Works matching IS 0018019X AND DT 1973 AND VI 56 AND IP 5
Results: 48
The ring contraction of cyclic trimethylsilyl enol ethers with arenesulfonyl azides. Ring expansion and ring contraction reactions by means of diazonium betaines. III [1]. Preliminary communication.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1826, doi. 10.1002/hlca.19730560547
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Synthese und Eigenschaften einiger neuer Mono(π-cyclopentadienyl)-Nickel-Komplexe.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1620, doi. 10.1002/hlca.19730560518
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Über Pterinchemie. 42. Mitteilung [1]. Synthese von 6-Hydroxymethyl-mono-, di- und triphosphat sowie deren 7, 8-Dihydroderivate.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1710, doi. 10.1002/hlca.19730560529
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Intermediaires organiques du germanium divalent: III obtention de germylenes γ-hydroxyles à partir de 3-chlorohydrogermyl-1-propanols et de 3-methoxyhydrogermyl-1-propanols.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1638, doi. 10.1002/hlca.19730560520
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Nuclear Quadrupole Resonance and Stereochemistry II. Vicinal cis- and trans-dichloro derivatives of carbocyclic systems.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1720, doi. 10.1002/hlca.19730560531
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Thermische Umlagerungen von halogensubstituierten Aryl-propargyläthern.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1457, doi. 10.1002/hlca.19730560502
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Utilisation d'ylides du phosphore en chimie des sucres. XVIII Synthèse de furannoses à insaturation conjuguée. Communication préliminaire.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1802, doi. 10.1002/hlca.19730560542
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Etude conformationnelle dans l'approximation CNDO/BW: barrière de rotation interne de petites molécules organiques.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1565, doi. 10.1002/hlca.19730560513
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Untersuchungen über eine Carbonyl-Olefinierung mit α-metallierten Isocyaniden. Die Synthese von β-Carotin und anderen Polyenen.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1671, doi. 10.1002/hlca.19730560524
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Über den Einfluss nichtpolarer Lösungsmittel auf Lage und Intensität von Absorptionsbanden in den Elektronenspektren apolarer Molekeln: II. Polyacetylene.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1752, doi. 10.1002/hlca.19730560535
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Reinvestigation of the Classical Synthesis of Cinchona Alkaloids. II. The synthesis of quinine and its naturally occurring diastereomers from quinotoxine.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1494, doi. 10.1002/hlca.19730560506
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Über Pterinchemie. 43. Mitteilung [1]. Synthese von D-Neopterin-3′-phosphat und D-Neopterin-2′, 3′-cyclophosphat. Betrachtungen über die Biopterin-Biogenese.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1819, doi. 10.1002/hlca.19730560546
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'Lone pair' Electronic Structure, Conformation and Oxidation Behaviour of Diaziridines.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1614, doi. 10.1002/hlca.19730560517
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Synthese von 1α-Hydroxycholecalciferol. Vorläufige Mitteilung.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1708, doi. 10.1002/hlca.19730560528
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Über das 2-Nitrothiophen.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1787, doi. 10.1002/hlca.19730560539
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Nuclear Quadrupole Resonance and Stereochemistry I. α - Chloro ethers.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1715, doi. 10.1002/hlca.19730560530
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Masthead.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. fmi, doi. 10.1002/hlca.19730560501
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1, 4-Dimethylcyclohex-3-enyl Methyl Ketone, a monoterpenoid with a novel skeleton.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1800, doi. 10.1002/hlca.19730560541
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C(8) Epimeric 8-Hydroxy-erythromycins-B.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1557, doi. 10.1002/hlca.19730560512
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Die Synthese von all- trans-Retinylamin und anderen Polyenaminen.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1662, doi. 10.1002/hlca.19730560523
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Photochemical α-Cleavage of β, γ-Unsaturated Aryl Ketones: Competition between recombination/disproportionation and dissociation in geminate singlet and triplet radical pairs.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1741, doi. 10.1002/hlca.19730560534
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Reinvestigation of the Classical Synthesis of Cinchona Alkaloids. I. A new synthesis of homomeroquinene and quinotoxine.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1485, doi. 10.1002/hlca.19730560505
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Bildung von 2-(1-Methyl-1, 4, 5, 6-tetrahydropyridyl-3)-2-oxazolin-4-on aus 1-Methyl-1, 4, 5, 6-tetrahydronicotinsäureamid und Bromessigsäureäthylester und seine Überführung in O-(1-Methylnipecotinoyl)glykolsäureamid via das dazu tautomere Cyclol
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1815, doi. 10.1002/hlca.19730560545
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Contribution à l'étude de dérivés O-β-hydroxyéthylés de la quercétine. Identification des dérivés par spectrophotométrie UV.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1604, doi. 10.1002/hlca.19730560516
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Komplexone XLVI. EDTA-Komplexe des Pt(II)-Ions mit und ohne einzähnige Fremdliganden.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1698, doi. 10.1002/hlca.19730560527
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Darstellung von neutralen, lipophilen Liganden für Membranelektroden mit Selektivität für Erdalkali-Ionen.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1780, doi. 10.1002/hlca.19730560538
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Homopolar- and Heteropolar Bond Dissociation Energies and Heats of Formation of Radicals and Ions in the Gas Phase. I. Data on organic molecules.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1516, doi. 10.1002/hlca.19730560509
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Versuche zur Synthese der 4-Thio- D-glucose.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1792, doi. 10.1002/hlca.19730560540
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Spectre de Resonance Paramagnétique Electronique de la Diphénylthiophosphine cristalline irradiée aux rayons X.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1552, doi. 10.1002/hlca.19730560511
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N-Carbobenzoxy- L-pyroglutamyl- L-histidyl Peptides.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1656, doi. 10.1002/hlca.19730560522
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Repetitive Excess Mixed Anhydride (REMA) Synthesis of Peptides. The protected C-terminal hexadecapeptide of secretin.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1729, doi. 10.1002/hlca.19730560533
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Chlorosulfates d'alkyle.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1483, doi. 10.1002/hlca.19730560504
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The Total Synthesis of (±) β-Acorenol. Preliminary communication.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1812, doi. 10.1002/hlca.19730560544
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The Interaction of Walsh-Orbitols in Diademane and Related Hydrocarbons.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1594, doi. 10.1002/hlca.19730560515
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Thermische Zerfallsreaktionen von Nitroverbindungen in Stosswellen. III: Dissoziation von 1-Nitropropan und 2-Nitropropan.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1691, doi. 10.1002/hlca.19730560526
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Über die Cyclialkylierung von Dimethylarylhexanolen. Vorläufige Mitteilung.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1775, doi. 10.1002/hlca.19730560537
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The Synthesis of Damascenone and β-Damascone and the possible mechanism of their formation from carotenoids.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1514, doi. 10.1002/hlca.19730560508
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Mitteilungen - Communications.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1828, doi. 10.1002/hlca.19730560548
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Metallbindungsphänomene: Alkoholat-Aggregate als unmittelbare Teilnehmer an Eliminierungsreaktionen.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1630, doi. 10.1002/hlca.19730560519
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Homopolar and Heteropolar Bond Dissociation Energies and Heats of Formation of Radicals and Ions in the Gas Phase II. The relationship between structure and bond dissociation in organic molecules.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1537, doi. 10.1002/hlca.19730560510
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A Novel Synthesis of 1-Aryl-9-alkyl-2, 3, 3a, 4, 9, 9a-hexahydro-1H-pyrrolo[2, 3-b] quinoxalines by lithium aluminium hydride reduction of N-phenyl-1-benzimidazolyl-succinimides.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1646, doi. 10.1002/hlca.19730560521
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Nuclear Quadrupole Resonance and Stereochemistry III. Trichloromethyl derivatives.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1724, doi. 10.1002/hlca.19730560532
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The Preparation of Merrifield-Resins Through Total Esterification With Cesium Salts.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1476, doi. 10.1002/hlca.19730560503
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Elektronenspinresonanz freier Radikale bei photochemischen Reaktionen von Ketonen in Lösung.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1575, doi. 10.1002/hlca.19730560514
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Tieftemperaturbestrahlungen von 3-Phenyl-2 H-azirinen.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1679, doi. 10.1002/hlca.19730560525
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Intramolecular Diels-Alder reactions: Construction of aza- and diaza-steroid type skeletons.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1763, doi. 10.1002/hlca.19730560536
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Modellreaktionen zur Biosynthese von Verbindungen der Damascon-Reihe und ihre präparative Anwendung.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1503, doi. 10.1002/hlca.19730560507
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A New Stereoselective Approach to Substituted Pyrrolidines by Intramolecular Ene-Reactions. Preliminary communication.
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- Helvetica Chimica Acta, 1973, v. 56, n. 5, p. 1807, doi. 10.1002/hlca.19730560543
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