune-targeting dendrimer-based cocaine vaccine, with a vast potential for design of future vaccines against other poorly immunogenic antigens by substitution of the conjugated cargo.
Collapse
Affiliation(s)
- Jeffrey A Lowell
- Miami Project to Cure Paralysis, University of Miami, 1095 NW 14th Terrace, Miami, FL 33136, United States
| | - Emre Dikici
- Department of Biochemistry and Molecular Biology, University of Miami, 1011 NW 15th Street, Miami, FL 33136, United States; Dr. JT Macdonald Foundation Biomedical Nanotechnology Institute, University of Miami, Life Science and Technology Park, 1951 Northwest 7th Avenue, Miami, FL 33136, United States
| | - Pratibha M Joshi
- Department of Biochemistry and Molecular Biology, University of Miami, 1011 NW 15th Street, Miami, FL 33136, United States; Dr. JT Macdonald Foundation Biomedical Nanotechnology Institute, University of Miami, Life Science and Technology Park, 1951 Northwest 7th Avenue, Miami, FL 33136, United States
| | - Ralf Landgraf
- Department of Biochemistry and Molecular Biology, University of Miami, 1011 NW 15th Street, Miami, FL 33136, United States
| | - Vance P Lemmon
- Miami Project to Cure Paralysis, University of Miami, 1095 NW 14th Terrace, Miami, FL 33136, United States; Department of Neurological Surgery, University of Miami, 1095 NW 14th Terrace, Miami, FL 33136, United States
| | - Sylvia Daunert
- Department of Biochemistry and Molecular Biology, University of Miami, 1011 NW 15th Street, Miami, FL 33136, United States; Dr. JT Macdonald Foundation Biomedical Nanotechnology Institute, University of Miami, Life Science and Technology Park, 1951 Northwest 7th Avenue, Miami, FL 33136, United States; Miami Clinical and Translational Science Institute, University of Miami, Clinical Research Building, 1120 NW 14th St., Miami, FL 33136, United States
| | - Sari Izenwasser
- Department of Psychiatry and Behavioral Sciences, University of Miami, 1600 NW 10(th) Avenue, Miami, FL 33136, United States.
| | - Pirouz Daftarian
- Department of Biochemistry and Molecular Biology, University of Miami, 1011 NW 15th Street, Miami, FL 33136, United States; Dr. JT Macdonald Foundation Biomedical Nanotechnology Institute, University of Miami, Life Science and Technology Park, 1951 Northwest 7th Avenue, Miami, FL 33136, United States.
| |
Collapse
|
59
|
Mohri T, Takahashi Y, Kwon E, Kuwahara S, Ogura Y. Stereocontrolled Total Synthesis of (-)-Isocelorbicol and Its Elaboration to Natural Dihydro-β-agarofuran Esters. Org Lett 2020; 22:9234-9238. [PMID: 33226244 DOI: 10.1021/acs.orglett.0c03419] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The first total synthesis of four naturally occurring dihydro-β-agarofuran esters has been accomplished via a highly stereocontrolled 14-step access to their common core triol, (-)-isocelorbicol. A semipinacol rearrangement of an epoxy alcohol to install a quaternary carbon, diastereoselective conjugate reduction of a spirocyclic butenolide for the establishment of a methyl-bearing chiral center, and ring-closing metathesis to construct the decalin ring system were exploited as the key steps for the high-yielding synthesis of (-)-isocelorbicol.
Collapse
Affiliation(s)
- Tomoyo Mohri
- Graduate School of Agricultural Science, Tohoku University, Sendai 980-8572, Japan
| | - Yusuke Takahashi
- Graduate School of Agricultural Science, Tohoku University, Sendai 980-8572, Japan
| | - Eunsang Kwon
- Research and Analytical Center for Giant Molecules, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
| | - Shigefumi Kuwahara
- Graduate School of Agricultural Science, Tohoku University, Sendai 980-8572, Japan
| | - Yusuke Ogura
- Graduate School of Agricultural Science, Tohoku University, Sendai 980-8572, Japan.,Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| |
Collapse
|
60
|
Kato T, Strakova K, García-Calvo J, Sakai N, Matile S. Mechanosensitive Fluorescent Probes, Changing Color Like Lobsters during Cooking: Cascade Switching Variations. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2020. [DOI: 10.1246/bcsj.20200157] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Takehiro Kato
- Department of Organic Chemistry, University of Geneva, Geneva, Switzerland
| | - Karolina Strakova
- Department of Organic Chemistry, University of Geneva, Geneva, Switzerland
| | - José García-Calvo
- Department of Organic Chemistry, University of Geneva, Geneva, Switzerland
| | - Naomi Sakai
- Department of Organic Chemistry, University of Geneva, Geneva, Switzerland
| | - Stefan Matile
- Department of Organic Chemistry, University of Geneva, Geneva, Switzerland
| |
Collapse
|
61
|
Pan C, Kuranaga T, Kakeya H. Total synthesis of thioamycolamide A via a biomimetic route. Org Biomol Chem 2020; 18:8366-8370. [PMID: 33030495 DOI: 10.1039/d0ob01942a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2024]
Abstract
Thioamycolamide A is a biosynthetically unique cytotoxic cyclic microbial lipopeptide that bears a d-configured thiazoline, a thioether bridge, a fatty acid side chain, and a reduced C-terminus. Based on the biosynthetic insights, a concise total synthesis of thioamycolamide A was accomplished.
Collapse
Affiliation(s)
- Chengqian Pan
- Department of System Chemotherapy and Molecular Sciences, Division of Bioinformatics and Chemical Genomics, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto 606-8501, Japan.
| | - Takefumi Kuranaga
- Department of System Chemotherapy and Molecular Sciences, Division of Bioinformatics and Chemical Genomics, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto 606-8501, Japan.
| | - Hideaki Kakeya
- Department of System Chemotherapy and Molecular Sciences, Division of Bioinformatics and Chemical Genomics, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto 606-8501, Japan.
| |
Collapse
|
62
|
Watanabe T, Abe H, Shibasaki M. Catalytic Asymmetric Total Synthesis of Leucinostatin A. CHEM REC 2020; 21:175-187. [PMID: 33107684 DOI: 10.1002/tcr.202000108] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 10/05/2020] [Indexed: 12/30/2022]
Abstract
This review describes our efforts toward achieving catalytic asymmetric total synthesis of leucinostatin A, a compound that interferes with the tumor-stroma interaction. The synthesis utilizes four catalytic asymmetric reactions, including direct-type reactions exemplified by high atom-economy, and three C-C bond forming reactions. Thorough analysis of the NMR data, HPLC profiles, and biologic activity led us to unambiguously revise the absolute configuration regarding the 6-position of the AHMOD residue side chain from S (reported) to R. Other examples of previously reported important studies on the stereoselective synthesis of HyLeu and AHMOD are also described.
Collapse
Affiliation(s)
- Takumi Watanabe
- Institute of Microbial Chemistry (BIKAKEN), 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo, 141-0021, Japan
| | - Hikaru Abe
- Institute of Microbial Chemistry (BIKAKEN), 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo, 141-0021, Japan
| | - Masakatsu Shibasaki
- Institute of Microbial Chemistry (BIKAKEN), 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo, 141-0021, Japan
| |
Collapse
|
63
|
Greve E, Lindeman SV, Scartelli C, Lin L, Flaumenhaft R, Dockendorff C. Route exploration and synthesis of the reported pyridone-based PDI inhibitor STK076545. Org Biomol Chem 2020; 18:6665-6681. [PMID: 32812971 DOI: 10.1039/d0ob01205j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The enzyme protein disulfide isomerase (PDI) is essential for the correct folding of proteins and the activation of certain cell surface receptors, and is a promising target for the treatment of cancer and thrombotic conditions. A previous high-throughput screen identified the commercial compound STK076545 as a promising PDI inhibitor. To confirm its activity and support further biological studies, a resynthesis was pursued of the reported β-keto-amide with an N-alkylated pyridone at the α-position. Numerous conventional approaches were complicated by undesired fragmentations or rearrangements. However, a successful 5-step synthetic route was achieved using an aldol reaction with an α-pyridone allyl ester as a key step. An X-ray crystal structure of the final compound confirmed that the reported structure of STK076545 was achieved, however its lack of PDI activity and inconsistent spectral data suggest that the commercial structure was misassigned.
Collapse
Affiliation(s)
- Eric Greve
- Department of Chemistry, Marquette University, P.O. Box 1881, Milwaukee, WI 53201-1881, USA.
| | | | | | | | | | | |
Collapse
|
64
|
Chen QY, Luo D, Seabra GM, Luesch H. Ahp-Cyclodepsipeptides as tunable inhibitors of human neutrophil elastase and kallikrein 7: Total synthesis of tutuilamide A, serine protease selectivity profile and comparison with lyngbyastatin 7. Bioorg Med Chem 2020; 28:115756. [PMID: 33002682 DOI: 10.1016/j.bmc.2020.115756] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 09/01/2020] [Accepted: 09/02/2020] [Indexed: 01/23/2023]
Abstract
We describe the total synthesis of tutuilamide A, a potent porcine pancreatic elastase (PPE) inhibitor and a representative member of the 3-amino-6-hydroxy-2-piperidone (Ahp) cyclodepsipeptide family, isolated from marine cyanobacteria. The Ahp unit serves as a pharmacophore and the adjacent 2-amino-2-butenoic acid (Abu) is a main driver of the selectivity among serine proteases. We adapted our previous convergent strategy to generate the macrocycle, common with lyngbyastatin 7 and related elastase inhibitors, and then appended the tutuilamide A-specific side chain bearing a vinyl chloride. Tutuilamide A and lyngbyastatin 7 were evaluated side by side for the inhibition of the disease-relevant human neutrophil elastase (HNE). Tutuilamide A and lyngbyastatin 7 were approximately equipotent against HNE, while tutuilamide A was previously shown to be more active against PPE compared with lyngbyastatin 7, further demonstrating that the side chain provides opportunities to not only modulate potency but also selectivity among proteases of the same function from different organisms. Profiling of tutuilamide A against mainly human serine proteases revealed high selectivity for HNE (IC50 0.73 nM) and pleiotropic activity against kallikrein 7 (KLK7, IC50 5.0 nM), without affecting other kallikreins, similarly to lyngbyastatin 7 (IC50 0.85 nM for HNE and 3.1 nM for KLK7). A comprehensive molecular docking study for elastases and KLK7 afforded deeper insight into the intricate differences between inhibitor interactions with HNE and PPE, accounting for the differential activities for both compounds. The synthesis and molecular studies serve as a proof-of-concept that the macrocyclic scaffold can be diversified to fine-tune the activity of serine protease inhibitors.
Collapse
Affiliation(s)
- Qi-Yin Chen
- Department of Medicinal Chemistry, University of Florida, Gainesville, FL 32610, United States; Center for Natural Products, Drug Discovery and Development (CNPD3), University of Florida, Gainesville, FL 32610, United States
| | - Danmeng Luo
- Department of Medicinal Chemistry, University of Florida, Gainesville, FL 32610, United States; Center for Natural Products, Drug Discovery and Development (CNPD3), University of Florida, Gainesville, FL 32610, United States
| | - Gustavo M Seabra
- Department of Medicinal Chemistry, University of Florida, Gainesville, FL 32610, United States; Center for Natural Products, Drug Discovery and Development (CNPD3), University of Florida, Gainesville, FL 32610, United States
| | - Hendrik Luesch
- Department of Medicinal Chemistry, University of Florida, Gainesville, FL 32610, United States; Center for Natural Products, Drug Discovery and Development (CNPD3), University of Florida, Gainesville, FL 32610, United States.
| |
Collapse
|
65
|
Grab HA, Kirsch VC, Sieber SA, Bach T. Total Synthesis of the Cyclic Depsipeptide Vioprolide D via its (Z)-Diastereoisomer. Angew Chem Int Ed Engl 2020; 59:12357-12361. [PMID: 32126146 PMCID: PMC7383572 DOI: 10.1002/anie.202002328] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Indexed: 12/15/2022]
Abstract
The first total synthesis of vioprolide D was accomplished in an overall yield of 2.0 % starting from methyl (2S)-3-benzyloxy-2-hydroxypropanoate (16 steps in the longest linear sequence). The cyclic depsipeptide was assembled from two building blocks of similar size and complexity in a modular, highly convergent approach. Peptide bond formation at the C-terminal dehydrobutyrine amino acid of the northern fragment was possible via its (Z)-diastereoisomer. After macrolactamization and formation of the thiazoline ring, the (Z)-double bond of the dehydrobutyrine unit was isomerized to the (E)-double bond of the natural product. The cytotoxicity of vioprolide D is significantly higher than that of its (Z)-diastereoisomer.
Collapse
Affiliation(s)
- Hanusch A. Grab
- Department ChemieTechnische Universität MünchenLichtenbergstrasse 485747GarchingGermany
| | - Volker C. Kirsch
- Department ChemieTechnische Universität MünchenLichtenbergstrasse 485747GarchingGermany
| | - Stephan A. Sieber
- Department ChemieTechnische Universität MünchenLichtenbergstrasse 485747GarchingGermany
| | - Thorsten Bach
- Department ChemieTechnische Universität MünchenLichtenbergstrasse 485747GarchingGermany
| |
Collapse
|
66
|
Trost BM, Wang Y, Buckl AK, Huang Z, Nguyen MH, Kuzmina O. Total synthesis of bryostatin 3. Science 2020; 368:1007-1011. [PMID: 32467391 DOI: 10.1126/science.abb7271] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 04/22/2020] [Indexed: 12/24/2022]
Abstract
Bryostatins are a family of 21 complex marine natural products with a wide range of potent biological activities. Among all the 21 bryostatins, bryostatin 3 is structurally the most complex. Whereas nine total syntheses of bryostatins have been achieved to date, bryostatin 3 has only been targeted once and required the highest number of steps to synthesize (43 steps in the longest linear sequence and 88 total steps). Here, we report a concise total synthesis of bryostatin 3 using 22 steps in the longest linear sequence and 31 total steps through a highly convergent synthetic plan by the use of highly atom-economical and chemoselective transformations in which alkynes played a major role in reducing step count.
Collapse
Affiliation(s)
- Barry M Trost
- Department of Chemistry, Stanford University, Stanford, CA 94305-5080, USA.
| | - Youliang Wang
- Department of Chemistry, Stanford University, Stanford, CA 94305-5080, USA
| | - Andreas K Buckl
- Department of Chemistry, Stanford University, Stanford, CA 94305-5080, USA
| | - Zhongxing Huang
- Department of Chemistry, Stanford University, Stanford, CA 94305-5080, USA
| | - Minh H Nguyen
- Department of Chemistry, Stanford University, Stanford, CA 94305-5080, USA
| | - Olesya Kuzmina
- Department of Chemistry, Stanford University, Stanford, CA 94305-5080, USA
| |
Collapse
|
67
|
Chen D, Po KHL, Blasco P, Chen S, Li X. Convergent Synthesis of Calcium-Dependent Antibiotic CDA3a and Analogues with Improved Antibacterial Activity via Late-Stage Serine Ligation. Org Lett 2020; 22:4749-4753. [PMID: 32484680 DOI: 10.1021/acs.orglett.0c01544] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A convergent synthesis via the late-stage serine ligation of naturally occurring calcium-dependent antibiotic CDA3a and its analogues has been developed, which allowed us to readily synthesize the analogues with the variation on the lipid tail. Some analogues were found to show 100-500-fold higher antimicrobial activity than the natural compound CDA3a against drug resistant bacteria. This study will enhance our understanding of CDA3a and provide valuable antibacterial lead candidates for further development.
Collapse
Affiliation(s)
- Delin Chen
- Department of Chemistry, State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Hong Kong, P. R. China
| | - Kathy Hiu Laam Po
- Department of Infectious Diseases Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, The City University of Hong Kong, Kowloon, Kowloon, Hong Kong, P. R. China
| | - Pilar Blasco
- Department of Chemistry, State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Hong Kong, P. R. China
| | - Sheng Chen
- Department of Infectious Diseases Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, The City University of Hong Kong, Kowloon, Kowloon, Hong Kong, P. R. China
| | - Xuechen Li
- Department of Chemistry, State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Hong Kong, P. R. China
| |
Collapse
|
68
|
Gunasekaran P, Kim EY, Lee J, Ryu EK, Shin SY, Bang JK. Synthesis of Fmoc-Triazine Amino Acids and Its Application in the Synthesis of Short Antibacterial Peptidomimetics. Int J Mol Sci 2020; 21:ijms21103602. [PMID: 32443730 PMCID: PMC7279249 DOI: 10.3390/ijms21103602] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 05/18/2020] [Accepted: 05/18/2020] [Indexed: 12/13/2022] Open
Abstract
To combat the escalating rise of antibacterial resistance, the development of antimicrobial peptides (AMPs) with a unique mode of action is considered an attractive strategy. However, proteolytic degradation of AMPs remains the greatest challenge in their transformation into therapeutics. Herein, we synthesized Fmoc-triazine amino acids that differ from each other by anchoring either cationic or hydrophobic residues. These unnatural amino acids were adopted for solid-phase peptide synthesis (SPPS) to synthesize a series of amphipathic antimicrobial peptidomimetics. From the antimicrobial screening, we found that the trimer, BJK-4 is the most potent short antimicrobial peptidomimetic without showing hemolytic activity and it displayed enhanced proteolytic stability. Moreover, the mechanism of action to kill bacteria was found to be an intracellular targeting.
Collapse
Affiliation(s)
- Pethaiah Gunasekaran
- Division of Magnetic Resonance, Korea Basic Science Institute (KBSI), Ochang 28119, Korea; (P.G.); (J.L.); (E.K.R.)
| | - Eun Young Kim
- Department of Medical Science, Graduate School, Chosun University, Gwangju 61452, Korea; (E.Y.K.); (S.Y.S.)
| | - Jian Lee
- Division of Magnetic Resonance, Korea Basic Science Institute (KBSI), Ochang 28119, Korea; (P.G.); (J.L.); (E.K.R.)
| | - Eun Kyoung Ryu
- Division of Magnetic Resonance, Korea Basic Science Institute (KBSI), Ochang 28119, Korea; (P.G.); (J.L.); (E.K.R.)
- Department of Bio-analytical Science, University of Science & Technology, Daejeon 34113, Korea
| | - Song Yub Shin
- Department of Medical Science, Graduate School, Chosun University, Gwangju 61452, Korea; (E.Y.K.); (S.Y.S.)
- Department of Cellular and Molecular Medicine, School of Medicine, Chosun University, Gwangju 61452, Korea
| | - Jeong Kyu Bang
- Division of Magnetic Resonance, Korea Basic Science Institute (KBSI), Ochang 28119, Korea; (P.G.); (J.L.); (E.K.R.)
- Department of Bio-analytical Science, University of Science & Technology, Daejeon 34113, Korea
- Correspondence: ; Tel.: +82-43-240-5023
| |
Collapse
|
69
|
Novel pyridone EP 4 agonists featuring allylic alcohol ω-chains. Bioorg Med Chem Lett 2020; 30:127104. [PMID: 32201020 DOI: 10.1016/j.bmcl.2020.127104] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 03/05/2020] [Accepted: 03/08/2020] [Indexed: 10/24/2022]
Abstract
Novel prostaglandin E2 receptor 4 (EP4) agonists featuring a pyridone core and an allylic alcohol ω-chain were discovered. These agonists were shown to be selective over EP1, EP2 and EP3. Analogs harboring a 4-carboxylic acid phenethyl α-chain displayed improved potency over those containing an n-heptanoic acid chain. Key SAR relationships were also identified.
Collapse
|
70
|
Zhao M, Xiao Y, Otsuka S, Nakao Y, Guo Y, Ye T. Total Synthesis and Biological Evaluation of Kakeromamide A and Its Analogues. Front Chem 2020; 8:410. [PMID: 32478037 PMCID: PMC7237762 DOI: 10.3389/fchem.2020.00410] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 04/20/2020] [Indexed: 12/12/2022] Open
Abstract
Kakeromamide A (1), the first marine cyclopeptide inducing neural stem cells differentiation into astrocytes, was synthesized in 12 longest linear steps and 14% overall yield. Using this synthetic approach, four analogs of kakeromamide A were prepared and evaluated for neural differentiation- modulating activity.
Collapse
Affiliation(s)
- Meng Zhao
- State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen, China
| | - Yi Xiao
- State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen, China
| | - Satoshi Otsuka
- Research Institute for Science and Engineering, Waseda University, Tokyo, Japan
| | - Yoichi Nakao
- Research Institute for Science and Engineering, Waseda University, Tokyo, Japan.,Department of Chemistry and Biochemistry, Graduate School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
| | - Yian Guo
- State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen, China
| | - Tao Ye
- State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen, China.,Tsinghua Shenzhen International Graduate School, Xili, Shenzhen, China
| |
Collapse
|
71
|
Syga Ł, de Vries RH, van Oosterhout H, Bartelds R, Boersma AJ, Roelfes G, Poolman B. A Trifunctional Linker for Palmitoylation and Peptide and Protein Localization in Biological Membranes. Chembiochem 2020; 21:1320-1328. [PMID: 31814256 PMCID: PMC7317724 DOI: 10.1002/cbic.201900655] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Indexed: 01/09/2023]
Abstract
Attachment of lipophilic groups is an important post-translational modification of proteins, which involves the coupling of one or more anchors such as fatty acids, isoprenoids, phospholipids, or glycosylphosphatidyl inositols. To study its impact on the membrane partitioning of hydrophobic peptides or proteins, we designed a tyrosine-based trifunctional linker. The linker allows the facile incorporation of two different functionalities at a cysteine residue in a single step. We determined the effect of the lipid modification on the membrane partitioning of the synthetic α-helical model peptide WALP with or without here and in all cases below; palmitoyl groups in giant unilamellar vesicles that contain a liquid-ordered (Lo ) and liquid-disordered (Ld ) phase. Introduction of two palmitoyl groups did not alter the localization of the membrane peptides, nor did the membrane thickness or lipid composition. In all cases, the peptide was retained in the Ld phase. These data demonstrate that the Lo domain in model membranes is highly unfavorable for a single membrane-spanning peptide.
Collapse
Affiliation(s)
- Łukasz Syga
- Department of BiochemistryGroningen Biomolecular Sciences andBiotechnology Institute and Zernike Institute for Advanced MaterialsUniversity of GroningenNijenborgh 49747 AGGroningenThe Netherlands
| | - Reinder H. de Vries
- Department of Biomolecular Chemistry and CatalysisStratingh Institute for ChemistryUniversity of GroningenNijenborgh 49747 AGGroningenThe Netherlands
| | - Hugo van Oosterhout
- Department of Biomolecular Chemistry and CatalysisStratingh Institute for ChemistryUniversity of GroningenNijenborgh 49747 AGGroningenThe Netherlands
| | - Rianne Bartelds
- Department of BiochemistryGroningen Biomolecular Sciences andBiotechnology Institute and Zernike Institute for Advanced MaterialsUniversity of GroningenNijenborgh 49747 AGGroningenThe Netherlands
| | - Arnold J. Boersma
- DWI Leibniz Institute for Interactive MaterialsForckenbeckstrasse 5052074AachenGermany
| | - Gerard Roelfes
- Department of Biomolecular Chemistry and CatalysisStratingh Institute for ChemistryUniversity of GroningenNijenborgh 49747 AGGroningenThe Netherlands
| | - Bert Poolman
- Department of BiochemistryGroningen Biomolecular Sciences andBiotechnology Institute and Zernike Institute for Advanced MaterialsUniversity of GroningenNijenborgh 49747 AGGroningenThe Netherlands
| |
Collapse
|
72
|
Grab HA, Kirsch VC, Sieber SA, Bach T. Totalsynthese des cyclischen Depsipeptids Vioprolid D über sein (
Z
)‐Diastereomer. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202002328] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hanusch A. Grab
- Department Chemie Technische Universität München Lichtenbergstrasse 4 85747 Garching Deutschland
| | - Volker C. Kirsch
- Department Chemie Technische Universität München Lichtenbergstrasse 4 85747 Garching Deutschland
| | - Stephan A. Sieber
- Department Chemie Technische Universität München Lichtenbergstrasse 4 85747 Garching Deutschland
| | - Thorsten Bach
- Department Chemie Technische Universität München Lichtenbergstrasse 4 85747 Garching Deutschland
| |
Collapse
|
73
|
|
74
|
Katsuta R, Masada N, Kimura K, Yajima A, Ishigami K, Nukada T. Synthesis and stereochemistry of (−)-FE399. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151783] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
75
|
Ueda H. Synthetic Studies toward Dimeric Indole Alkaloids Based on Convergent Synthetic Strategy. Chem Pharm Bull (Tokyo) 2020; 68:117-128. [PMID: 32009078 DOI: 10.1248/cpb.c19-00706] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The total syntheses of dimeric indole alkaloids, haplophytine, and T988s are described. These dimeric compounds comprising two structurally different indole units are ubiquitous in nature, and many possess pharmaceutically important activities. To realize an efficient chemical synthesis of these dimeric indole alkaloids, the establishment of convergent synthetic strategies and development of new coupling methods are indispensable. The linkage of two highly functionalized units at a late stage of the synthesis frequently induces synthetic problems such as chemoselectivity and steric repulsion. Moreover, although transition metal-catalyzed reactions are usually an effective method for the cross-coupling of two units, the application of these cross-coupling reactions to bond formation involving a sterically hindered C(sp3) is often difficult. Thus, even with precise modern synthetic methods, it is currently difficult to realize convergent syntheses of dimeric indole alkaloids possessing a quaternary carbon linking two units. To combat these synthetic problems, we developed a synthetic method to link two indole units using an Ag-mediated nucleophilic substitution reaction. In this review, we provide a detailed discussion of convergent synthetic strategies and coupling methods for dimeric indole alkaloids.
Collapse
Affiliation(s)
- Hirofumi Ueda
- Graduate School of Pharmaceutical Sciences, Tohoku University
| |
Collapse
|
76
|
Norsikian S, Tresse C, François-Eude M, Jeanne-Julien L, Masson G, Servajean V, Genta-Jouve G, Beau JM, Roulland E. Total Synthesis of Tiacumicin B: Implementing Hydrogen Bond Directed Acceptor Delivery for Highly Selective β-Glycosylations. Angew Chem Int Ed Engl 2020; 59:6612-6616. [PMID: 32003915 DOI: 10.1002/anie.202000231] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Indexed: 02/03/2023]
Abstract
A total synthesis of tiacumicin B, a natural macrolide whose remarkable antibiotic properties are used to treat severe intestinal infections, is reported. The strategy is in part based on the prior synthesis of the tiacumicin B aglycone, and on the decisive use of sulfoxides as anomeric leaving groups in hydrogen-bond-mediated aglycone delivery (HAD). This new HAD variant permitted highly β-selective rhamnosylation and noviosylation. To increase convergence, the rhamnosylated C1-C3 fragment thus obtained was anchored to the C4-C19 aglycone fragment by adapting the Suzuki-Miyaura cross-coupling used for the aglycone synthesis. Ring-size-selective macrolactonization provided a compound engaged directly in the noviolysation step with virtually total β selectivity. The final efficient removal of all the protecting groups provided synthetic tiacumicin B.
Collapse
Affiliation(s)
- Stéphanie Norsikian
- Université Paris-Saclay, Institut de Chimie des Substances Naturelles, UPR 2301, Avenue de la Terrasse, 91198, Gif-sur-Yvette, France
| | - Cedric Tresse
- Université Paris-Saclay, Institut de Chimie des Substances Naturelles, UPR 2301, Avenue de la Terrasse, 91198, Gif-sur-Yvette, France
| | - Marc François-Eude
- Université Paris-Saclay, Institut de Chimie des Substances Naturelles, UPR 2301, Avenue de la Terrasse, 91198, Gif-sur-Yvette, France
| | - Louis Jeanne-Julien
- C-TAC, CitCom, UMR 8038, CNRS-Université de Paris, Faculté de Pharmacie, 4, avenue de l'Observatoire, 75006, Paris, France
| | - Guillaume Masson
- C-TAC, CitCom, UMR 8038, CNRS-Université de Paris, Faculté de Pharmacie, 4, avenue de l'Observatoire, 75006, Paris, France
| | - Vincent Servajean
- Université Paris-Saclay, Institut de Chimie des Substances Naturelles, UPR 2301, Avenue de la Terrasse, 91198, Gif-sur-Yvette, France
| | - Grégory Genta-Jouve
- C-TAC, CitCom, UMR 8038, CNRS-Université de Paris, Faculté de Pharmacie, 4, avenue de l'Observatoire, 75006, Paris, France
| | - Jean-Marie Beau
- Université Paris-Saclay, Institut de Chimie des Substances Naturelles, UPR 2301, Avenue de la Terrasse, 91198, Gif-sur-Yvette, France.,Laboratoire de Synthèse de Biomolécules, ICMMO, UMR 8182, Univ. Paris-Sud and CNRS, Université Paris-Saclay, 91405, Orsay, France
| | - Emmanuel Roulland
- C-TAC, CitCom, UMR 8038, CNRS-Université de Paris, Faculté de Pharmacie, 4, avenue de l'Observatoire, 75006, Paris, France
| |
Collapse
|
77
|
Norsikian S, Tresse C, François‐Eude M, Jeanne‐Julien L, Masson G, Servajean V, Genta‐Jouve G, Beau J, Roulland E. Total Synthesis of Tiacumicin B: Implementing Hydrogen Bond Directed Acceptor Delivery for Highly Selective β‐Glycosylations. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202000231] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Stéphanie Norsikian
- Université Paris-SaclayInstitut de Chimie des Substances Naturelles, UPR 2301 Avenue de la Terrasse 91198 Gif-sur-Yvette France
| | - Cedric Tresse
- Université Paris-SaclayInstitut de Chimie des Substances Naturelles, UPR 2301 Avenue de la Terrasse 91198 Gif-sur-Yvette France
| | - Marc François‐Eude
- Université Paris-SaclayInstitut de Chimie des Substances Naturelles, UPR 2301 Avenue de la Terrasse 91198 Gif-sur-Yvette France
| | - Louis Jeanne‐Julien
- C-TAC, CitCom, UMR 8038CNRS-Université de ParisFaculté de Pharmacie 4, avenue de l'Observatoire 75006 Paris France
| | - Guillaume Masson
- C-TAC, CitCom, UMR 8038CNRS-Université de ParisFaculté de Pharmacie 4, avenue de l'Observatoire 75006 Paris France
| | - Vincent Servajean
- Université Paris-SaclayInstitut de Chimie des Substances Naturelles, UPR 2301 Avenue de la Terrasse 91198 Gif-sur-Yvette France
| | - Grégory Genta‐Jouve
- C-TAC, CitCom, UMR 8038CNRS-Université de ParisFaculté de Pharmacie 4, avenue de l'Observatoire 75006 Paris France
| | - Jean‐Marie Beau
- Université Paris-SaclayInstitut de Chimie des Substances Naturelles, UPR 2301 Avenue de la Terrasse 91198 Gif-sur-Yvette France
- Laboratoire de Synthèse de BiomoléculesICMMO, UMR 8182Univ. Paris-Sud and CNRSUniversité Paris-Saclay 91405 Orsay France
| | - Emmanuel Roulland
- C-TAC, CitCom, UMR 8038CNRS-Université de ParisFaculté de Pharmacie 4, avenue de l'Observatoire 75006 Paris France
| |
Collapse
|
78
|
Schmidt JJ, Khatri Y, Brody SI, Zhu C, Pietraszkiewicz H, Valeriote FA, Sherman DH. A Versatile Chemoenzymatic Synthesis for the Discovery of Potent Cryptophycin Analogs. ACS Chem Biol 2020; 15:524-532. [PMID: 31961651 DOI: 10.1021/acschembio.9b00998] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The cryptophycins are a family of macrocyclic depsipeptide natural products that display exceptionally potent antiproliferative activity against drug-resistant cancers. Unique challenges facing the synthesis and derivatization of this complex group of molecules motivated us to investigate a chemoenzymatic synthesis designed to access new analogs for biological evaluation. The cryptophycin thioesterase (CrpTE) and the cryptophycin epoxidase (CrpE) are a versatile set of enzymes that catalyze macrocyclization and epoxidation of over 20 natural cryptophycin metabolites. Thus, we envisioned a drug development strategy involving their use as standalone biocatalysts for production of unnatural derivatives. Herein, we developed a scalable synthesis of 12 new unit A-B-C-D linear chain elongation intermediates containing heterocyclic aromatic groups as alternatives to the native unit A benzyl group. N-Acetyl cysteamine activated forms of each intermediate were assessed for conversion to macrocyclic products using wild type CrpTE, which demonstrated the exceptional flexibility of this enzyme. Semipreparative scale reactions were conducted for isolation and structural characterization of new cryptophycins. Each was then evaluated as a substrate for CrpE P450 and its ability to generate the epoxidized products from these substrates that possess altered electronics at the unit A styrenyl double bond position. Finally, biological evaluation of the new cryptophycins revealed a des-β-epoxy analog with low picomolar potency, previously limited to cryptophycins bearing epoxide functionality.
Collapse
Affiliation(s)
| | | | | | | | - Halina Pietraszkiewicz
- Department of Internal Medicine, Henry Ford Cancer Institute, Henry Ford Health System, Detroit, Michigan 48202, United States
| | - Frederick A. Valeriote
- Department of Internal Medicine, Henry Ford Cancer Institute, Henry Ford Health System, Detroit, Michigan 48202, United States
| | | |
Collapse
|
79
|
Bader TK, Xu F, Hodny MH, Blank DA, Distefano MD. Methoxy-Substituted Nitrodibenzofuran-Based Protecting Group with an Improved Two-Photon Action Cross-Section for Thiol Protection in Solid Phase Peptide Synthesis. J Org Chem 2020; 85:1614-1625. [PMID: 31891500 DOI: 10.1021/acs.joc.9b02751] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Photoremovable caging groups are useful for biological applications because the deprotection process can be initiated by illumination with light without the necessity of adding additional reagents such as acids or bases that can perturb biological activity. In solid phase peptide synthesis (SPPS), the most common photoremovable group used for thiol protection is the o-nitrobenzyl group and related analogues. In earlier work, we explored the use of the nitrodibenzofuran (NDBF) group for thiol protection and found it to exhibit a faster rate toward UV photolysis relative to simple nitroveratryl-based protecting groups and a useful two-photon cross-section. Here, we describe the synthesis of a new NDBF-based protecting group bearing a methoxy substituent and use it to prepare a protected form of cysteine suitable for SPPS. This reagent was then used to assemble two biologically relevant peptides and characterize their photolysis kinetics in both UV- and two-photon-mediated reactions; a two-photon action cross-section of 0.71-1.4 GM for the new protecting group was particularly notable. Finally, uncaging of these protected peptides by either UV or two-photon activation was used to initiate their subsequent enzymatic processing by the enzyme farnesyltransferase. These experiments highlight the utility of this new protecting group for SPPS and biological experiments.
Collapse
Affiliation(s)
- Taysir K Bader
- Department of Chemistry , University of Minnesota , Minneapolis , Minnesota 55455 , United States
| | - Feng Xu
- Department of Chemistry , University of Minnesota , Minneapolis , Minnesota 55455 , United States
| | - Michael H Hodny
- Department of Chemistry , University of Minnesota , Minneapolis , Minnesota 55455 , United States
| | - David A Blank
- Department of Chemistry , University of Minnesota , Minneapolis , Minnesota 55455 , United States
| | - Mark D Distefano
- Department of Chemistry , University of Minnesota , Minneapolis , Minnesota 55455 , United States
| |
Collapse
|
80
|
Cole CJF, Fuentes L, Snyder SA. Asymmetric pyrone Diels-Alder reactions enabled by dienamine catalysis. Chem Sci 2019; 11:2175-2180. [PMID: 34123308 PMCID: PMC8150114 DOI: 10.1039/c9sc05738b] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Despite the proven value in utilizing pyrone dienes to create molecular complexity via Diels-Alder reactions with varied dienophiles, few examples of effective catalytic, asymmetric variants of this process have been developed. Herein, we show that the use of Jørgensen-Hayashi-type catalysts can convert an array of α,β-unsaturated aldehydes into chiral dienamines that can formally add in a Diels-Alder fashion to a number of electron-deficient pyrones of the coumalate-type to generate optically active [2.2.2]-bicyclic lactones. In most cases, the reactions proceed with good to excellent diastereo- and enantiocontrol (up to 99% ee). Models to explain that stereoselectivity, as well as several additional transformations of the resultant products, are also presented.
Collapse
Affiliation(s)
- Charles J F Cole
- Department of Chemistry, University of Chicago 5735 S. Ellis Avenue Chicago IL 60637 USA
| | - Lilia Fuentes
- Department of Chemistry, University of Chicago 5735 S. Ellis Avenue Chicago IL 60637 USA
| | - Scott A Snyder
- Department of Chemistry, University of Chicago 5735 S. Ellis Avenue Chicago IL 60637 USA
| |
Collapse
|
81
|
|
82
|
Ehlert J, Kronemann J, Zumbrägel N, Preller M. Lipase-Catalyzed Chemoselective Ester Hydrolysis of Biomimetically Coupled Aryls for the Synthesis of Unsymmetric Biphenyl Esters. Molecules 2019; 24:molecules24234272. [PMID: 31771200 PMCID: PMC6930668 DOI: 10.3390/molecules24234272] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 11/17/2019] [Accepted: 11/21/2019] [Indexed: 11/21/2022] Open
Abstract
Lipases are among the most frequently used biocatalysts in organic synthesis, allowing numerous environmentally friendly and inexpensive chemical transformations. Here, we present a biomimetic strategy based on iron(III)-catalyzed oxidative coupling and selective ester monohydrolysis using lipases for the synthesis of unsymmetric biphenyl-based esters under mild conditions. The diverse class of biphenyl esters is of pharmaceutical and technical relevance. We explored the potency of a series of nine different lipases of bacterial, fungal, and mammalian origin on their catalytic activities to cleave biphenyl esters, and optimized the reaction conditions, in terms of reaction time, temperature, pH, organic solvent, and water–organic solvent ratios, to improve the chemoselectivity, and hence control the ratio of unsymmetric versus symmetric products. Elevated temperature and increased DMSO content led to an almost exclusive monohydrolysis by the four lipases Candida rugosa lipase (CRL), Mucor miehei lipase (MML), Rhizopus niveus lipase (RNL), and Pseudomonas fluorescens lipase (PFL). The study was complemented by in silico binding predictions to rationalize the observed differences in efficacies of the lipases to convert biphenyl esters. The optimized reaction conditions were transferred to the preparative scale with high yields, underlining the potential of the presented biomimetic approach as an alternative strategy to the commonly used transition metal-based strategies for the synthesis of diverse biphenyl esters.
Collapse
Affiliation(s)
- Janna Ehlert
- Institute for Biophysical Chemistry, Hannover Medical School, 30625 Hannover, Germany
- Centre of Biomolecular Drug Research (BMWZ), Leibniz University Hannover, 30167 Hannover, Germany
| | - Jenny Kronemann
- Institute for Biophysical Chemistry, Hannover Medical School, 30625 Hannover, Germany
- Centre of Biomolecular Drug Research (BMWZ), Leibniz University Hannover, 30167 Hannover, Germany
| | - Nadine Zumbrägel
- Institute for Biophysical Chemistry, Hannover Medical School, 30625 Hannover, Germany
- Centre of Biomolecular Drug Research (BMWZ), Leibniz University Hannover, 30167 Hannover, Germany
| | - Matthias Preller
- Institute for Biophysical Chemistry, Hannover Medical School, 30625 Hannover, Germany
- Centre of Biomolecular Drug Research (BMWZ), Leibniz University Hannover, 30167 Hannover, Germany
- Correspondence:
| |
Collapse
|
83
|
Moreira R, Diamandas M, Taylor SD. Synthesis of Fmoc-Protected Amino Alcohols via the Sharpless Asymmetric Aminohydroxylation Reaction Using FmocNHCl as the Nitrogen Source. J Org Chem 2019; 84:15476-15485. [PMID: 31671947 DOI: 10.1021/acs.joc.9b02491] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The aminohydroxylation of various alkenes using FmocNHCl as a nitrogen source is reported. In general, in the absence of a ligand, the reaction provided racemic Fmoc-protected amino alcohols with excellent regioselectivity but in low to moderate yields. However, in some instances, the yield of an amino alcohol product and the regioselectivity could be altered by the addition of a catalytic amount of triethylamine (TEA). The Sharpless asymmetric variant of this reaction (Sharpless asymmetric aminohydroxylation (SAAH)), using (DHQD)2PHAL (DHQD) or (DHQ)2PHAL (DHQ) as chiral ligands, proceeded more readily and in higher yield compared to the same reaction in the absence of a chiral ligand. The enantiomeric ratios (er) of all but two examples exceeded 90:10 with many examples giving er values of 95:5 or higher, making FmocNHCl a highly practical reagent for preparing chiral amino alcohols. The SAAH reaction using FmocNHCl was used for the preparation of d-threo-β-hydroxyasparagine and d-threo-β-methoxyaspartate, suitably protected for Fmoc solid phase peptide synthesis.
Collapse
Affiliation(s)
- Ryan Moreira
- Department of Chemistry , University of Waterloo , 200 University Avenue West , Waterloo , Ontario , Canada , N2L 3G1
| | - Matthew Diamandas
- Department of Chemistry , University of Waterloo , 200 University Avenue West , Waterloo , Ontario , Canada , N2L 3G1
| | - Scott D Taylor
- Department of Chemistry , University of Waterloo , 200 University Avenue West , Waterloo , Ontario , Canada , N2L 3G1
| |
Collapse
|
84
|
Isley NA, Endo Y, Wu ZC, Covington BC, Bushin LB, Seyedsayamdost MR, Boger DL. Total Synthesis and Stereochemical Assignment of Streptide. J Am Chem Soc 2019; 141:17361-17369. [PMID: 31577142 DOI: 10.1021/jacs.9b09067] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Streptide (1) is a peptide-derived macrocyclic natural product that has attracted considerable attention since its discovery in 2015. It contains an unprecedented post-translational modification that intramolecularly links the β-carbon (C3) of a residue 2 lysine with the C7 of a residue 6 tryptophan, thereby forming a 20-membered cyclic peptide. Herein, we report the first total synthesis of streptide that confirms the regiochemistry of the lysine-tryptophan cross-link and provides an unambiguous assignment of the stereochemistry (3R vs 3S) of the lysine-2 C3 center. Both the 3R and the originally assigned 3S lysine diastereomers were independently prepared by total synthesis, and it is the former, not the latter, that was found to correlate with the natural product. The approach enlists a powerful Pd(0)-mediated indole annulation for the key macrocyclization of the complex core peptide, utilizes an underdeveloped class of hypervalent iodine(III) aryl substrates in a palladium-catalyzed C-H activation/β-arylation reaction conducted on a lysine derivative, and provides access to material with which the role of streptide and related natural products may be examined.
Collapse
Affiliation(s)
- Nicholas A Isley
- Department of Chemistry and Skaggs Institute for Chemical Biology , The Scripps Research Institute , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
| | - Yusuke Endo
- Department of Chemistry and Skaggs Institute for Chemical Biology , The Scripps Research Institute , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
| | - Zhi-Chen Wu
- Department of Chemistry and Skaggs Institute for Chemical Biology , The Scripps Research Institute , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
| | - Brett C Covington
- Department of Chemistry , Princeton University , Princeton , New Jersey 08544 , United States
| | - Leah B Bushin
- Department of Chemistry , Princeton University , Princeton , New Jersey 08544 , United States
| | | | - Dale L Boger
- Department of Chemistry and Skaggs Institute for Chemical Biology , The Scripps Research Institute , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
| |
Collapse
|
85
|
Sato R, Tosaka T, Masu H, Arai T. Catalytic Asymmetric Synthesis of Chiral Bis(indolyl)methanes Using a Ts-PyBidine-Nickel Complex. J Org Chem 2019; 84:14248-14257. [PMID: 31553607 DOI: 10.1021/acs.joc.9b02006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A chiral tosyl-substituted bis(imidazolidine)pyridine Ts-PyBidine-nickel complex was an efficient catalyst for Friedel-Crafts reaction of indoles with methylene indolinones to give bisindolylmethane compounds having differently oxidized indole units with high enantioselectivities. Alkylation of the products proceeded smoothly in a highly diastereoselective manner, providing an all-carbon quaternary carbon center without significant loss of enantiomeric excess.
Collapse
Affiliation(s)
- Ryo Sato
- Soft Molecular Activation Research Center (SMARC), Chiba Iodine Research Innovation Center (CIRIC), and Department of Chemistry, Graduate School of Science , Chiba University , 1-33 Yayoi , Inage, Chiba 263-8522 , Japan
| | - Takuya Tosaka
- Soft Molecular Activation Research Center (SMARC), Chiba Iodine Research Innovation Center (CIRIC), and Department of Chemistry, Graduate School of Science , Chiba University , 1-33 Yayoi , Inage, Chiba 263-8522 , Japan
| | - Hyuma Masu
- Center for Analytical Instrumentation , Chiba University , 1-33 Yayoi , Inage, Chiba 263-8522 , Japan
| | - Takayoshi Arai
- Soft Molecular Activation Research Center (SMARC), Chiba Iodine Research Innovation Center (CIRIC), and Department of Chemistry, Graduate School of Science , Chiba University , 1-33 Yayoi , Inage, Chiba 263-8522 , Japan
| |
Collapse
|
86
|
Yamamoto K, Sato T, Hikiji Y, Katsuyama A, Matsumaru T, Yakushiji F, Yokota SI, Ichikawa S. Synthesis and biological evaluation of a MraY selective analogue of tunicamycins. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2019; 39:349-364. [PMID: 31566068 DOI: 10.1080/15257770.2019.1649696] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Tunicamycins, which are nucleoside natural products, inhibit both bacterial phospho-N-acetylmuraminic acid (MurNAc)-pentapeptide translocase (MraY) and human UDP-N-acetylglucosamine (GlcNAc): polyprenol phosphate translocase (GPT). The improved synthesis and detailed biological evaluation of an MraY-selective inhibitor, 2, where the GlcNAc moiety was modified to a MurNAc amide, has been described.
Collapse
Affiliation(s)
- Kazuki Yamamoto
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
| | - Toyotaka Sato
- Department of Microbiology, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Yuta Hikiji
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
| | - Akira Katsuyama
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan.,Center for Research and Education on Drug Discovery, Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
| | - Takanori Matsumaru
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan.,Center for Research and Education on Drug Discovery, Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
| | - Fumika Yakushiji
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan.,Center for Research and Education on Drug Discovery, Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
| | - Shin-Ichi Yokota
- Department of Microbiology, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Satoshi Ichikawa
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan.,Center for Research and Education on Drug Discovery, Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
| |
Collapse
|
87
|
Boyko YD, Huck CJ, Sarlah D. Total Synthesis of Isomalabaricane Triterpenoids. J Am Chem Soc 2019; 141:14131-14135. [DOI: 10.1021/jacs.9b08487] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Yaroslav D. Boyko
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - Christopher J. Huck
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - David Sarlah
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
| |
Collapse
|
88
|
Oberheide A, Schwenk S, Ronco C, Semmrau LM, Görls H, Arndt HD. Synthesis, Structure, and Cytotoxicity of Urukthapelstatin A Polyazole Cyclopeptide Analogs. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900206] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Ansgar Oberheide
- Institut für Organische Chemie und Makromolekulare Chemie; Friedrich-Schiller-Universität; Humboldtstr. 10 07743 Jena Germany
| | - Sebastian Schwenk
- Institut für Organische Chemie und Makromolekulare Chemie; Friedrich-Schiller-Universität; Humboldtstr. 10 07743 Jena Germany
| | - Cyril Ronco
- CNRS UMR7272; Université Côte d'Azur; Institut de Chimie de Nice 28, Avenue Valrose 06108 Nice France
| | - Lisa Maria Semmrau
- Institut für Organische Chemie und Makromolekulare Chemie; Friedrich-Schiller-Universität; Humboldtstr. 10 07743 Jena Germany
| | - Helmar Görls
- Institut für Anorganische und Analytische Chemie; Friedrich-Schiller-Universität; Humboldtstr. 8 07743 Jena Germany
| | - Hans-Dieter Arndt
- Institut für Organische Chemie und Makromolekulare Chemie; Friedrich-Schiller-Universität; Humboldtstr. 10 07743 Jena Germany
| |
Collapse
|
89
|
Watanabe T. Chemical Studies on Bioactive Natural Products Directed toward Development of Novel Antiinfective and Anticancer Medicines. Chem Pharm Bull (Tokyo) 2019; 67:620-631. [PMID: 31257316 DOI: 10.1248/cpb.c19-00215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Natural products are still rich sources of clinically used medicines and lead compounds for them. This review summarizes chemical studies carried out by the author on natural products of microorganism origin, many of which were discovered at the Institute of Microbial Chemistry (BIKAKEN). Caprazamycin B is a liponucleoside antibiotic from which CPZEN-45, an antituberculosis agent with a unique mode of action, was developed. Intervenolin and leucinostatin A exert antiproliferative activity toward tumor cells in the presence of the corresponding stromal cells, which implies that the primary molecular targets of these molecules should be related to growth signals from normal (stromal) cells. Details of the endeavors to establish efficient synthetic routes to these compounds which accelerated structure-activity relationship studies and further evaluation of biological activity are described.
Collapse
|
90
|
Mellini P, Itoh Y, Elboray EE, Tsumoto H, Li Y, Suzuki M, Takahashi Y, Tojo T, Kurohara T, Miyake Y, Miura Y, Kitao Y, Kotoku M, Iida T, Suzuki T. Identification of Diketopiperazine-Containing 2-Anilinobenzamides as Potent Sirtuin 2 (SIRT2)-Selective Inhibitors Targeting the "Selectivity Pocket", Substrate-Binding Site, and NAD +-Binding Site. J Med Chem 2019; 62:5844-5862. [PMID: 31144814 DOI: 10.1021/acs.jmedchem.9b00255] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The NAD+-dependent deacetylase SIRT2 represents an attractive target for drug development. Here, we designed and synthesized drug-like SIRT2-selective inhibitors based on an analysis of the putative binding modes of recently reported SIRT2-selective inhibitors and evaluated their SIRT2-inhibitory activity. This led us to develop a more drug-like diketopiperazine structure as a "hydrogen bond (H-bond) hunter" to target the substrate-binding site of SIRT2. Thioamide 53, a conjugate of diketopiperazine and 2-anilinobenzamide which is expected to occupy the "selectivity pocket" of SIRT2, exhibited potent SIRT2-selective inhibition. Inhibition of SIRT2 by 53 was mediated by the formation of a 53-ADP-ribose conjugate, suggesting that 53 is a mechanism-based inhibitor targeting the "selectivity pocket", substrate-binding site, and NAD+-binding site. Furthermore, 53 showed potent antiproliferative activity toward breast cancer cells and promoted neurite outgrowth of Neuro-2a cells. These findings should pave the way for the discovery of novel therapeutic agents for cancer and neurological disorders.
Collapse
Affiliation(s)
- Paolo Mellini
- Graduate School of Medical Science , Kyoto Prefectural University of Medicine , 1-5 Shimogamohangi-cho , Sakyo-ku, Kyoto 606-0823 , Japan
| | - Yukihiro Itoh
- Graduate School of Medical Science , Kyoto Prefectural University of Medicine , 1-5 Shimogamohangi-cho , Sakyo-ku, Kyoto 606-0823 , Japan
| | - Elghareeb E Elboray
- Graduate School of Medical Science , Kyoto Prefectural University of Medicine , 1-5 Shimogamohangi-cho , Sakyo-ku, Kyoto 606-0823 , Japan.,Chemistry Department, Faculty of Science , South Valley University , Qena 83523 , Egypt
| | - Hiroki Tsumoto
- Research Team for Mechanism of Aging , Tokyo Metropolitan Institute of Gerontology , 35-2 Sakae-cho , Itabashi-ku, Tokyo 173-0015 , Japan
| | - Ying Li
- Graduate School of Medical Science , Kyoto Prefectural University of Medicine , 1-5 Shimogamohangi-cho , Sakyo-ku, Kyoto 606-0823 , Japan
| | - Miki Suzuki
- Graduate School of Medical Science , Kyoto Prefectural University of Medicine , 1-5 Shimogamohangi-cho , Sakyo-ku, Kyoto 606-0823 , Japan
| | - Yukari Takahashi
- Graduate School of Medical Science , Kyoto Prefectural University of Medicine , 1-5 Shimogamohangi-cho , Sakyo-ku, Kyoto 606-0823 , Japan
| | - Toshifumi Tojo
- Graduate School of Medical Science , Kyoto Prefectural University of Medicine , 1-5 Shimogamohangi-cho , Sakyo-ku, Kyoto 606-0823 , Japan
| | - Takashi Kurohara
- Graduate School of Medical Science , Kyoto Prefectural University of Medicine , 1-5 Shimogamohangi-cho , Sakyo-ku, Kyoto 606-0823 , Japan
| | - Yuka Miyake
- Graduate School of Medical Science , Kyoto Prefectural University of Medicine , 1-5 Shimogamohangi-cho , Sakyo-ku, Kyoto 606-0823 , Japan
| | - Yuri Miura
- Research Team for Mechanism of Aging , Tokyo Metropolitan Institute of Gerontology , 35-2 Sakae-cho , Itabashi-ku, Tokyo 173-0015 , Japan
| | - Yuki Kitao
- Graduate School of Medical Science , Kyoto Prefectural University of Medicine , 1-5 Shimogamohangi-cho , Sakyo-ku, Kyoto 606-0823 , Japan
| | - Masayuki Kotoku
- Graduate School of Medical Science , Kyoto Prefectural University of Medicine , 1-5 Shimogamohangi-cho , Sakyo-ku, Kyoto 606-0823 , Japan
| | - Tetsuya Iida
- Graduate School of Medical Science , Kyoto Prefectural University of Medicine , 1-5 Shimogamohangi-cho , Sakyo-ku, Kyoto 606-0823 , Japan
| | - Takayoshi Suzuki
- Graduate School of Medical Science , Kyoto Prefectural University of Medicine , 1-5 Shimogamohangi-cho , Sakyo-ku, Kyoto 606-0823 , Japan.,CREST , Japan Science and Technology Agency (JST) , 4-1-8 Honcho Kawaguchi , Saitama 332-0012 , Japan
| |
Collapse
|
91
|
Qiao L, Fisher E, McMurray L, Milicevic Sephton S, Hird M, Kuzhuppilly-Ramakrishnan N, Williamson DJ, Zhou X, Werry E, Kassiou M, Luthra S, Trigg W, Aigbirhio FI. Radiosynthesis of (R,S)-[ 18 F]GE387: A Potential PET Radiotracer for Imaging Translocator Protein 18 kDa (TSPO) with Low Binding Sensitivity to the Human Gene Polymorphism rs6971. ChemMedChem 2019; 14:982-993. [PMID: 30900397 PMCID: PMC6563049 DOI: 10.1002/cmdc.201900023] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 02/26/2019] [Indexed: 12/14/2022]
Abstract
Translocator protein (TSPO) is a biomarker of neuroinflammation, which is a hallmark of many neurodegenerative diseases and has been exploited as a positron emission tomography (PET) target. Carbon-11-labelled PK11195 remains the most applied agent for imaging TSPO, despite its short-lived isotope and low brain permeability. Second-generation radiotracers show variance in affinity amongst subjects (low-, mixed-, and high-affinity binders) caused by the genetic polymorphism (rs6971) of the TSPO gene. To overcome these limitations, a new structural scaffold was explored based on the TSPO pharmacophore, and the analogue with a low-affinity binder/high-affinity binder (LAB/HAB) ratio similar (1.2 vs. 1.3) to that of (R)-[11 C]PK11195 was investigated. The synthesis of the reference compound was accomplished in six steps and 9 % overall yield, and the precursor was prepared in eight steps and 8 % overall yield. The chiral separation of the reference and precursor compounds was performed using supercritical fluid chromatography with >95 % ee. The absolute configuration was determined by circular dichroism. Optimisation of reaction conditions for manual radiolabelling revealed acetonitrile as a preferred solvent at 100 °C. Automation of this radiolabelling method provided R and S enantiomers in respective 21.3±16.7 and 25.6±7.1 % decay-corrected yields and molar activities of 55.8±35.6 and 63.5±39.5 GBq μmol-1 (n=3). Injection of the racemic analogue into a healthy rat confirmed passage through the blood-brain barrier.
Collapse
Affiliation(s)
- Luxi Qiao
- Molecular Imaging Chemical Laboratory, Wolfson Brain Imaging Centre, Department of Clinical Neurosciences, University of Cambridge, Biomedical Campus, Cambridge, CB2 0SZ, UK
| | - Emily Fisher
- Molecular Imaging Chemical Laboratory, Wolfson Brain Imaging Centre, Department of Clinical Neurosciences, University of Cambridge, Biomedical Campus, Cambridge, CB2 0SZ, UK
| | - Lindsay McMurray
- Molecular Imaging Chemical Laboratory, Wolfson Brain Imaging Centre, Department of Clinical Neurosciences, University of Cambridge, Biomedical Campus, Cambridge, CB2 0SZ, UK
| | - Selena Milicevic Sephton
- Molecular Imaging Chemical Laboratory, Wolfson Brain Imaging Centre, Department of Clinical Neurosciences, University of Cambridge, Biomedical Campus, Cambridge, CB2 0SZ, UK
| | - Matthew Hird
- Molecular Imaging Chemical Laboratory, Wolfson Brain Imaging Centre, Department of Clinical Neurosciences, University of Cambridge, Biomedical Campus, Cambridge, CB2 0SZ, UK
| | - Nisha Kuzhuppilly-Ramakrishnan
- Molecular Imaging Chemical Laboratory, Wolfson Brain Imaging Centre, Department of Clinical Neurosciences, University of Cambridge, Biomedical Campus, Cambridge, CB2 0SZ, UK
| | - David J Williamson
- Molecular Imaging Chemical Laboratory, Wolfson Brain Imaging Centre, Department of Clinical Neurosciences, University of Cambridge, Biomedical Campus, Cambridge, CB2 0SZ, UK
| | - Xiouyun Zhou
- Molecular Imaging Chemical Laboratory, Wolfson Brain Imaging Centre, Department of Clinical Neurosciences, University of Cambridge, Biomedical Campus, Cambridge, CB2 0SZ, UK
| | - Eryn Werry
- School of Chemistry, The University of Sydney, Building F11, Eastern Avenue, Sydney, NSW, 2006, Australia
| | - Michael Kassiou
- School of Chemistry, The University of Sydney, Building F11, Eastern Avenue, Sydney, NSW, 2006, Australia
| | | | | | - Franklin I Aigbirhio
- Molecular Imaging Chemical Laboratory, Wolfson Brain Imaging Centre, Department of Clinical Neurosciences, University of Cambridge, Biomedical Campus, Cambridge, CB2 0SZ, UK
| |
Collapse
|
92
|
Taylor CM, Kutty SK, Edagwa BJ. Total Synthesis of Alloviroidin. Org Lett 2019; 21:2281-2284. [PMID: 30859823 DOI: 10.1021/acs.orglett.9b00567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Alloviroidin is a cyclic heptapeptide, produced by several species of Amanita mushrooms, that demonstrates high affinity for F-actin as is characteristic of virotoxins and phallotoxins. Alloviroidin was synthesized via a [3 + 4] fragment condensation of Fmoc-d-Thr(OTBS)-d-Ser(OTBS)-(2 S,3 R,4 R)-DHPro(OTBS)2-OH and H-Ala-Trp(2-SO2Me)-(2 S,4 S)-DHLeu(5-OTBS)-Val-OMe to form bond A. The linear heptapeptide favored a turn conformation, facilitating cyclization between Val1 and d-Thr2 (position B). Global deprotection and HPLC purification afforded alloviroidin with NMR spectra in excellent agreement with the natural product.
Collapse
Affiliation(s)
- Carol M Taylor
- Department of Chemistry , Louisiana State University , Baton Rouge , Louisiana 70803 , United States
| | - Samuel K Kutty
- Department of Chemistry , Louisiana State University , Baton Rouge , Louisiana 70803 , United States
| | - Benson J Edagwa
- Department of Chemistry , Louisiana State University , Baton Rouge , Louisiana 70803 , United States
| |
Collapse
|
93
|
Affiliation(s)
- Naifeng Hu
- State Key Laboratory of Elemento-organic ChemistryCollege of ChemistryNankai University Tianjin 300071 China
| | - Changming Dong
- State Key Laboratory of Elemento-organic ChemistryCollege of ChemistryNankai University Tianjin 300071 China
| | - Cuifang Zhang
- State Key Laboratory of Elemento-organic ChemistryCollege of ChemistryNankai University Tianjin 300071 China
| | - Guangxin Liang
- State Key Laboratory of Elemento-organic ChemistryCollege of ChemistryNankai University Tianjin 300071 China
| |
Collapse
|
94
|
Hu N, Dong C, Zhang C, Liang G. Total Synthesis of (-)-Indoxamycins A and B. Angew Chem Int Ed Engl 2019; 58:6659-6662. [PMID: 30835916 DOI: 10.1002/anie.201902043] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Indexed: 11/07/2022]
Abstract
The concise total syntheses of (-)-indoxamycins A and B is reported. The chemistry features a seven-step preparation of a highly congested [5.5.6] tricyclic advanced common intermediate from a readily available R-carvone derivative. Key steps involve a Pauson-Khand reaction for the rapid construction of a basic scaffold bearing a quaternary carbon, a copper-catalyzed Michael addition for the introduction of another adjacent all-carbon quaternary stereocenter, and a tandem retro-oxa-Michael addition/1,2-addition/oxa-Michael addition for the installation of a trisubstituted olefin side chain. This synthetic strategy allows for easy access to both enantiomers of this family of natural products and their analogues from cost-effective starting material through straightforward chemical transformations.
Collapse
Affiliation(s)
- Naifeng Hu
- State Key Laboratory of Elemento-organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Changming Dong
- State Key Laboratory of Elemento-organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Cuifang Zhang
- State Key Laboratory of Elemento-organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Guangxin Liang
- State Key Laboratory of Elemento-organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| |
Collapse
|
95
|
Butler E, Florentino L, Cornut D, Gomez-Campillos G, Liu H, Regan AC, Thomas EJ. Synthesis of macrocyclic precursors of the vioprolides. Org Biomol Chem 2019; 16:6935-6960. [PMID: 30226509 DOI: 10.1039/c8ob01756e] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The vioprolides are novel depsipeptides that have not been synthesized. However, they have been identified as important targets for synthesis because of their novel biological activities and challenging chemical structures. Following early work on the synthesis of a modified tetrapeptide that contained both the (E)-dehydrobutyrine and thiazoline components of vioprolide D, problems were encountered in taking an (E)-dehydrobutyrine containing intermediate further into the synthesis. A second approach to vioprolides and analogues was therefore investigated in which (E)- and (Z)-dehydrobutyrines were to be introduced by selenoxide elimination very late in the synthesis. A convergent approach to advanced macrocyclic precursors of the vioprolides was then completed using a modified hexapeptide and a dipeptidyl glycerate. In this work, it was necessary to protect the 2-hydroxyl group of the glycerate as its acetate and not as its 2,2,2-trichloroethoxycarbonate. Preliminary studies were carried out on the introduction of the required dehydrobutyrine and thiazoline components into advanced intermediates.
Collapse
Affiliation(s)
- Eibhlin Butler
- The School of Chemistry, The University of Manchester, Manchester, M13 9PL, UK.
| | | | | | | | | | | | | |
Collapse
|
96
|
Cariati L, Oliverio M, Mutti FG, Bonacci S, Knaus T, Costanzo P, Procopio A. Hydrolases-mediated transformation of oleuropein into demethyloleuropein. Bioorg Chem 2019; 84:384-388. [DOI: 10.1016/j.bioorg.2018.12.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Revised: 11/27/2018] [Accepted: 12/03/2018] [Indexed: 10/27/2022]
|
97
|
Akasapu S, Hinds AB, Powell WC, Walczak MA. Total synthesis of micrococcin P1 and thiocillin I enabled by Mo(vi) catalyst. Chem Sci 2019; 10:1971-1975. [PMID: 30881626 PMCID: PMC6383332 DOI: 10.1039/c8sc04885a] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 12/03/2018] [Indexed: 12/05/2022] Open
Abstract
Thiopeptides are a class of potent antibiotics with promising therapeutic potential. We developed a novel Mo(vi)-oxide/picolinic acid catalyst for the cyclodehydration of cysteine peptides to form thiazoline heterocycles. With this powerful tool in hand, we completed the total syntheses of two representative thiopeptide antibiotics: micrococcin P1 and thiocillin I. These two concise syntheses (15 steps, longest linear sequence) feature a C-H activation strategy to install the trisubstituted pyridine core and thiazole groups. The synthetic material displays promising antimicrobial properties measured against a series of Gram-positive bacteria.
Collapse
Affiliation(s)
- Siddhartha Akasapu
- Department of Chemistry , University of Colorado , Boulder , CO 80309 , USA .
| | - Aaron B Hinds
- Department of Chemistry , University of Colorado , Boulder , CO 80309 , USA .
| | - Wyatt C Powell
- Department of Chemistry , University of Colorado , Boulder , CO 80309 , USA .
| | - Maciej A Walczak
- Department of Chemistry , University of Colorado , Boulder , CO 80309 , USA .
| |
Collapse
|
98
|
Gao B, Chen S, Hou YN, Zhao YJ, Ye T, Xu Z. Solution-phase total synthesis of teixobactin. Org Biomol Chem 2019; 17:1141-1153. [PMID: 30638238 DOI: 10.1039/c8ob02803f] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The first solution-phase total synthesis of the cyclic depsipeptide teixobactin is described. Stereoselective construction of l-allo-enduracididine was established, and the protective groups for the peptide coupling reactions and conditions for the assembly of the fragments were also optimised. The longest linear sequence for the total synthesis was 20 steps from the known l-cis-4-hydroxyproline derivative and gave a 5.6% overall yield. This solution-phase total synthesis could serve as a complement to the current solid-phase synthesis of teixobactin.
Collapse
Affiliation(s)
- Bowen Gao
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, and Engineering Laboratory for Chiral Drug Synthesis, Peking University Shenzhen Graduate School, Xili, Nanshan District, Shenzhen 518055, China.
| | | | | | | | | | | |
Collapse
|
99
|
Planke T, Moreno M, Hüttel S, Fohrer J, Gille F, Norris MD, Siebke M, Wang L, Müller R, Kirschning A. Cystobactamids 920-1 and 920-2: Assignment of the Constitution and Relative Configuration by Total Synthesis. Org Lett 2019; 21:1359-1363. [DOI: 10.1021/acs.orglett.9b00058] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Therese Planke
- Institut für Organische Chemie und Biomolekulares Wirkstoffzentrum (BMWZ) der Leibniz Universität Hannover, Schneiderberg 1B, 30167 Hannover, Germany
| | - María Moreno
- Institut für Organische Chemie und Biomolekulares Wirkstoffzentrum (BMWZ) der Leibniz Universität Hannover, Schneiderberg 1B, 30167 Hannover, Germany
| | - Stephan Hüttel
- Abteilung Mikrobielle Naturstoffe, Helmholtz Institut für Pharmazeutische Forschung Saarland, Helmholtz Zentrum für Infektionsforschung und Universität des Saarlandes, Campus E8.1, 66123 Saarbrücken, Germany
| | - Jörg Fohrer
- Institut für Organische Chemie und Biomolekulares Wirkstoffzentrum (BMWZ) der Leibniz Universität Hannover, Schneiderberg 1B, 30167 Hannover, Germany
| | - Franziska Gille
- Institut für Organische Chemie und Biomolekulares Wirkstoffzentrum (BMWZ) der Leibniz Universität Hannover, Schneiderberg 1B, 30167 Hannover, Germany
| | - Matthew D. Norris
- Institut für Organische Chemie und Biomolekulares Wirkstoffzentrum (BMWZ) der Leibniz Universität Hannover, Schneiderberg 1B, 30167 Hannover, Germany
| | - Maik Siebke
- Institut für Organische Chemie und Biomolekulares Wirkstoffzentrum (BMWZ) der Leibniz Universität Hannover, Schneiderberg 1B, 30167 Hannover, Germany
| | - Liangliang Wang
- Institut für Organische Chemie und Biomolekulares Wirkstoffzentrum (BMWZ) der Leibniz Universität Hannover, Schneiderberg 1B, 30167 Hannover, Germany
| | - Rolf Müller
- Abteilung Mikrobielle Naturstoffe, Helmholtz Institut für Pharmazeutische Forschung Saarland, Helmholtz Zentrum für Infektionsforschung und Universität des Saarlandes, Campus E8.1, 66123 Saarbrücken, Germany
| | - Andreas Kirschning
- Institut für Organische Chemie und Biomolekulares Wirkstoffzentrum (BMWZ) der Leibniz Universität Hannover, Schneiderberg 1B, 30167 Hannover, Germany
| |
Collapse
|
100
|
Oberheide A, Pflanze S, Stallforth P, Arndt HD. Solid-Phase-Based Total Synthesis and Stereochemical Assignment of the Cryptic Natural Product Aurantizolicin. Org Lett 2019; 21:729-732. [DOI: 10.1021/acs.orglett.8b03940] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ansgar Oberheide
- Friedrich-Schiller-Universität, Institut für Organische und Makromolekulare Chemie, Humboldtstr. 10, D-07743 Jena, Germany
| | - Sebastian Pflanze
- Leibniz Institute for Natural Product Research and Infection Biology, Hans Knöll Institute (HKI), Chemistry of Microbial Communication, Beutenbergstr. 11A, D-07745 Jena, Germany
| | - Pierre Stallforth
- Leibniz Institute for Natural Product Research and Infection Biology, Hans Knöll Institute (HKI), Chemistry of Microbial Communication, Beutenbergstr. 11A, D-07745 Jena, Germany
| | - Hans-Dieter Arndt
- Friedrich-Schiller-Universität, Institut für Organische und Makromolekulare Chemie, Humboldtstr. 10, D-07743 Jena, Germany
| |
Collapse
|