Volume 74; Issue 3

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Helvetica Chimica Acta
Volume 74; Issue 3

Helvetica Chimica Acta

Volume 74; Issue 3

1

Masthead

Journal:

Helvetica Chimica Acta

Year:

1991

File:

PDF, 27 KB

1991

2

Preparation of a Key Intermediate for the Synthesis of the (±)-Pentalenolactone E Methyl Ester by Catalytic ‘Palladium-Ene Cyclization’/Methoxycarbonylation

Wolfgang Oppolzer, Jin-Zhu Xu, Charles Stone

Journal:

Helvetica Chimica Acta

Year:

1991

Language:

english

File:

PDF, 291 KB

english, 1991

3

Synthese von enantiomerenreinem Mimulaxanthin und seiner (9Z,9′Z)- und (15Z)-Isomeren

Andreas Baumeler, Conrad Hans Eugster

Journal:

Helvetica Chimica Acta

Year:

1991

File:

PDF, 1.09 MB

1991

4

On the First Marine Stigmastane Sterols and Sterones Having a 24,25-Double Bond. Isolation from the Sponge Stelletta sp. of Deep Coral Sea

Antonio Guerriero, Cécile Debitus, Francesco Pietra

Journal:

Helvetica Chimica Acta

Year:

1991

Language:

english

File:

PDF, 560 KB

english, 1991

5

Ammodoremin, an Epimeric Mixture of Prenylated Chromandiones from Ammoniacum

Giovanni Appendino, Gian Mario Nano, Davide Viterbo, Giovanni De Munno, Marco Cisero, Giovanni Palmisano, Manuela Aragno

Journal:

Helvetica Chimica Acta

Year:

1991

Language:

english

File:

PDF, 416 KB

english, 1991

6

The 1,3-Dipolar Cycloadditions of Nitrile Oxides and Nitrile Imines to Alkyl Dicyanoacetates

Richard Neidlein, Zhihua Sui

Journal:

Helvetica Chimica Acta

Year:

1991

Language:

english

File:

PDF, 561 KB

english, 1991

7

A New Total Synthesis of D-threo-L-talo-Octose

Denis-Pierre Neff, Yuanwei Chen, Pierre Vogel

Journal:

Helvetica Chimica Acta

Year:

1991

Language:

english

File:

PDF, 621 KB

english, 1991

8

Palladium-Catalyzed Ene-Type Cyclizations of Terpenoid 1,6-Enynes

Andreas Knierzinger, Alfred Grieder, Peter Schönholzer

Journal:

Helvetica Chimica Acta

Year:

1991

Language:

english

File:

PDF, 1.05 MB

english, 1991

9

Transformations in the Isoxazole Series: Synthesis of Substituted 2-Aminothiazoles

Journal:

Helvetica Chimica Acta

Year:

1991

Language:

english

File:

PDF, 790 KB

english, 1991

10

Stereoselective Conversion of Campholene- to Necrodane-Type Monoterpenes. Novel Access to (−)-(R,R)- and (R,S)-α-Necrodol and the Enantiomeric γ-Necrodols

Hervé Pamingle, Roger L. Snowden, Karl H. Schulte-Elte

Journal:

Helvetica Chimica Acta

Year:

1991

Language:

english

File:

PDF, 387 KB

english, 1991

11

Katalytische Carbonylierung von Aceton-oxim an Bisoximato-diruthenium-Komplexen: Ein einfacher Zugang zu wasserfreiem Acetonin. Isolierung und Molekülstruktur von [Ru2(CO)5(Me2CNO)2(Me2CNOH)]

Meinhard Langenbahn, Helen Stoeckli-Evans, Georg Süss-Fink

Journal:

Helvetica Chimica Acta

Year:

1991

Language:

german

File:

PDF, 312 KB

german, 1991

12

Syntheses of Pyrrolo[2,3-d]pyrimidine 2′,3′-Dideoxyribonucleosides Related to 2′,3′-Dideoxyadenosine and 2′,3′-Dideoxyguanosine and Inhibitory Activity of 5′-Triphosphates on HIV-1 Reverse Transcriptase

Frank Seela, Heinz-Peter Muth, Angelika Röling

Journal:

Helvetica Chimica Acta

Year:

1991

Language:

english

File:

PDF, 720 KB

english, 1991

13

Biosynthesis of the Spermine Alkaloid Aphelandrine

Georgios Papazoglou, Jorge Sierra, Katharina Homberger, Armin Guggisberg, Wolf-Dietrich Woggon, Manfred Hesse

Journal:

Helvetica Chimica Acta

Year:

1991

Language:

english

File:

PDF, 331 KB

english, 1991

14

Synthesis and Properties of Sodium and Europium(III) Cryptates Incorporating the 2,2′-Bipyridine 1,1′-Dioxide and 3,3′-Biisoquinoline 2,2′-Dioxide Units

Jean-Marie Lehn, Christine O. Roth

Journal:

Helvetica Chimica Acta

Year:

1991

Language:

english

File:

PDF, 422 KB

english, 1991

15

Synthesis of 1,2,3,4-Tetrahydro-4-oxothieno[3,2-d]pyrimidine and Perhydropyrimidine Derivates from Alkyl Dicyanoacetates

Richard Neidlein, Zhihua Sui

Journal:

Helvetica Chimica Acta

Year:

1991

Language:

english

File:

PDF, 477 KB

english, 1991

16

Glycosylidene Carbenes. Part 3. Synthesis of Spirocyclopropanes

Andrea Vasella, Christian A. A. Waldraff

Journal:

Helvetica Chimica Acta

Year:

1991

Language:

english

File:

PDF, 698 KB

english, 1991

17

Synthesis of Unsubstituted and 4,4′-Substituted Oligobipyridines as Ligand Strands for Helicate Self-Assembly

Margaret M. Harding, Ulrich Koert, Jean-Marie Lehn, Annie Marquis-Rigault, Claude Piguet, Jay Siegel

Journal:

Helvetica Chimica Acta

Year:

1991

Language:

english

File:

PDF, 1.33 MB

english, 1991

18

4H-Chromenone Glycosides from Eranthis hyemalis (L.) SALISBURY

Brigitte Kopp, Erika Kubelka, Christian Reich, Wolfgang Robien, Wolfgang Kubelka

Journal:

Helvetica Chimica Acta

Year:

1991

Language:

english

File:

PDF, 440 KB

english, 1991

19

Lithium-Salt Effects in Peptide Synthesis. Part I. Conditions for the Use of Lithium-Salts in Coupling Reactions

Adrian Thaler, Dieter Seebach, Francis Cardinaux

Journal:

Helvetica Chimica Acta

Year:

1991

Language:

english

File:

PDF, 679 KB

english, 1991

20

Lithium-Salt Effects in Peptide Synthesis. Part II. Improvement of Degree of Resin Swelling and of Efficiency of Coupling in Solid-Phase Synthesis

Adrian Thaler, Dieter Seebach, Francis Cardinaux

Journal:

Helvetica Chimica Acta

Year:

1991

Language:

english

File:

PDF, 1007 KB

english, 1991

21

Effects of Non-planarity in the Radical Anions of Tribenzo[a,c,e]cyclooctenes

Patrick Felder, Fabian Gerson, Georg Gescheidt, René Heckendorn, Tat-Hung Tong, Xiao-Min Wang, Henry N. C. Wong, Xue-Long Hou

Journal:

Helvetica Chimica Acta

Year:

1991

Language:

english

File:

PDF, 448 KB

english, 1991

22

Synthese von N1,4-Di(p-cumaroyl)spermin, einem möglichen Biogenese-Vorläufer von Aphelandrin

Frantisek Veznik, Armin Guggisberg, Manfred Hesse

Journal:

Helvetica Chimica Acta

Year:

1991

File:

PDF, 581 KB

1991

23

On the Methyl-Transfer Reaction in Crystalline Methyl 2-(Methylthio)benzenesulfonate: a Thermally Induced Non-Topochemical Solid-State Reaction

P. Venugopalan, K. Venkatesan, Jörg Klausen, Elisabeth Novotny-Bregger, Christian Leumann, Albert Eschenmoser, Jack D. Dunitz

Journal:

Helvetica Chimica Acta

Year:

1991

Language:

english

File:

PDF, 443 KB

english, 1991

24

Mitteilungen

Journal:

Helvetica Chimica Acta

Year:

1991

File:

PDF, 53 KB

1991

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