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  • 1.
    Ahlford, Katrin
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Zaitsev, Alexey B.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Ekström, Jesper
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Adolfsson, Hans
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    A Simple and Efficient Catalyst System for the Asymmetric Transfer Hydrogenation of Ketones2007In: Synlett: Accounts and Rapid Communications in Synthetic Organic Chemistry, ISSN 0936-5214, E-ISSN 1437-2096, no 16, p. 2541-2544Article in journal (Refereed)
  • 2.
    Akhtar, Tashfeen
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Cumpstey, Ian
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Investigations into the synthesis of amine-linked neodisaccharides2007In: Tetrahedron Letters, ISSN 0040-4039, Vol. 48, p. 8673-8677Article in journal (Refereed)
  • 3.
    Ali, Tara
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Weintraub, Andrej
    Widmalm, Göran
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Structural determination of the O-antigenic polysaccharide from Escherichia coli O1662007In: Carbohydrate Research, ISSN 0008-6215, E-ISSN 1873-426X, Vol. 342, no 2, p. 274-278Article in journal (Refereed)
  • 4. Arewång, Carl Johan
    et al.
    Lahmann, Martina
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Oscarson, Stefan
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Tidén, Anna-Karin
    Synthesis of urine drug metabolites: glucuronic acid glycosides of phenol intermediates2007In: Carbohydrate Research, ISSN 0008-6215, Vol. 342, no 7, p. 970-974Article in journal (Refereed)
  • 5.
    Aydin, Juhanes
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Kumar, K. Senthil
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Eriksson, Lars
    Stockholm University, Faculty of Science, Department of Physical, Inorganic and Structural Chemistry.
    Szabó, Kálmán J.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Palladium pincer complex-catalyzed condensation of sulfonimines and isocyanoacetate to imidazoline derivatives. Dependence of the stereoselectivity on the ligand effects2007In: Advanced Synthesis & Catalysis, ISSN 1615-4150, Vol. 349, no 17-18, p. 2585-2594Article in journal (Refereed)
  • 6.
    Aydin, Juhanes
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Kumar, K. Senthil
    Sayah, Mahmoud J.
    Wallner, Olov A.
    Szabó, Kálmán J.
    Synthesis and Catalytic Application of Chiral 1,1‘-Bi-2-naphthol- and Biphenanthrol-Based Pincer Complexes: Selective Allylation of Sulfonimines with Allyl Stannane and Allyl Trifluoroborate2007In: The Journal of Organic Chemistry, ISSN 0022-3263, Vol. 72, no 13, p. 4689-4697Article in journal (Refereed)
  • 7.
    Aydin, Juhanes
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Senthil, Kumar K
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Sayah, Mahmoud J
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Wallner, Olov A
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Szabó, Kálmán J
    Synthesis and catalytic application of chiral 1,1'-Bi-2-naphthol- and biphenanthrol-based pincer complexes: selective allylation of sulfonimines with allyl stannane and allyl trifluoroborate.2007In: Journal of Organic Chemistry, Vol. 72, no 13, p. 4689-4697Article in journal (Refereed)
    Abstract [en]

    New easily accessible 1,1'-bi-2-naphthol- (BINOL-) and biphenanthrol-based chiral pincer complex catalysts were prepared for selective (up to 85% enantiomeric excess) allylation of sulfonimines. The chiral pincer complexes were prepared by a flexible modular approach allowing an efficient tuning of the selectivity of the catalysts. By employment of the different enantiomeric forms of the catalysts, both enantiomers of the homoallylic amines could be selectively obtained. Both allyl stannanes and allyl trifluoroborates can be employed as allyl sources in the reactions. The biphenanthrol-based complexes gave higher selectivity than the substituted BINOL-based analogues, probably because of the well-shaped chiral pocket generated by employment of the biphenanthrol complexes. The enantioselective allylation of sulfonimines presented in this study has important implications for the mechanism given for the pincer complex-catalyzed allylation reactions, confirming that this process takes place without involvement of palladium(0) species.

  • 8. Berggren, Gustav
    et al.
    Kaynak, Filiz Betul
    Anderlund, Magnus F.
    Eriksson, Lars
    Stockholm University, Faculty of Science, Department of Physical, Inorganic and Structural Chemistry.
    Åkermark, Björn
    Department of Organic Chemistry.
    Tetraethylammonium [12,12-diethyl-2,2,9,9-tetramethyl-1,4,7,10-tetraza-5,6-benzotridecane-3,8,11,13-tetra-one(4-)]oxidomanganate(V)2007In: Acta Crystallographica Section E, ISSN 1600-5368, Vol. E63, p. m2672-m2673Article in journal (Refereed)
  • 9. Berner, Simon
    et al.
    Lidbaum, Hans
    Ledung, Greger
    Åhlund, John
    Nilson, Katharina
    Schiessling, Joachim
    Gelius, Ulrik
    Bäckvall, Jan-Erling
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Puglia, Carla
    Oscarsson, Sven
    Electronic and structural studies of immobilized thiol-derivatized cobalt porphyrins on gold surfaces2007In: Applied Surface Science, ISSN 0169-4332, Vol. 253, no 18, p. 7540-7548Article in journal (Refereed)
  • 10.
    Bielawski, Marcin
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Olofsson, Berit
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    High-Yielding One-Pot Synthesis of Diaryliodonium Triflates from Arenes and Iodine or Aryl Iodides2007In: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, no 24, p. 2521-2523Article in journal (Refereed)
    Abstract [en]

    Unsymmetric and symmetric diaryliodonium triflates are synthesized from both electron-deficient and electron-rich substrates in a fast, high yielding, and operationally simple protocol employing arenes and aryl iodides or iodine.

  • 11.
    Bielawski, Marcin
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Zhu, Mingzhao
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Olofsson, Berit
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Efficient and General One-Pot Synthesis of Diaryliodonium Triflates: Optimization, Scope and Limitations2007In: Advanced Synthesis and Catalysis, ISSN 1615-4150, E-ISSN 1615-4169, Vol. 349, no 17-18, p. 2610-2618Article in journal (Refereed)
    Abstract [en]

    Symmetrical and unsymmetrical diaryliodonium triflates have been synthesized from both electron-deficient and electron-rich arenes and aryl iodides with mCPBA and triflic acid. A thorough investigation of the optimization, scope and limitations has resulted in an improved one-pot protocol that is fast, high-yielding, and operationally simple. The reaction has been extended to the direct synthesis of symmetrical iodonium salts from iodine and arenes, conveniently circumventing the need for aryl iodides.

  • 12.
    Bogár, Krisztián
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Bäckvall, Jan-E.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    High-yielding metalloenzymatic dynamic kinetic resolution of fluorinated aryl alcohols2007In: Tetrahedron Letters, ISSN 0040-4039, E-ISSN 1359-8562, Vol. 48, no 31, p. 5471-5474Article in journal (Refereed)
    Abstract [en]

    Dynamic kinetic resolution (DKR) of various fluorinated aryl alcohols by a combination of lipase-catalyzed enzymatic resolution with in situ ruthenium-catalyzed alcohol racemization is described. (R)-Selective Candida antarctica lipase B (CALB) was employed for transesterification of different fluoroaryl alcohols in DKR reactions delivering the corresponding acetates in high yield (97%) with excellent enantiomeric excess (98%).

  • 13.
    Bogár, Krisztián
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Hoyos Vidal, Pilar
    Alcántara León, Andrés R.
    Bäckvall, Jan-E.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Chemoenzymatic Dynamic Kinetic Resolution of Allylic Alcohols: A Highly Enantioselective Route to Acyloin Acetates2007In: Organic Letters, ISSN 1523-7060, E-ISSN 1523-7052, Vol. 9, no 17, p. 3401-3404Article in journal (Refereed)
    Abstract [en]

    Dynamic kinetic resolution (DKR) of a series of sterically hindered allylic alcohols has been conducted with Candida antarctica lipase B (CALB) and ruthenium catalyst 1. The optically pure allylic acetates obtained were subjected to oxidative cleavage to give the corresponding acylated acyloins in high yields without loss of chiral information.

  • 14. Bogár, Krisztián
    et al.
    Martín-Matute, Belén
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Bäckvall, Jan-Erling
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Large-scale ruthenium- and enzyme-catalyzed dynamic kinetic resolution of (rac)-1-phenylethanol2007In: Beilstein Journal of Organic Chemistry, ISSN 1860-5397, Vol. 3, p. artikel nr 50-Article in journal (Refereed)
  • 15. Bäck, Marcus
    et al.
    Johansson, Per-Ola
    Wångsell, Fredrik
    Thorstensson, Fredrik
    Kvarnström, Ingemar
    Ayesa, Susana
    Wähling, Horst
    Pelcman, Mikael
    Jansson, Katarina
    Lindström, Stefan
    Wallberg, Hans
    Classon, Björn
    Rydergård, Christina
    Vrang, Lotta
    Hamelink, Elizabeth
    Hallberg, Anders
    Rosenquist, Åsa
    Samuelsson, Bertil
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Novel potent macrocyclic inhibitors of the hepatitis C virus NS3 protease: use of cyclopentane and cyclopentene P2-motifs2007In: Bioorganic & Medicinal Chemistry, ISSN 0968-0896, Vol. 15, no 22, p. 7184-7202Article in journal (Refereed)
  • 16. Carballeira, José Daniel
    et al.
    Krumlinde, Patrik
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Bocola, Marco
    Vogel, Andreas
    Reetz, Manfred T.
    Bäckvall, Jan-Erling
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Directed evolution and axial chirality: optimization of the enantioselectivity of Pseudomonas aeruginosa lipase towards the kinetic resolution of a racemic allene2007In: Chemical Communications, ISSN 1359-7345, Vol. 20, p. 1913-1915Article in journal (Refereed)
  • 17. Castro, Vasco
    et al.
    Dvinskikh, Sergey V.
    Widmalm, Göran
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Sandström, Dick
    Maliniak, Arnold
    NMR studies of membranes composed of glycolipids and phospholipids2007In: Biochimica et Biophysica Acta, Vol. 1768, no -, p. 2432-2437Article in journal (Refereed)
  • 18. Crovetto, Luis
    et al.
    Paredes, Jose M.
    Rios, Ramon
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Talavera, Eva M.
    Avarez-Pez, Jose M.
    Photophysics of a xanthenic derivative dye useful as an ""On/Off"" fluorescence probe2007In: Journal of Physical Chemistry A, ISSN 1089-5639, E-ISSN 1520-5215, Vol. 111, no 51, p. 13311-13320Article in journal (Refereed)
    Abstract [en]

    The photophysical behavior of a new fluorescein derivative has been explored by using absorption and steady-state and time-resolved fluorescence measurements. The influence of ionic strength, as well as total buffer concentration, on both the absorbance and fluorescence has been investigated. The apparent acidity constant of the dye determined by absorbance is almost independent of the added buffer and salt concentrations. A semiempirical model is proposed to rationalize the variations in the apparent pK(a) values. The excited-state proton-exchange reaction around the physiological pH becomes reversible upon addition of phosphate buffer, inducing a pH-dependent change of the steady-state fluorescence and decay times. Fluorescence decay traces, collected as a function of total buffer concentration and pH, were analyzed by global compartmental analysis, yielding the following values of the rate constants describing excited-state dynamics: k(01) = 1.29 x 10(10) s(-1), k(02) = 4.21 x 10(8) s(-1), k(21)approximate to 3 x 10(6) M-1 s(-1), k(12)(B) = 6.40 x 10(8) M-1 s(-1), and k(21)(B) = 2.61 x 10(7) M-1 s(- 1). The decay rate constant values of k(01), k(21), and k(21)(B), along with the low molar absorption coefficient of the neutral form, mean that coupled decays are practically monoexponential at buffer concentrations higher than 0.02 M and any pH. Thus, the pH and buffer concentration can modulate the main lifetime of the dye.

  • 19.
    Cumpstey, Ian
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Eriksson, Lars
    Department of Physical, Inorganic and Structural Chemistry.
    Bis(methyl 2,4,6-tri-O-acetyl-beta-D-allofuranosid-3-yl)sulfane2007In: Acta Crystallographica Section E, ISSN 1600-5368, Vol. E63, p. o4197-Article in journal (Refereed)
  • 20.
    Dziedzic, Pawel
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Córdova, Armando
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Acyclic beta-amino acid catalyzed asymmetric anti-selective Mannich-type reactions2007In: Tetrahedron: asymmetry, ISSN 0957-4166, E-ISSN 1362-511X, Vol. 18, no 9, p. 1033-1037Article in journal (Refereed)
    Abstract [en]

     The ability of a primary amine containing acyclic beta(3)-amino acids to catalyze direct asymmetric anti-selective Mannich-type reactions is presented. The reactions are generally highly diastereo- and enantioselective to give the corresponding Mannich products with up to >19:1 dr (anti/syn) and 88-99% ee.

  • 21.
    Ekström, Jesper
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Wettergren, Jenny
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Adolfsson, Hans
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    A Simple and Efficient Catalytic Method for the Reduction of Ketones2007In: Advanced Synthesis and Catalysis, ISSN 1615-4150, E-ISSN 1615-4169, Vol. 349, no 10, p. 1609-1613Article in journal (Refereed)
    Abstract [en]

    A range of ketones was efficiently reduced in the presence of catalytic amounts of lithium isopropoxide in 2-propanol under microwave heating, with alcohol products being formed in yields up to 99 %.

  • 22.
    Frigell, Jens
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Cumpstey, Ian
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    First synthesis of 4a-carba-beta-D-galactofuranose2007In: Tetrahedron Letters, ISSN 0040-4039, E-ISSN 1359-8562, Vol. 48, no 52, p. 9073-9076Article in journal (Refereed)
  • 23.
    Färnbäck, Magnus
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Söderman, Peter
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Eriksson, Lars
    Department of Physical, Inorganic and Structural Chemistry.
    Widmalm, Göran
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Methyl 3,4,6-tri-O-acetyl-2-deoxy-2-azido-alpha-D-galactopyranosyl-(1-2)-: [3,4,6-tri-O-acetyl-2-deoxy-2-phthalimido-beta-D-glucopyranosyl-(1-3)]-4-O-benzoyl-alpha-L-rhamnopyranoside n-hexane 0.1-solvate2007In: Acta Crystallographica: Section E, Vol. E63, p. o1581-o1583Article in journal (Refereed)
  • 24. Gao, Weiming
    et al.
    Ekström, Jesper
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Liu, Jianhui
    Chen, Changneng
    Eriksson, Lars
    Department of Physical, Inorganic and Structural Chemistry.
    Weng, Linhong
    Åkermark, Björn
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Sun, Licheng
    Binuclear iron-sulfur complexes with bidentate phosphine ligands as active site models of Fe-hydrogenase and their catalytic proton reduction2007In: Inorganic Chemistry, ISSN 0020-1669, Vol. 46, no 6, p. 1981-1991Article in journal (Refereed)
  • 25. Gao, Weiming
    et al.
    Liu, Jianhui
    Åkermark, Björn
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Sun, Licheng
    Facile and highly efficient light-induced PR3/CO ligand exchange: a novel approach to the synthesis of [(mu-SCH2NnPrCH2S)Fe2(CO)4(PR3)2]2007In: Journal of Organometallic Chemistry, ISSN 0022-328X, Vol. 692, p. 1579-1583Article in journal (Refereed)
  • 26.
    Gao, Yan
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Liu, Jianhui
    Jiang, Wenfeng
    Xia, Ming
    Zhang, Wei
    Li, Minna
    Åkermark, Björn
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Sun, Licheng
    Synthesis and photophysical and electrochemical properties of a binuclear Ru(bpy)3-Cu(III) corrole complex2007In: Journal of Porphyrins and Phthalocyanines, ISSN 1088-4246, Vol. 11, no 5-6, p. 463-469Article in journal (Refereed)
  • 27. Gao, Yan
    et al.
    Liu, Jianhui
    Na, Yong
    Åkermark, Björn
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Sun, Licheng
    Synthesis and characterization of manganese and copper corrole xanthene complexes as catalysts for water oxidation2007In: Tetrahedron, ISSN 0040-4020, Vol. 63, no 9, p. 1987-1994Article in journal (Refereed)
  • 28. Hafrén, Jonas
    et al.
    Córdova, Armando
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Direct Bronsted acid-catalyzed derivatization of cellulose with poly(L-lactic acid) and D-mandelic acid2007In: Nordic Pulp and Paper Research Journal, ISSN 0283-2631, Vol. 22, no 2, p. 184-187Article in journal (Refereed)
  • 29. Hakkarainen, Birgit
    et al.
    Kenne, Lennart
    Lahmann, Martina
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Oscarson, Stefan
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Sandström, Corine
    Spectral assignments and reference data: NMR study of hydroxy protons of di- and trimannosides, substructures of Man-92007In: Magnetic Resonance in Chemistry, ISSN 0749-1581, Vol. 45, no 12, p. 1076-1080Article in journal (Refereed)
  • 30.
    Hiresova, Renata
    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, XXII: Synthesis and properties of new nucleotide analogues - H-phosphonothiolate diesters2007In: Synlett, ISSN 0936-5214, no 17, p. 2748-2752Article in journal (Refereed)
  • 31.
    Ibrahem, Ismail
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Rios, Ramon
    Vesely, Jan
    Hammar, Peter
    Eriksson, Lars
    Himo, Fahmi
    Cordova, Armando
    Enantioselective Organocatalytic Hydrophosphination of α,β- Unsaturated Aldehydes2007In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 46, p. 4507-Article in journal (Refereed)
  • 32.
    Ibrahem, Ismail
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Rios, Ramon
    Vesely, Jan
    Zhao, Guiling
    Cordova, Armando
    Organocatalytic Asymmetric 5-Hydroxyisoxazolidine Synthesis: A Highly Enantioselective Route to β-Amino Acids2007In: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, p. 849-852Article in journal (Refereed)
  • 33.
    Ibrahem, Ismail
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Rios, Ramón
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Vesely, Jan
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Córdova, Armando
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Organocatalytic asymmetric multi-component [C+NC+CC] synthesis of highly functionalized pyrrolidine derivatives2007In: Tetrahedron Letters, ISSN 0040-4039, Vol. 48, no 36, p. 6252-6257Article in journal (Refereed)
  • 34.
    Ibrahem, Ismail
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Rios, Ramón
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Vesely, Jan
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Hammar, Peter
    Eriksson, Lars
    Stockholm University, Faculty of Science, Department of Physical, Inorganic and Structural Chemistry.
    Himo, Fahmi
    Córdova, Armando
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Enantioselective organocatalytic hydrophosphination of alpha,beta-unsaturated aldehydes2007In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 46, p. 4507-4510Article in journal (Refereed)
  • 35.
    Ibrahem, Ismail
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Rios, Ramón
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Vesely, Jan
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Zhao, Gui-Ling
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Córdova, Armando
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Catalytic enantioselective 5-hydroxyisoxazolidine synthesis: an asymmetric entry to beta-amino acids2007In: Synthesis, ISSN 0039-7881, no 7, p. 1153-1157Article in journal (Refereed)
  • 36.
    Ibrahem, Ismail
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Rios, Ramón
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Vesely, Jan
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Zhao, Gui-Ling
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Córdova, Armando
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Organocatalytic asymmetric 5-hydroxyisoxazolidine synthesis: a highly enantioselective route to beta-amino acids2007In: Chemical Communications, p. 849-851Article in journal (Refereed)
  • 37.
    Ibrahem, Ismail
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Sundén, Henrik
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Dziedzic, Pawel
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Rios, Ramón
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Córdova, Armando
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Asymmetric amplification in the amino acid-catalyzed synthesis of amino acid derivatives2007In: Advanced Synthesis & Catalysis, ISSN 1615-4150, Vol. 349, no 11-12, p. 1868-1872Article in journal (Refereed)
  • 38.
    Ibrahem, Ismail
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Sundén, Henrik
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Rios, Ramón
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Zhao, Gui-Ling
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Córdova, Armando
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    One-pot pyrrolidine-catalyzed synthesis of benzopyrans, benzothiopyranes, and dihydroquinolidines2007In: Chimia, ISSN 0009-4293, Vol. 61, no 5, p. 219-223Article in journal (Refereed)
  • 39.
    Ibrahem, Ismail
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Zhao, Guiling
    Cordova, Armando
    Direct Catalytic Enantioselective α-Aminomethylation of Aldehydes2007In: Chemistry - A European Journal, ISSN 0947-6539, E-ISSN 1521-3765, Vol. 13, p. 683-Article in journal (Refereed)
  • 40.
    Ibrahem, Ismail
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Zhao, Gui-Ling
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Córdova, Armando
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Direct catalytic enantioselective alpha-aminomethylation of aldehydes2007In: Chemistry: a European journal, Vol. 13, p. 683-688Article in journal (Refereed)
  • 41. Jiang, Shi
    et al.
    Liu, Jianhui
    Shi, Yu
    Wang, Zhen
    Åkermark, Björn
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Sun, Licheng
    Fe-S complexes containing five-membered heterocycles: novel models for the active site of hydrogenases with unusual low reduction potential2007In: Dalton Transactions, ISSN 1477-9226, no 8, p. 896-902Article in journal (Refereed)
  • 42. Jiang, Shi
    et al.
    Liu, Jianhui
    Shi, Yu
    Wang, Zhen
    Åkermark, Björn
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Sun, Licheng
    Preparation, characteristics and crystal structures of novel N-heterocyclic carbene substituted furan- and pyridine-containing azadithiolate Fe-S complexes2007In: Polyhedron, ISSN 0277-5387, Vol. 26, no 7, p. 1499-1504Article in journal (Refereed)
  • 43.
    Kalek, Marcin
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Stawinski, Jacek
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Pd(0)-Catalyzed phosphorus-carbon bond formation: Mechanistic and synthetic studies on the role of the palladium sources and anionic additives2007In: Organometallics, ISSN 0276-7333, E-ISSN 1520-6041, Vol. 26, no 24, p. 5840-5847Article in journal (Refereed)
    Abstract [en]

    Pd(PPh3)4, Pd(dba)2, Pd(OAc)2, and PdCl2, have been evaluated as possible Pd(0) sources for the palladium-catalyzed P−C bond formation via a cross-coupling of aryl halides with H-phosphonate diesters. It was found that the most efficient catalytic system can be generated from Pd(OAc)2 with a key role being played by Pd(II) and Pd(0) species with coordinated acetate ions. The reactivity of differently ligated Pd(II) complexes was determined, and 31P NMR spectroscopy studies were carried out to provide mechanistic interpretations for the observed differences between the catalytic systems.

  • 44.
    Kasrayan, Alex
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Bocola, Marco
    Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany.
    Sandström, Anders G.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Lavén, Gaston
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Bäckvall, Jan-Erling
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Prediction of the Candida antarctica lipase A protein structure by comparative modeling and site-directed mutagenesis2007In: ChemBioChem (Print), ISSN 1439-4227, E-ISSN 1439-7633, Vol. 8, no 12, p. 1409-1415Article in journal (Refereed)
    Abstract [en]

    A number of model structures of the CalA suggested by comparative modeling were tested by site-directed mutagenesis. Enzyme variants were created where amino acids predicted to play key roles for the lipase activity in the different models were replaced by an inert amino acid (alanine). The results from activity measurements of the overproduced and purified mutant enzymes indicate a structure where the active site consists of amino acid residues Ser184, His366, and Asp334 and in which there is no lid. This model can be used for future targeted modifications of the enzyme to obtain new substrate acceptance, better thermostability, and higher enantioselectivity.

  • 45. Kraszewski, Adam
    et al.
    Stawinski, Jacek
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    H-Phosphonates: versatile synthetic precursors to biologically active phosphorus compounds2007In: Pure and Applied Chemistry, ISSN 0033-4545, Vol. 79, no 12, p. 2217-2227Article in journal (Refereed)
  • 46. Lindh, Jonas
    et al.
    Enquist, Per-Anders
    Pilotti, Åke
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Nilsson, Peter
    Larhed, Mats
    Efficient palladium(II) catalysis under air. Base-free oxidative Heck reactions at room temperature or with microwave heating.2007In: Journal of Organic Chemistry, ISSN 0022-3263, Vol. 72, p. 7957-7962Article in journal (Refereed)
  • 47.
    Mannerstedt, Karin
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Ekelöf, Kerstin
    Oscarson, Stefan
    Evaluation of Thioglycosides of Kdo as Glycosyl Donor2007In: Carbohydrate Research, ISSN 0008-6215, E-ISSN 1873-426X, Vol. 342, no 3-4, p. 631-637Article in journal (Refereed)
    Abstract [en]

    The use of Kdo thioglycosides as glycosyl donors using DMTST, IBr/AgOTf and NIS/AgOTf as promoters has been evaluated. Activation at low temperature allowed to escape the formation of 2,3-glycal byproducts to give glycosides in high yield and with good β-anomeric selectivity. The use of diethyl ether as solvent and (especially) isopropylidene acetals as protecting groups improved the α-anomeric selectivity. NIS/AgOTf as promoter surprisingly yielded the 3-iodo-product via the glycal intermediate.

  • 48.
    Mannerstedt, Karin
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Ekelöf, Kerstin
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Oscarson, Stefan
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Evaluation of thioglycosides of Kdo as glycosyl donors2007In: Carbohydrate Research, ISSN 0008-6215, Vol. 342, no 3-4, p. 631-637Article in journal (Refereed)
  • 49. Martín-Matute, Belén
    et al.
    Bäckvall, Jan-Erling
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Dynamic kinetic resolution catalyzed by enzymes and metals2007In: Current Opinion in Chemical Biology, Vol. 11, p. 226-232Article in journal (Refereed)
  • 50.
    Martín-Matute, Belén
    et al.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Åberg, Jenny B.
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Edin, Michaela
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Bäckvall, Jan-Erling
    Stockholm University, Faculty of Science, Department of Organic Chemistry.
    Racemization of secondary alcohols catalyzed by cyclopentadienyl-ruthenium complexes: evidence for an alkoxide pathway by fast beta-hydride elimination-readdition2007In: Chemistry: a European journal, ISSN 0947-6539, Vol. 13, no 21, p. 6063-6072Article in journal (Refereed)
123 1 - 50 of 102
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