Volume 81; Issue 5-8

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Helvetica Chimica Acta
Volume 81; Issue 5-8

Helvetica Chimica Acta

Volume 81; Issue 5-8

1

Masthead

Journal:

Helvetica Chimica Acta

Year:

1998

File:

PDF, 29 KB

1998

2

Synthesis of Oligonucleotides Containing 2′-Deoxyisoguanosine and 2′-Deoxy-5-methylisocytidine Using Phosphoramidite Chemistry

Simona C. Jurczyk, Janos T. Kodra, J. David Rozzell, Steven A. Benner, Thomas R. Battersby

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 1.13 MB

english, 1998

3

Selective Derivatization of the Ionophore X-206 at C(22) Maintaining Potassium Binding

Anthony C. O'Sullivan, Fritz Struber

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 1.16 MB

english, 1998

4

A Novel Hydrocarbon, 8,10-Dimethylidenetricyclo[7.1.1.02,7]undeca-2,4,6-triene: Synthesis of benzopinane skeleton via di-π-methane rearrangement of benzonorbornadiene system

Aliye Altundaş, Nihat Akbulut, Metin Balci

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 442 KB

english, 1998

5

Kinetic Study of the Reaction of Pyridoxal 5′-Phosphate with Hydrazino Compounds of Pharmacological Activity

Gerardo R. Echevarría-Gorostidi, Andrea Basagoitia, Eliana Pizarro, Ruth Goldsmid, José G. Santos Blanco, Francisco García Blanco

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 387 KB

english, 1998

6

An Unusual Acyliminium Cyclization and Other Drawbacks during an Attempted Synthesis of a Chiral Primary α-Phosphinoalkanamine

Jens Christoffers

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 498 KB

english, 1998

7

Cooperative Interactions of the Catalytic Nucleophile and the Catalytic Acid in the Inhibition of β-Glycosidases. Calculations and their validation by comparative kinetic and structural studies of the inhibition of glycogen phosphorylase b

Tom D. Heightman, Andrea Vasella, Katerina E. Tsitsanou, Spyros E. Zographos, Vicky T. Skamnaki, Nikos G. Oikonomakos

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 1.14 MB

english, 1998

8

Synthesis and Some Transformations of 2-Acetamido-5-amino-3,4,6-tri-O-benzyl-2,5-dideoxy-D-glucono-1,5-lactam

Thierry Granier, Andrea Vasella

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 1.16 MB

english, 1998

9

NMR Verification of Helical Conformations of Phycocyanobilin in Organic Solvents

Bernd Knipp, Martin Müller, Nils Metzler-Nolte, Teodor S. Balaban, Silvia E. Braslavsky, Kurt Schaffner

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 846 KB

english, 1998

10

Aldehyde-Promoted Addition of 2-(Trimethylsilyl)thiazole to α,α′-Dialkoxy Ketones: A new way to branched-chain monosaccharides

Michela Carcano, Andrea Vasella

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 2.09 MB

english, 1998

11

Heterosupramolecular Chemistry: Synthetic strategies for the covalent and noncovalent assembly and organization of nanocrystals and molecules

S. Nagarajo Rao, Donald Fitzmaurice

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 633 KB

english, 1998

12

Distamycin-NA: A DNA analog with an aromatic heterocyclic polyamide backbone. Part 2. Solid-phase synthesis of distamycin-NAs containing the nucleobase uracil: Unexpected solvent participation in the coupling step

Guido Sauter, Christian Leumann

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 1.02 MB

english, 1998

13

β2- and β3-Peptides with Proteinaceous Side Chains: Synthesis and solution structures of constitutional isomers, a novel helical secondary structure and the influence of solvation and hydrophobic interactions on folding

Dieter Seebach, Stefan Abele, Karl Gademann, Gilles Guichard, Tobias Hintermann, Bernhard Jaun, Jennifer L. Matthews, Jürg V. Schreiber, Lukas Oberer, Ulrich Hommel, Hans Widmer

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 5.83 MB

english, 1998

14

γ-Peptides Forming More Stable Secondary Structures than α-Peptides: Synthesis and helical NMR-solution structure of the γ-hexapeptide analog of H-(Val-Ala-Leu)2-OH

Tobias Hintermann, Karl Gademann, Bernhard Jaun, Dieter Seebach

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 2.36 MB

english, 1998

15

Second-Generation Trifluoromethyl-Substituted Chiral Dendrimers Containing Triply Branched Building Blocks: CF3 as sensitive NMR probe for ‘remote’ diastereotopicity

Guy Greiveldinger, Dieter Seebach

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 1.92 MB

english, 1998

16

Antitumor Agents. Part 184. Syntheses and antitubulin activity of compounds derived from reaction of thiocolchicone with amines: Lactams, alcohols, and ester analogs of allothiocolchicinoids

Qian Shi, Ke Chen, Arnold Brossi, Pascal Verdier-Pinard, Ernest Hamel, Andrew T. McPhail, Kuo-Hsiung Lee

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 874 KB

english, 1998

17

α-Methylidene-γ-butyrolactones: Synthesis and evaluation of quinolin-2(1H)-one derivatives

Tai-Chi Wang, Yeh-Long Chen, Cherng-Chyi Tzeng, Shorong-Shii Liou, Weng-Feng Tzeng, Ya-Ling Chang, Che-Ming Teng

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 586 KB

english, 1998

18

Origin of the Stereoselectivity in (Ethoxycarbonyl)-, Cyano-, and Phenyl-Substituted (Arylsulfinyl)methyl Radicals

Philippe Renaud, Thierry Bourquard, Pierre-Alain Carrupt, Michéle Gerster

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 1.26 MB

english, 1998

19

Synthesis and Biological Evaluation of 14-Alkoxymorphinans. Part 15. Novel δ opiod receptor antagonists with high affinity and selectivity in the 14-alkoxy-substituted indolomorphinan series

Helmut Schmidhammer, Roland Krassnig, Elisabeth Greiner, Johannes Schütz, Angela White, Ilona P. Berzetei-Gurske

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 381 KB

english, 1998

20

Synthesis of 1-(1H-Imidazol-2-yl)ethane-1,2-diol Derivatives: A novel class of protein kinase C inhibitors

Andreas N. Röhrle, Helmut Schmidhammer

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 473 KB

english, 1998

21

Tetraepoxy[22]annulen(2.2.2.0): Ein neuartiges Tetraepoxy-verbrücktes, neutrales, aromatisches [22]Annulen

Gottfried Märkl, Heinrich Sauer, Jürgen Stiegler, Peter Kreitmeier, Thomas Burgemeister

Journal:

Helvetica Chimica Acta

Year:

1998

File:

PDF, 553 KB

1998

22

8-Fluoro-6-(methoxymethoxy)quinoline: Synthesis and regioselective functionalization via reaction with organolithium compounds

Josef Stadlwieser, Pierre Barbier, Sven Taylor

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 369 KB

english, 1998

23

Aminocyclopentitols from N-Alkylpyridinium Salts: A photochemical approach

Ersin A. Acar, Fabrice Glarner, Ulrich Burger

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 670 KB

english, 1998

24

Synthesis of Vitamin-B12 Derivatives with Peripheral Tris(oxyethylene) Chains

Michael J. Pfammatter, Tamis Darbre, Reinhart Keese

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 664 KB

english, 1998

25

Synthesis of Vitamin-B12 Derivatives with an Electropolymerizable Side Chain

Thomas Otten, Tamis Darbre, Serge Cosnier, Luisa Abrantes, Jorge Correia, Reinhart Keese

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 600 KB

english, 1998

26

Stereochemistry of the Inhibition of δ-Chymotrypsin with Optically Active cis-Decaline-Type Organophosphates: 31P-NMR studies

Stefan Furegati, Walter Ganci, Georg Przibille, Peter Rüedi

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 699 KB

english, 1998

27

8-Azaadenosine and Its 2′-Deoxyribonucleoside: Synthesis and oligonucleotide base-pair stability

Frank Seela, Ingo Münster, Uwe Lüchner, Helmut Rosemeyer

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 995 KB

english, 1998

28

Acridine-Labeled Primers as Tools for the Study of Nonenzymatic RNA Oligomerization

Markus Kurz, Karin Göbel, Christian Hartel, Michael W. Göbel

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 1.47 MB

english, 1998

29

Synthesis of Oligo(3-hydroxybutanoate)(OHB)-Containing Peptides with High Binding Affinity to a Class-I-MHC Protein

Dieter Seebach, Sorana Poenaru, Gerd Folkers, Didier Rognan

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 1.85 MB

english, 1998

30

Hydrogen Isotope Effect on the Isomerization of Peroxynitrous Acid

Sarojini Padmaja, Reinhard Kissner, Patricia L. Bounds, Willem H. Koppenol

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 330 KB

english, 1998

31

Sulfur-Containing Heterocycles Derived by Reaction of ω-Keto Amides with Lawesson's Reagent

Takehiko Nishio

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 417 KB

english, 1998

32

A Novel and Efficient Synthesis of 14-Alkoxy-Substituted Indolo- and Benzofuromorphinans in the Series of Selective δ Opioid Receptor Antagonists

Helmut Schmidhammer, Peter Schwarz, Zhong-Yong Wei

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 569 KB

english, 1998

33

On the Origin of Asymmetric Induction of the Palladium-Catalyzed Allylic Substitution Reaction with Chiral 4,4-Disubstituted 4,5-Dihydro-2-(phosphinoaryl)oxazole Ligands

Silvia Schaffner, Jürgen F. K. Müller, Markus Neuburger, Margareta Zehnder

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 587 KB

english, 1998

34

Isolation of Carotenoids with 3,5,6-Trihydroxy-5,6-dihydro-β-end Groups from Red Paprika (Capsicum annuum)

József Deli, Péter Molnár, Zoltán Matus, Gyula Tóth, Andrea Steck, Hanspeter Pfander

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 537 KB

english, 1998

35

Partial Synthesis and Characterization of Capsokarpoxanthins and 3,6-Epoxcapsanthins

József Deli, Péter Molnár, Zoltán Matus, Gyula Tóth, Andrea Steck, Hanspeter Pfander

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 815 KB

english, 1998

36

Synthesis and Spectroscopic Characterization of 4-Chlorophenyl Isocyanate (= 1-chloro-4-isocyanatobenzene) Adducts with Amino Acids as Potential Dosimeters for the Biomonitoring of Isocyanate Exposure

Marianne Möller, Dietrich Henschler, Gabriele Sabbioni

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 695 KB

english, 1998

37

Asymmetric syn-Dihydroxylation of β-Substituted (2R)-N-(α,β-Enoyl)bornane-10,2-sultams

Jerzy Raczko, Michael Achmatowicz, Artur Jezewski, Christian Chapuis, Zofia Urbañczyk-Lipkowska, Janusz Jurczak

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 853 KB

english, 1998

38

Nucleotides. Part LVI. Synthesis and biological activity of modified (2′–5′)triadenylates containing 2′-terminal 2′,3′-dideoxy-3′-fluoroadenosine derivatives

Evgeny I. Kvasyuk, Tamara I. Kulak, Olga V. Tkachenko, Svetlana L. Sentyureva, Igor A. Mikhailopulo, Robert J. Suhadolnik, Earl E. Henderson, Susan E. Horvath, Ming-Xu Guan, Wolfgang Pfleiderer

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 446 KB

english, 1998

39

New Types of Potentially Antimalarial Agents: Epidioxy-substituted norditerpene and norsesterpenes from the marine sponge Diacarnus levii

Michele D'Ambrosio, Antonio Guerriero, Eric Deharo, Cécile Debitus, Victoria Munoz, Francesco Pietra

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 506 KB

english, 1998

40

Synthesis of Thiophene-Substituted 3H-Naphtho[2,1-b]pyrans, Precursors of Photomodulated Materials

Corinne Moustrou, Nicole Rebière, André Samat, Robert Guglielmetti, Abd Errahim Yassar, Roger Dubest, Jean Aubard

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 632 KB

english, 1998

41

Synthesis of the Spermidine Alkaloid (−)-(4R)-Dihydroisomyricoidine

Albert Horni, Anthony Linden, Manfred Hesse

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 885 KB

english, 1998

42

3-Hydroxy-2-cyanoalk-2-enamides, and 2-Cyano-2-(tetrahydrofuran-2-ylidene)- and 2-Cyano-2-(tetrahydropyran-2-ylidene)acetamides: Synthesis, structure, and solvent-dependent (Z)/(E)-isomerism

Christos Papageorgiou, Kayhan Akyel, Xaver Borer, Lukas Oberer, Grety Rihs

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 533 KB

english, 1998

43

Enantioselektive Synthese von α-substituierten N-Methyl-sulfonamiden. Vorläufige Mitteilung

Dieter Enders, Christian R. Thomas, Gerhard Raabe, Jan Runsink

Journal:

Helvetica Chimica Acta

Year:

1998

File:

PDF, 432 KB

1998

44

Theoretical Parameters to Characterize Antioxidants. Part 2. The cases of melatonin and carvedilol

Eugenia Migliavacca, Jacek Ancerewicz, Pierre-Alain Carrupt, Bernard Testa

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 786 KB

english, 1998

45

Synthesis and Structure Elucidation of a New Potent Sandalwood-Oil Substitute

Jerzy A. Bajgrowicz, Iris Frank, Georg Fráter, Michael Hennig

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 685 KB

english, 1998

46

Glycosylidene Carbenes. Part 27. Glucosidation of titanium dioxide with 1-aziglucoses: Preparation and characterization of modified titanium-dioxide surfaces

Martin Weber, Andrea Vasella, Marcus Textor, Nicholas D. Spencer

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 881 KB

english, 1998

47

A Novel NO2/OH Exchange in α-Nitro Ketones: A mechanistic investigation

Ayçil Yurdakul, Christian Gurtner, Elena-Silvia Jung, Annalaura Lorenzi-Riatsch, Anthony Linden, Armin Guggisberg, Stefan Bienz, Manfred Hesse

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 1.21 MB

english, 1998

48

Monoterpene Dimers from Lisianthius seemannii

Sylvain Rodriguez, Jean-Luc Wolfender, Kurt Hostettmann, Helen Stoeckli-Evans, Mahabir P. Gupta

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 626 KB

english, 1998

49

Minor Coumarins from Calophyllum teysmannii var. inophylloide and Synthesis of Cytotoxic Calanone Derivatives

Shu-Geng Cao, Xiao-Hua Wu, Keng-Yeow Sim, Benny H. K. Tan, Jagadese J. Vittal, Joan T. Pereira, Swee-Hock Goh

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 784 KB

english, 1998

50

Asymmetric synthesis of pentono- and 6-deoxyhexono-δ-lactams via hetero-Diels-Alder reactions with nitroso dienophile

Albert Defoin, Hervé Sarazin, Thierry Sifferlen, Christiane Strehler, Jacques Streith

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 803 KB

english, 1998

51

1,2-Carbonyl Transposition of a Protected Rubanone: Stereoselective synthesis of bicyclic and tricyclic lactams derived from quinidine

Jens Frackenpohl, Peter Langer, H. Martin R. Hoffmann

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 527 KB

english, 1998

52

Synthesis of C-Linked Imino Disaccharides (= Aza-C-disaccharides) with a Pyrrolidine-3,4-diol Moiety Attached at C(3) of Galactose via a Hydroxymethylene Linker and of a 7-(1,2,3-Trihydroxypropyl)-octahydroxyindolizine-1,2,6,8-tetrol

Karin Kraehenbuehl, Sylviane Picasso, Pierre Vogel

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 3.16 MB

english, 1998

53

Makrocyclische [4n + 2]-Hückel-Aromaten bis n = 9 und [4n]-Antiaromaten bis n = 10: Homologe Reihen vom Tetraepoxy[24]-annulen(2.0.2.0) zum Tetraepoxy[40]annulen(12.0.12.0) und vom ‘Tetraoxa-[22]porphyrin(2.0.2.0)’-zum ‘Tetraepoxa[38]porphyrin(12.0.12.0)’-Dikation

Gottfried Märkl, Th. Knott, Peter Kreitmeier, Thomas Burgemeister, F. Kastner

Journal:

Helvetica Chimica Acta

Year:

1998

File:

PDF, 1.10 MB

1998

54

New Enzyme Models of Chloroperoxidase: Improved stability and catalytic efficiency of iron porphyrinates containing a thiolato ligand

Hans-Achim Wagenknecht, Cécile Claude, Wolf-Dietrich Woggon

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 773 KB

english, 1998

55

A Synthetic Receptor for β,β-Carotene: Towards an enzyme mimic for central cleavage

Richard R. French, Jakob Wirz, Wolf-Dietrich Woggon

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 407 KB

english, 1998

56

Nucleotides. Part LVII.. Synthesis of phosphoramidite building blocks of 2′-amino-2′-deoxyribonucleosides: New compounds for oligonucleotide synthesis

Beate Greiner, Wolfgang Pfleiderer

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 1.13 MB

english, 1998

57

Nucleosides. Part LXIII. Acetals as new 2′-O-protecting functions for the synthesis of oligoribonucleotides: Synthesis of uridine building blocks and evaluation of their relative acid stability

Stefan Matysiak, Hans-Peter Fitznar, Ralf Schnell, Wolfgang Pfleiderer

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 1.53 MB

english, 1998

58

Lipase-Catalyzed Acetylation of 3-Substituted 2,3-Dihydro-1H-1,4-benzodiazepin-2-ones: Effect of temperature and conformation on enantioselectivity and configuration

Amir Avdagić, Andreja Lesac, Zsuzsa Majer, Miklòs Hollòsi, Vitomir Šunjić

Journal:

Helvetica Chimica Acta

Year:

1998

Language:

english

File:

PDF, 1.12 MB

english, 1998

59

Erratum

Journal:

Helvetica Chimica Acta

Year:

1998

File:

PDF, 26 KB

1998

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