Helvetica Chimica Acta: Vol 88, No 6

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Helvetica Chimica Acta

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Helvetica Chimica Acta: Volume 88, Issue 6

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Contents: HCA 6/2005

Rolf Huisgen: A Gentleman Scholar with Energy and Passion

Rolf Huisgen: Some Highlights of His Contributions to Organic Chemistry

Synthesis of the Cyclopentyl Nucleoside (−)-Neplanocin A from D-Glucose via Zirconocene-Mediated Ring Contraction

Use of Tröger's Base as a Scaffold for New Chiral Molecular Tweezers: Synthesis of Trimeric, Fused Tröger's Bases†

Fused 1,2-Dithioles. Part VII: Synthesis and Reactions of 4H-1,2-Dithiolo[4,3-c]isothiazoles

Trifluoromethanesulfonic Acid Catalyzed Alkylation of Arenes with Methyl (2R)-Glycidate

The exo-Outstretching Effect Governing the Exclusive Stereoselectivity of the Intramolecular [2+2] Photocycloaddition of Vinylarenes

The Reactivity of 2-Fluoro- and 2-Chloropyridines toward Sodium Ethoxide: Factors Governing the Rates of Nucleophilic (Het)Aromatic Substitutions

Benzo[a]heptalenes from Heptaleno[1,2-c]furans. Part I: Cycloaddition Reaction of Heptaleno[1,2-c]furans with Different Dienophiles

Photoinduced Electron-Transfer Processes in Fullerene-Based Donor–Acceptor Systems

Control of the Interactions in Multichromophores: Novel Concepts. Perylene Bis-imides as Components for Larger Functional Units

Synthetic Route to Ergot Alkaloids

Catalytic Decomposition of Diazo Compounds as a Method for Generating Carbonyl-Ylide Dipoles

The Effect of Ring Size on Reactivity: The Diagnostic Value of ‘Rate Profiles’

Stereoselective Synthesis of Tetrahydrofuran Spiro-β-Lactams by Ru-Catalyzed Metathesis of 7-Oxabicyclo[2.2.1]heptenes

Cycloadditions of Bifunctional Vinyl Ethers with Electrophilic Alkenes through Tetramethylene Zwitterion Intermediates

Gas-Phase Reactions of Homo- and Heteronuclear Clusters MM′+ (M, M′=Fe, Co, Ni) with Linear Alkanenitriles

The Thermolysis of the Cycloadducts between Aryl Azides and Hexamethyl-Dewar-Benzene Revisited

Reversal of Regioselectivity of Nitrone Cycloadditions by Lewis Acids

A Facile Cell Free Synthesis of Isotopically Labeled (E)-4-Hydroxy-3-methylbut-2-enyl Diphosphate, a Precursor of the Plant Hormone Zeatin

The Chemistry of the Thiosulfinyl Group: Preparation, Structure, and Spectroscopic and Chemical Properties of Cyclic Thionosulfites

New Tryptophan Metabolites from Cultures of the Lipophilic Yeast Malassezia furfur

Vicinal Diamination of Terminal Olefins

Cycloadditions of Aryl-Substituted 1,2,4-Triazines with 2-Cyclopropylidene-1,3-dimethylimidazolidine – Zwitterions as Discrete Intermediates

Tropone Is a Mere Ketone for Cycloadditions to Ketenes

Thermal Isomerization of 12-Oxa-1,9-dimetylhexacyclo[7.2.1.02,4.02,8.03,7.06,8]dodec-10-ene: A Computational Mechanistic Investigation

The Relationship of Cycloaddition Reactions to Spontaneous Vinyl Polymerizations

Toward a Total Synthesis of Macrocyclic Jatrophane Diterpenes – Concise Route to a Highly Functionalized Cyclopentane Key Intermediate

[2+2] Cycloaddition Reactions of Imines with Cyclic Ketenes: Synthesis of 1,3-Thiazolidine Derived Spiro-β-lactams and Their Transformations

Exploring the Border between Concerted and Two-Step Pathways of 1,3-Dipolar Cycloadditions of Organic Azides to Cyclic Ketene N,X-Acetals. – Synthesis and 15N-NMR Spectra of Zwitterions and Spirocyclic Cycloadducts†

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Use of Tröger's Base as a Scaffold for New Chiral Molecular Tweezers: Synthesis of Trimeric, Fused Tröger's Bases ^†

Gas-Phase Reactions of Homo- and Heteronuclear Clusters MM′⁺ (M, M′=Fe, Co, Ni) with Linear Alkanenitriles

Thermal Isomerization of 12-Oxa-1,9-dimetylhexacyclo[7.2.1.0^2,4.0^2,8.0^3,7.0^6,8]dodec-10-ene: A Computational Mechanistic Investigation

Exploring the Border between Concerted and Two-Step Pathways of 1,3-Dipolar Cycloadditions of Organic Azides to Cyclic Ketene N,X-Acetals. – Synthesis and ¹⁵N-NMR Spectra of Zwitterions and Spirocyclic Cycloadducts ^†