51
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Affiliation(s)
- Aoife Malone
- Trinity
Biomedical Sciences
Institute, Trinity College, 152-160 Pearse Street, Dublin 2, Ireland
| | - Eoin M. Scanlan
- Trinity
Biomedical Sciences
Institute, Trinity College, 152-160 Pearse Street, Dublin 2, Ireland
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52
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Markey L, Giordani S, Scanlan EM. Native Chemical Ligation,Thiol–Ene Click: A Methodology for the Synthesis of Functionalized Peptides. J Org Chem 2013; 78:4270-7. [DOI: 10.1021/jo4001542] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Lyn Markey
- Trinity Biomedical
Sciences Institute, Trinity College, 152-160
Pearse Street, Dublin 2, Ireland
| | - Silvia Giordani
- Trinity Biomedical
Sciences Institute, Trinity College, 152-160
Pearse Street, Dublin 2, Ireland
| | - Eoin M. Scanlan
- Trinity Biomedical
Sciences Institute, Trinity College, 152-160
Pearse Street, Dublin 2, Ireland
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53
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Affiliation(s)
- Aoife Malone
- School of Chemistry, Trinity College Dublin, Trinity Biomedical Sciences Insitute, 152-160 Pearse Street, Dublin 2, Ireland
| | - Eoin M. Scanlan
- School of Chemistry, Trinity College Dublin, Trinity Biomedical Sciences Insitute, 152-160 Pearse Street, Dublin 2, Ireland
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54
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Affiliation(s)
- Robin Daly
- Trinity Biomedical
Sciences Institute, Trinity College, 152-160
Pearse Street, Dublin 2, Ireland
| | - Thomas McCabe
- Trinity Biomedical
Sciences Institute, Trinity College, 152-160
Pearse Street, Dublin 2, Ireland
| | - Eoin M. Scanlan
- Trinity Biomedical
Sciences Institute, Trinity College, 152-160
Pearse Street, Dublin 2, Ireland
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55
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Daly R, Scanlan EM. An unusual glycosylation product from a partially protected fucosyl donor under silver triflate activation conditions. Org Biomol Chem 2013; 11:8452-7. [DOI: 10.1039/c3ob42073f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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56
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Daly R, Vaz G, Davies AM, Senge MO, Scanlan EM. Synthesis and Biological Evaluation of a Library of Glycoporphyrin Compounds. Chemistry 2012; 18:14671-9. [DOI: 10.1002/chem.201202064] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2012] [Indexed: 01/21/2023]
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57
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Giuntini F, Dumoulin F, Daly R, Ahsen V, Scanlan EM, Lavado ASP, Aylott JW, Rosser GA, Beeby A, Boyle RW. Orthogonally bifunctionalised polyacrylamide nanoparticles: a support for the assembly of multifunctional nanodevices. Nanoscale 2012; 4:2034-2045. [PMID: 22354385 DOI: 10.1039/c2nr11947a] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Polyacrylamide nanoparticles bearing two orthogonal reactive functionalities were prepared by reverse microemulsion polymerisation. Water-soluble photosensitisers and peptide or carbohydrate moieties were sequentially attached to the new nanospecies by orthogonal conjugations based on copper-catalysed azide-alkyne cycloaddition and isothiocyanate chemistry.
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Affiliation(s)
- F Giuntini
- Department of Chemistry, University of Hull, Kingston-upon-Hull, East Yorkshire, HU6 7RX, UK
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58
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Sagar R, Rudić S, Gamblin DP, Scanlan EM, Vaden TD, Odell B, Claridge TDW, Simons JP, Davis BG. Conformational effects in sugar ions: spectroscopic investigations in the gas phase and in solution. Chem Sci 2012. [DOI: 10.1039/c2sc20341c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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59
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Murphy DM, Cullen RJ, Jayasundara DR, Scanlan EM, Colavita PE. Study of the spontaneous attachment of polycyclic aryldiazonium salts onto amorphous carbon substrates. RSC Adv 2012. [DOI: 10.1039/c2ra20292a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
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60
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Scanlan EM, Mackeen MM, Wormald MR, Davis BG. Synthesis and Solution-Phase Conformation of the RG-I Fragment of the Plant Polysaccharide Pectin Reveals a Modification-Modulated Assembly Mechanism. J Am Chem Soc 2010; 132:7238-9. [DOI: 10.1021/ja9090963] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Eoin M. Scanlan
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K., and Glycobiology Institute, Department of Biochemistry, Oxford University, South Parks Road, Oxford OX1 3QU, U.K
| | - Mukram M. Mackeen
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K., and Glycobiology Institute, Department of Biochemistry, Oxford University, South Parks Road, Oxford OX1 3QU, U.K
| | - Mark R. Wormald
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K., and Glycobiology Institute, Department of Biochemistry, Oxford University, South Parks Road, Oxford OX1 3QU, U.K
| | - Benjamin G. Davis
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K., and Glycobiology Institute, Department of Biochemistry, Oxford University, South Parks Road, Oxford OX1 3QU, U.K
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61
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Locos OB, Heindl CC, Corral A, Senge MO, Scanlan EM. Efficient Synthesis of Glycoporphyrins by Microwave-Mediated “Click” Reactions. European J Org Chem 2010. [DOI: 10.1002/ejoc.200901292] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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62
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Affiliation(s)
- David P Gamblin
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford OX1 3TA, United Kingdom
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63
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Cocinero EJ, Stanca-Kaposta EC, Scanlan EM, Gamblin DP, Davis BG, Simons JP. Conformational choice and selectivity in singly and multiply hydrated monosaccharides in the gas phase. Chemistry 2008; 14:8947-8955. [PMID: 18720336 DOI: 10.1002/chem.200800474] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Factors governing hydration, regioselectivity and conformational choice in hydrated carbohydrates have been examined by determining and reviewing the structures of a systematically varied set of singly and multiply hydrated monosaccharide complexes in the gas phase. This has been achieved through a combination of experiments, including infrared ion-depletion spectroscopy conducted in a supersonic jet expansion, and computation through molecular mechanics, density functional theory (DFT) and ab initio calculations. New spectroscopic and/or computational results obtained for the singly hydrated complexes of phenyl beta-D-mannopyranoside (beta-D-PhMan), methyl alpha-D-gluco- and alpha-D-galactopyranoside (alpha-D-MeGlc and alpha-D-MeGal), when coupled with those reported earlier for the singly hydrated complexes of alpha-D-PhMan, beta-D-PhGlc and beta-D-PhGal, have created a comprehensive data set, which reveals a systematic pattern of conformational preference and binding site selectivity, driven by the provision of optimal, co-operative hydrogen-bonded networks in the hydrated sugars. Their control of conformational choice and structure has been further revealed through spectroscopic and/or computational investigations of a series of multiply hydrated complexes; they include beta-D-PhMan.(H2O)2,3, which has an exocyclic hydroxymethyl group, and the doubly hydrated complex of phenyl alpha-L-fucopyranoside, alpha-L-PhFuc.(H2O)2, which does not. Despite the very large number of potential structures and binding sites, the choice is highly selective with binding invariably "focussed" around the hydroxymethyl group (when present). In beta-D-PhMan.(H2O)2,3, the bound water molecules are located exclusively on its polar face and their orientation is dictated by the (perturbed) conformation of the carbohydrate to which they are attached. The possible operation of similar rules governing the structures of hydrogen-bonded protein-carbohydrate complexes is proposed.
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Affiliation(s)
- Emilio J Cocinero
- Chemistry Department, University of Oxford, Physical and Theoretical Chemistry Laboratory, South Parks Road, Oxford OX1 3QZ, UK
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64
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Portela-Cubillo F, Lymer J, Scanlan EM, Scott JS, Walton JC. Dioxime oxalates; new iminyl radical precursors for syntheses of N-heterocycles. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.08.112] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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65
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Portela-Cubillo F, Scanlan EM, Scott JS, Walton JC. From dioxime oxalates to dihydropyrroles and phenanthridines via iminyl radicals. Chem Commun (Camb) 2008:4189-91. [DOI: 10.1039/b808625g] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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66
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Abstract
Carbamoyl radicals were generated from oxime oxalate amides, and the kinetics of their 4-exo cyclizations onto C=C and C=NO bonds, leading to beta-lactam-containing species, were studied by EPR spectroscopy. DFT computations with model carbamoyl radicals predicted 4-exo ring closures onto C=NO bonds to be facile, especially when tert-butyl substituents were present. The reverse ring-opening reactions were predicted to have much higher activation energies. Experimental evidence also favored slow reverse ring opening.
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Affiliation(s)
- Gino A Dilabio
- School of Chemistry, University of St. Andrews, St. Andrews, Fife, UK KY16 9ST
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67
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Abstract
A mild radical-mediated reduction of organoboranes is reported. The reducing agent is methanol complexed by the Lewis acidic B-methoxycatecholborane.
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Affiliation(s)
- Davide Pozzi
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3000 Bern 9, Switzerland
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68
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Abstract
A general synthetic route to oxime oxalate amides was developed and applied to the preparation of molecules incorporating N-benzyl-N-alkenyl amides linked with acetone oxime or benzaldoxime units. In addition, 2-substituted-thiazolidine-4-carboxylic acid methyl ester amides of oxalyl benzaldoxime were also prepared. It was shown by EPR spectroscopy that the oxalyl benzaldoxime amides dissociated to produce benziminyl and carbamoyl (aminoacyl) radicals when photolysed with 4-methoxyacetophenone as a photosensitizer. Carbamoyl radicals derived from N-alk-3-enyl oxime oxalate amides underwent ring closure to afford pyrrolidin-2-ones. The analogous N-alk-2-enyl precursors afforded azetidin-2-ones. Reactions of the cyclohexenyl and cinnamyl oxime oxalate amides afforded a bicyclic beta-lactam and a 3-benzyl-substituted beta-lactam respectively. Interestingly, both products were isolated as hydroxylated compounds. A thiazolidine-derived oxime oxalate amide containing an isobutenyl side chain also dissociated with production of the corresponding thiazolidinyl-carbamoyl radical, as shown by EPR spectroscopy. GC-MS evidence indicated that this radical cyclised to afford some of the corresponding penicillin derivative
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Affiliation(s)
- Eoin M Scanlan
- University of St. Andrews, School of Chemistry, St. Andrews, Fife, UK KY16 9ST
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69
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Abstract
Photosensitized decomposition of oxime oxalate amides is a useful new route to carbamoyl radicals that may cyclise to afford beta- or gamma-lactams.
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Affiliation(s)
- Eoin M Scanlan
- University of St. Andrews, School of Chemistry, St. Andres, Fife, UK KY16 9ST
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