Helvetica chimica acta

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  Año 2004, Vol. 87, Número 8

  • Determination of the Dimerization Equilibrium Constants of Omeprazole and Pirkle's Alcohol through Optical-Rotation Measurements

    R. Baciocchi

    págs. 1917-1926

    

  • Stereoelectronic Effects in the Iodine-Promoted Oxidation of Pentacyclic Tetrahydroisoquinolines

    B. Miehlich, O. Koepler, S. Laschat

    págs. 1927-1934

    

  • An Effective and Convenient Method for the Preparation of KAD-1229

    J. Liu, Y. Yang

    págs. 1935-1939

    

  • Synthesis, Spectroscopic Studies, and Crystal Structures of Phenylorganotin Derivatives with [Bis(2,6-dimethylphenyl)amino]benzoic Acid: Novel Antituberculosis Agents

    D. Kovala-Demertzi, V. Dokorou

    págs. 1940-1950

    

  • Two Novel ent-Abietane Diterpenoids from Isodon xerophilus

    S.-H. Li, X.-M. Niu

    págs. 1951-1957

    

  • Efficient Synthesis of alpha,beta-Epoxy Carbonyl Compounds in Acetonitrile: Darzens Condensation of Aromatic Aldehydes with Ethyl Chloroacetate

    Z.-T. Wang

    págs. 1958-1962

    

  • Lycopodine-Type Lycopodium Alkaloids from Huperzia serrata

    C.-H. Tan, D.-Y. Zhu

    págs. 1963-1967

    

  • Thermal Isomerization of Isoborneols and Dehydroisoborneols to New Chiral Building Blocks in Terpenoid Synthesis

    G. Ruedi, H.-J. Hansen

    págs. 1968-1989

    

  • An Unusual Domino Retro-Ene-Conia Reaction: Regio- and Stereoselective One-Carbon Ring Expansion of Fenchol Derivatives

    H.-J. Hansen, D. N. Laikov, G. Ruedi

    págs. 1990-2021

    

  • Three New Homologous 3-Alkyl-1,4-benzoquinones from the Fruiting Bodies of Daldinia concentrica

    J.-K. Liu, X.-D. Qin

    págs. 2022-2024

    

  • Ozonolyse von Enolethern 10. Mitteilung. Ozonisierung von Enolethern aus 1,2- und 1,3-Dicarbonyl-Verbindungen: direkte quantitative Synthese von Phthalonsaure-anhydrid

    K. Schank

    págs. 2025-2049

    

  • Berchemins A and B: Novel Enzyme-Inhibiting Dimeric Lignan Glycosides from Berchemia pakistanica

    N. Mukhtar

    págs. 2050-2056

    

  • Aurophilic towards H-Bonding Interactions in Phosphine-pyrazolato-gold(I) Complexes: Luminescence Studies and Crystal Structure of {3,5-Bis-[4-(octyloxy)phenyl]-1H-pyrazolato-kappaN^1}(triphenylphosphine)gold-{3,5-Bis-[4-(octyloxy)phenyl]-1H-pyrazole] ([Au(pz^o^p^~2)(PPh~3)]·(Hpz^o^p^~2))

    P. Ovejero

    págs. 2057-2065

    

  • Isolation and Structure Elucidation of Enniatins L, M~1, M~2, and N: Novel Hydroxy Analogs

    P. Vongvilai

    págs. 2066-2073

    

  • Der Mechanismus der Alken-Ozonolyse - eine kritische Betrachtung

    K. Schank

    págs. 2074-2084

    

  • A New Diterpenoid Alkaloid from Aconitum episcopale

    J. Zhao, Z. Y. Li, J.-H. Yang, H. B. Zhang

    págs. 2085-2087

    

  • Phosphorus-Nitrogen Compounds: Novel Spirocyclic Phosphazene Derivatives. Structure of 3,3"-Propane-1,3-diylbis[4',4',6',6'-tetrachloro-3,4-dihydrospiro-[1,3,2-benzoxazaphosphorine-2,2'Lambda^5-[4Lambda^5,6Lambda^5][1,3,5,2,4,6]triazatriphosphorine]]

    S. Bilge, A. Natsagdorj

    págs. 2088-2099

    

  • Natural p-Menthene Monoterpenes: Synthesis of the Enantiomeric Forms of Wine Lactone, Epi-wine Lactone, Dill Ether, and Epi-dill Ether Starting from a Common Intermediate

    S. Serra, C. Fuganti

    págs. 2100-2109

    

  • Seven New Norditerpenoid Alkaloids from Spanish Consolida orientalis

    A. Alva, M. Grandez, A. Madinaveitia, Gabriel de la Fuente Martín

    págs. 2110-2119

    

  • A New Preparation of 1,3,3-Trimethylbicyclo[2.2.2]octan-2,6-dione, a Never Isolated Intermediate in a Total Synthesis of (+)-Norpatchoulenol. Formal Total Synthesis of (+/-)-Iso-Norpatchoulenol

    A. La Bella, F. Leonelli, I. De Salve, L. M. Migneco, R. M. Bettolo

    págs. 2120-2124

    

  • Acovulparine, a New Norditerpene Alkaloid from Aconitum vulparia

    I. Mathe, P. Forgo, J. Hohmann, D. Csupor

    págs. 2125-2130

    

  • A Pair of Novel Heptentriol Stereoisomers from the Ascomycete Daldinia concentrica

    J.-K. Liu, F. Wang

    págs. 2131-2134

    

  • Voltammetry as a Virtual Potentiometric Sensor in Modelling of a Metal/Ligand System and Refinement of Stability Constants Part 2. Differential-Pulse- and Sampled-Current-Polarographic and Virtual Free-Metal-Ion Potentiometric Study of a Bismuth(III)/Picolinic Acid/Hydroxide System

    A. van Aswegen, J. M. Zhang, I. Cukrowski

    págs. 2135-2158

    

  • Confirmation of the Absolute (3R,3'S,6'R)-Configuration of (all-E)-3'-Epilutein

    P. Molnar

    págs. 2159-2168

    

  • (E/Z)-Isomerization of 3'-Epilutein

    P. Molnar

    págs. 2169-2179