Helvetica chimica acta

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  Año 1993, Vol. 76, Número 8

  • Warum Pentose- und nicht Hexose-Nucleinsaeuren? Teil IV. `Homo-DNS': ^1H-, ^1^3C-, ^3^1P- und ^1^5N-NMR-spektroskopische Untersuchung von ddGlc(A-A-A-A-A-T-T-T-T-T) in waessriger Loesung

    pág. 2701

    

  • A New Helicopodand: Molecular Recognition of Dicarboxylic Acids with High Diastereoselectivity

    pág. 2757

    

  • Synthesis, Structure, and Antimalarial Activity of Tricyclic 1,2,4-Trioxanes Related to Artemisinin

    pág. 2775

    

  • HPLC and ^1H-NMR Studies of Alkaline Hydrolysis of Some 7-(Oxyiminoacyl)cephalosporins

    pág. 2789

    

  • Rhodium(II)-Catalyzed Decomposition of á,gamma-Unsaturated Diazo Compounds

    pág. 2803

    

  • Sponge-Derived Polyunsaturated C~1~6 Di- and Tribromocarboxylic Acids

    pág. 2814

    

  • 3-(Acylamino)-3-amino-2-nitroacrylonitriles from N-Acyl-S-methyl-3,3-diamino-2-nitroacrylthioimidates

    pág. 2817

    

  • A Novel Synthesis of 2,2-Disubstituted 3-Amino-2H-azirines Based on the Reaction between Amide Enolates and Diphenyl Phosphorochloridate

    pág. 2830

    

  • Synthesis and Electron-Diffraction Structure of all-cis-[5.5.5.5]Fenestrane

    pág. 2838

    

  • Glycosylidene Carbenes. Part 13. Synthesis and Thermolysis of Representative 1-Azi-glycoses

    pág. 2847

    

  • Cationic Rh^I Complexes of Azulenes and Their Catalytic Activity on the Formation of Heptalene-1,2-dicarboxylates from Dimethyl Acetylenedicarboxylate and Azulenes

    pág. 2876

    

  • Thermal Reaction of Azulene-1-carbaldehydes with Dimethyl Acetylenedicarboxylate

    pág. 2887

    

  • Synthesis and Chiroptical Properties of Dimethyl 8,12-Diphenylbenzo[d]heptalene-6,7-dicarboxylate

    pág. 2906

    

  • Synthesis, Reactivity, and Fluxional Behaviour of [Ir~2Rh~2(CO)~1~2], and Crystal Structure of [Ir~2Rh~2(CO)~8(norbornadiene)~2]

    pág. 2913

    

  • Solution Equilibria in Trialkyl-Phosphite Derivatives of [Ir~4(CO)~1~2]. Crystal Structure of [Ir~4(CO)~1~1{P(OCH~2)~3CEt}]

    pág. 2926

    

  • Intramolecular Site Exchange of Carbonyl Ligands in the Cluster Compounds Nonacarbonyl{æ~3-[eta^3-(1,3,5-trithiane)]}triruthenium ([Ru~3(CO)~9{æ~3-(eta^3-C~3H~6S~3)}]) and (tert-Butyl Isocyanide)octacarbonyl-{æ~3-[eta^3-(1,3,5-trithiane)]}triruthenium ([Ru~3(t-BuNC)(CO)~8{æ~3-(eta^3-C~3H~6S~3)}])

    pág. 2936

    

  • Photoinduced Molecular Transformations. Part 142. One-Step Syntheses of 1H-Benz[f]indole-4,9-diones and 1H-Indole-4,7-diones by a New Regioselective Photoaddition of 2-Amino-1,4-naphthoquinones and 2-Amino-1,4-benzoquinones with Alkenes

    pág. 2942

    

  • Synthesis and Spectroscopic Characterization of N^2-(N-Acetyl-6-O-stearoyl-à-D-muramoyl)-L-alanyl-D-isoglutamine

    pág. 2951

    

  • Dicarboxylates of 3-Methylidene-á-lactams: Addition Reactions to the Exocyclic Double Bond, Formation of Spiro-á-lactams, and Reductive Ring Opening by Hydrazines

    pág. 2958

    

  • Determination of the Absolute Configuration of Dimethyl (2S,3S)-2-Allyl-3-hydroxyglutarate: A Chiral Building Block for Preparing Branched-Chain Nucleoside Analogues

    pág. 2969

    

  • Breakdown of Chlorophyll: A Tetrapyrrolic Chlorophyll Catabolite from Senescent Rape Leaves

    pág. 2976

    

  • Chemo-enzymatic Synthesis of 6"-O-(3-Arylprop-2-enoyl) Derivatives of the Flavonol Glucoside Isoquercitrin

    pág. 2981

    

  • Lanthanide-Ion Complexation by D-Glucuronic and D-Galacturonic Acids

    pág. 2992