1
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Szyling J, Szymańska A, Franczyk A, Walkowiak J. [Pt(PPh 3) 4]-Catalyzed Selective Diboration of Symmetrical and Unsymmetrical 1,3-Diynes. J Org Chem 2022; 87:10651-10663. [PMID: 35917577 PMCID: PMC9396666 DOI: 10.1021/acs.joc.2c00844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A straightforward, efficient, and selective method for the preparation of novel boryl-functionalized enynes or dienes via [Pt(PPh3)4]-catalyzed diboration of a broad spectrum of symmetrical and unsymmetrical 1,3-diynes was developed. The catalytic cycle of diboration was proposed on the basis of low-temperature 31P NMR studies. An alternative isolation method via product condensation on a cold finger was developed, which, in contrast to previous literature reports, eliminates the need for the additional transformation of rapidly decomposing enynyl pinacol boronates to more stable silica-based column chromatography derivatives during the separation step. To prove the efficiency of this simple catalytic protocol, bisboryl-functionalized enynes were synthesized in a gram scale and tested as useful building blocks in advanced organic transformations, such as hydrosilylation and Suzuki and sila-Sonogashira couplings. The presence of silyl, boryl, as well as other functions like halogen or alkoxy in their structures builds a new class of multifunctionalized enynes that might be modified in various chemical reactions.
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Affiliation(s)
- Jakub Szyling
- Center for Advanced Technology, Adam Mickiewicz University in Poznan, Uniwersytetu Poznanskiego 10, 61-614 Poznan, Poland.,Faculty of Chemistry, Adam Mickiewicz University in Poznan, Uniwersytetu Poznanskiego 8, 61-614 Poznan, Poland
| | - Aleksandra Szymańska
- Center for Advanced Technology, Adam Mickiewicz University in Poznan, Uniwersytetu Poznanskiego 10, 61-614 Poznan, Poland.,Faculty of Chemistry, Adam Mickiewicz University in Poznan, Uniwersytetu Poznanskiego 8, 61-614 Poznan, Poland
| | - Adrian Franczyk
- Center for Advanced Technology, Adam Mickiewicz University in Poznan, Uniwersytetu Poznanskiego 10, 61-614 Poznan, Poland
| | - Jędrzej Walkowiak
- Center for Advanced Technology, Adam Mickiewicz University in Poznan, Uniwersytetu Poznanskiego 10, 61-614 Poznan, Poland
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2
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Abstract
This review highlights the hydroelementation reactions of conjugated and separated diynes, which depending on the process conditions, catalytic system, as well as the type of reagents, leads to the formation of various products: enynes, dienes, allenes, polymers, or cyclic compounds. The presence of two triple bonds in the diyne structure makes these compounds important reagents but selective product formation is often difficult owing to problems associated with maintaining appropriate reaction regio- and stereoselectivity. Herein we review this topic to gain knowledge on the reactivity of diynes and to systematise the range of information relating to their use in hydroelementation reactions. The review is divided according to the addition of the E-H (E = Mg, B, Al, Si, Ge, Sn, N, P, O, S, Se, Te) bond to the triple bond(s) in the diyne, as well as to the type of the reagent used, and the product formed. Not only are the hydroelementation reactions comprehensively discussed, but the synthetic potential of the obtained products is also presented. The majority of published research is included within this review, illustrating the potential as well as limitations of these processes, with the intent to showcase the power of these transformations and the obtained products in synthesis and materials chemistry.
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Affiliation(s)
- Jędrzej Walkowiak
- Adam Mickiewicz University in Poznan, Center for Advanced Technology, Uniwersytetu Poznanskiego 10, 61-614, Poznan.
| | - Jakub Szyling
- Adam Mickiewicz University in Poznan, Center for Advanced Technology, Uniwersytetu Poznanskiego 10, 61-614, Poznan. .,Adam Mickiewicz University in Poznan, Faculty of Chemistry, Uniwersytetu Poznanskiego 8, 61-614, Poznan, Poland
| | - Adrian Franczyk
- Adam Mickiewicz University in Poznan, Center for Advanced Technology, Uniwersytetu Poznanskiego 10, 61-614, Poznan.
| | - Rebecca L Melen
- Cardiff Catalysis Institute, Cardiff University, School of Chemistry, Park Place, Main Building, Cardiff CF10 3AT, Cymru/Wales, UK.
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3
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Kim GJ, Mascuch SJ, Mevers E, Boudreau PD, Gerwick WH, Choi H. Luquilloamides, Cytotoxic Lipopeptides from a Puerto Rican Collection of the Filamentous Marine Cyanobacterium Oscillatoria sp. J Org Chem 2021; 87:1043-1055. [PMID: 34967649 DOI: 10.1021/acs.joc.1c02340] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Luquilloamides A-G (1-7) were isolated from a small environmental collection of a marine cyanobacterium found growing on eelgrass (Zostera sp.) near Luquillo, Puerto Rico. Structure elucidation of the luquilloamides was accomplished via detailed NMR and MS analyses, and absolute configurations were determined using a combination of advanced Mosher's method, J-based configuration analysis, semisynthetic fragment analysis derived from ozonolysis, methylation, Baeyer-Villiger oxidation, Mosher's esterification, specific rotations, and ECD data. Except for 2, the luquilloamides share a characteristic tert-butyl-containing polyketide fragment, β-alanine, and a proposed highly modified polyketide extension. While compound 1 is a linear lipopeptide with two α-methyl branches and a vinyl chloride functionality in the polyketide portion, compounds 4, 6, and 7 possess a cyclohexanone structure with methylation on the α- or β-positions of the polyketide as well as an acetyl group. Interestingly, the absolute configuration at C-5 and C-6 on the cyclohexanone unit in 7 is opposite to that of 4-6. Compound 3 was revealed to have a tert-butyl-containing polyketide, β-alanine, and a PKS/NRPS-derived γ-isopropyl pyrrolinone. Compound 2 may be a hydrolysis product of 3. Of the seven new compounds, 1 showed the most potent cytotoxicity to human H-460 lung cancer cells.
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Affiliation(s)
- Geum Jin Kim
- College of Pharmacy and Institute of Cell Culture, Yeungnam University, Gyeongsan 38541, Republic of Korea
| | - Samantha J Mascuch
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, La Jolla, California 92093, United States
| | - Emily Mevers
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, La Jolla, California 92093, United States.,Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Paul D Boudreau
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, La Jolla, California 92093, United States.,Department of BioMolecular Sciences, School of Pharmacy, The University of Mississippi, University, Mississippi 38677, United States
| | - William H Gerwick
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, La Jolla, California 92093, United States.,Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, California 92093, United States
| | - Hyukjae Choi
- College of Pharmacy and Institute of Cell Culture, Yeungnam University, Gyeongsan 38541, Republic of Korea.,Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, La Jolla, California 92093, United States
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4
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Nieto-Sepulveda E, Bage AD, Evans LA, Hunt TA, Leach AG, Thomas SP, Lloyd-Jones GC. Kinetics and Mechanism of the Arase-Hoshi R2BH-Catalyzed Alkyne Hydroboration: Alkenylboronate Generation via B–H/C–B Metathesis. J Am Chem Soc 2019; 141:18600-18611. [DOI: 10.1021/jacs.9b10114] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Eduardo Nieto-Sepulveda
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, United Kingdom
| | - Andrew D. Bage
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, United Kingdom
| | - Louise A. Evans
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, United Kingdom
| | - Thomas A. Hunt
- Medicinal Chemistry, Oncology R&D, AstraZeneca, Cambridge, CB4 0WG, United Kingdom
| | - Andrew G. Leach
- School of Health Sciences, Stopford Building, The University of Manchester, Oxford Road, Manchester M13 9PT, United Kingdom
| | - Stephen P. Thomas
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, United Kingdom
| | - Guy C. Lloyd-Jones
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, United Kingdom
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5
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Cp2TiCl2-catalyzed borylation and hydroboration of α-olefins with dichloro(diisopropylamino)borane. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.07.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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6
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Lang JH, Lindel T. Synthesis of the polyketide section of seragamide A and related cyclodepsipeptides via Negishi cross coupling. Beilstein J Org Chem 2019; 15:577-583. [PMID: 30873243 PMCID: PMC6404460 DOI: 10.3762/bjoc.15.53] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 02/12/2019] [Indexed: 01/22/2023] Open
Abstract
The synthesis of the polyketide section present in the potently cytotoxic marine cyclodepsipeptide jasplakinolide and related natural products, geodiamolides and seragamides, is reported. The key step is a Negishi cross coupling of (R)-(3-methoxy-2-methyl-3-oxopropyl)zinc(II) bromide and an (E)-iodoalkene that was synthesized via an aluminium ester enolate attack at (R)-propylene oxide. The overall synthesis comprises nine steps with an overall yield of 21%. It proved to be possible to liberate the free 8-hydroxynonenoic acid and to couple it with a protected tripeptide composed of L-alanine, N,O-dimethyl-D-iodotyrosine, and TIPS-protected L-threonine, which occurs as partial structure of seragamide A. The tripeptide section of seragamide A was assembled by solution-phase synthesis and an open-chain analogue of the natural product was obtained.
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Affiliation(s)
- Jan Hendrik Lang
- TU Braunschweig, Institute of Organic Chemistry, Hagenring 30, 38106 Braunschweig, Germany
| | - Thomas Lindel
- TU Braunschweig, Institute of Organic Chemistry, Hagenring 30, 38106 Braunschweig, Germany
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7
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Schömberg F, Zi Y, Vilotijevic I. Lewis-base-catalysed selective reductions of ynones with a mild hydride donor. Chem Commun (Camb) 2018. [DOI: 10.1039/c8cc00058a] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Nucleophilic phosphines catalyze efficient 1,2-reductions of ynones employing pinacolborane as a mild hydride donor in the presence of alcohol additives.
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Affiliation(s)
- F. Schömberg
- Institute of Organic Chemistry and Macromolecular Chemistry
- Friedrich Schiller University Jena
- Jena
- Germany
| | - Y. Zi
- Institute of Organic Chemistry and Macromolecular Chemistry
- Friedrich Schiller University Jena
- Jena
- Germany
| | - I. Vilotijevic
- Institute of Organic Chemistry and Macromolecular Chemistry
- Friedrich Schiller University Jena
- Jena
- Germany
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8
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Risi RM, Maza AM, Burke SD. Asymmetric Hydroformylation-Initiated Tandem Sequences for Syntheses of (+)-Patulolide C, (−)-Pyrenophorol, (+)-Decarestrictine L, and (+)-Prelog Djerassi Lactone. J Org Chem 2014; 80:204-16. [DOI: 10.1021/jo502301k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Roberto M. Risi
- Department
of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Andrew M. Maza
- Department
of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Steven D. Burke
- Department
of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
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9
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10
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Lalitha K, Muthusamy K, Prasad YS, Vemula PK, Nagarajan S. Recent developments in β-C-glycosides: synthesis and applications. Carbohydr Res 2014; 402:158-71. [PMID: 25498016 DOI: 10.1016/j.carres.2014.10.008] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Revised: 10/11/2014] [Accepted: 10/16/2014] [Indexed: 11/26/2022]
Abstract
In the last few years, considerable progress has been made in the synthesis of C-glycosides. Despite its challenging chemistry, due to its versatility, C-glycosides play a pivotal role in developing novel materials, surfactants and bioactive molecules. In this review, we present snapshots of various synthetic methodologies developed for C-glycosides in the recent years and the potential application of C-glycosides derived from β-C-glycosidic ketones.
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Affiliation(s)
- Krishnamoorthy Lalitha
- Organic Synthesis Group, Department of Chemistry and the Centre for Nanotechnology and Advanced Biomaterials, School of Chemical and Biotechnology, SASTRA University, Thanjavur 613401, Tamil Nadu, India
| | - Kumarasamy Muthusamy
- Organic Synthesis Group, Department of Chemistry and the Centre for Nanotechnology and Advanced Biomaterials, School of Chemical and Biotechnology, SASTRA University, Thanjavur 613401, Tamil Nadu, India
| | - Y Siva Prasad
- Organic Synthesis Group, Department of Chemistry and the Centre for Nanotechnology and Advanced Biomaterials, School of Chemical and Biotechnology, SASTRA University, Thanjavur 613401, Tamil Nadu, India
| | - Praveen Kumar Vemula
- Technologies for the Advancement of Science, Institute for Stem Cell Biology and Regenerative Medicine (inStem), National Centre for Biological Sciences, UAS-GKVK Post, Bellary Road, Bangalore 560065, India
| | - Subbiah Nagarajan
- Organic Synthesis Group, Department of Chemistry and the Centre for Nanotechnology and Advanced Biomaterials, School of Chemical and Biotechnology, SASTRA University, Thanjavur 613401, Tamil Nadu, India.
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11
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Kanoh N, Kawamata A, Itagaki T, Miyazaki Y, Yahata K, Kwon E, Iwabuchi Y. A Concise and Unified Strategy for Synthesis of the C1–C18 Macrolactone Fragments of FD-891, FD-892 and Their Analogues: Formal Total Synthesis of FD-891. Org Lett 2014; 16:5216-9. [DOI: 10.1021/ol502633j] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Naoki Kanoh
- Graduate School of Pharmaceutical Sciences and ‡Research and Analytical Center
for Giant Molecules, Graduate School of Science, Tohoku University, 6-3
Aza-Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Ayano Kawamata
- Graduate School of Pharmaceutical Sciences and ‡Research and Analytical Center
for Giant Molecules, Graduate School of Science, Tohoku University, 6-3
Aza-Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Tomohiro Itagaki
- Graduate School of Pharmaceutical Sciences and ‡Research and Analytical Center
for Giant Molecules, Graduate School of Science, Tohoku University, 6-3
Aza-Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Yuta Miyazaki
- Graduate School of Pharmaceutical Sciences and ‡Research and Analytical Center
for Giant Molecules, Graduate School of Science, Tohoku University, 6-3
Aza-Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Kenzo Yahata
- Graduate School of Pharmaceutical Sciences and ‡Research and Analytical Center
for Giant Molecules, Graduate School of Science, Tohoku University, 6-3
Aza-Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Eunsang Kwon
- Graduate School of Pharmaceutical Sciences and ‡Research and Analytical Center
for Giant Molecules, Graduate School of Science, Tohoku University, 6-3
Aza-Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Yoshiharu Iwabuchi
- Graduate School of Pharmaceutical Sciences and ‡Research and Analytical Center
for Giant Molecules, Graduate School of Science, Tohoku University, 6-3
Aza-Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
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12
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Hahn F, Kandziora N, Friedrich S, Leadlay PF. Synthesis of complex intermediates for the study of a dehydratase from borrelidin biosynthesis. Beilstein J Org Chem 2014; 10:634-640. [PMID: 24778714 PMCID: PMC3999764 DOI: 10.3762/bjoc.10.55] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Accepted: 01/30/2014] [Indexed: 01/14/2023] Open
Abstract
Herein, we describe the syntheses of a complex biosynthesis-intermediate analogue of the potent antitumor polyketide borrelidin and of reference molecules to determine the stereoselectivity of the dehydratase of borrelidin polyketide synthase module 3. The target molecules were obtained from a common precursor aldehyde in the form of N-acetylcysteamine (SNAc) thioesters and methyl esters in 13 to 15 steps. Key steps for the assembly of the polyketide backbone of the dehydratase substrate analogue were a Yamamoto asymmetric carbocyclisation and a Sakurai allylation as well as an anti-selective aldol reaction. Reference compounds representing the E- and Z-configured double bond isomers as potential products of the dehydratase reaction were obtained from a common precursor aldehyde by Wittig olefination and Still–Gennari olefination. The final deprotection of TBS ethers and methyl esters was performed under mildly acidic conditions followed by pig liver esterase-mediated chemoselective hydrolysis. These conditions are compatible with the presence of a coenzyme A or a SNAc thioester, suggesting that they are generally applicable to the synthesis of complex polyketide-derived thioesters suited for biosynthesis studies.
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Affiliation(s)
- Frank Hahn
- Institut für Organische Chemie und Biomolekulares Wirkstoffzentrum, Leibniz Universität Hannover, Schneiderberg 1B, 30167 Hannover, Germany.,Department of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge CB2 1GA, United Kingdom
| | - Nadine Kandziora
- Institut für Organische Chemie und Biomolekulares Wirkstoffzentrum, Leibniz Universität Hannover, Schneiderberg 1B, 30167 Hannover, Germany
| | - Steffen Friedrich
- Institut für Organische Chemie und Biomolekulares Wirkstoffzentrum, Leibniz Universität Hannover, Schneiderberg 1B, 30167 Hannover, Germany
| | - Peter Francis Leadlay
- Department of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge CB2 1GA, United Kingdom
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13
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Neuhaus CM, Liniger M, Stieger M, Altmann KH. Total Synthesis of the Tubulin Inhibitor WF-1360F Based on Macrocycle Formation through Ring-Closing Alkyne Metathesis. Angew Chem Int Ed Engl 2013; 52:5866-70. [DOI: 10.1002/anie.201300576] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Indexed: 11/12/2022]
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14
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Neuhaus CM, Liniger M, Stieger M, Altmann KH. Totalsynthese des Tubulinhemmers WF-1360F über eine durch Ringschluss-Alkinmetathese vermittelte Makrocyclisierung. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201300576] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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15
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Chatzimpaloglou A, Yavropoulou MP, Rooij KE, Biedermann R, Mueller U, Kaskel S, Sarli V. Total Synthesis and Biological Activity of the Proposed Structure of Phaeosphaeride A. J Org Chem 2012; 77:9659-67. [DOI: 10.1021/jo301662e] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Anthoula Chatzimpaloglou
- Faculty of
Chemistry, Aristotle University of Thessaloniki, University Campus,
54124 Thessaloniki, Greece
| | - Maria P. Yavropoulou
- Department of Endocrinology
and Metabolic Diseases, Leiden University Medical Center, Leiden, Netherlands
| | - Karien E. Rooij
- Department
of Radiology, Leiden University Medical Center, Leiden, Netherlands
| | - Ralf Biedermann
- Department of Inorganic Chemistry, Dresden University of Technology, Mommenstr. 6, 01069
Dresden, Germany
| | - Uwe Mueller
- Department
BESSY-MX Group, F-12, Helmholtz Zentrum Berlin für Materialien und Energie, Albert-Einstein-Str. 15, 12489
Berlin, Germany
| | - Stefan Kaskel
- Department of Inorganic Chemistry, Dresden University of Technology, Mommenstr. 6, 01069
Dresden, Germany
| | - Vasiliki Sarli
- Faculty of
Chemistry, Aristotle University of Thessaloniki, University Campus,
54124 Thessaloniki, Greece
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16
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Zhang FM, Peng L, Li H, Ma AJ, Peng JB, Guo JJ, Yang D, Hou SH, Tu YQ, Kitching W. Total Synthesis of the Nominal Didemnaketal A. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201203406] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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17
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Zhang FM, Peng L, Li H, Ma AJ, Peng JB, Guo JJ, Yang D, Hou SH, Tu YQ, Kitching W. Total Synthesis of the Nominal Didemnaketal A. Angew Chem Int Ed Engl 2012; 51:10846-50. [DOI: 10.1002/anie.201203406] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Revised: 08/28/2012] [Indexed: 02/01/2023]
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18
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Gunanathan C, Hölscher M, Pan F, Leitner W. Ruthenium Catalyzed Hydroboration of Terminal Alkynes to Z-Vinylboronates. J Am Chem Soc 2012; 134:14349-52. [DOI: 10.1021/ja307233p] [Citation(s) in RCA: 196] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chidambaram Gunanathan
- Institut
für Technische Chemie und Makromolekulare Chemie and ‡Institut für
Anorganische Chemie, RWTH Aachen University, Aachen 52074, Germany
| | - Markus Hölscher
- Institut
für Technische Chemie und Makromolekulare Chemie and ‡Institut für
Anorganische Chemie, RWTH Aachen University, Aachen 52074, Germany
| | - Fangfang Pan
- Institut
für Technische Chemie und Makromolekulare Chemie and ‡Institut für
Anorganische Chemie, RWTH Aachen University, Aachen 52074, Germany
| | - Walter Leitner
- Institut
für Technische Chemie und Makromolekulare Chemie and ‡Institut für
Anorganische Chemie, RWTH Aachen University, Aachen 52074, Germany
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19
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China Raju B, Saidachary G, Ashok Kumar J. Wittig homologation of 2-(chloromethyl)-2H-chromen-2-ol derivatives: a new facile synthesis of substituted 2,3-dihydrobenzoxepine-4-carboxylates. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.05.047] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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20
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Newton S, Ley SV, Arcé EC, Grainger DM. Asymmetric Homogeneous Hydrogenation in Flow using a Tube-in-Tube Reactor. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201200073] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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21
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Risi RM, Burke SD. Synthesis of the Prelog-Djerassi lactone via an asymmetric hydroformylation/crotylation tandem sequence. Org Lett 2012; 14:2572-5. [PMID: 22559226 DOI: 10.1021/ol3008765] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A synthesis of the Prelog-Djerassi lactone [(+)-1] has been accomplished in three isolations and 57% overall yield from the known vinyl ortho ester 2. A Rh(I)-catalyzed asymmetric hydroformylation/crotylation tandem sequence has been developed and used to set the C2-C4 stereochemistry. A Rh(I)-catalyzed asymmetric hydrogenation was employed to set the C6 sterechemistry, resulting in an unusually short and efficient enantioselective synthesis of this touchstone molecule from achiral starting material.
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Affiliation(s)
- Roberto M Risi
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706-1322, United States
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22
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Druais V, Meyer C, Cossy J. Catalytic Diastereoselective Reduction of α,β-Epoxy and α,β-Aziridinyl Ynones. Org Lett 2012; 14:516-9. [DOI: 10.1021/ol203114a] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Valérie Druais
- Laboratoire de Chimie Organique, ESPCI ParisTech, CNRS, 10 rue Vauquelin, 75231 Paris Cedex 05, France
| | - Christophe Meyer
- Laboratoire de Chimie Organique, ESPCI ParisTech, CNRS, 10 rue Vauquelin, 75231 Paris Cedex 05, France
| | - Janine Cossy
- Laboratoire de Chimie Organique, ESPCI ParisTech, CNRS, 10 rue Vauquelin, 75231 Paris Cedex 05, France
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Su Z, Peng L, Worthington RJ, Melander C. Evaluation of 4,5-disubstituted-2-aminoimidazole-triazole conjugates for antibiofilm/antibiotic resensitization activity against MRSA and Acinetobacter baumannii. ChemMedChem 2011; 6:2243-51. [PMID: 21928438 DOI: 10.1002/cmdc.201100316] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2011] [Revised: 08/26/2011] [Indexed: 11/10/2022]
Abstract
A library of 4,5-disubstituted-2-aminoimidazole-triazole conjugates (2-AITs) was synthesized, and the antibiofilm activity was investigated. This class of small molecules was found to inhibit biofilm formation by methicillin-resistant Staphylococcus aureus (MRSA) at low-micromolar concentrations; 4,5-disubstituted-2-AITs were also able to inhibit and disperse Acinetobacter baumannii biofilms. The activities of the lead compounds were compared against the naturally occurring biofilm dispersant cis-2-decenoic acid and were revealed to be more potent. The ability of selected compounds to resensitize MRSA to traditional antibiotics (resensitization activity) was also determined. Lead compounds were observed to resensitize MRSA to oxacillin by 2-4-fold.
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Affiliation(s)
- Zhaoming Su
- Department of Chemistry, North Carolina State University, Raleigh, NC 27695-8204, USA
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24
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Srinivasarao M, Kim Y, Li XH, Robbins DW, Fuchs PL. Studies on the Synthesis of Apoptolidin: Synthesis of a C1–C27 Fragment of Apoptolidin D. J Org Chem 2011; 76:7834-41. [PMID: 21827193 DOI: 10.1021/jo200934w] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Madduri Srinivasarao
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Youngsoon Kim
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Xiaojin Harry Li
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Daniel W. Robbins
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Philip L. Fuchs
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
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25
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Larghi EL, Kaufman TS. Synthesis of Oxacycles Employing the Oxa‐Pictet–Spengler Reaction: Recent Developments and New Prospects. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100271] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Enrique L. Larghi
- Institute of Chemistry of Rosario (IQUIR, CONICET‐UNR)and Department of Organic Chemistry, School of Pharmaceuticaland Biochemical Sciences, National University of Rosario, Suipacha 531 (S2002LRK) Rosario, Argentina, Fax: +54‐341‐4370477, ext. 35
| | - Teodoro S. Kaufman
- Institute of Chemistry of Rosario (IQUIR, CONICET‐UNR)and Department of Organic Chemistry, School of Pharmaceuticaland Biochemical Sciences, National University of Rosario, Suipacha 531 (S2002LRK) Rosario, Argentina, Fax: +54‐341‐4370477, ext. 35
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26
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Cosner CC, Helquist P. Concise, Convergent Syntheses of (±)-Trichostatin A Utilizing a Pd-Catalyzed Ketone Enolate α-Alkenylation Reaction. Org Lett 2011; 13:3564-7. [DOI: 10.1021/ol200964m] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Casey C. Cosner
- 251 Nieuwland Science Hall, Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Paul Helquist
- 251 Nieuwland Science Hall, Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
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27
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Reyes S, Huigens RW, Su Z, Simon ML, Melander C. Synthesis and biological activity of 2-aminoimidazole triazoles accessed by Suzuki-Miyaura cross-coupling. Org Biomol Chem 2011; 9:3041-9. [PMID: 21394327 DOI: 10.1039/c0ob00925c] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A pilot library of 2-aminoimidazole triazoles (2-AITs) was synthesized and assayed against Acinetobacter baumannii and methicillin-resistant Staphylococus aureus (MRSA). Results from these studies show that these new derivatives have improved biofilm dispersal activities as well as antibacterial properties against A. baumannii. With MRSA biofilms they are found to possess biofilm inhibition capabilities at low micromolar concentrations.
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Affiliation(s)
- Samuel Reyes
- North Carolina State University, Department of Chemistry, Raleigh, North Carolina 27695-8204, USA
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28
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Giovannini PP, Fantin G, Massi A, Venturi V, Pedrini P. Enzymatic diastereo- and enantioselective synthesis of α-alkyl-α,β-dihydroxyketones. Org Biomol Chem 2011; 9:8038-45. [DOI: 10.1039/c1ob05928a] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Eey STC, Lear MJ. A Bismuth(III)-Catalyzed Friedel−Crafts Cyclization and Stereocontrolled Organocatalytic Approach to (−)-Platensimycin. Org Lett 2010; 12:5510-3. [DOI: 10.1021/ol102390t] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Stanley T.-C. Eey
- Department of Chemistry, Faculty of Science, and Medicinal Chemistry Program of the Life Sciences Institute, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Martin J. Lear
- Department of Chemistry, Faculty of Science, and Medicinal Chemistry Program of the Life Sciences Institute, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
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30
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Vargo TR, Hale JS, Nelson SG. Catalytic Asymmetric Aldol Equivalents in the Enantioselective Synthesis of the Apoptolidin C Aglycone. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201004925] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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31
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Vargo TR, Hale JS, Nelson SG. Catalytic Asymmetric Aldol Equivalents in the Enantioselective Synthesis of the Apoptolidin C Aglycone. Angew Chem Int Ed Engl 2010; 49:8678-81. [DOI: 10.1002/anie.201004925] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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32
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Tsutsumi R, Kuranaga T, Wright JL, Baden DG, Ito E, Satake M, Tachibana K. An improved synthesis of (−)-brevisamide, a marine monocyclic ether amide of dinoflagellate origin. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.06.074] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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33
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Markiewicz JT, Schauer DJ, Löfstedt J, Corden SJ, Wiest O, Helquist P. Synthesis of 4-Methyldienoates Using a Vinylogous Horner−Wadsworth−Emmons Reagent. Application to the Synthesis of Trichostatic Acid. J Org Chem 2010; 75:2061-4. [DOI: 10.1021/jo902422y] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- John T. Markiewicz
- Department of Chemistry and Biochemistry, Walther Cancer Research Center, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, Indiana 46556
| | - Douglas J. Schauer
- Department of Chemistry and Biochemistry, Walther Cancer Research Center, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, Indiana 46556
| | - Joakim Löfstedt
- Department of Chemistry and Biochemistry, Walther Cancer Research Center, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, Indiana 46556
| | - Steven J. Corden
- Department of Chemistry and Biochemistry, Walther Cancer Research Center, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, Indiana 46556
| | - Olaf Wiest
- Department of Chemistry and Biochemistry, Walther Cancer Research Center, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, Indiana 46556
| | - Paul Helquist
- Department of Chemistry and Biochemistry, Walther Cancer Research Center, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, Indiana 46556
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34
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Chatterjee A, Richer J, Hulett T, Iska VBR, Wiest O, Helquist P. An Efficient Synthesis of (±)-Trichostatic Acid and Analogues: A New Route to (±)-Trichostatin A. Org Lett 2010; 12:832-4. [DOI: 10.1021/ol9029116] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Anamitra Chatterjee
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Hall, University of Notre Dame, Indiana 46556
| | - Joshua Richer
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Hall, University of Notre Dame, Indiana 46556
| | - Tyler Hulett
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Hall, University of Notre Dame, Indiana 46556
| | - Vijaya Bhaskara Reddy Iska
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Hall, University of Notre Dame, Indiana 46556
| | - Olaf Wiest
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Hall, University of Notre Dame, Indiana 46556
| | - Paul Helquist
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Hall, University of Notre Dame, Indiana 46556
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35
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Wender PA, Longcore KE. Apoptolidins E and F, new glycosylated macrolactones isolated from Nocardiopsis sp. Org Lett 2010; 11:5474-7. [PMID: 19943700 DOI: 10.1021/ol902308v] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Two new glycosylated macrolactones, apoptolidins E (5) and F (6), were isolated from fermentation of the actinomycete Nocardiopsis sp. and their structures assigned. Lacking the C16 and C20 oxygens of apoptolidin A (1), these macrolides are also the first members of this family to display a 4-O-methyl-l-rhamnose at C9 rather than a 6-deoxy-4-O-methyl-l-glucose.
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Affiliation(s)
- Paul A Wender
- Department of Chemistry and Department of Chemical and Systems Biology, Stanford University, Stanford, California 94305-5080, USA.
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36
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Lewis CA, Longcore KE, Miller SJ, Wender PA. An approach to the site-selective diversification of apoptolidin A with peptide-based catalysts. JOURNAL OF NATURAL PRODUCTS 2009; 72:1864-1869. [PMID: 19769383 PMCID: PMC2857549 DOI: 10.1021/np9004932] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We report the application of peptide-based catalysts to the site-selective modification of apoptolidin A (1), an agent that displays remarkable selectivity for inducing apoptosis in E1A-transformed cell lines. Key to the approach was the development of an assay suitable for the screening of dozens of catalysts in parallel reactions that could be conducted using only microgram quantities of the starting material. Employing this assay, catalysts (e.g., 11 and ent-11) were identified that afforded unique product distributions, distinct from the product mixtures produced when a simple catalyst (N,N-dimethyl-4-aminopyridine (10)) was employed. Preparative reactions were then carried out with the preferred catalysts so that unique, homogeneous apoptolidin analogues could be isolated and characterized. From these studies, three new apoptolidin analogues were obtained (12-14), each differing from the other in either the location of acyl group substituents or the number of acetate groups appended to the natural product scaffold. Biological evaluation of the new apoptolidin analogues was then conducted using growth inhibition assays based on the H292 human lung carcinoma cell line. The new analogues exhibited activities comparable to apoptolidin A.
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Affiliation(s)
- Chad A. Lewis
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107
| | - Kate E. Longcore
- Department of Chemistry and Department of Chemical and Systems Biology, Stanford University, Stanford, California, 94305-5080
| | - Scott J. Miller
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107
| | - Paul A. Wender
- Department of Chemistry and Department of Chemical and Systems Biology, Stanford University, Stanford, California, 94305-5080
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37
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Abstract
A highly convergent, enantioselective total synthesis of the potent antitumor agent apoptolidin A has been completed. The key transformations include highly selective glycosylations to attach the C27 disaccharide and the C9 6'-deoxy-l-glucose, a cross-metathesis to incorporate the C1-C10 trienoate unit, and a Yamaguchi macrolactonization to complete the macrocycle. Twelve stereocenters in the polypropionate segments and sugar units were established through diastereoselective chlorotitanium enolate aldol reactions.
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Affiliation(s)
- Michael T Crimmins
- Venable and Kenan Laboratories of Chemistry, Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, USA.
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38
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Leyva A, Zhang X, Corma A. Chemoselective hydroboration of alkynes vs. alkenes over gold catalysts. Chem Commun (Camb) 2009:4947-9. [DOI: 10.1039/b901953g] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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39
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Ghidu VP, Wang J, Wu B, Liu Q, Jacobs A, Marnett LJ, Sulikowski GA. Synthesis and evaluation of the cytotoxicity of apoptolidinones A and D. J Org Chem 2008; 73:4949-55. [PMID: 18543990 PMCID: PMC2572754 DOI: 10.1021/jo800545r] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2008] [Indexed: 11/28/2022]
Abstract
Apoptolidins A-D are microbial secondary metabolites shown to be selectively cytotoxic against several cancer cell lines and noncytotoxic against normal cells. Total syntheses of apoptolidinones A and D are reported. The efficient synthetic strategy leading to the apoptolidinones features construction of the common 20-membered macrolactone by an intramolecular Suzuki reaction and stereocontrolled aldol reactions establishing the C19/C20 and C22/C23 stereocenters. In contrast to apoptolidin A, the aglycones apoptolidinone A and D were shown to be noncytotoxic when evaluated against human lung cancer cells (H292).
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Affiliation(s)
- Victor P Ghidu
- Department of Chemistry, Institute of Chemical Biology, Vanderbilt University, Nashville, Tennessee 37235-1822, USA
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40
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Handa M, Smith WJ, Roush WR. Studies on the synthesis of apoptolidin A. 2. Synthesis of the disaccharide unit. J Org Chem 2007; 73:1036-9. [PMID: 18163646 DOI: 10.1021/jo7022526] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Disaccharide 3 correspoinding to the disaccharide unit of apoptolidin A has been synthesized via the regio- and stereoselective TBS-OTf-promoted beta-glycosidation reaction of 2,6-dideoxy-2-iodo-beta-glucopyranosyl acetate (5) and p-methoxybenzyl 2,6-dideoxy-2-iodo-3-C-methyl-alpha-mannopyranoside (11).
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Affiliation(s)
- Masaki Handa
- Department of Chemistry, Scripps-Florida, Jupiter, Florida 33458, USA
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