51
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Chen Y. Recent Advances in Methylation: A Guide for Selecting Methylation Reagents. Chemistry 2018; 25:3405-3439. [DOI: 10.1002/chem.201803642] [Citation(s) in RCA: 119] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Yantao Chen
- Medicinal Chemistry, Cardiovascular, Renal and Metabolism, IMED Biotech UnitAstraZeneca Gothenburg Sweden
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52
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Wilkinson A, Lattmann E, Roces CB, Pedersen GK, Christensen D, Perrie Y. Lipid conjugation of TLR7 agonist Resiquimod ensures co-delivery with the liposomal Cationic Adjuvant Formulation 01 (CAF01) but does not enhance immunopotentiation compared to non-conjugated Resiquimod+CAF01. J Control Release 2018; 291:1-10. [PMID: 30291987 DOI: 10.1016/j.jconrel.2018.10.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Revised: 09/30/2018] [Accepted: 10/01/2018] [Indexed: 01/12/2023]
Abstract
Pattern recognition receptors, including the Toll-like receptors (TLRs), are important in the induction and activation of two critical arms of the host defence to pathogens and microorganisms: the rapid innate immune response (as characterised by the production of Th1 promoting cytokines and type 1 interferons) and the adaptive immune response. Through this activation, ligands and agonists of TLRs can enhance immunotherapeutic efficacy. Resiquimod is a small (water-soluble) agonist of the endosome-located Toll-like receptors 7 and 8 (TLR7/8). However due to its molecular attributes it rapidly distributes throughout the body after injection. To circumvent this, these TLR agonists can be incorporated within delivery systems, such as liposomes, to promote the co-delivery of both antigen and agonists to antigen presenting cells. In this present study, resiquimod has been chemically conjugated to a lipid to form a lipid-TLR7/8 agonist conjugate which can be incorporated within immunogenic cationic liposomes composed of dimethyldioctadecylammonium bromide (DDA) and the immunostimulatory glycolipid trehalose 6,6' - dibehenate (TDB). This DDA:TDB-TLR7/8 formulation offers similar vesicle characteristics to DDA:TDB (size and charge) and offers high retention of both resiquimod and the electrostatically adsorbed TB subunit antigen Ag85B-ESAT6-Rv2660c (H56). Following immunisation through the intramuscular (i.m.) route, these cationic DDA:TDB-TLR7/8 liposomes form a vaccine depot at the injection site. However, immunisation studies have shown that this biodistribution does not translate into notably increased antibody nor Th1 responses at the spleen and draining popliteal lymph node compared to DDA:TDB liposomes. This work demonstrates that the conjugation of TLR7/8 agonists to cationic liposomes can promote co-delivery but the immune responses stimulated do not merit the added complexity considerations of the formulation.
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Affiliation(s)
| | - Eric Lattmann
- School of Life and Health Sciences, Aston University, Birmingham, UK
| | - Carla B Roces
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral St, Glasgow G4 0RE, UK
| | - Gabriel K Pedersen
- Department of Infectious Disease Immunology, Statens Serum Institute, Copenhagen, Denmark
| | - Dennis Christensen
- Department of Infectious Disease Immunology, Statens Serum Institute, Copenhagen, Denmark
| | - Yvonne Perrie
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral St, Glasgow G4 0RE, UK.
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53
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März M, Kohout M, Neveselý T, Chudoba J, Prukała D, Niziński S, Sikorski M, Burdziński G, Cibulka R. Azodicarboxylate-free esterification with triphenylphosphine mediated by flavin and visible light: method development and stereoselectivity control. Org Biomol Chem 2018; 16:6809-6817. [PMID: 30203820 DOI: 10.1039/c8ob01822g] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Triphenylphosphine (Ph3P) activated by various electrophiles (e.g., alkyl diazocarboxylates) represents an effective mediator of esterification and other nucleophilic substitution reactions. We report herein an aza-reagent-free procedure using flavin catalyst (3-methyl riboflavin tetraacetate), triphenylphosphine, and visible light (448 nm), which allows effective esterification of aromatic and aliphatic carboxylic acids with alcohols. Mechanistic study confirmed that photoinduced electron transfer from triphenylphosphine to excited flavin with the formation of Ph3P˙+ is a crucial step in the catalytic cycle. This allows reactive alkoxyphosphonium species to be generated by reaction of an alcohol with Ph3P˙+ followed by single-electron oxidation. Unexpected stereoselectivity control by the solvent was observed, allowing switching from inversion to retention of configuration during esterification of (S)- or (R)-1-phenylethanol; for example with phenylacetic acid, the ratio shifting from 10 : 90 (retention : inversion) in trifluoromethylbenzene to 99.9 : 0.1 in acetonitrile. Our method uses nitrobenzene to regenerate the flavin photocatalyst. This new approach to flavin re-oxidation has also been successfully proved in benzyl alcohol oxidation, which is a "standard" process among flavin-mediated photooxidations.
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Affiliation(s)
- Michal März
- Department of Organic Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague, Czech Republic.
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54
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Motsch S, Schütz C, Huy PH. Systematic Evaluation of Sulfoxides as Catalysts in Nucleophilic Substitutions of Alcohols. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800907] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Sebastian Motsch
- Institute of Organic Chemistry; Saarland University; P. O. Box 151150 66041 Saarbrücken Germany
| | - Christian Schütz
- Institute of Organic Chemistry; Saarland University; P. O. Box 151150 66041 Saarbrücken Germany
| | - Peter H. Huy
- Institute of Organic Chemistry; Saarland University; P. O. Box 151150 66041 Saarbrücken Germany
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55
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Heravi MM, Ghalavand N, Ghanbarian M, Mohammadkhani L. Applications of Mitsunobu Reaction in total synthesis of natural products. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4464] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Majid M. Heravi
- Department of Chemistry; Alzahra University; Vanak, P.O. Box 1993893973 Tehran Iran
| | - Nastaran Ghalavand
- Department of Chemistry; Alzahra University; Vanak, P.O. Box 1993893973 Tehran Iran
| | - Manizheh Ghanbarian
- Department of Chemistry; Alzahra University; Vanak, P.O. Box 1993893973 Tehran Iran
| | - Leyla Mohammadkhani
- Department of Chemistry; Alzahra University; Vanak, P.O. Box 1993893973 Tehran Iran
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56
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Han X, Saleh N, Retailleau P, Voituriez A. Phosphine-Catalyzed Reaction between 2-Aminobenzaldehydes and Dialkyl Acetylenedicarboxylates: Synthesis of 1,2-Dihydroquinoline Derivatives and Toward the Development of an Olefination Reaction. Org Lett 2018; 20:4584-4588. [DOI: 10.1021/acs.orglett.8b01870] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Xu Han
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1 av. de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Nidal Saleh
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1 av. de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Pascal Retailleau
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1 av. de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Arnaud Voituriez
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1 av. de la Terrasse, 91198 Gif-sur-Yvette, France
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57
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Hain J, Rollin P, Klaffke W, Lindhorst TK. Anomeric modification of carbohydrates using the Mitsunobu reaction. Beilstein J Org Chem 2018; 14:1619-1636. [PMID: 30013688 PMCID: PMC6036978 DOI: 10.3762/bjoc.14.138] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 06/06/2018] [Indexed: 11/23/2022] Open
Abstract
The Mitsunobu reaction basically consists in the conversion of an alcohol into an ester under inversion of configuration, employing a carboxylic acid and a pair of two auxiliary reagents, mostly triphenylphosphine and a dialkyl azodicarboxylate. This reaction has been frequently used in carbohydrate chemistry for the modification of sugar hydroxy groups. Modification at the anomeric position, leading mainly to anomeric esters or glycosides, is of particular importance in the glycosciences. Therefore, this review focuses on the use of the Mitsunobu reaction for modifications of sugar hemiacetals. Strikingly, unprotected sugars can often be converted regioselectively at the anomeric center, whereas in other cases, the other hydroxy groups in reducing sugars have to be protected to achieve good results in the Mitsunobu procedure. We have reviewed on the one hand the literature on anomeric esterification, including glycosyl phosphates, and on the other hand glycoside synthesis, including S- and N-glycosides. The mechanistic details of the Mitsunobu reaction are discussed as well as this is important to explain and predict the stereoselectivity of anomeric modifications under Mitsunobu conditions. Though the Mitsunobu reaction is often not the first choice for the anomeric modification of carbohydrates, this review shows the high value of the reaction in many different circumstances.
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Affiliation(s)
- Julia Hain
- Christiana Albertina University of Kiel, Otto Diels Institute of Organic Chemistry, Otto-Hahn-Platz 3–4, D-24118 Kiel, Germany, Fax: +49 431 8807410
| | - Patrick Rollin
- Université d’Orléans et CNRS, ICOA, UMR 7311, BP 6759, 45067 Orléans, France, Fax: +33 238 417281
| | - Werner Klaffke
- Haus der Technik e.V., Hollestr. 1, 45127 Essen, Germany, Fax: +49 201 1803269
| | - Thisbe K Lindhorst
- Christiana Albertina University of Kiel, Otto Diels Institute of Organic Chemistry, Otto-Hahn-Platz 3–4, D-24118 Kiel, Germany, Fax: +49 431 8807410
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58
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Platella C, Musumeci D, Arciello A, Doria F, Freccero M, Randazzo A, Amato J, Pagano B, Montesarchio D. Controlled Pore Glass-based oligonucleotide affinity support: towards High Throughput Screening methods for the identification of conformation-selective G-quadruplex ligands. Anal Chim Acta 2018; 1030:133-141. [PMID: 30032762 DOI: 10.1016/j.aca.2018.04.071] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 04/27/2018] [Accepted: 04/30/2018] [Indexed: 10/17/2022]
Abstract
Target selectivity is one of the main challenges in the search for small molecules able to act as effective and non-toxic anticancer and/or antiviral drugs. To achieve this goal, handy, rapid and reliable High Throughput Screening methodologies are needed. We here describe a novel functionalization for the solid phase synthesis of oligonucleotides on Controlled Pore Glass, including a flexible hexaethylene glycol spacer linking the first nucleoside through the nucleobase via a covalent bond stable to the final deprotection step. This allowed us preparing fully deprotected oligonucleotides still covalently attached to their supports. In detail, on this support we performed both the on-line synthesis of different secondary structure-forming oligonucleotides and the affinity chromatography-based screenings of conformation-selective G-quadruplex ligands. By using a fluorescent core-extended naphthalene diimide with different emitting response upon binding to sequences folding into G-quadruplexes of different topologies, we have been able to discriminate not only G-quadruplex vs. duplex DNA structures, but also different G-quadruplex conformations on the glass beads by confocal microscopy.
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Affiliation(s)
- Chiara Platella
- Department of Chemical Sciences, University of Naples Federico II, via Cintia 21, 80126, Naples, Italy
| | - Domenica Musumeci
- Department of Chemical Sciences, University of Naples Federico II, via Cintia 21, 80126, Naples, Italy
| | - Angela Arciello
- Department of Chemical Sciences, University of Naples Federico II, via Cintia 21, 80126, Naples, Italy
| | - Filippo Doria
- Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100, Pavia, Italy
| | - Mauro Freccero
- Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100, Pavia, Italy
| | - Antonio Randazzo
- Department of Pharmacy, University of Naples Federico II, via D. Montesano 49, 80131, Naples, Italy
| | - Jussara Amato
- Department of Pharmacy, University of Naples Federico II, via D. Montesano 49, 80131, Naples, Italy
| | - Bruno Pagano
- Department of Pharmacy, University of Naples Federico II, via D. Montesano 49, 80131, Naples, Italy
| | - Daniela Montesarchio
- Department of Chemical Sciences, University of Naples Federico II, via Cintia 21, 80126, Naples, Italy.
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59
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Huy PH, Filbrich I. A General Catalytic Method for Highly Cost- and Atom-Efficient Nucleophilic Substitutions. Chemistry 2018; 24:7410-7416. [PMID: 29508466 DOI: 10.1002/chem.201800588] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Indexed: 02/05/2023]
Abstract
A general formamide-catalyzed protocol for the efficient transformation of alcohols into alkyl chlorides, which is promoted by substoichiometric amounts (down to 34 mol %) of inexpensive trichlorotriazine (TCT), is introduced. This is the first example of a TCT-mediated dihydroxychlorination of an OH-containing substrate (e.g., alcohols and carboxylic acids) in which all three chlorine atoms of TCT are transferred to the starting material. The consequently enhanced atom economy facilitates a significantly improved waste balance (E-factors down to 4), cost efficiency, and scalability (>50 g). Furthermore, the current procedure is distinguished by high levels of functional-group compatibility and stereoselectivity, as only weakly acidic cyanuric acid is released as exclusive byproduct. Finally, a one-pot protocol for the preparation of amines, azides, ethers, and sulfides enabled the synthesis of the drug rivastigmine with twofold SN 2 inversion, which demonstrates the high practical value of the presented method.
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Affiliation(s)
- Peter H Huy
- Institute of Organic Chemistry, Saarland University, P. O. Box 151150, 66041, Saarbruecken, Germany
| | - Isabel Filbrich
- Institute of Organic Chemistry, Saarland University, P. O. Box 151150, 66041, Saarbruecken, Germany
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60
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Hirose D, Gazvoda M, Košmrlj J, Taniguchi T. Systematic Evaluation of 2-Arylazocarboxylates and 2-Arylazocarboxamides as Mitsunobu Reagents. J Org Chem 2018; 83:4712-4729. [PMID: 29570289 DOI: 10.1021/acs.joc.8b00486] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
2-Arylazocarboxylate and 2-arylazocarboxamide derivatives can serve as replacements of typical Mitsunobu reagents such as diethyl azodicarboxylate. A systematic investigation of the reactivity and physical properties of those azo compounds has revealed that they have an excellent ability as Mitsunobu reagents. These reagents show similar or superior reactivity as compared to the known azo reagents and are applicable to the broad scope of substrates. p Ka and steric effects of substrates have been investigated, and the limitation of the Mitsunobu reaction can be overcome by choosing suitable reagents from the library of 2-arylazocarboxylate and 2-aryl azocarboxamide derivatives. Convenient recovery of azo reagents is available by one-pot iron-catalyzed aerobic oxidation, for example. SC-DSC analysis of representative 2-arylazocarboxylate and 2-arylazocarboxamide derivatives has shown high thermal stability, indicating that these azo reagents possess lower chemical hazard compared with typical azo reagents.
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Affiliation(s)
| | - Martin Gazvoda
- Faculty of Chemistry and Chemical Technology , University of Ljubljana , Večna pot 113 , SI-1000 Ljubljana , Slovenia
| | - Janez Košmrlj
- Faculty of Chemistry and Chemical Technology , University of Ljubljana , Večna pot 113 , SI-1000 Ljubljana , Slovenia
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61
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Szigeti M, Dobi Z, Soós T. The Goldilocks Principle in Phase Labeling. Minimalist and Orthogonal Phase Tagging for Chromatography-Free Mitsunobu Reaction. J Org Chem 2018; 83:2869-2874. [PMID: 29378404 DOI: 10.1021/acs.joc.8b00014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An inexpensive and chromatography-free Mitsunobu methodology has been developed using low molecular weight and orthogonally phase-tagged reagents, a tert-butyl-tagged highly apolar phosphine, and a water-soluble DIAD analogue. The byproduct of the Mitsunobu reactions can be removed by sequential liquid-liquid extractions using traditional solvents such as hexanes, MeOH, water, and EtOAc. Owing to the orthogonal phase labeling, the spent reagents can be regenerated. This new variant of the Mitsunobu reaction promises to provide an alternative and complementary solution for the well-known separation problem of the Mitsunobu reaction without having to resort to expensive, large molecular weight reagents and chromatography.
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Affiliation(s)
- Mariann Szigeti
- Institute of Organic Chemistry, Research Centre of Natural Sciences, Hungarian Academy of Sciences Magyar tudósok körútja 2, H-1117, Budapest, Hungary
| | - Zoltán Dobi
- Institute of Organic Chemistry, Research Centre of Natural Sciences, Hungarian Academy of Sciences Magyar tudósok körútja 2, H-1117, Budapest, Hungary
| | - Tibor Soós
- Institute of Organic Chemistry, Research Centre of Natural Sciences, Hungarian Academy of Sciences Magyar tudósok körútja 2, H-1117, Budapest, Hungary
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62
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Downey J, Bongarzone S, Hader S, Gee AD. In-loop flow [ 11 C]CO 2 fixation and radiosynthesis of N,N'-[ 11 C]dibenzylurea. J Labelled Comp Radiopharm 2018; 61:263-271. [PMID: 28977686 PMCID: PMC5900881 DOI: 10.1002/jlcr.3568] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 08/22/2017] [Accepted: 09/24/2017] [Indexed: 11/11/2022]
Abstract
Cyclotron-produced carbon-11 is a highly valuable radionuclide for the production of positron emission tomography (PET) radiotracers. It is typically produced as relatively unreactive carbon-11 carbon dioxide ([11 C]CO2 ), which is most commonly converted into a more reactive precursor for synthesis of PET radiotracers. The development of [11 C]CO2 fixation methods has more recently enabled the direct radiolabelling of a diverse array of structures directly from [11 C]CO2 , and the advantages afforded by the use of a loop-based system used in 11 C-methylation and 11 C-carboxylation reactions inspired us to apply the [11 C]CO2 fixation "in-loop." In this work, we developed and investigated a new ethylene tetrafluoroethylene (ETFE) loop-based [11 C]CO2 fixation method, enabling the fast and efficient, direct-from-cyclotron, in-loop trapping of [11 C]CO2 using mixed DBU/amine solutions. An optimised protocol was integrated into a proof-of-concept in-loop flow radiosynthesis of N,N'-[11 C]dibenzylurea. This reaction exhibited an average 78% trapping efficiency and a crude radiochemical purity of 83% (determined by radio-HPLC), giving an overall nonisolated radiochemical yield of 72% (decay-corrected) within just 3 minutes from end of bombardment. This proof-of-concept reaction has demonstrated that efficient [11 C]CO2 fixation can be achieved in a low-volume (150 μL) ETFE loop and that this can be easily integrated into a rapid in-loop flow radiosynthesis of carbon-11-labelled products. This new in-loop methodology will allow fast radiolabelling reactions to be performed using cheap/disposable ETFE tubing setup (ideal for good manufacturing practice production) thereby contributing to the widespread usage of [11 C]CO2 trapping/fixation reactions for the production of PET radiotracers.
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Affiliation(s)
- Joseph Downey
- Division of Imaging Sciences and Biomedical EngineeringKing's College LondonLondonUK
| | - Salvatore Bongarzone
- Division of Imaging Sciences and Biomedical EngineeringKing's College LondonLondonUK
| | - Stefan Hader
- Division of Imaging Sciences and Biomedical EngineeringKing's College LondonLondonUK
| | - Antony D. Gee
- Division of Imaging Sciences and Biomedical EngineeringKing's College LondonLondonUK
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63
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Traboni S, Bedini E, Iadonisi A. Solvent-Free Conversion of Alcohols to Alkyl Iodides and One-Pot Elaborations Thereof. ChemistrySelect 2018. [DOI: 10.1002/slct.201800130] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Serena Traboni
- Department of Chemical Sciences; University of Naples Federico II; Via Cinthia 4, I - 80126 Naples Italy
| | - Emiliano Bedini
- Department of Chemical Sciences; University of Naples Federico II; Via Cinthia 4, I - 80126 Naples Italy
| | - Alfonso Iadonisi
- Department of Chemical Sciences; University of Naples Federico II; Via Cinthia 4, I - 80126 Naples Italy
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64
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Kaneda K, Naruse R, Yamamoto S, Satoh T. Reactivity of the Sultam and Strained Alkyne Groups in 2-Aminobenzenesulfonamide-Containing Cyclononyne (ABSACN). ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201700687] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Kyosuke Kaneda
- Division of Medicinal Chemistry; Hokkaido Pharmaceutical University; 7-15-4-1 Maeda Teine Sapporo Hokkaido 006-8590 Japan
| | - Risa Naruse
- Division of Medicinal Chemistry; Hokkaido Pharmaceutical University; 7-15-4-1 Maeda Teine Sapporo Hokkaido 006-8590 Japan
| | - Syota Yamamoto
- Division of Medicinal Chemistry; Hokkaido Pharmaceutical University; 7-15-4-1 Maeda Teine Sapporo Hokkaido 006-8590 Japan
| | - Teppei Satoh
- Division of Medicinal Chemistry; Hokkaido Pharmaceutical University; 7-15-4-1 Maeda Teine Sapporo Hokkaido 006-8590 Japan
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65
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Sahoo P, Gawali SS, Gunanathan C. Iron-Catalyzed Selective Etherification and Transetherification Reactions Using Alcohols. ACS OMEGA 2018; 3:124-136. [PMID: 31457881 PMCID: PMC6641510 DOI: 10.1021/acsomega.7b01705] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Accepted: 12/19/2017] [Indexed: 06/10/2023]
Abstract
Simple and readily available iron(III) triflate turned out to be a cheap, environmentally benign, and efficient catalyst for the direct etherification of alcohols. The use of ammonium chloride as an additive (5 mol %, 1 equiv relative to catalyst) suppressed the side reactions completely and ensured the selective ether formation even on challenging substrates containing electron-donating substituents. This method allows the selective synthesis of symmetrical ethers from benzylic secondary alcohols and unsymmetrical ethers directly from secondary and primary alcohols. Moreover, transetherification of symmetrical ethers using primary alcohols is attained. The reaction progress of symmetrical ether and unsymmetrical ether formation followed zero-order and first-order kinetics, respectively. Electron paramagnetic resonance (EPR) measurements of the reaction mixture and simple iron(III) triflate clearly indicated that oxidation state of the metal center remains same throughout the catalysis. Mechanistic studies confirmed that the unsymmetrical ether formation occurs via the in situ formed symmetrical ethers.
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66
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Kim MH, Kim J. Aerobic Oxidation of Alkyl 2-Phenylhydrazinecarboxylates Catalyzed by CuCl and DMAP. J Org Chem 2018; 83:1673-1679. [DOI: 10.1021/acs.joc.7b03119] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Min Hye Kim
- Department of Chemistry, and Research
Institute of Natural Sciences, Incheon National University, 119 Academy-ro, Yeonsu-gu, Incheon 22012, Republic of Korea
| | - Jinho Kim
- Department of Chemistry, and Research
Institute of Natural Sciences, Incheon National University, 119 Academy-ro, Yeonsu-gu, Incheon 22012, Republic of Korea
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67
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Baumruck AC, Tietze D, Steinacker LK, Tietze AA. Chemical synthesis of membrane proteins: a model study on the influenza virus B proton channel. Chem Sci 2018; 9:2365-2375. [PMID: 29719709 PMCID: PMC5897842 DOI: 10.1039/c8sc00004b] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2018] [Accepted: 01/21/2018] [Indexed: 12/16/2022] Open
Abstract
NCL results in the quantitative yield of a membrane protein, where a thioester peptide is formed from an oxo-ester with an in situ cleavable solubilizing tag.
In the present study we have developed and optimized a robust strategy for the synthesis of highly hydrophobic peptides, especially membrane proteins, exemplarily using the influenza B M2 proton channel (BM2(1–51)). This strategy is based on the native chemical ligation of two fragments, where the thioester fragment is formed from an oxo-ester peptide, which is synthesized using Fmoc-SPPS, and features an in situ cleavable solubilizing tag (ADO, ADO2 or ADO-Lys5). The nearly quantitative production of the ligation product was followed by an optimized work up protocol, resulting in almost quantitative desulfurization and Acm-group cleavage. Circular dichroism analysis in a POPC lipid membrane revealed that the synthetic BM2(1–51) construct adopts a helical structure similar to that of the previously characterized BM2(1–33).
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Affiliation(s)
- A C Baumruck
- Darmstadt University of Technology , Clemens-Schöpf Institute of Organic Chemistry and Biochemistry , Alarich-Weiss Str. 4 , 64287 Darmstadt , Germany .
| | - D Tietze
- Darmstadt University of Technology , Eduard-Zintl-Institute of Inorganic and Physical Chemistry , Alarich-Weiss-Str. 4 , 64287 Darmstadt , Germany
| | - L K Steinacker
- Darmstadt University of Technology , Clemens-Schöpf Institute of Organic Chemistry and Biochemistry , Alarich-Weiss Str. 4 , 64287 Darmstadt , Germany .
| | - A A Tietze
- Darmstadt University of Technology , Clemens-Schöpf Institute of Organic Chemistry and Biochemistry , Alarich-Weiss Str. 4 , 64287 Darmstadt , Germany .
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68
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Akondi SM, Gangireddy P, Pickel TC, Liebeskind LS. Aerobic, Diselenide-Catalyzed Redox Dehydration: Amides and Peptides. Org Lett 2018; 20:538-541. [PMID: 29323920 DOI: 10.1021/acs.orglett.7b03620] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
At 2.5 mol % loadings using reaction temperatures between 30-55 °C, ortho-functionalized diaryl diselenides are highly effective organocatalytic oxidants for aerobic redox dehydrative amidic and peptidic bond formation using triethyl phosphite as a simple terminal reductant. This simple-to-perform organocatalytic reaction relies on the ability of selenols to react directly with dioxygen in air without recourse to metal catalysts. It represents an important step toward the development of a general, economical, and benign catalytic redox dehydration protocol.
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Affiliation(s)
- Srirama Murthy Akondi
- Department of Chemistry, Emory University , 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Pavankumar Gangireddy
- Department of Chemistry, Emory University , 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Thomas C Pickel
- Department of Chemistry, Emory University , 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Lanny S Liebeskind
- Department of Chemistry, Emory University , 1515 Dickey Drive, Atlanta, Georgia 30322, United States
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69
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Gill DM, Iveson M, Collins I, Jones AM. A Mitsunobu reaction to functionalized cyclic and bicyclic N-arylamines. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2017.12.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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70
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An R, Liao L, Liu X, Song S, Zhao X. Acid-catalyzed oxidative cleavage of S–S and Se–Se bonds with DEAD: efficient access to sulfides and selenides. Org Chem Front 2018. [DOI: 10.1039/c8qo00909k] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
An acid/DEAD system for oxidative cleavage of S–S and Se–Se bonds to generate chalcogenium ions has been developed. These ions could be captured by nucleophile-tethered alkenes and nucleophilic aryl reagents such as arylboronic acids and arenes to give chalcogenides.
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Affiliation(s)
- Rui An
- Institute of Organic Chemistry & MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- P. R. China
| | - Lihao Liao
- Institute of Organic Chemistry & MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- P. R. China
| | - Xiang Liu
- Institute of Organic Chemistry & MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- P. R. China
| | - Shuqin Song
- School of Materials Science and Engineering
- Sun Yat-Sen University
- Guangzhou 510275
- P. R. China
| | - Xiaodan Zhao
- Institute of Organic Chemistry & MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- P. R. China
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71
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Ruthenbeck A, Elgaher WAM, Haupenthal J, Hartmann RW, Meier C. Bacterial RNAP Inhibitors: Synthesis and Evaluation of Prodrugs of Aryl-ureidothiophene-carboxylic acids. ChemistrySelect 2017. [DOI: 10.1002/slct.201702574] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Alexandra Ruthenbeck
- Organic Chemistry; Department of Chemistry, Faculty of Sciences; Hamburg University; Martin-Luther-King-Platz 6 20146 Hamburg Germany
| | - Walid A. M. Elgaher
- Department of Drug Design and Optimization; Helmholtz Institute for Pharmaceutical Research Saarland (HIPS); Campus E8.1 66123 Saarbrücken Germany
| | - Jörg Haupenthal
- Department of Drug Design and Optimization; Helmholtz Institute for Pharmaceutical Research Saarland (HIPS); Campus E8.1 66123 Saarbrücken Germany
| | - Rolf W. Hartmann
- Department of Drug Design and Optimization; Helmholtz Institute for Pharmaceutical Research Saarland (HIPS); Campus E8.1 66123 Saarbrücken Germany
| | - Chris Meier
- Organic Chemistry; Department of Chemistry, Faculty of Sciences; Hamburg University; Martin-Luther-King-Platz 6 20146 Hamburg Germany
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72
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Doumandji L, Matondo H, Estaran S, Hamada B, Lagneau C, Devillers J, Yébakima A, Doucet-Panaye A, Doucet JP, Lattes A. Synthesis of retinoid analogues of juvenile hormones. Appl Organomet Chem 2017. [DOI: 10.1002/aoc.3736] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Lotfi Doumandji
- Laboratoire des Interactions Moléculaires et Réactivité Chimique et Photochimique, UMR 5623; Université Paul Sabatier; 118 route de Narbonne 31062 Toulouse Cedex France
- UER de Chimie appliquée, Ecole Militaire Polytechnique; BP 17, Bordj-El-Bahri; 16046 Alger Algeria
| | - Hubert Matondo
- Laboratoire des Interactions Moléculaires et Réactivité Chimique et Photochimique, UMR 5623; Université Paul Sabatier; 118 route de Narbonne 31062 Toulouse Cedex France
| | - Sébastien Estaran
- EID Méditerranée; 165 avenue Paul-Rimbaud 34184 Montpellier Cedex 4 France
| | | | - Christophe Lagneau
- EID Méditerranée; 165 avenue Paul-Rimbaud 34184 Montpellier Cedex 4 France
| | - James Devillers
- CTIS; 3 Chemin de la Gravière; 69140 Rillieux La Pape France
| | - André Yébakima
- BP 679; Centre de Démoustication/LAV (ARS-Collectivité Territoriale) de la Martinique; 97200 Fort de France Martinique
| | - Annick Doucet-Panaye
- Université Paris 7, Paris Diderot; ITODYS, UMR 7086; 15 rue Jean de Baïf 75013 Paris France
| | - Jean-Pierre Doucet
- Université Paris 7, Paris Diderot; ITODYS, UMR 7086; 15 rue Jean de Baïf 75013 Paris France
| | - Armand Lattes
- Laboratoire des Interactions Moléculaires et Réactivité Chimique et Photochimique, UMR 5623; Université Paul Sabatier; 118 route de Narbonne 31062 Toulouse Cedex France
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73
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Tonoi T, Yoshinaga Y, Fujishiro M, Mameda K, Kato T, Shibamoto K, Shiina I. Asymmetric Total Synthesis of (-)-Astakolactin and Confirmation of Its Stereostructure. JOURNAL OF NATURAL PRODUCTS 2017; 80:2335-2344. [PMID: 28767241 DOI: 10.1021/acs.jnatprod.7b00368] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The originally proposed structure of astakolactin was revised, and an asymmetric total synthesis of the newly proposed structure was achieved. The key transformations in the synthesis were a Johnson-Claisen rearrangement, an asymmetric Mukaiyama aldol reaction, and a Mitsunobu-type cyclodehydration. The spectroscopic data and specific rotation of the compound obtained matched well with those reported for naturally occurring astakolactin.
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Affiliation(s)
- Takayuki Tonoi
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science , 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Yutaka Yoshinaga
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science , 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Moe Fujishiro
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science , 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Keisuke Mameda
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science , 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Takashi Kato
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science , 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Kentaro Shibamoto
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science , 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Isamu Shiina
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science , 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
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74
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White DR, Herman MI, Wolfe JP. Palladium-Catalyzed Alkene Carboalkoxylation Reactions of Phenols and Alcohols for the Synthesis of Carbocycles. Org Lett 2017; 19:4311-4314. [PMID: 28787170 DOI: 10.1021/acs.orglett.7b01975] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Intermolecular alkene difunctionalization reactions between terminal alkenes bearing a pendant aryl or alkenyl triflate electrophile and exogenous alcohol or phenol nucleophiles are described. These transformations afford substituted indanyl or alkylidenecyclopentyl ethers in high yield with excellent diastereoselectivity. The transformations proceed through intermolecular capture of an intermediate [Pd(II)-alkene]+[OTf]- complex by the alcohol or phenol nucleophile.
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Affiliation(s)
- Derick R White
- Department of Chemistry, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109-1055, United States
| | - Madeline I Herman
- Department of Chemistry, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109-1055, United States
| | - John P Wolfe
- Department of Chemistry, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109-1055, United States
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75
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Xie J, Xu C, Dai Q, Wang X, Xu G, Chen Y, Dai L. Synthesis and application of a novel asymmetric azo reagent: 1-( tert -butyl)-2-(4-chlorobenzyl) azodicarboxylate (tBCAD). Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.07.033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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76
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Affiliation(s)
- Hai Huang
- Department of Chemistry and
Biochemistry, University of Nevada Las Vegas, 4505 S. Maryland Parkway, Las Vegas, Nevada 89154-4003, United States
| | - Jun Yong Kang
- Department of Chemistry and
Biochemistry, University of Nevada Las Vegas, 4505 S. Maryland Parkway, Las Vegas, Nevada 89154-4003, United States
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77
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Gangireddy P, Patro V, Lam L, Morimoto M, Liebeskind LS. Mechanism of Acylative Oxidation–Reduction–Condensation Reactions Using Benzoisothiazolones as Oxidant and Triethylphosphite as Stoichiometric Reductant. J Org Chem 2017; 82:3513-3529. [DOI: 10.1021/acs.joc.7b00020] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Pavankumar Gangireddy
- Emory University, Department of Chemistry, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Vidyavathi Patro
- Emory University, Department of Chemistry, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Leighann Lam
- Emory University, Department of Chemistry, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Mariko Morimoto
- Emory University, Department of Chemistry, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Lanny S. Liebeskind
- Emory University, Department of Chemistry, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
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78
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Villadsen K, Martos-Maldonado MC, Jensen KJ, Thygesen MB. Chemoselective Reactions for the Synthesis of Glycoconjugates from Unprotected Carbohydrates. Chembiochem 2017; 18:574-612. [DOI: 10.1002/cbic.201600582] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Indexed: 12/27/2022]
Affiliation(s)
- Klaus Villadsen
- Department of Chemistry; University of Copenhagen; Faculty of Science; Thorvaldsensvej 40 1871 Frederiksberg C Denmark
| | - Manuel C. Martos-Maldonado
- Department of Chemistry; University of Copenhagen; Faculty of Science; Thorvaldsensvej 40 1871 Frederiksberg C Denmark
| | - Knud J. Jensen
- Department of Chemistry; University of Copenhagen; Faculty of Science; Thorvaldsensvej 40 1871 Frederiksberg C Denmark
| | - Mikkel B. Thygesen
- Department of Chemistry; University of Copenhagen; Faculty of Science; Thorvaldsensvej 40 1871 Frederiksberg C Denmark
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79
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Hoang A, Popov K, Somfai P. An Efficient Synthesis of (±)-Dehaloperophoramidine. J Org Chem 2017; 82:2171-2176. [PMID: 28145119 DOI: 10.1021/acs.joc.6b02969] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Anita Hoang
- Centre for Analysis and Synthesis,
Department of Chemistry, Lund University, 22100 Lund, Sweden
| | - Kirill Popov
- Centre for Analysis and Synthesis,
Department of Chemistry, Lund University, 22100 Lund, Sweden
| | - Peter Somfai
- Centre for Analysis and Synthesis,
Department of Chemistry, Lund University, 22100 Lund, Sweden
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80
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Huang H, Kang JY. Oxidation-Reduction Condensation of Diazaphosphites for Carbon-Heteroatom Bond Formation Based on Mitsunobu Mechanism. Org Lett 2017; 19:544-547. [PMID: 28107019 DOI: 10.1021/acs.orglett.6b03709] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
An efficient oxidation-reduction condensation reaction of diazaphosphites with various nonacidic pronucleophiles in the presence of DIAD as a weak oxidant has been developed for carbon-heteroatom bond formation. This mild process affords structurally diverse tertiary amines, secondary amines, esters, ethers, and thioethers in moderate to excellent yields. The selective synthesis of secondary amines from primary amines has been achieved. Importantly, a practical application to the synthesis of antiparkinsonian agent piribedil has been demonstrated.
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Affiliation(s)
- Hai Huang
- Department of Chemistry and Biochemistry, University of Nevada Las Vegas , 4505 South Maryland Parkway, Las Vegas, Nevada 89154-4003, United States.,Department of Applied Chemistry, College of Chemistry and Molecular Engineering, Nanjing Tech University , No. 30 Puzhu Road (S), Nanjing 211816, People's Republic of China
| | - Jun Yong Kang
- Department of Chemistry and Biochemistry, University of Nevada Las Vegas , 4505 South Maryland Parkway, Las Vegas, Nevada 89154-4003, United States
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81
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März M, Chudoba J, Kohout M, Cibulka R. Photocatalytic esterification under Mitsunobu reaction conditions mediated by flavin and visible light. Org Biomol Chem 2017; 15:1970-1975. [DOI: 10.1039/c6ob02770a] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Excited flavin facilitates stereoselective coupling of alcohols and acids to esters in the presence of triphenylphosphine and catalytic amount of dialkyl hydrazinedicarboxylate.
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Affiliation(s)
- M. März
- Department of Organic Chemistry
- University of Chemistry and Technology
- Prague
- 166 28 Prague
- Czech Republic
| | - J. Chudoba
- Central Laboratories
- University of Chemistry and Technology
- Prague
- 166 28 Prague
- Czech Republic
| | - M. Kohout
- Department of Organic Chemistry
- University of Chemistry and Technology
- Prague
- 166 28 Prague
- Czech Republic
| | - R. Cibulka
- Department of Organic Chemistry
- University of Chemistry and Technology
- Prague
- 166 28 Prague
- Czech Republic
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82
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Trost BM, Knopf JD, Brindle CS. Synthetic Strategies Employed for the Construction of Fostriecin and Related Natural Products. Chem Rev 2016; 116:15035-15088. [PMID: 28027648 PMCID: PMC5720176 DOI: 10.1021/acs.chemrev.6b00488] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Fostriecin and related natural products present a significant challenge for synthetic chemists due to their structural complexity and chemical sensitivity. This review will chronicle the successful efforts of synthetic chemists in the construction of these biologically active molecules. Key carbon-carbon bond forming reactions will be highlighted, as well as the methods used to install the numerous stereocenters present in this class of compounds.
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Affiliation(s)
- Barry M. Trost
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, United States
| | - Joshua D. Knopf
- Department of Chemistry, Trinity College, 300 Summit Street, Hartford, Connecticut 06106, United States
| | - Cheyenne S. Brindle
- Department of Chemistry, Trinity College, 300 Summit Street, Hartford, Connecticut 06106, United States
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83
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Rapid synthesis of cyclic oligomeric depsipeptides with positional, stereochemical, and macrocycle size distribution control. Proc Natl Acad Sci U S A 2016; 113:14893-14897. [PMID: 27974608 DOI: 10.1073/pnas.1616462114] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Macrocyclic small molecules are attractive tools in the development of sensors, new materials, and therapeutics. Within early-stage drug discovery, they are increasingly sought for their potential to interact with broad surfaces of peptidic receptors rather than within their narrow folds and pockets. Cyclization of linear small molecule precursors is a straightforward strategy to constrain conformationally mobile motifs, but forging a macrocycle bond typically becomes more difficult at larger ring sizes. We report the development of a general approach to discrete collections of oligomeric macrocyclic depsipeptides using an oligomerization/macrocyclization process governed by a series of Mitsunobu reactions of hydroxy acid monomers. Ring sizes of 18, 24, 30, and 36 are formed in a single reaction from a didepsipeptide, whereas sizes of 24, 36, and 60 result from a tetradepsipeptide. The ring-size selectivity inherent to the approach can be modulated by salt additives that enhance the formation of specific ring sizes. Use of chemical synthesis to prepare the monomers suggests broad access to functionally and stereochemically diverse collections of natural product-like oligodepsipeptide macrocycles. Two cyclodepsipeptide natural products were prepared along with numerous unnatural oligomeric congeners to provide rapid access to discrete collections of complex macrocyclic small molecules from medium (18) to large (60) ring sizes.
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84
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Jung D, Kim MH, Kim J. Cu-Catalyzed Aerobic Oxidation of Di-tert-butyl Hydrazodicarboxylate to Di-tert-butyl Azodicarboxylate and Its Application on Dehydrogenation of 1,2,3,4-Tetrahydroquinolines under Mild Conditions. Org Lett 2016; 18:6300-6303. [DOI: 10.1021/acs.orglett.6b03166] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dahyeon Jung
- Department of Chemistry, Incheon National University, 119 Academy-ro, Yeonsu-gu, Incheon 22012, Republic of Korea
| | - Min Hye Kim
- Department of Chemistry, Incheon National University, 119 Academy-ro, Yeonsu-gu, Incheon 22012, Republic of Korea
| | - Jinho Kim
- Department of Chemistry, Incheon National University, 119 Academy-ro, Yeonsu-gu, Incheon 22012, Republic of Korea
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85
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Ochiai H, Niwa T, Hosoya T. Stereoinversion of Stereocongested Carbocyclic Alcohols via Triflylation and Subsequent Treatment with Aqueous N,N-Dimethylformamide. Org Lett 2016; 18:5982-5985. [DOI: 10.1021/acs.orglett.6b02675] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hidenori Ochiai
- Chemical Biology Team, Division
of Bio-Function Dynamics Imaging, RIKEN Center for Life Science Technologies, 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe 650-0047, Japan
| | - Takashi Niwa
- Chemical Biology Team, Division
of Bio-Function Dynamics Imaging, RIKEN Center for Life Science Technologies, 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe 650-0047, Japan
| | - Takamitsu Hosoya
- Chemical Biology Team, Division
of Bio-Function Dynamics Imaging, RIKEN Center for Life Science Technologies, 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe 650-0047, Japan
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86
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Hirose D, Gazvoda M, Košmrlj J, Taniguchi T. The “Fully Catalytic System” in Mitsunobu Reaction Has Not Been Realized Yet. Org Lett 2016; 18:4036-9. [DOI: 10.1021/acs.orglett.6b01894] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Daisuke Hirose
- Graduate
School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Martin Gazvoda
- Faculty
of Chemistry and Chemical Technology, University of Ljubljana, Večna
pot 113, SI-1000, Ljubljana, Slovenia
| | - Janez Košmrlj
- Faculty
of Chemistry and Chemical Technology, University of Ljubljana, Večna
pot 113, SI-1000, Ljubljana, Slovenia
| | - Tsuyoshi Taniguchi
- School
of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and
Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
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87
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Lee CJ, Chang TH, Yu JK, Madhusudhan Reddy G, Hsiao MY, Lin W. Synthesis of Functionalized Furans via Chemoselective Reduction/Wittig Reaction Using Catalytic Triethylamine and Phosphine. Org Lett 2016; 18:3758-61. [DOI: 10.1021/acs.orglett.6b01781] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Chia-Jui Lee
- Department
of Chemistry, National Taiwan Normal University, 88, Sec. 4, Tingchow Road, Taipei 11677, Taiwan ROC
| | - Tzu-Hsiu Chang
- Department
of Chemistry, National Taiwan Normal University, 88, Sec. 4, Tingchow Road, Taipei 11677, Taiwan ROC
| | - Jhen-Kuei Yu
- Department
of Chemistry, National Taiwan Normal University, 88, Sec. 4, Tingchow Road, Taipei 11677, Taiwan ROC
| | - Ganapuram Madhusudhan Reddy
- Department
of Chemistry, National Taiwan Normal University, 88, Sec. 4, Tingchow Road, Taipei 11677, Taiwan ROC
| | - Ming-Yu Hsiao
- Department
of Chemistry, National Taiwan Normal University, 88, Sec. 4, Tingchow Road, Taipei 11677, Taiwan ROC
| | - Wenwei Lin
- Department
of Chemistry, National Taiwan Normal University, 88, Sec. 4, Tingchow Road, Taipei 11677, Taiwan ROC
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88
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Huy PH, Motsch S, Kappler SM. Formamides as Lewis Base Catalysts in SNReactions-Efficient Transformation of Alcohols into Chlorides, Amines, and Ethers. Angew Chem Int Ed Engl 2016; 55:10145-9. [DOI: 10.1002/anie.201604921] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Peter H. Huy
- Universität des Saarlandes; Institut für Organische Chemie; Postfach 151150 66041 Saarbrücken Germany
| | - Sebastian Motsch
- Universität des Saarlandes; Institut für Organische Chemie; Postfach 151150 66041 Saarbrücken Germany
- Universität zu Stuttgart; Institut für Organische Chemie; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Sarah M. Kappler
- Universität des Saarlandes; Institut für Organische Chemie; Postfach 151150 66041 Saarbrücken Germany
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89
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Huy PH, Motsch S, Kappler SM. Formamide als Lewis-Basen-Katalysatoren in SN-Reaktionen: Effiziente Transformationen von Alkoholen zu Chloriden, Aminen und Ethern. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201604921] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Peter H. Huy
- Universität des Saarlandes; Institut für Organische Chemie; Postfach 151150 66041 Saarbrücken Deutschland
| | - Sebastian Motsch
- Universität des Saarlandes; Institut für Organische Chemie; Postfach 151150 66041 Saarbrücken Deutschland
- Universität zu Stuttgart; Institut für Organische Chemie; Pfaffenwaldring 55 70569 Stuttgart Deutschland
| | - Sarah M. Kappler
- Universität des Saarlandes; Institut für Organische Chemie; Postfach 151150 66041 Saarbrücken Deutschland
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90
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Szlenkier M, Kamel K, Boryski J. Regioselective Mitsunobu Reaction of Partially Protected Uridine. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2016; 35:410-25. [PMID: 27351239 DOI: 10.1080/15257770.2016.1188943] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Mitsunobu reaction of partially acylated uridine proceeds with high regioselectivity for intramolecular SN2 anhydro linkage closuring. Under the reaction conditions, an isomeric mixture of diacyl uridine derivatives with either free 2'- or 3'-hydroxyl group was transformed into a single cyclonucleosidic product, 2,2'-anhydro-3',5'-di-O-acyluridine. This paper presents a possible mechanism of the reactions, the explanation of observed phenomenon based on semiempirical and density functional theory (DFT) calculations and possible utility of this synthetic pathway.
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Affiliation(s)
- Maurycy Szlenkier
- a Institute of Bioorganic Chemistry, Polish Academy of Sciences , Poznan , Poland
| | - Karol Kamel
- a Institute of Bioorganic Chemistry, Polish Academy of Sciences , Poznan , Poland
| | - Jerzy Boryski
- a Institute of Bioorganic Chemistry, Polish Academy of Sciences , Poznan , Poland
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91
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Li J, Xue M, Bai Y, Peng J, Xiao W. Effect of silylated triarylphosphine ligands on rhodium-catalyzed hydrosilylation. Appl Organomet Chem 2016. [DOI: 10.1002/aoc.3519] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Jiayun Li
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 310012 China
| | - Mei Xue
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 310012 China
| | - Ying Bai
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 310012 China
| | - Jiajian Peng
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 310012 China
| | - Wenjun Xiao
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; Hangzhou 310012 China
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92
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Liebeskind LS, Gangireddy P, Lindale MG. Benzoisothiazolone Organo/Copper-Cocatalyzed Redox Dehydrative Construction of Amides and Peptides from Carboxylic Acids using (EtO)3P as the Reductant and O2 in Air as the Terminal Oxidant. J Am Chem Soc 2016; 138:6715-8. [PMID: 27175892 DOI: 10.1021/jacs.6b03168] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Carboxylic acids and amine/amino acid reactants can be converted to amides and peptides at neutral pH within 5-36 h at 50 °C using catalytic quantities of a redox-active benzoisothiazolone and a copper complex. These catalytic "oxidation-reduction condensation" reactions are carried out open to dry air using O2 as the terminal oxidant and a slight excess of triethyl phosphite as the reductant. Triethyl phosphate is the easily removed byproduct. These simple-to-run catalytic reactions provide practical and economical procedures for the acylative construction of C-N bonds.
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Affiliation(s)
- Lanny S Liebeskind
- Department of Chemistry, Emory University , 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Pavankumar Gangireddy
- Department of Chemistry, Emory University , 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Matthew G Lindale
- Department of Chemistry, Emory University , 1515 Dickey Drive, Atlanta, Georgia 30322, United States
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93
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Phakhodee W, Duangkamol C, Pattarawarapan M. Ph3P-I2 mediated aryl esterification with a mechanistic insight. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.03.105] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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94
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Hirose D, Gazvoda M, Košmrlj J, Taniguchi T. Advances and mechanistic insight on the catalytic Mitsunobu reaction using recyclable azo reagents. Chem Sci 2016; 7:5148-5159. [PMID: 30155165 PMCID: PMC6020523 DOI: 10.1039/c6sc00308g] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Accepted: 04/12/2016] [Indexed: 02/03/2023] Open
Abstract
Ethyl 2-arylhydrazinecarboxylates can work as organocatalysts for Mitsunobu reactions because they provide ethyl 2-arylazocarboxylates through aerobic oxidation with a catalytic amount of iron phthalocyanine. First, ethyl 2-(3,4-dichlorophenyl)hydrazinecarboxylate has been identified as a potent catalyst, and the reactivity of the catalytic Mitsunobu reaction was improved through strict optimization of the reaction conditions. Investigation of the catalytic properties of ethyl 2-arylhydrazinecarboxylates and the corresponding azo forms led us to the discovery of a new catalyst, ethyl 2-(4-cyanophenyl)hydrazinecarboxylates, which expanded the scope of substrates. The mechanistic study of the Mitsunobu reaction with these new reagents strongly suggested the formation of betaine intermediates as in typical Mitsunobu reactions. The use of atmospheric oxygen as a sacrificial oxidative agent along with the iron catalyst is convenient and safe from the viewpoint of green chemistry. In addition, thermal analysis of the developed Mitsunobu reagents supports sufficient thermal stability compared with typical azo reagents such as diethyl azodicarboxylate (DEAD). The catalytic system realizes a substantial improvement of the Mitsunobu reaction and will be applicable to practical synthesis.
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Affiliation(s)
- Daisuke Hirose
- Graduate School of Natural Science and Technology , Kanazawa University , Kakuma-machi , Kanazawa 920-1192 , Japan
| | - Martin Gazvoda
- Faculty of Chemistry and Chemical Technology , University of Ljubljana , Večna pot 113, SI-1000 , Ljubljana , Slovenia .
| | - Janez Košmrlj
- Faculty of Chemistry and Chemical Technology , University of Ljubljana , Večna pot 113, SI-1000 , Ljubljana , Slovenia .
| | - Tsuyoshi Taniguchi
- School of Pharmaceutical Sciences , Institute of Medical , Pharmaceutical and Health Sciences , Kanazawa University , Kakuma-machi , Kanazawa 920-1192 , Japan .
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95
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Catalytic asymmetric transfer hydrogenation/dynamic kinetic resolution: an efficient synthesis of florfenicol. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.02.045] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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96
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Yu TY, Wei H, Luo YC, Wang Y, Wang ZY, Xu PF. PPh3O as an Activating Reagent for One-Pot Stereoselective Syntheses of Di- and Polybrominated Esters from Simple Aldehydes. J Org Chem 2016; 81:2730-6. [DOI: 10.1021/acs.joc.5b02618] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tian-Yang Yu
- Key
Laboratory of Synthetic and Natural Functional Molecule Chemistry
of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi’an 710127, P. R. China
| | - Hao Wei
- Key
Laboratory of Synthetic and Natural Functional Molecule Chemistry
of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi’an 710127, P. R. China
| | - Yong-Chun Luo
- State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Yao Wang
- State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Zhu-Yin Wang
- College
of Mechanics and Materials, Hohai University, Nanjing 210098, P. R. China
| | - Peng-Fei Xu
- State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
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97
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Ghavre M, Froese J, Pour M, Hudlicky T. Synthesis of Amaryllidaceae Constituents and Unnatural Derivatives. Angew Chem Int Ed Engl 2016; 55:5642-91. [DOI: 10.1002/anie.201508227] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Indexed: 12/24/2022]
Affiliation(s)
- Mukund Ghavre
- Chemistry Department and Centre for Biotechnology Brock University 1812 Sir Isaac Brock way St. Catharines ON L2S 3A1 Canada
| | - Jordan Froese
- Chemistry Department and Centre for Biotechnology Brock University 1812 Sir Isaac Brock way St. Catharines ON L2S 3A1 Canada
| | - Milan Pour
- Department of Inorganic and Organic Chemistry, Faculty of Pharmacy Charles University Heyrovského 1203 CZ-500 03 Hradec Králové Czech Republic
| | - Tomas Hudlicky
- Chemistry Department and Centre for Biotechnology Brock University 1812 Sir Isaac Brock way St. Catharines ON L2S 3A1 Canada
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98
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Ghavre M, Froese J, Pour M, Hudlicky T. Synthese von Inhaltsstoffen der Amaryllisgewächse und nichtnatürlichen Derivaten. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201508227] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Mukund Ghavre
- Chemistry Department and Centre for Biotechnology Brock University 1812 Sir Isaac Brock way St. Catharines ON L2S 3A1 Kanada
| | - Jordan Froese
- Chemistry Department and Centre for Biotechnology Brock University 1812 Sir Isaac Brock way St. Catharines ON L2S 3A1 Kanada
| | - Milan Pour
- Department of Inorganic and Organic Chemistry, Faculty of Pharmacy Charles University Heyrovského 1203 CZ-500 03 Hradec Králové Tschechische Republik
| | - Tomas Hudlicky
- Chemistry Department and Centre for Biotechnology Brock University 1812 Sir Isaac Brock way St. Catharines ON L2S 3A1 Kanada
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99
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Lian Y, Coffey SB, Li Q, Londregan AT. Preparation of Heteroaryl Ethers from Azine N-Oxides and Alcohols. Org Lett 2016; 18:1362-5. [DOI: 10.1021/acs.orglett.6b00295] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yajing Lian
- Pfizer Worldwide Medicinal Chemistry, Eastern Point
Road, Groton, Connecticut 06340, United States
| | - Steven B. Coffey
- Pfizer Worldwide Medicinal Chemistry, Eastern Point
Road, Groton, Connecticut 06340, United States
| | - Qifang Li
- Pfizer Worldwide Medicinal Chemistry, Eastern Point
Road, Groton, Connecticut 06340, United States
| | - Allyn T. Londregan
- Pfizer Worldwide Medicinal Chemistry, Eastern Point
Road, Groton, Connecticut 06340, United States
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100
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Cardoso FSP, Mickle GE, da Silva MA, Baraldi PT, Ferreira FB. Application of In Situ FTIR for the Preparation of 17-α-Estradiol via Mitsunobu Reaction. Org Process Res Dev 2016. [DOI: 10.1021/acs.oprd.5b00394] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Flávio S. P. Cardoso
- Libbs Farmacêutica Ltda., Rua Alberto Correia Francfort, 88, Embu das
Artes, São Paulo 06807461, Brazil
| | - Gregory E. Mickle
- Libbs Farmacêutica Ltda., Rua Alberto Correia Francfort, 88, Embu das
Artes, São Paulo 06807461, Brazil
| | - Marco A. da Silva
- Libbs Farmacêutica Ltda., Rua Alberto Correia Francfort, 88, Embu das
Artes, São Paulo 06807461, Brazil
| | - Patricia T. Baraldi
- Libbs Farmacêutica Ltda., Rua Alberto Correia Francfort, 88, Embu das
Artes, São Paulo 06807461, Brazil
| | - Fabio B. Ferreira
- Mettler Toledo Ind. e Com. Ltda, Av. Tamboré, 418, Barueri, São Paulo 06460000, Brazil
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