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Ayesha, Ashraf A, Arshad M, Sajid N, Rasool N, Abbas M, Nazeer U, Khalid M, Imran M. Dinuclear Zn-Catalytic System as Brønsted Base and Lewis Acid for Enantioselectivity in Same Chiral Environment. ACS OMEGA 2024; 9:6074-6092. [PMID: 38375498 PMCID: PMC10876046 DOI: 10.1021/acsomega.3c07446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 12/24/2023] [Accepted: 12/27/2023] [Indexed: 02/21/2024]
Abstract
Zinc (Zn) is a crucial element with remarkable significance in organic transformations. The profusion of harmless zinc salts in the Earth's outer layer qualifies zinc as a noteworthy contender for inexpensive and eco-friendly reagents and catalysts. Recently, widely recognized uses of organo-Zn compounds in the field of organic synthesis have undergone extensive expansion toward asymmetric transformations. The ProPhenol ligand, a member of the chiral nitrogenous-crown family, exhibits the spontaneous formation of a dual-metal complex when reacted with alkyl metal (R-M) reagents, e.g., ZnEt2. The afforded Zn complex possesses two active sites, one Lewis acid and the other Brønsted base, thereby facilitating the activation of nucleophiles and electrophiles simultaneously within the same chiral pocket. In this comprehensive analysis, we provide a thorough account of the advancement and synthetic potential of these diverse catalysts in organic synthesis, while emphasizing the reactivity and selectivities, i.e., dr and ee due to the design/structure of the ligands employed.
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Affiliation(s)
- Ayesha
- Department
of Chemistry, Government College University
Faisalabad, Faisalabad 38000, Pakistan
| | - Aisha Ashraf
- Department
of Chemistry, Government College University
Faisalabad, Faisalabad 38000, Pakistan
| | - Mahwish Arshad
- Department
of Chemistry, Government College University
Faisalabad, Faisalabad 38000, Pakistan
- Roy
and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Numan Sajid
- Department
of Chemistry, Government College University
Faisalabad, Faisalabad 38000, Pakistan
| | - Nasir Rasool
- Department
of Chemistry, Government College University
Faisalabad, Faisalabad 38000, Pakistan
| | - Mujahad Abbas
- Department
of Chemistry, Government College University
Faisalabad, Faisalabad 38000, Pakistan
| | - Usman Nazeer
- Chemistry
Department, University of Houston, 3585 Cullen Boulvard, Houston, Texas 77204-5003, United States
| | | | - Muhammad Imran
- Chemistry
Department, Faculty of Science, King Khalid
University, P.O. Box 9004, Abha 61413, Saudi Arabia
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2
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Di Terlizzi L, Martinelli A, Merli D, Protti S, Fagnoni M. Arylazo Sulfones as Nonionic Visible-Light Photoacid Generators. J Org Chem 2022; 88:6313-6321. [PMID: 35866712 DOI: 10.1021/acs.joc.2c01248] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The selective visible-light-driven generation of a weak acid (sulfinic acid, in nitrogen-purged solutions) or a strong acid (sulfonic acid, in oxygen-purged solutions) by using shelf-stable arylazo sulfones was developed. These sulfones were then used for the green, smooth, and efficient photochemical catalytic protection of several (substituted) alcohols (and phenols) as tetrahydropyranyl ethers or acetals.
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Affiliation(s)
- Lorenzo Di Terlizzi
- PhotoGreen Lab, Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
| | - Angelo Martinelli
- Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
| | - Daniele Merli
- Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
| | - Stefano Protti
- PhotoGreen Lab, Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
| | - Maurizio Fagnoni
- PhotoGreen Lab, Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
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3
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Poock C, Kalesse M. Total Synthesis and Structure Revision of Halioxepine. Chemistry 2021; 27:1615-1619. [PMID: 33215739 PMCID: PMC7898713 DOI: 10.1002/chem.202004847] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 11/19/2020] [Indexed: 02/04/2023]
Abstract
The first total synthesis of halioxepine is accomplished using a 1,4-addition for constructing the quaternary center at C10 and a halo etherification for the generation of the tertiary ether at C7. The correct structure of halioxepine was determined by assembling different enantiomeric building blocks and by changing the relative configuration between C10 and C15.
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Affiliation(s)
- Caroline Poock
- Institute for Organic ChemistryGottfried Wilhelm Leibniz Universität HannoverSchneiderberg 1B30167HannoverGermany
| | - Markus Kalesse
- Institute for Organic ChemistryGottfried Wilhelm Leibniz Universität HannoverSchneiderberg 1B30167HannoverGermany
- Centre of Biomolecular Drug Research (BMWZ)Gottfried Wilhelm Leibniz Universität HannoverSchneiderberg 3830167HannoverGermany
- Helmholtz Centre for Infection Research (HZI)Inhoffenstrasse 738124BraunschweigGermany
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4
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Cai L, Yao Y, Yeon SK, Seiple IB. Modular Approaches to Lankacidin Antibiotics. J Am Chem Soc 2020; 142:15116-15126. [PMID: 32786797 DOI: 10.1021/jacs.0c06648] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Lankacidins are a class of polyketide natural products isolated from Streptomyces spp. that show promising antimicrobial activity. Owing to their complex molecular architectures and chemical instability, structural assignment and derivatization of lankacidins are challenging tasks. Herein we describe three fully synthetic approaches to lankacidins that enable access to new structural variability within the class. We use these routes to systematically generate stereochemical derivatives of both cyclic and acyclic lankacidins. Additionally, we access a new series of lankacidins bearing a methyl group at the C4 position, a modification intended to increase chemical stability. In the course of this work, we discovered that the reported structures for two natural products of the lankacidin class were incorrect, and we determine the correct structures of 2,18-seco-lankacidinol B and iso-lankacidinol. We also evaluate the ability of several iso- and seco-lankacidins to inhibit the growth of bacteria and to inhibit translation in vitro. This work grants insight into the rich chemical complexity of this class of antibiotics and provides an avenue for further structural derivatization.
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Affiliation(s)
- Lingchao Cai
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jinagsu Key Lab of Biomass-Based Green Fuels and Chemicals, Nanjing Forestry University, Nanjing, 210037 Jiangsu, China.,Department of Pharmaceutical Chemistry and Cardiovascular Research Institute, University of California at San Francisco, San Francisco, California 94158, United States
| | - Yanmin Yao
- Department of Pharmaceutical Chemistry and Cardiovascular Research Institute, University of California at San Francisco, San Francisco, California 94158, United States
| | - Seul Ki Yeon
- Department of Pharmaceutical Chemistry and Cardiovascular Research Institute, University of California at San Francisco, San Francisco, California 94158, United States
| | - Ian B Seiple
- Department of Pharmaceutical Chemistry and Cardiovascular Research Institute, University of California at San Francisco, San Francisco, California 94158, United States
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6
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Yao Y, Cai L, Seiple IB. Synthesis, Structural Reassignment, and Antibacterial Evaluation of 2,18-Seco-Lankacidinol B. Angew Chem Int Ed Engl 2018; 57:13551-13554. [PMID: 30133094 PMCID: PMC6494672 DOI: 10.1002/anie.201808612] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Indexed: 12/15/2022]
Abstract
Lankacidins are a group of polyketide natural products with activity against several strains of Gram-positive bacteria. We developed a route to stereochemically diverse variants of 2,18-seco-lankacidinol B and found that the stereochemical assignment at C4 requires revision. This has interesting implications for the biosynthesis of natural products of the lankacidin class, all of which possessed uniform stereochemistry prior to this finding. We have evaluated 2,18-seco-lankacidinol B and three stereochemical derivatives against a panel of pathogenic Gram-positive and Gram-negative bacteria.
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Affiliation(s)
- Yanmin Yao
- Department of Pharmaceutical Chemistry and Cardiovascular Research Institute, University of California, San Francisco, San Francisco, CA, 94158, USA
| | - Lingchao Cai
- Department of Pharmaceutical Chemistry and Cardiovascular Research Institute, University of California, San Francisco, San Francisco, CA, 94158, USA
| | - Ian B Seiple
- Department of Pharmaceutical Chemistry and Cardiovascular Research Institute, University of California, San Francisco, San Francisco, CA, 94158, USA
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Yao Y, Cai L, Seiple IB. Synthesis, Structural Reassignment, and Antibacterial Evaluation of 2,18-Seco
-Lankacidinol B. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201808612] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Yanmin Yao
- Department of Pharmaceutical Chemistry and Cardiovascular Research Institute; University of California, San Francisco; San Francisco CA 94158 USA
| | - Lingchao Cai
- Department of Pharmaceutical Chemistry and Cardiovascular Research Institute; University of California, San Francisco; San Francisco CA 94158 USA
| | - Ian B. Seiple
- Department of Pharmaceutical Chemistry and Cardiovascular Research Institute; University of California, San Francisco; San Francisco CA 94158 USA
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Kuilya TK, Das S, Saha D, Goswami RK. Studies toward the synthesis of strevertenes A and G: stereoselective construction of C1–C19segments of the molecules. Org Biomol Chem 2018; 16:7595-7608. [DOI: 10.1039/c8ob01754a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Efficient route for the stereoselective synthesis of common C1–C19segment of strevertenes A and G has been developed.
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Affiliation(s)
- Tapan Kumar Kuilya
- Department of Organic Chemistry
- Indian Association for the Cultivation of Science
- Kolkata-700032
- India
| | - Subhendu Das
- Department of Organic Chemistry
- Indian Association for the Cultivation of Science
- Kolkata-700032
- India
| | - Dhiman Saha
- Department of Organic Chemistry
- Indian Association for the Cultivation of Science
- Kolkata-700032
- India
| | - Rajib Kumar Goswami
- Department of Organic Chemistry
- Indian Association for the Cultivation of Science
- Kolkata-700032
- India
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9
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Irie R, Takada K, Ise Y, Ohtsuka S, Okada S, Gustafson KR, Matsunaga S. Structure Revision of Poecillastrin C and the Absolute Configuration of the β-Hydroxyaspartic Acid Residue. Org Lett 2017; 19:5395-5397. [PMID: 28956931 DOI: 10.1021/acs.orglett.7b02835] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The planar structure of poecillastrin C (1) was revised through selective reduction of the ester carbon. The absolute configuration of the β-hydroxyaspartic acid (OHAsp) residue was determined to be d-threo by Marfey's analysis. The acid hydrolysate of the reduction product of 1 liberated (2R,3R)-2-amino-3,4-dihydroxybutanoic acid, demonstrating that the β-carboxyl group in poecillastrin C was esterified. The structures of poecillastrins B-D and 73-deoxychondropsin A were also revised.
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Affiliation(s)
- Raku Irie
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo , Bunkyo-ku, Tokyo 113-8657, Japan
| | - Kentaro Takada
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo , Bunkyo-ku, Tokyo 113-8657, Japan
| | - Yuji Ise
- Sugashima Marine Biological Laboratory, Nagoya University , Toba, Mie 517-0004, Japan
| | - Susumu Ohtsuka
- Takehara Marine Station, Hiroshima University , Takehara, Hiroshima 725-0024, Japan
| | - Shigeru Okada
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo , Bunkyo-ku, Tokyo 113-8657, Japan
| | - Kirk R Gustafson
- Molecular Targets Laboratory, Center for Cancer Research, National Cancer Institute , Frederick, Maryland 21702, United States
| | - Shigeki Matsunaga
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo , Bunkyo-ku, Tokyo 113-8657, Japan
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O'Rourke NF, A M, Higgs HN, Eastman A, Micalizio GC. Function-Oriented Studies Targeting Pectenotoxin 2: Synthesis of the GH-Ring System and a Structurally Simplified Macrolactone. Org Lett 2017; 19:5154-5157. [PMID: 28901150 PMCID: PMC5633828 DOI: 10.1021/acs.orglett.7b02435] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
A chemical
foundation for function-oriented studies of pectenotoxin
2 (PTX2) is described. A synthesis of the bicyclic GH-system, and
the design and synthesis of a PTX2-analogue, is presented. While maintaining
critical features for actin binding, and lacking the Achilles’
heel for the natural product’s anticancer activity (the AB-spiroketal),
this first-generation analogue did not possess the anticancer properties
of PTX2, an observation that indicates the molecular significance
of features present in the natural product’s CDEF-tetracycle.
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Affiliation(s)
- Natasha F O'Rourke
- Department of Chemistry, Dartmouth College, Burke Laboratory , Hanover, New Hampshire 03755, United States
| | - Mu A
- Geisel School of Medicine, Dartmouth College , Hanover, New Hampshire 03755, United States
| | - Henry N Higgs
- Geisel School of Medicine, Dartmouth College , Hanover, New Hampshire 03755, United States
| | - Alan Eastman
- Geisel School of Medicine, Dartmouth College , Hanover, New Hampshire 03755, United States
| | - Glenn C Micalizio
- Department of Chemistry, Dartmouth College, Burke Laboratory , Hanover, New Hampshire 03755, United States
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