Volume 64; Issue 5

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Helvetica Chimica Acta
Volume 64; Issue 5

Helvetica Chimica Acta

Volume 64; Issue 5

1

Masthead

Journal:

Helvetica Chimica Acta

Year:

1981

File:

PDF, 41 KB

1981

2

Photochemische Reaktionen. 121. Mitteilung. Zur Photochemie von ε,ζ-Methano-α,γ-dienonen und 7,8-Methano-1,3,5-trienen

Keitaro Ishii, Bruno Frei, Hans Richard Wolf, Oskar Jeger

Journal:

Helvetica Chimica Acta

Year:

1981

File:

PDF, 787 KB

1981

3

Novel Approach to the Synthesis of 6-Substituted 5,6-Dihydro-2(2H)-pyranones

Charles Fehr, José Galindo, Günther Ohloff

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

english

File:

PDF, 587 KB

english, 1981

4

Synthese von diastereo- und enantio-selektiv deuterierten β,ε-, β,β-, β,γ- und γ,γ-Carotinen

Hans Peter Märki, Conrad Hans Eugster

Journal:

Helvetica Chimica Acta

Year:

1981

File:

PDF, 2.00 MB

1981

5

A 13C-NMR. Study of naphthalene chromium complexes. Correlation with reactivity: Nucleophilic aromatic substitution reactions

Vincent Desobry, Ernst Peter Kündig

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

english

File:

PDF, 600 KB

english, 1981

6

Structure-Activity Relationships of Oxygenated Morphinans. I. 4-Mono- and 3,4-dimethoxy-N-methylmorphinans and -N-methyl-morphinan-6-ones with unusually high antinociceptive potency. Preliminary communication

Arthur E. Jacobson, Fu-Lian Hsu, Maria D. Rozwadowska, Helmut Schmidhammer, Louise Atwell, Arnold Brossi, Fedor Medzihradsky

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

english

File:

PDF, 335 KB

english, 1981

7

2-Oxocephems and 2-Acetylpenems - Selective Formation in an Intramolecular Wittig Reaction

Ivan Ernest, Alan J. Main, Robert B. Woodward

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

english

File:

PDF, 545 KB

english, 1981

8

The Electronic Structure of Phenylene and Naphthylene Bicyclobutanes. Photoelectron spectroscopy and model calculations

Rolf Gleiter, Klaus Gubernator, Mirjana Eckert-Maksić, Jens Spanget-Larsen, Bernard Bianco, Gérard Gandillon, Ulrich Burger

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

english

File:

PDF, 463 KB

english, 1981

9

Von der basenkatalysierten Ringöffnung von 2H-Azirinen zu einer α-Alkylierungsmethode von primären Aminen

Adrian Heinz Schulthess, Hans-Jürgen Hansen

Journal:

Helvetica Chimica Acta

Year:

1981

File:

PDF, 1002 KB

1981

10

Lithiierung in α-Stellung zum N-Atom von Triphenylacetamiden aus cyclischen sekundären Aminen. Umlagerung metallierter Triphenylacetamide unter 1,3-Verschiebung der Carbamoylgruppe

Werner Wykypiel, Jean-Jaques Lohmann, Dieter Seebach

Journal:

Helvetica Chimica Acta

Year:

1981

File:

PDF, 611 KB

1981

11

Multiple Wagner-Meerwein Shift. Biogenesis-like conversion of (±)-Δ7,8-Protoilludene to (±)-Hirsutene and related reactions

Kiyoharu Hayano, Yasufumi Ohfune, Haruhisa Shirahama, Takeshi Matsumoto

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

english

File:

PDF, 859 KB

english, 1981

12

The Crystal Structure of the Pentaphenylethane/Acetone Solvate by X-Ray Analysis

Gerald Bernardinelli, Raymond Gerdil

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

english

File:

PDF, 405 KB

english, 1981

13

A Dynamic Study of the Stereoisomerization of Pentaphenylethane by Molecular Mechanics Methods

Gerald Bernardinelli, Raymond Gerdil

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

english

File:

PDF, 476 KB

english, 1981

14

Eine neue Synthese von DL-Armentomycin und verwandten 2-Amino-4-polyhalobuttersäuren

Franz Heinzer, Pierre Martin

Journal:

Helvetica Chimica Acta

Year:

1981

File:

PDF, 542 KB

1981

15

A Stereocontrolled Access to (±)-, (−)-, and (+)-Patchouli Alcohol

Ferdinand Näf, René Decorzant, Wolfgang Giersch, Günther Ohloff

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

english

File:

PDF, 632 KB

english, 1981

16

Steroids and Sexhormones. Part 265. Limonin, Part VI. Synthesis of a model compound incorporating rings D and E of 14,15-deepoxylimonin

Gerhard Emmer, Walter Graf

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

english

File:

PDF, 530 KB

english, 1981

17

Cyclizations of the C10 Fatty Acids from the Mandibulary Glands of the Honeybee Apis mellificaL.: Queen substance and royal jelly acid

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

english

File:

PDF, 324 KB

english, 1981

18

Synthesis of Open-Chain 2,3-Disubstituted 4-nitroketones by Diastereoselective Michael-addition of (E)-Enamines to (E)-Nitroolefins. A topological rule for C, C-bond forming processes between prochiral centres. Preliminary communication

Dieter Seebach, Jerzy Goliński

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

english

File:

PDF, 515 KB

english, 1981

19

New Irregular Monoterpenes in Artemisia vulgaris

Regula Näf-Müller, Wilhelm Pickenhagen, Bruno Willhalm

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

english

File:

PDF, 394 KB

english, 1981

20

Aufbau der Ligandsysteme des C, D-Tetradehydrocorrins und Isobakteriochlorins durch Sulfidkontraktion. Kurzmitteilung

Silvio Ofner, Vittorio Rasetti, Beat Zehnder, Albert Eschenmoser

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

german

File:

PDF, 792 KB

german, 1981

21

Molecular Structure of the Ethylenediammonium Complex of a Tetracarboxy-macrocyclic Receptor Molecule

John J. Daly, Peter Schönholzer, Jean-Paul Behr, Jean-Marie Lehn

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

english

File:

PDF, 423 KB

english, 1981

22

Cyclometalation of Arylazo Compounds. Part 1 synthesis and cyclopalladation of some substituted 1-arylazonaphthalenes. 1st Communication on compounds with a metal-arene σ-bond

Alfred J. Klaus, Paul Rys

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

english

File:

PDF, 958 KB

english, 1981

23

Doppelt und dreifach funktionalisierte, enantiomerenreine C4-Synthesebausteine aus β-Hydroxybuttersäure, Äpfelsäure und Weinsäure

Ernst Hungerbühler, Dieter Seebach, Daniel Wasmuth

Journal:

Helvetica Chimica Acta

Year:

1981

File:

PDF, 1.37 MB

1981

24

Homologues of p-Menthane Derivatives in Roman Camomile

Alan F. Thomas, Marina Schouwey, Jean-Claude Egger

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

english

File:

PDF, 530 KB

english, 1981

25

Bestimmung der Chiralität optisch aktiver Nickelkomplexe mit porphinoidem Ligandysystem

Kurt Meier, Rolf Scheffold, Peter Engel

Journal:

Helvetica Chimica Acta

Year:

1981

File:

PDF, 503 KB

1981

26

Enantioselektive Reaktionen an porphinoiden Nickelkomplexen

Kurt Meier, Rolf Scheffold

Journal:

Helvetica Chimica Acta

Year:

1981

File:

PDF, 675 KB

1981

27

Kristallstruktur eines Tetrahydro-1(1H)-isoindolons

Roland Prewo, Jost H. Bieri, Ulrich Widmer, Heinz Heimgartner

Journal:

Helvetica Chimica Acta

Year:

1981

File:

PDF, 365 KB

1981

28

Polarographische Untersuchungen an symmetrischen Triazacarbocyaninen in Acetonitril

Journal:

Helvetica Chimica Acta

Year:

1981

File:

PDF, 549 KB

1981

29

Röntgenstrukturanalyse eines neuartigen spirocyclischen Diglycosides, eines Abbauproduktes der Antibiotika Papulacandin A, B and C

Greti Rihs, Peter Traxler

Journal:

Helvetica Chimica Acta

Year:

1981

File:

PDF, 369 KB

1981

30

Structural Modifications of Chaparrinone Using Benzeneseleninic Anhydride. Preliminary communication

Nguyên Khôi, Judith Polonsky

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

english

File:

PDF, 246 KB

english, 1981

31

Etude de la fragmentation par impact électronique en ions positifs et négatifs de dérivés nitrés de l'amino-2-benzothiazole

Saturnin Claude, Raffaele Tabacchi, Laurent Duc, Jean-François Marrel

Journal:

Helvetica Chimica Acta

Year:

1981

File:

PDF, 311 KB

1981

32

Alkyl-, Aryl-, Vinyl-, and Heterosubstituted Organozirconium Compounds. -Selective nucleophiles of low basicity. Preliminary communication

Beat Weidmann, Christopher D. Maycock, Dieter Seebach

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

english

File:

PDF, 288 KB

english, 1981

33

NMR.-spektroskopische Methoden als Reinheitskriterien isomerer Weinsäuren und Weinsäureester

Armin Pfenninger, August Hochrainer

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

german

File:

PDF, 266 KB

german, 1981

34

Notiz zum massenspektrometrischen Zerfall monohalogenierter Essigsäuren und Essigsäureester. 36. Mitteilung über massenspektrometrische Untersuchungen

Annalaura Lorenzi-Riatsch, Norbert Bild, Manfred Hesse

Journal:

Helvetica Chimica Acta

Year:

1981

File:

PDF, 136 KB

1981

35

A New Base-induced Rearrangement of Hexopyranuronic Acid Derivatives with Solvent Participation. Preliminary communication

Joseph Kiss, Wolf Arnold

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

english

File:

PDF, 213 KB

english, 1981

36

Influence of the water content of the solvent on the product distribution in the electrohydrodimerization of 2-cyclohexenones

Paul Tissot, Jean-Paul Surbeck, Fazil O. Gülaçar, Paul Margaretha

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

english

File:

PDF, 274 KB

english, 1981

37

A New, Stereoselective Approach to the [3.3.3]Propellane System: Synthesis of (±)-modhephene. Preliminary communication

Wolfgang Oppolzer, Fabrizio Marazza

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

english

File:

PDF, 212 KB

english, 1981

38

Oxygenation of Co(II) Complexes with Tripodal Ligands

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

english

File:

PDF, 1.08 MB

english, 1981

39

Chemical Selectivities Disguised by Mass Diffusion. VII. A simple model of pH-dependence of product distribution in mixing-disguised azo coupling reactions. 8th Communication on the selectivity of chemical processes

Hasan Belevi, John R. Bourne, Paul Rys

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

english

File:

PDF, 620 KB

english, 1981

40

Chemical Selectivities Disguised by Mass Diffusion. VIII. Influence of pH-gradients on the product distribution in mixing-disguised azo coupling reactions. 9th Communication on the selectivity of chemical processes

Hasan Belevi, John R. Bourne, Paul Rys

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

english

File:

PDF, 473 KB

english, 1981

41

Chemical Selectivities Disguised by Mass Diffusion. IX. A simple model of mixing-disguised reactions in a continuous, stirred tank reactor. 10th Communication on the selectivity of chemical processes

Hasan Belevi, John R. Bourne, Paul Rys

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

english

File:

PDF, 533 KB

english, 1981

42

Chemical Degradation of Lasalocid: (A) The Mannich reaction (B) Baeyer-Villiger oxidation of the retro-aldol ketone

David L. Coffen, David A. Katonak

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

english

File:

PDF, 509 KB

english, 1981

43

Röntgenstrukturanalysen von Chiralen Ionophoren: NH4NCS-Komplex von 9,9′-Spirobifluoren-22-Krone-5

Katarina Neupert-Laves, Max Dobler

Journal:

Helvetica Chimica Acta

Year:

1981

File:

PDF, 526 KB

1981

44

Total synthesis of racemic ajmalicine and 19-epi-ajmalicine

Jürg Gutzwiller, Giacomo Pizzolato, Milan R. Uskoković

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

english

File:

PDF, 619 KB

english, 1981

45

Structure Determination of Brominated Morphinan-6-ones by 13C-NMR. Spectroscopy: A novel closure of the oxygen bridge using 4-acetoxymorphinan-6-ones

Arnold Brossi, Fu-Lian Hsu, Kenner C. Rice, Maria D. Rozwadowska, Helmut Schmidhammer, Charles D. Hufford, Chian Chian Chiang, Isabella L. Karle

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

english

File:

PDF, 612 KB

english, 1981

46

Stereoselective Introduction of Steroid Side Chains at C (17) and C (20)

Andrew D. Batcho, Donald E. Berger, Stephen G. Davoust, Peter M. Wovkulich, Milan R. Uskoković

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

english

File:

PDF, 340 KB

english, 1981

47

Nucleotide. XIV. Substituierte β-Phenyläthyl-Gruppen. Neue Schutzgruppen für Oligonucleotid-Synthesen nach dem Phosphorsäuretriester-Verfahren

Eugen Uhlmann, Wolfgang Pfleiderer

Journal:

Helvetica Chimica Acta

Year:

1981

File:

PDF, 1.03 MB

1981

48

Nucleotide. XV. Synthese und Eigenschaften von 2′-O-t-Butyldimethylsilyl-5′-O-monomethoxytritylribonucleosid-3′-phosphotriestern, Ausgangssubstanzen für Oligonucleotid-Synthesen

Gunter Silber, Dieter Flockerzi, Rajendra Singh Varma, Ramamurthy Charubala, Eugen Uhlmann, Wolfgang Pfleiderer

Journal:

Helvetica Chimica Acta

Year:

1981

File:

PDF, 753 KB

1981

49

Mitteilungen

Journal:

Helvetica Chimica Acta

Year:

1981

Language:

english

File:

PDF, 54 KB

english, 1981

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