1
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Beller MP, Ivlev S, Koert U. Preussochromone Puzzle: Structural Revision of Preussochromones E and F by Total Synthesis. Org Lett 2022; 24:912-915. [PMID: 35041436 DOI: 10.1021/acs.orglett.1c04261] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A stereoselective synthesis of the proposed and actual structures of the natural products preussochromones E and F is reported. The key step is a ring-closing metathesis to close the five-membered ring and install the trans configuration of the annulated five-six ring system. The analysis of the 3J NMR couplings of the isolated natural product with the synthesized compound revealed its real structure with a cis annulation, which could also be synthesized using an intramolecular aldol reaction of a vic-tricarbonyl compound.
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Affiliation(s)
- Marc Paul Beller
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße 4, D-35032 Marburg, Germany
| | - Sergei Ivlev
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße 4, D-35032 Marburg, Germany
| | - Ulrich Koert
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße 4, D-35032 Marburg, Germany
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2
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Seal AC, Jennings MP. Stereoselective OsO4-mediated dihydroxylation of β-substituted α-trialkylsilyl-β,γ-unsaturated esters. RESULTS IN CHEMISTRY 2021. [DOI: 10.1016/j.rechem.2021.100250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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3
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Su S, Wang C. Molybdenum-Catalyzed Diastereoselective anti-Dihydroxylation of Secondary Allylic Alcohols. Org Lett 2019; 21:2436-2440. [PMID: 30896180 DOI: 10.1021/acs.orglett.9b00735] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In this protocol, we report a Mo-catalyzed anti-dihydroxylation of secondary allylic alcohols, providing a general method for the preparation of 1,2,3-triols bearing up to three continuous stereocenters with excellent diastereocontrol. The mechanistic studies reveal that this dihydroxylation reaction consists of two steps and up to excellent diastereomeric ratios of the final triol products can be achieved due to the high level of both diastereocontrol in the initial epoxidation and regiocontrol in the following hydrolysis in situ.
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Affiliation(s)
- Shixia Su
- Hefei National Laboratory for Physical Science at the Microscale, Department of Chemistry, Center for Excellence in Molecular Synthesis , University of Science and Technology of China , Hefei , Anhui 230026 , P. R. China
| | - Chuan Wang
- Hefei National Laboratory for Physical Science at the Microscale, Department of Chemistry, Center for Excellence in Molecular Synthesis , University of Science and Technology of China , Hefei , Anhui 230026 , P. R. China
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4
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Fan P, Su S, Wang C. Molybdenum-Catalyzed Hydroxyl-Directed Anti-Dihydroxylation of Allylic and Homoallylic Alcohols. ACS Catal 2018. [DOI: 10.1021/acscatal.8b01449] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pei Fan
- Department of Chemistry, Center for Excellence in Molecular Synthesis, Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, P. R. China
| | - Shixia Su
- Department of Chemistry, Center for Excellence in Molecular Synthesis, Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, P. R. China
| | - Chuan Wang
- Department of Chemistry, Center for Excellence in Molecular Synthesis, Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, P. R. China
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5
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Schäfer A, Köhler SC, Lohe M, Wiese M, Hiersemann M. Synthesis of Homoverrucosanoid-Derived Esters and Evaluation as MDR Modulators. J Org Chem 2017; 82:10504-10522. [PMID: 28949536 DOI: 10.1021/acs.joc.7b02012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The synthesis of the A-B-cis,B-C-trans-annulated cyclohepta[e]hydrindane core of a gagunin E analogue is reported in detail. The tricarbocyclic scaffold was assembled starting from an easily accessible A ring building block by a (4 + 2)-cycloaddition for annulation of the B ring. A ring-closing metathesis served for construction of the seven-membered C ring. The angular methyl groups were attached by electrophilic cyclopropanation-ring opening. A library based on the most active lead compound was made accessible by esterification of the terpenols with commercially available acids. A transannular etherification reaction gave access to tetracyclic derivatives of the synthetic inhibitors. The members of the compound library of non-natural homoverrucosanoid-derived esters were examined as modulators of the membrane transporter proteins ABCB1 (P-gp), ABCG2 (BCRP), and ABCC1 (MRP1), which are involved in the formation of multidrug resistance (MDR) in cancer chemotherapy.
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Affiliation(s)
- Andreas Schäfer
- Fakultät für Chemie und Chemische Biologie, Technische Universität Dortmund , 44227 Dortmund, Germany
| | - Sebastian C Köhler
- Pharmazeutisches Institut, Pharmazeutische Chemie II, Universität Bonn , 53121 Bonn, Germany
| | - Markus Lohe
- Fakultät für Chemie und Chemische Biologie, Technische Universität Dortmund , 44227 Dortmund, Germany
| | - Michael Wiese
- Pharmazeutisches Institut, Pharmazeutische Chemie II, Universität Bonn , 53121 Bonn, Germany
| | - Martin Hiersemann
- Fakultät für Chemie und Chemische Biologie, Technische Universität Dortmund , 44227 Dortmund, Germany
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6
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A monocyclic neodysiherbaine analog: Synthesis and evaluation. Bioorg Med Chem Lett 2016; 26:5164-5167. [DOI: 10.1016/j.bmcl.2016.09.074] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Accepted: 09/29/2016] [Indexed: 11/21/2022]
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7
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Borowski D, Zweiböhmer T, Ziegler T. 1,2-Annulated Sugars: Synthesis of Polyhydroxylated 2,10-Dioxadecalins with β-mannoConfiguration. European J Org Chem 2016. [DOI: 10.1002/ejoc.201601050] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Daniel Borowski
- Institute of Organic Chemistry; University of Tuebingen; Auf der Morgenstelle 18 72076 Tuebingen Germany
| | - Tobias Zweiböhmer
- Institute of Organic Chemistry; University of Tuebingen; Auf der Morgenstelle 18 72076 Tuebingen Germany
| | - Thomas Ziegler
- Institute of Organic Chemistry; University of Tuebingen; Auf der Morgenstelle 18 72076 Tuebingen Germany
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8
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Csatayová K, Davies SG, Figuccia AL, Fletcher AM, Ford JG, Lee JA, Roberts PM, Saward BG, Song H, Thomson JE. Asymmetric syntheses of polysubstituted homoprolines and homoprolinols. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.10.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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9
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Willwacher J, Heggen B, Wirtz C, Thiel W, Fürstner A. Total Synthesis, Stereochemical Revision, and Biological Reassessment of Mandelalide A: Chemical Mimicry of Intrafamily Relationships. Chemistry 2015; 21:10416-30. [PMID: 26094957 DOI: 10.1002/chem.201501491] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Indexed: 11/06/2022]
Abstract
Mandelalide A and three congeners had recently been isolated as the supposedly highly cytotoxic principles of an ascidian collected off the South African coastline. Since these compounds are hardly available from the natural source, a concise synthesis route was developed, targeting structure 1 as the purported representation of mandelalide A. The sequence involves an iridium-catalyzed two-directional Krische allylation and a cobalt-catalyzed carbonylative epoxide opening as entry points for the preparation of the major building blocks. The final stages feature the first implementation of terminal acetylene metathesis into natural product total synthesis, which is remarkable in that this class of substrates had been beyond the reach of alkyne metathesis for decades. Synthetic 1, however, proved not to be identical with the natural product. In an attempt to clarify this issue, NMR spectra were simulated for 20 conceivable diastereomers by using DFT followed by DP4 analysis; however, this did not provide a reliable assignment either. The puzzle was ultimately solved by the preparation of three diastereomers, of which compound 6 proved identical with mandelalide A in all analytical and spectroscopic regards. As the entire "northern sector" about the tetrahydrofuran ring in 6 shows the opposite configuration of what had originally been assigned, it is highly likely that the stereostructures of the sister compounds mandelalides B-D must be corrected analogously; we propose that these natural products are accurately represented by structures 68-70. In an attempt to prove this reassignment, an entry into mandelalides C and D was sought by subjecting an advanced intermediate of the synthesis of 6 to a largely unprecedented intramolecular Morita-Baylis-Hillman reaction, which furnished the γ-lactone derivative 74 as a mixture of diastereomers. Whereas (24R)-74 was amenable to a hydroxyl-directed dihydroxylation by using OsO4 /TMEDA as the reagent, the sister compound (24S)-74 did not follow a directed path but simply obeyed Kishi's rule; only this unexpected escape precluded the preparation of mandelalides C and D by this route. A combined spectroscopic and computational (DFT) study showed that the reasons for this strikingly different behavior of the two diastereomers of 74 are rooted in their conformational peculiarities. This aspect apart, our results show that the OsO4 /TMEDA complex reacts preferentially with electron deficient double bonds even if other alkenes are present that are more electron rich and less encumbered. Finally, in a brief biological survey authentic mandelalide A (6) was found to exhibit appreciable cytotoxicity only against one out of three tested human cancer cell lines and all synthetic congeners were hardly active. No significant fungicidal properties were observed.
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Affiliation(s)
- Jens Willwacher
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany)
| | - Berit Heggen
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany)
| | - Conny Wirtz
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany)
| | - Walter Thiel
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany)
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany).
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10
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(S)-Garner aldehyde derived Baylis-Hillman adduct: A potential substrate for the synthesis of D-lyxo phytosphinosine analogue. J CHEM SCI 2015. [DOI: 10.1007/s12039-014-0661-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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11
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Malik M, Ceborska M, Witkowski G, Jarosz S. Ruthenium-catalyzed one-pot ring-closing metathesis/syn-dihydroxylation in the synthesis of bicyclic iminosugars. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.tetasy.2014.11.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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12
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Kanizaj N, McLeod MD. Diastereoselective osmium-catalyzed vicinal oxyamination of acyclic allylic alcohol derivatives. Chirality 2014; 26:724-33. [PMID: 25513679 DOI: 10.1002/chir.22256] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The osmium-catalyzed oxyamination of chiral acyclic allylic alcohol derivatives bearing mono- and 1,1-di-substituted double bonds with benzyl N-(4-tosyloxy)carbamate proceeds with high regioselectivity and moderate levels of diastereoselectivity favoring the anti product. The observed stereoselectivity shows a clear and systematic trend with anti:syn ratios increasing in line with the size of substituent at both the allylic stereocenter and double bond α-carbon. The stereoinduction is in accord with the sense of diastereoselectivity predicted by Kishi's empirical rule and a previously reported transition state model for the osmium-catalyzed dihydroxylation of allylic alcohol derivatives. In contrast, allylic alcohol derivatives bearing trisubstituted double bonds show low or no reactivity in the oxyamination reaction affording the syn product in low yield in the cases examined.
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13
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Jeon J, Shin N, Kim YG. Stereocontrolled Dihydroxylation Reactions of Acyclic Allylic Amines. APPLIED CHEMISTRY FOR ENGINEERING 2014. [DOI: 10.14478/ace.2014.1113] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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14
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Hartung J, Grubbs RH. Catalytic, enantioselective synthesis of 1,2-anti-diols by asymmetric ring-opening/cross-metathesis. Angew Chem Int Ed Engl 2014; 53:3885-8. [PMID: 24554613 PMCID: PMC4037230 DOI: 10.1002/anie.201310767] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Indexed: 01/14/2023]
Abstract
An enantioselective method for the synthesis of 1,2-anti-diols has been developed. A cyclometalated chiral-at-ruthenium complex catalyzes the asymmetric ring-opening/cross-metathesis of dioxygenated cyclobutenes, thus resulting in functionally rich synthetic building blocks. Syntheses of the insect pheromone (+)-endo-brevicomin and monosaccharide ribose demonstrate the synthetic utility of the 1,2-anti-diol fragments generated in the title reaction.
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Affiliation(s)
- John Hartung
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125
| | - Robert H. Grubbs
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125
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15
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Hartung J, Grubbs RH. Catalytic, Enantioselective Synthesis of 1,2-anti-Diols by Asymmetric Ring-Opening/Cross-Metathesis. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201310767] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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16
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Singh P, Manna SK, Panda G. Synthesis of polyhydroxylated indolizidines and piperidines from Garner's aldehyde: total synthesis of (−)-swainsonine, (+)-1,2-di-epi-swainsonine, (+)-8,8a-di-epi-castanospermine, pentahydroxy indolizidines, (−)-1-deoxynojirimycin, (−)-1-deoxy-altro-nojirimycin, and related diversity. Tetrahedron 2014. [DOI: 10.1016/j.tet.2013.11.074] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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17
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Saka T, Okaki T, Ifuku S, Yamashita Y, Sato K, Miyawaki S, Kamori A, Kato A, Adachi I, Tezuka Y, Kiria PG, Onomura O, Minato D, Sugimoto K, Matsuya Y, Toyooka N. Synthesis of phenylalkyl-substituted polyhydroxypiperidines as potent inhibitors for α-l-fucosidase. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.10.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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18
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Synthesis and biological evaluation of N-(2-fluorophenyl)-2β-deoxyfuconojirimycin acetamide as a potent inhibitor for α-l-fucosidases. Bioorg Med Chem 2013; 21:6565-73. [DOI: 10.1016/j.bmc.2013.08.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2013] [Revised: 08/13/2013] [Accepted: 08/14/2013] [Indexed: 11/23/2022]
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19
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Leonori D, Seeberger PH. De novo synthesis of D- and L-fucosamine containing disaccharides. Beilstein J Org Chem 2013; 9:332-41. [PMID: 23503315 PMCID: PMC3596053 DOI: 10.3762/bjoc.9.38] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2012] [Accepted: 01/16/2013] [Indexed: 12/27/2022] Open
Abstract
The availability of rare monosaccharides that cannot be isolated from natural sources is currently limiting the access to the synthesis and the biological evaluation of complex bacterial cell-surface glycans. Here, we report the synthesis of D- and L-fucosamine building blocks by a de novo approach from L- and D-Garner aldehydes. These differentially protected monosaccharide building blocks were utilized to prepare disaccharides present on the surface of Pseudomonas aeruginosa bacteria.
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Affiliation(s)
- Daniele Leonori
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam, Germany
| | - Peter H Seeberger
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam, Germany
- Institute for Chemistry and Biochemistry, Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany
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20
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El-Mansy MF, Sar A, Lindeman S, Donaldson WA. Generation of Molecular Complexity from Cyclooctatetraene: Preparation of Optically Active Protected Aminocycloheptitols and Bicyclo[4.4.1]undecatriene. Chemistry 2013; 19:2330-6. [DOI: 10.1002/chem.201203754] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Indexed: 11/11/2022]
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21
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Nowogródzki M, Malik M, Jarosz S. Synthesis of highly oxygenated decalins from sugar allyltins: an access to sulfur and phosphorus derivatives. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.tetasy.2012.09.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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22
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Gampe CM, Carreira EM. Cyclohexyne cycloinsertion in the divergent synthesis of guanacastepenes. Chemistry 2012; 18:15761-71. [PMID: 23080228 DOI: 10.1002/chem.201202222] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2012] [Indexed: 12/20/2022]
Abstract
The guanacastepenes are a family of 15 diterpenes that share a common 5-6-7 tricyclic core, which is decorated with quaternary centers, unsaturation, hydroxyl and carbonyl groups. Some of these natural products show interesting antimicrobial potency. Their collective structural and biological features have stirred up vibrant activity among organic chemists. Herein, we disclose an account of our studies toward the synthesis of a number of guanacastepenes. The synthetic strategy relies on the use of cyclohexyne in a cycloinsertion reaction to rapidly construct the guanacastepene core. Isolation of a cyclobutenol as intermediate in the cyclohexyne cycloinsertion provided us with the possibility to study further the reactivity of this metastable compound, and we uncovered novel rearrangements and ring-opening reactions. Stereoselective, late-stage oxidative diversification of the carbon scaffold allowed the synthesis of guanacastepenes N and O and paved the way for the synthesis of guanacastepenes H and D.
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23
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Masruri, Willis AC, McLeod MD. Osmium-Catalyzed Vicinal Oxyamination of Alkenes by N-(4-Toluenesulfonyloxy)carbamates. J Org Chem 2012; 77:8480-91. [DOI: 10.1021/jo301372y] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Masruri
- Research School of Chemistry, Australian National University, Canberra ACT 0200,
Australia
- Department of
Chemistry, University of Brawijaya, Malang,
Indonesia
| | - Anthony C. Willis
- Research School of Chemistry, Australian National University, Canberra ACT 0200,
Australia
| | - Malcolm D. McLeod
- Research School of Chemistry, Australian National University, Canberra ACT 0200,
Australia
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24
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Leonori D, Seeberger PH. De Novo Synthesis of the Bacterial 2-Amino-2,6-Dideoxy Sugar Building Blocks d-Fucosamine, d-Bacillosamine, and d-Xylo-6-deoxy-4-ketohexosamine. Org Lett 2012; 14:4954-7. [DOI: 10.1021/ol3023227] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Daniele Leonori
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam, Germany, and Institute for Chemistry and Biochemistry, Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany
| | - Peter H. Seeberger
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam, Germany, and Institute for Chemistry and Biochemistry, Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany
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25
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Pardo LM, Tellitu I, Domínguez E. Application of the intramolecular PIFA-mediated amidation of alkynes to the synthesis of substituted indolizidinones. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.03.033] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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26
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Yang JA, Murphy CJ. Evidence for patchy lipid layers on gold nanoparticle surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:5404-5416. [PMID: 22352432 DOI: 10.1021/la300325p] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Gold nanoparticles bearing multiple surface ligands are becoming favored candidates as multifunctional targeting, imaging, and therapeutic vehicles for biomedicine. The question of spatial location of different ligands on nanoparticle surfaces, especially with those of diameters less than 100 nm, is an important one that is difficult to quantitatively address. Here we functionalize the surface of 20, 50, and 90 nm gold nanoparticles with two different lipids, both single and mixed, using two different surface chemical procedures. Mass spectrometry supports the presence of both lipids in the mixed-lipid systems on nanoparticles, while electron microscopy evidence shows domain sizes for one lipid apparently a quarter to a half the projected diameter for 50 and 90 nm particles; but for 20 nm particles, there is no evidence for the existence of patches of the two lipids. Larger gold nanoparticles (90 nm) can be decorated with an array of 12 nm gold nanoparticles by use of a third lipid and antibody-antigen connectors; the display of the 12 nm particles about the 90 nm particles can be controlled to some extent by the initial surface chemistry and is quantified via a new angle analysis procedure.
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Affiliation(s)
- Jie An Yang
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, USA
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27
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Vega-Pérez JM, Palo-Nieto C, Periñán I, Vega-Holm M, Calderón-Montaño JM, López-Lázaro M, Iglesias-Guerra F. Stereoselective Dihydroxylation Reaction of Alkenyl β-D-Hexopyranosides: A Methodology for the Synthesis of Glycosylglycerol Derivatives and 1-O-Acyl-3-O-β-D-glycosyl-sn-glycerol Analogues. European J Org Chem 2011. [DOI: 10.1002/ejoc.201101539] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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28
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Peed J, Davies IR, Peacock LR, Taylor JE, Kociok-Köhn G, Bull SD. Dihydroxylation-Based Approach for the Asymmetric Syntheses of Hydroxy-γ-butyrolactones. J Org Chem 2011; 77:543-55. [PMID: 22077239 DOI: 10.1021/jo2021289] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Jennifer Peed
- Department
of Chemistry, University of Bath, Claverton
Down, Bath, BA2 7AY,
United Kingdom
| | - Iwan R. Davies
- Department
of Chemistry, University of Bath, Claverton
Down, Bath, BA2 7AY,
United Kingdom
| | - Lucy R. Peacock
- Department
of Chemistry, University of Bath, Claverton
Down, Bath, BA2 7AY,
United Kingdom
| | - James E. Taylor
- Department
of Chemistry, University of Bath, Claverton
Down, Bath, BA2 7AY,
United Kingdom
| | - Gabriele Kociok-Köhn
- Department
of Chemical Crystallography, University of Bath, Claverton Down, Bath, BA2 7AY,
United Kingdom
| | - Steven D. Bull
- Department
of Chemistry, University of Bath, Claverton
Down, Bath, BA2 7AY,
United Kingdom
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29
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Singh A, Kim B, Lee WK, Ha HJ. Asymmetric synthesis of 1-deoxyazasugars from chiral aziridines. Org Biomol Chem 2011; 9:1372-80. [DOI: 10.1039/c0ob00730g] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Markó IE, Giles PR, Janousek Z, Hindley NJ, Declercq JP, Tinant B, Feneau-Dupont J, Svendsen JS. Syn-Stereocontrolled dihydroxylation of Baylis-Hillman adducts. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/recl.19951140418] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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31
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Paquette LA, Moura-Letts G, Wang GP. From D-glucose to enantiomerically pure cycloctanoses. The glycosidase inhibitory capacity of medium-ring carbasugars. J Org Chem 2010; 74:2099-107. [PMID: 19173597 DOI: 10.1021/jo802620h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Exhaustive dihydroxylation of the pair of cyclooctadienols consisting of 4 and 5, which are available in enantiomerically pure form from d-glucose, resulted in the formation of two diastereomeric tetraols in each case. The difference in polarity of the 6/7 and 8/9 pairs facilitated their chromatographic separation. Ensuing acetylation and PMB deprotection allowed for the assignment of relative (and ultimately absolute) stereochemistry to the resulting monohydric alcohols on the basis of J(HH) analysis of their (1)H NMR spectra. The highly functionalized exomethylenecyclooctanes 14-17, which were derived by periodinane oxidation and Wittig olefination, were further elaborated by hydroboration and global deprotection. The eight members of the cyclooctanose family of carbasugars and their precursor intermediates consistently showed patterns of J(HH) values in line with the contiguous stereochemical relationships. Also assayed was their specific inhibitory behavior toward glycosidases.
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Affiliation(s)
- Leo A Paquette
- Evans Chemical Laboratories, The Ohio State University, Columbus, Ohio 43210, USA.
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32
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Sar A, Lindeman S, Donaldson WA. De novo synthesis of polyhydroxyl aminocyclohexanes. Org Biomol Chem 2010; 8:3908-17. [PMID: 20623062 DOI: 10.1039/c004730a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The syntheses of 12 stereochemically diverse polyhydroxyl aminocyclohexane ("aminocyclitols") derivatives are described. These short syntheses require 2-5 steps from N-(2,4-cyclohexadien-1-yl)phthalimide, which is prepared in two steps from tricarbonyl(cyclohexadienyl)iron(1+). The relative stereochemistries of the aminocyclitols were assigned by (1)H NMR spectroscopy as well as X-ray diffraction analysis.
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Affiliation(s)
- Anobick Sar
- Department of Chemistry, Marquette University, P. O. Box 1881, Milwaukee, WI, USA
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33
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Prévost M, Ziller JW, Woerpel KA. Strained organosilacyclic compounds: synthesis of anti-Bredt olefins and trans-dioxasilacyclooctenes. Dalton Trans 2010; 39:9275-81. [PMID: 20614083 DOI: 10.1039/c003227a] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Insertions of silylenes into the allylic carbon-oxygen bond of vinyl epoxides was shown to generate 1,2-silaoxetanes. These intermediates undergo highly diastereoselective additions to aldehydes to form anti-Bredt olefins and trans-dioxasilacyclooctenes. Additions of electrophiles could be performed selectively on the outside face of these strained trans-cycloalkenes to provide valuable functionalized compounds.
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Affiliation(s)
- Michel Prévost
- Department of Chemistry, University of California, Irvine, California 92697-2025, USA
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34
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Hamed O, Henry PM, Becker DP. Palladium(II)-catalyzed dicarboxymethylation of chiral allylic alcohols: chirality transfer affording optically active diesters containing three contiguous chiral centers. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.04.105] [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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35
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36
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Karjalainen OK, Passiniemi M, Koskinen AMP. Short and Straightforward Synthesis of (−)-1-Deoxygalactonojirimycin. Org Lett 2010; 12:1145-7. [DOI: 10.1021/ol100037c] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Oskari K. Karjalainen
- Aalto University School of Science and Technology, Faculty of Chemistry and Materials Sciences, Department of Chemistry, P.O. Box 16100, FI-00076 Aalto, Finland
| | - Mikko Passiniemi
- Aalto University School of Science and Technology, Faculty of Chemistry and Materials Sciences, Department of Chemistry, P.O. Box 16100, FI-00076 Aalto, Finland
| | - Ari M. P. Koskinen
- Aalto University School of Science and Technology, Faculty of Chemistry and Materials Sciences, Department of Chemistry, P.O. Box 16100, FI-00076 Aalto, Finland
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37
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Srihari P, Kumaraswamy B, Rao GM, Yadav JS. First stereoselective total synthesis of (−)-stagonolide A. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2009.12.015] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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38
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Mehta G, Sen S. From aromatics to conjoined inositols: stereoselective oxyfunctionalization of anthracene. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2009.11.054] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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39
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Sridhar R, Srinivas B, Rao KR. Asymmetric synthesis of triacetyl-d-erythro-sphingosine and D-1-deoxyallonojirimycin via Miyashita C2 selective endo-mode azide opening of 2,3-epoxy alcohol. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.10.035] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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40
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Prévost M, Woerpel KA. Insertions of silylenes into vinyl epoxides: diastereoselective synthesis of functionalized, optically active trans-dioxasilacyclooctenes. J Am Chem Soc 2009; 131:14182-3. [PMID: 19769355 DOI: 10.1021/ja906204a] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This communication describes a direct route to functionalized nonracemic trans-dioxasilacyclooctenes that involves stereoselective silylene insertions into vinyl epoxides to provide vinyl silaoxetane intermediates. These strained allylic silanes then undergo uncatalyzed allylation of aldehydes to afford trans-dioxasilacyclooctenes. Diastereoselective additions to these alkenes allow efficient transfer of planar chirality to chirality at stereogenic carbon atoms.
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Affiliation(s)
- Michel Prévost
- Department of Chemistry, University of California, Irvine, California 92697-2025, USA
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41
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Avi M, Gaisberger R, Feichtenhofer S, Griengl H. De novo synthesis of pentoses via cyanohydrins as key intermediates. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.04.048] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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42
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Fernández de la Pradilla R, Lwoff N, Viso A. Stereoselective Functionalization of Dihydropyran-3-ols: Application to the Synthesis of Enantiopure Ethyl Deoxymonate B. European J Org Chem 2009. [DOI: 10.1002/ejoc.200801133] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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43
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Tian YS, Joo JE, Kong BS, Pham VT, Lee KY, Ham WH. Asymmetric Synthesis of (−)-Swainsonine. J Org Chem 2009; 74:3962-5. [DOI: 10.1021/jo802800d] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yong-Shou Tian
- College of Pharmacy, Sung Kyun Kwan University, Suwon 440-746, Korea, and Yonsung Fine Chemicals Co., Ltd., 129-9 Suchon-ri, Jangan-myeon, Hwaseong-si, Gyeonggi-do 445-944, Korea
| | - Jae-Eun Joo
- College of Pharmacy, Sung Kyun Kwan University, Suwon 440-746, Korea, and Yonsung Fine Chemicals Co., Ltd., 129-9 Suchon-ri, Jangan-myeon, Hwaseong-si, Gyeonggi-do 445-944, Korea
| | - Bae-Soo Kong
- College of Pharmacy, Sung Kyun Kwan University, Suwon 440-746, Korea, and Yonsung Fine Chemicals Co., Ltd., 129-9 Suchon-ri, Jangan-myeon, Hwaseong-si, Gyeonggi-do 445-944, Korea
| | - Van-Thoai Pham
- College of Pharmacy, Sung Kyun Kwan University, Suwon 440-746, Korea, and Yonsung Fine Chemicals Co., Ltd., 129-9 Suchon-ri, Jangan-myeon, Hwaseong-si, Gyeonggi-do 445-944, Korea
| | - Kee-Young Lee
- College of Pharmacy, Sung Kyun Kwan University, Suwon 440-746, Korea, and Yonsung Fine Chemicals Co., Ltd., 129-9 Suchon-ri, Jangan-myeon, Hwaseong-si, Gyeonggi-do 445-944, Korea
| | - Won-Hun Ham
- College of Pharmacy, Sung Kyun Kwan University, Suwon 440-746, Korea, and Yonsung Fine Chemicals Co., Ltd., 129-9 Suchon-ri, Jangan-myeon, Hwaseong-si, Gyeonggi-do 445-944, Korea
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44
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Shiina I, Fukui H. Chemistry and structural determination of botcinolides, botcinins, and botcinic acids. Chem Commun (Camb) 2009:385-400. [DOI: 10.1039/b814375g] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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45
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Fukui H, Shiina I. Total Synthesis of Botcinolides and Botcinins; Determination of the Structure of Natural Products Isolated from Botrytis cinerea. J SYN ORG CHEM JPN 2009. [DOI: 10.5059/yukigoseikyokaishi.67.628] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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46
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Moura-Letts G, Paquette LA. Contiguously Substituted Cyclooctane Polyols. Configurational Assignments via 1H NMR Correlations and Symmetry Considerations. J Org Chem 2008; 73:7663-70. [DOI: 10.1021/jo801443d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Gustavo Moura-Letts
- Evans Chemical Laboratories, The Ohio State University, Columbus, Ohio 43210
| | - Leo A. Paquette
- Evans Chemical Laboratories, The Ohio State University, Columbus, Ohio 43210
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47
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Pacheco MC, Purser S, Gouverneur V. The chemistry of propargylic and allylic fluorides. Chem Rev 2008; 108:1943-81. [PMID: 18543877 DOI: 10.1021/cr068410e] [Citation(s) in RCA: 121] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M Carmen Pacheco
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, OX1 3TA Oxford, UK
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48
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Synthesis of C-disaccharides via a hetero-Diels–Alder reaction and further stereocontrolled transformations. Carbohydr Res 2008; 343:1754-65. [DOI: 10.1016/j.carres.2008.03.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2008] [Revised: 03/05/2008] [Accepted: 03/09/2008] [Indexed: 11/17/2022]
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49
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Krishna PR, Reddy PS. “Diversity Oriented Synthesis” of Functionalized Chiral Tetrahydropyridines: Potential GABA Receptor Agonists and Azasugars from Natural Amino Acids via a Sequential Baylis−Hillman Reaction and RCM Protocol. ACTA ACUST UNITED AC 2008; 10:426-35. [DOI: 10.1021/cc700171p] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Palakodety Radha Krishna
- D-206/B, Discovery Laboratory, Organic Chemistry Division III, Indian Institute of Chemical Technology, Hyderabad 500 007, India
| | - P. Srinivas Reddy
- D-206/B, Discovery Laboratory, Organic Chemistry Division III, Indian Institute of Chemical Technology, Hyderabad 500 007, India
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50
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Quan W, Yu B, Zhang J, Liang Q, She X, Pan X. Facile total synthesis of the (−)-Heliconol A. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.07.053] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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