Volume 75; Issue 6

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Helvetica Chimica Acta
Volume 75; Issue 6

Helvetica Chimica Acta

Volume 75; Issue 6

1

Masthead

Journal:

Helvetica Chimica Acta

Year:

1992

File:

PDF, 29 KB

1992

2

Color Chemistry as Reflected in Helvetica Chimica Acta

Heinrich Zollinger

Journal:

Helvetica Chimica Acta

Year:

1992

Language:

english

File:

PDF, 2.22 MB

english, 1992

3

An Enantioselective Approach to the Taxanes: Direct access to functionalized cis-tricyclo[9.3.1.03,8]pentadecanes via α-hydroxy ketone and Wagner-Meerwein rearrangements

Leo A. Paquette, Steven W. Elmore, Keith D. Combrink, Eugene R. Hickey, Robin D. Rogers

Journal:

Helvetica Chimica Acta

Year:

1992

Language:

english

File:

PDF, 999 KB

english, 1992

4

Setting the Bridgehead Oxidation Level in trans-Tricyclo[9.3.1.03,8]pentadecanes as a Prelude to the Dual Synthesis of Taxol and Taxusin

Leo A. Paquette, Keith D. Combrink, Steven W. Elmore, Mangzhu Zhao

Journal:

Helvetica Chimica Acta

Year:

1992

Language:

english

File:

PDF, 1.20 MB

english, 1992

5

Highly Selective Benzylic CH Bond Activation of Toluene 1 by ‘Bare’ FeO+ in the Gas Phase. Short communication

Detlef Schröder, Helena Florencio, Waltraud Zummack, Helmut Schwarz

Journal:

Helvetica Chimica Acta

Year:

1992

Language:

english

File:

PDF, 339 KB

english, 1992

6

Di(tert-butyl)diazomethan: Thermische Zersetzung und Einelektronen-Redox-Reaktionen

Hans Bock, Bodo Berkner, Bernhard Hierholzer, Dieter Jaculi

Journal:

Helvetica Chimica Acta

Year:

1992

File:

PDF, 872 KB

1992

7

Strukturänderungen bei der Reduktion von 9-(Diphenylmethyliden)fluoren mit Natrium-Metall zu Schichten (R2O)Na⊕-verknüpfter Kohlenwasserstoff-Dianionen

Hans Bock, Klaus Ruppert, Eberhardt Herdtweck, Wolfgang A. Herrmann

Journal:

Helvetica Chimica Acta

Year:

1992

File:

PDF, 490 KB

1992

8

Reaktion von 2-Diazopropan mit 1,3-Thiazol-5(4H)-thionen

Grzegorz Mlostoń, Heinz Heimgartner

Journal:

Helvetica Chimica Acta

Year:

1992

File:

PDF, 537 KB

1992

9

Synthese von (±)-Muscopyridin über eine C-ZIP-Ringerweiterungsreaktion

Ferrid Hadj-Abo, Manfred Hesse

Journal:

Helvetica Chimica Acta

Year:

1992

File:

PDF, 406 KB

1992

10

Syntheses of Novel Isopenam and Isocephem Antibiotics. Preparation of a retinamido derivative of a highly strained β-lactam as potent anticancer agent

Gholam H. Hakimelahi, Min-Jen Shiao, Jih Ru Hwu, Hady Davari

Journal:

Helvetica Chimica Acta

Year:

1992

Language:

english

File:

PDF, 499 KB

english, 1992

11

Synthesis, Isolation, and NMR-Spectroscopic Characterization of Fourteen (Z)-Isomers of Lycopene and of Some Acetylenic Didehydro- and Tetradehydrolycopenes

Urs Hengartner, Kurt Bernhard, Karl Meyer, Gerhard Englert, Ernst Glinz

Journal:

Helvetica Chimica Acta

Year:

1992

Language:

english

File:

PDF, 1.15 MB

english, 1992

12

Reaction of Diphenyl Phosphorochloridate with Amide Enolates: A new and convenient synthesis of 2-monosubstituted 3-(n-methyl-n -phenylamino)-2H-azirines

José M. Villalgordo, Heinz Heimgartner

Journal:

Helvetica Chimica Acta

Year:

1992

Language:

english

File:

PDF, 346 KB

english, 1992

13

Carbonyliron Complexation and Carbonyl Insertion of Allenic Ketones

Latchezar S. Trifonov, Alexander S. Orahovats, Anthony Linden, Heinz Heimgartner

Journal:

Helvetica Chimica Acta

Year:

1992

Language:

english

File:

PDF, 463 KB

english, 1992

14

Magnetic Circular Dichroism and Electronic Spectra of Tropothione

Miwako Higashi, Hiroyuki Yamaguchi, Takahisa Machiguchi, Toshio Hasegawa, Harold Baumann

Journal:

Helvetica Chimica Acta

Year:

1992

Language:

english

File:

PDF, 219 KB

english, 1992

15

8-Azaadenine 2′,3′-Dideoxyribonucleosides: Synthesis via 1,2,3- triazolo[4,5-d]pyrimidinyl anions

Frank Seela, Karin Mersmann

Journal:

Helvetica Chimica Acta

Year:

1992

Language:

english

File:

PDF, 708 KB

english, 1992

16

Synthesis and Structure of [4.5.5.5]Fenestranes ( = tetracyclo[5.4.1.04, 12.09, 12]dodecanes)

Daniel Hirschi, Wolfgang Luef, Peter Gerber, Reinhart Keese

Journal:

Helvetica Chimica Acta

Year:

1992

Language:

english

File:

PDF, 774 KB

english, 1992

17

Synthetic Analogues of Naturally Occurring Spider Toxins

Lajos Kovács, Manfred Hesse

Journal:

Helvetica Chimica Acta

Year:

1992

Language:

english

File:

PDF, 1.05 MB

english, 1992

18

Light-Induced Cycloaddition of Furan and addition of methanol to a 4-thiacyclohex-2-enone ( = 2,3-dihydro-4H-thiin-4-one) and a 4-thiacyclopent-2-enone ( = thiophen-3(2H)-one)

Ronald Kowalewski, Paul Margaretha

Journal:

Helvetica Chimica Acta

Year:

1992

Language:

english

File:

PDF, 333 KB

english, 1992

19

Sydnones as Masked Hydrazines for Heterocycle Formation: Reactions of 3-(2-substituted phenyl)sydnones with HCl

Christopher R. Gelvin, Kenneth Turnbull

Journal:

Helvetica Chimica Acta

Year:

1992

Language:

english

File:

PDF, 723 KB

english, 1992

20

Carbocyclic analogs of nucleosides. Part 2.. Synthesis of 2′,3′-dideoxy-5′-homonucleoside analogs

Thomas F. Jenny, Jennifer Horlacher, Nicoletta Previsani, Steven A. Benner

Journal:

Helvetica Chimica Acta

Year:

1992

Language:

english

File:

PDF, 760 KB

english, 1992

21

Electrospray-Ionization Mass Spectrometry: Detection of a radical cation present in solution: New results on the chemistry of (tetrahydropteridinone)-metal complexes

Andrea Schäfer, Berthold Fischer, Henning Paul, René Bosshard, Manfred Hesse, Max Viscontinif

Journal:

Helvetica Chimica Acta

Year:

1992

Language:

english

File:

PDF, 393 KB

english, 1992

22

Asymmetric Synthesis of α-Amino Acids and α-N-Hydroxyamino Acids from N-Acylbornane-10,2-sultams: 1-chloro-1-nitrosocyclohexane as a practical [NH] equivalent

Wolfgang Oppolzer, Osamu Tamura, JöRg Deerberg

Journal:

Helvetica Chimica Acta

Year:

1992

Language:

english

File:

PDF, 1006 KB

english, 1992

23

Glycosylidene Carbenes. Part 9. Regioselective glycosidation of diols and triols: Intra- and intermolecular hydrogen bonds

Peter Uhlmann, Andrea Vasella

Journal:

Helvetica Chimica Acta

Year:

1992

Language:

english

File:

PDF, 1.03 MB

english, 1992

24

Organometallic Derivatives of Cycloproparenes

Paul Müller, Gérald Bernardinelli, Yvan Jacquier

Journal:

Helvetica Chimica Acta

Year:

1992

Language:

english

File:

PDF, 911 KB

english, 1992

25

High-Yield Formation of Arbutin from Hydroquinone by Cell-Suspension Cultures of Rauwolfia serpentina

Ralf Lutterbach, Joachim Stöckigt

Journal:

Helvetica Chimica Acta

Year:

1992

Language:

english

File:

PDF, 226 KB

english, 1992

26

Conformational Studies of Marine Polyhalogenated α-Chamigrenes Using Temperature-Dependent NMR Spectra. Cyclohexene-ring flipping and rigid-chair cyclohexane ring in the presence of equatorial halogen atoms at C(8) and C(9)

Graziano Guella, Giuseppe Chiasera, Francesco Pietra

Journal:

Helvetica Chimica Acta

Year:

1992

Language:

english

File:

PDF, 779 KB

english, 1992

27

Conformational Studies of Marine Polyhalogenated α-Chamigrenes Using Temperature-dependent NMR spectra inverted-chair and twist-boat cyclohexane moieties in the presence of an axial halogen atom at C(8)

Graziano Guella, Giuseppe Chiasera, Francesco Pietra

Journal:

Helvetica Chimica Acta

Year:

1992

Language:

english

File:

PDF, 911 KB

english, 1992

28

Mitteilungen

Journal:

Helvetica Chimica Acta

Year:

1992

Language:

english

File:

PDF, 62 KB

english, 1992

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