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  • 1.
    Ayesa, Susana
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Argyopoulus, Dimitris
    Maltseva, Tatiana
    Sund, Christian
    Samuelsson, Bertil
    An Expeditious Library Synthesis of N-Monoalkylated Aminopiperidines and –pyrrolidines2004In: European Journal of Organic Chemistry, ISSN 1434-193x, no 12, p. 2723-2737Article in journal (Refereed)
  • 2.
    Balan, Daniela
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Adolfsson, Hans
    Efficient microwave-assisted formation of functionalized 2,5-dihydropyrroles using ruthenium-catalyzed ring-closing metathesis2004In: Tetrahedron Letters, Vol. 45, no 15, p. 3089-3092Article in journal (Refereed)
  • 3. Closson, Adam
    et al.
    Johansson, Mikael
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Bäckvall, Jan-E.
    Ionic liquid-immobilized catalytic system for biomimetic dihydroxylation of olefins2004In: Chemical Communication, ISSN 0366-5607, no 13, p. 1494-1495Article in journal (Refereed)
  • 4.
    Csjernyik, Gábor
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Bogár, Krisztián
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Bäckvall, Jan-E.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    New Efficient Ruthenium Catalysts for Racemization of Alcohols at Room Temperature2004In: Tetrahedron Letters, ISSN 0040-4039, E-ISSN 1359-8562, Vol. 45, no 36, p. 6799-6802Article in journal (Refereed)
    Abstract [en]

    5-Pentaphenylcyclopentadienyl)RuCl(CO)2 was found to catalyze efficiently the racemization of chiral alcohols such as (S)-1-phenylethanol, (S)-1-phenylpropan-2-ol, (S)-4-phenylbutan-2-ol and (S)-4-methoxy-1-phenylethanol at room temperature in the presence of a base. The catalytic activity of three other Ru(II) complexes was also investigated. The effects of halide and solvent were studied as well.

  • 5. Córdova, A
    et al.
    Sundén, H
    Engqvist, Magnus
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    The Direct Amino Acid-Catalyzed Asymmetric Incorporation of Molecular Oxygen to Organic Compounds2004In: Journal of the American Chemical Society, ISSN 0002-7863, Vol. 126, no 29, p. 8914-8915Article in journal (Refereed)
  • 6.
    Edin, Michaela
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Bäckvall, Jan-E.
    Córdova, Armando
    Tandem enantioselective organo- and biocatalysis: a direct entry for the synthesis of enantiomerically pure aldols2004In: Tetrahedron Letters, ISSN 0040-4039, E-ISSN 1359-8562, Vol. 45, p. 7697-7701Article in journal (Refereed)
  • 7.
    Edin, Michaela
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Steinreiber, Johannes
    Bäckvall, Jan-E.
    One-pot synthesis of enantiopure syn-1,3-diacetates from racemic diastereomeric mixtures of 1,3-diols by dynamic kinetic asymmetric transformation2004In: Proceedings of the National Academy of Sciences of the United States of America, ISSN 0027-8424, E-ISSN 1091-6490, Vol. 101, p. 5761-5766Article in journal (Refereed)
  • 8.
    Eklund, Robert
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Roscic, Maja
    Nordmark, Eva-Lisa
    Widmalm, Göran
    Horvat, Stefica
    Stereochemical assignment of diastereomeric imidazolidinone ring containing bicyclic sugar-peptide addects: NMR Spectroscopy and molecular calculations2004In: European Journal of Organic Chemistry, ISSN 1434-193X, no 22, p. 4641-4647Article in journal (Refereed)
  • 9.
    Engqvist, Magnus
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Casas, J
    Sundén, H
    Ibrahem, I
    Córdova, A
    Direct Organoctalytic Asymmetric α-Oxidation of Ketones with Iodosobenzene and N-sulfonyloxaziridine2004In: Tetrahedron letters, ISSN 0040-4039, Vol. 46, no 12, p. 2053-2057Article in journal (Refereed)
  • 10.
    Horváth, Attila
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Bäckvall, Jan-Erling
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Mild and Efficient Palladium(II)-Catalyzed Racemization of Allenes2004In: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, no 8, p. 964-965Article in journal (Refereed)
    Abstract [en]

    Allenes undergo racemization in the presence of catalytic amounts of Pd(OAc)2/LiBr under mild conditions; the reaction proceeds via a bromopalladation–debromopalladation sequence and tolerates various functional groups.

     

  • 11.
    Horváth, Attila
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Bäckvall, Jan-Erling
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Benner, Jessica
    Simple, Enantiocontrolled Synthesis of 3-Pyrrolines from α-Amino Allenes2004In: European Journal of Organic Chemistry, ISSN 1434-193X, E-ISSN 1099-0690, Vol. 2004, no 15, p. 3240-3243Article in journal (Refereed)
    Abstract [en]

    Cyclization of -amino allenes in the presence of N-bromosuccinimide afforded pyrrolines in good yields. The products were obtained with high enantiomeric excesses when optically active allenes were used as substrates. The synthesis of a 2,5-dehydroprolinol derivative is also presented.

  • 12. Huang, Ping
    et al.
    Högblom, Joakim
    Anderlund, Magnus F.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Sun, Licheng
    Magnuson, Ann
    Styring, Stenbjörn
    Light-indused multistep oxidation of dinuclear manganese complexes for artificial photosyntesis2004In: Journal of Inorganic Biochemistry, ISSN 0162-0134, Vol. 98, no 5, p. 733-745Article in journal (Refereed)
  • 13.
    Ibrahem, Ismail
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Casas, Jesus
    Cordova, Armando
    Direct Catalytic Enantioselective a-aminomethylation of ketones2004In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 43, p. 6528-Article in journal (Refereed)
  • 14. Johansson, Olof
    et al.
    Wolpher, Henriette
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Borgström, Magnus
    Hammarström, Leif
    Bergquist, Jonas
    Sun, Licheng
    Åkermark, Björn
    Intramolecular charge separation in a hydrogen bonded tyrosine-ruthenium(II)-naphtalene diimide triad2004In: Chemical Communications, ISSN 1359-7345, no 2, p. 194-195Article in journal (Refereed)
  • 15.
    Johansson, Olof
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Wolpher, Henriette
    Borgström, Magnus
    Hammarström, Leif
    Bergquist, Jonas
    Sun, Licheng
    Åkermark, Björn
    Intramolecular charge separation in a hydrogen bonded tyrosune-ruthenium(II) baphthalene diimide triad2004In: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, p. 194-195Article in journal (Refereed)
  • 16.
    Johansson, Tommy
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Stawinski, Jacek
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Nucleoside H-phosphonates.: Part 19. Efficient entry to novel nucleotide analogues with 2-pyridyl and 4-pyridylphosphonothioate internucleotide linkages2004In: Tetrahedron, ISSN 0040-4020, Vol. 60, no 2, p. 389-395Article in journal (Refereed)
    Abstract [en]

    Synthetic and 31P NMR spectroscopy studies resulted in the development of efficient protocols for the stereospecific synthesis of a novel type of nucleotide analogues, 2-pyridyl- and 4-pyridylphosphonothioates. The underlying chemistry involves formation of the P–C bond via a base-promoted reaction of suitably protected dithymidine H-phosphonothioates with N-methoxypyridinium tosylate in acetonitrile, or with trityl chloride in pyridine, to produce high yields of nucleotide analogues with a 2-pyridyl- or 4-pyridyl moiety directly bound to the phosphorus centre.

  • 17.
    Kjellgren, Johan
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Sundén, Henrik
    Szabó, Kálmán J.
    Palladium Pincer-Complex Catalyzed Trimethyltin Substitution of Functionalized Propargylic Substrates: An Efficient Route to Propargyl- and Allenyl-Stannanes2004In: Journal of the American Chemical Society, ISSN 0002-7863, E-ISSN 1520-5126, Vol. 126, no 2, p. 474-476Article in journal (Refereed)
  • 18.
    Lahmann, Martina
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Bülow, Linnea
    Teodorović, Peter
    Gybäck, Helena
    Oscarson, Stefan
    Synthesis of the Lewis b hexasaccharide and HSA-conjugates thereof2004In: Glycoconjugate Journal, ISSN 0282-0080, E-ISSN 1573-4986, Vol. 21, no 5, p. 251-256Article in journal (Refereed)
  • 19.
    Larsson, Andreas
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Urbina, Felipe
    bKarolinska Institute, Department of Microbiology, Pathology and Immunology, Division of Clinical Bacteriology.
    Yang, Zhennai
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Weintraub, Andrej
    Karolinska Institute, Department of Microbiology, Pathology and Immunology, Division of Clinical Bacteriology.
    Widmalm, Göran
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Structural and immunochemical relationship between the O-antegenic polysaccharides from the enteroaggregative Escherichia coli strain 396/C1 and Escherichia coli O1262004In: Carbohydrate Research, ISSN 0008-6215, Vol. 339, no 8, p. 1491-1496Article in journal (Refereed)
    Abstract [en]

    The structure of the O-antigen polysaccharide (PS) from the enteroaggregative Escherichia coli strain 396/C-1 has been determined. Sugar and methylation analyses together with 1H and 13C NMR spectroscopy were the main methods used. Inter-residue correlations were determined by 1H,1H-NOESY, 1H,13C-heteronuclear multiple-bond correlation and dipole–dipole cross-correlated relaxation experiments. The PS is composed of pentasaccharide repeating units with the following structure:

    Full-size image (2K)

    Analysis of NMR data reveals that on average the PS consists of 13 repeating units and indicates that the biological repeating unit contains an N-acetylglucosamine residue at its reducing end. This structure is different to that reported for the O-antigen polysaccharide from E. coli O126. Monospecific anti-E. coli O126 rabbit serum from The International Escherichia and Klebsiella Centre did not distinguish between the E. coli strain 396/C-1 and the E. coli O126 reference strain, neither in slide agglutination nor in an indirect enzyme immunoassay. Subsequent successful serotyping of the E. coli strain 396/C-1 showed it to be E. coli O126:K+:H27.

  • 20.
    Lavén, Gaston
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Nilsson, Johan
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Stawinski, Jacek
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Silylation-Mediated Transesterification of Phenyl H-Phosphonothioate: A New Entry to Nucleoside H-Phosphonothioate Monoesters2004In: European Journal of Organic Chemistry, ISSN 1434-193X, E-ISSN 1099-0690, no 24, p. 5111-5114Article in journal (Refereed)
    Abstract [en]

    O-Phenyl H-phosphonothioate undergoes a facile transesterification with suitably protected nucleosides upon in situ silylation with tert-butyldiphenylsilyl chloride in pyridine/toluene to produce the corresponding 3'-H-phosphonothioates in good yields. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004).

  • 21. Martín-Matute, B.
    et al.
    Edin, M.
    Bogár, Krisztián
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Bäckvall, Jan-E.
    Highly compatible metal and enzyme catalysts for efficient dynamic kinetic resolution of alcohols at ambient temperature2004In: Angewandte Chemie International Edition, ISSN 1433-7851, Vol. 43, no 47, p. 6535-6539Article in journal (Refereed)
  • 22. Martín-Matute, Belén
    et al.
    Edin, Michaela
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Bogár, Krisztián
    Bäckvall, Jan-E.
    Highly compatible metal and enzyme catalysts for efficient dynamic kinetic resolution of alcohols at ambient temperature2004In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 43, p. 6535-6539Article in journal (Refereed)
  • 23.
    Naidoo, Kevin J.
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Chen, Jeff Yu-Jen
    Jansson, Jennie L. M.
    Widmalm, Göran
    Maliniak, Arnold
    Molecular properties related to the anomalous solubility of β-cyclodextrin2004In: Journal of Physical Chemistry B, ISSN 1089-5647, Vol. 108, no 14, p. 4236-4238Article in journal (Refereed)
  • 24.
    Nilsson, Johan
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Stawinski, Jacek
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Controlling Stereochemistry During Oxidative Coupling: Preparation of Rp or Sp Phosphoramidates from One P-Chiral Precursor2004In: Chemical Communications, ISSN 1359-7345, Vol. 22, p. 2566-2567Article in journal (Refereed)
    Abstract [en]

    Stereochemical outcome of oxidative coupling of H-phosphonate diesters with amines, promoted by iodine, can be controlled to obtain the corresponding phosphoramidate diesters with inversion or with retention of configuration at the phosphorus centre

  • 25. Pan, Jingxi
    et al.
    Xu, Yunhua
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Benkö, Gabor
    Feyziyev, Yashar
    Styring, Stenbjörn
    Sun, Licheng
    Åkermark, Björn
    Polivka, Tomas
    Sundström, Villy
    Stepwise Charge Separation from a Ruthenium-Tyrosine Complex to a Nanocrystalline TiO2 Film2004In: The Journal of Physical Chemistry B, ISSN 1089-5647, Vol. 108, no 34, p. 12904-12910Article in journal (Refereed)
  • 26. Pan, Jingxi
    et al.
    Xu, Yunhua
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Sun, Licheng
    Sundström, Villy
    Polivka, Tomas
    Carotenoid and Pheophytin on Semiconductor Surface: Self-Assembly and Photoinduced Electron Transfer2004In: Journal of the American Chemical Society, Vol. 126, no 10, p. 3066-3067Article in journal (Refereed)
  • 27.
    Samec, Joseph S M
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Éll, Alida H
    Bäckvall, Jan-E
    Mechanism of hydrogen transfer to imines from a hydroxycyclopentadienyl ruthenium hydride: Support for a stepwise mechanism2004In: Chemical Communications, ISSN 1359-7345, no 23, p. 2748-2749Article in journal (Refereed)
  • 28. Segerstedt, Eva
    et al.
    Mannerstedt, Karin
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Johansson, Mikael
    Oscarson, Stefan
    Synthesis of the Branched Trisaccharide L-Glycero-α-D-manno-heptopyranosyl-(1→3)-[β-D-glucopyranosyl-(1→4)]-L-glycero-α-D-manno-heptopyranose, Protected to Allow Flexible Access to Neisseria and Haemophilus LPS Inner Core Structures2004In: Journal of carbohydrate chemistry, ISSN 0732-8303, Vol. 23, no 8&9, p. 443-452Article in journal (Refereed)
  • 29.
    Solin, Niclas
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Kjellgren, Johan
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Szabó, Kálmán J.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Pincer complex catalyzed allylation of aldehyde and imine substrates via nucleophilic η1-allyl palladium intermediates: A new concept for palladium catalyzed allylic substitution reactions2004In: Journal of the American Chemical Society, ISSN 0002-7863, E-ISSN 1520-5126, Vol. 126, no 22, p. 7026-7033Article in journal (Refereed)
  • 30.
    Staaf, Mikael
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Söderman, Peter
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Höög, Christer
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Widmalm, Göran
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Determination of conformational flexibility of methyl α-cellobioside in solution by NMR spectroscopy and molecular simulations*2004In: Journal of Physical Chemistry A, ISSN 1089-5639, Vol. 108, no 18, p. 3932-3937Article in journal (Refereed)
    Abstract [en]

    The conformational flexibility of methyl α-cellobioside in water and dimethyl sulfoxide solutions was investigated by 1D 1H,1H T-ROESY experiments. In combination with molecular dynamics simulations, effective proton−proton distances could be derived using experimentally determined cross-relaxation rates. An anti-ψ-conformational state was present in both solvents confirming a previous flexibility hypothesis at this torsion angle. In water solution, an anti-φ-conformational state was also detected and quantified. These results show that already at the disaccharide level a large flexibility is present at the glycosidic linkage. In addition to the syn-conformation which is present to 93% for the title compound in water solution, the minor anti-φ- and anti-ψ-conformational states are populated to 2% and 5%, respectively.

  • 31. Sundén, H
    et al.
    Engqvist, Magnus
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Casas, J
    Córdova, A
    Direct Amino Acid-Catalyzed Asymmetric α-Oxidation of Ketones with Molecular Oxygen2004In: Angewandte Chemie, ISSN 0044-8249, Vol. 116, no 47, p. 6694-6697Article in journal (Refereed)
  • 32.
    Wallner, Olov
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Szabó, Kálmán J
    Palladium Pincer Complex-Catalyzed Allylic Stannylation with Hexaalkylditin Reagents2004In: Organic Letters, ISSN 1523-7060, Vol. 6, no 11, p. 1829-1831Article in journal (Refereed)
  • 33. Wolpher, Henriette
    et al.
    Johansson, Olof
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Abrahamsson, Maria
    Kritikos, Mikael
    Sun, Licheng
    Åkermark, Björn
    A tridentate ligand for preparation of bisterpyridine-like ruthenium(II) complexes with an increased excited state lifetime2004In: Inorganic Chemistry Communications, ISSN 1387-7003, Vol. 7, no 3, p. 337-340Article in journal (Refereed)
  • 34.
    Wolpher, Henriette
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Johansson, Olof
    Abrahamsson, Maria
    Kritikos, Mikael
    Sun, Licheng
    Åkermark, Björn
    A tridentate ligand for preparation of bisterpyridine-like ruthenium(II) complexes with an increased excited state lifetime2004In: Inorganic Chemistry Communications, ISSN 1387-7003, Vol. 7, no 3, p. 337-340Article in journal (Refereed)
1 - 34 of 34
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