Works matching IS 0018019X AND DT 1981 AND VI 64 AND IP 5
Results: 49
Lithiierung in α-Stellung zum N-Atom von Triphenylacetamiden aus cyclischen sekundären Aminen. Umlagerung metallierter Triphenylacetamide unter 1,3-Verschiebung der Carbamoylgruppe.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1337, doi. 10.1002/hlca.19810640510
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Molecular Structure of the Ethylenediammonium Complex of a Tetracarboxy-macrocyclic Receptor Molecule.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1444, doi. 10.1002/hlca.19810640521
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Alkyl-, Aryl-, Vinyl-, and Heterosubstituted Organozirconium Compounds. -Selective nucleophiles of low basicity. Preliminary communication.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1552, doi. 10.1002/hlca.19810640532
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Novel Approach to the Synthesis of 6-Substituted 5,6-Dihydro-2(2 H)-pyranones.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1247, doi. 10.1002/hlca.19810640503
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Röntgenstrukturanalysen von Chiralen Ionophoren: NH<sub>4</sub>NCS-Komplex von 9,9′-Spirobifluoren-22-Krone-5.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1653, doi. 10.1002/hlca.19810640543
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Eine neue Synthese von DL-Armentomycin und verwandten 2-Amino-4-polyhalobuttersäuren.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1379, doi. 10.1002/hlca.19810640514
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Bestimmung der Chiralität optisch aktiver Nickelkomplexe mit porphinoidem Ligandysystem.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1496, doi. 10.1002/hlca.19810640525
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Influence of the water content of the solvent on the product distribution in the electrohydrodimerization of 2-cyclohexenones.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1570, doi. 10.1002/hlca.19810640536
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2-Oxocephems and 2-Acetylpenems - Selective Formation in an Intramolecular Wittig Reaction.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1303, doi. 10.1002/hlca.19810640507
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Nucleotide. XIV. Substituierte β-Phenyläthyl-Gruppen. Neue Schutzgruppen für Oligonucleotid-Synthesen nach dem Phosphorsäuretriester-Verfahren.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1688, doi. 10.1002/hlca.19810640547
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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.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1413, doi. 10.1002/hlca.19810640518
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Röntgenstrukturanalyse eines neuartigen spirocyclischen Diglycosides, eines Abbauproduktes der Antibiotika Papulacandin A, B and C.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1533, doi. 10.1002/hlca.19810640529
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Aufbau der Ligandsysteme des C, D-Tetradehydrocorrins und Isobakteriochlorins durch Sulfidkontraktion. Kurzmitteilung.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1431, doi. 10.1002/hlca.19810640520
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Etude de la fragmentation par impact électronique en ions positifs et négatifs de dérivés nitrés de l'amino-2-benzothiazole.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1545, doi. 10.1002/hlca.19810640531
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Photochemische Reaktionen. 121. Mitteilung. Zur Photochemie von ε,ζ-Methano-α,γ-dienonen und 7,8-Methano-1,3,5-trienen.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1235, doi. 10.1002/hlca.19810640502
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Stereoselective Introduction of Steroid Side Chains at C (17) and C (20).
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1682, doi. 10.1002/hlca.19810640546
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A Dynamic Study of the Stereoisomerization of Pentaphenylethane by Molecular Mechanics Methods.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1372, doi. 10.1002/hlca.19810640513
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Homologues of p-Menthane Derivatives in Roman Camomile.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1488, doi. 10.1002/hlca.19810640524
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A New Base-induced Rearrangement of Hexopyranuronic Acid Derivatives with Solvent Participation. Preliminary communication.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1566, doi. 10.1002/hlca.19810640535
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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.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1298, doi. 10.1002/hlca.19810640506
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Chemical Degradation of Lasalocid: (A) The Mannich reaction (B) Baeyer- Villiger oxidation of the retro-aldol ketone.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1645, doi. 10.1002/hlca.19810640542
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Cyclizations of the C<sub>10</sub> Fatty Acids from the Mandibulary Glands of the Honeybee Apis mellifica L.: Queen substance and royal jelly acid.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1407, doi. 10.1002/hlca.19810640517
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Polarographische Untersuchungen an symmetrischen Triazacarbocyaninen in Acetonitril.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1522, doi. 10.1002/hlca.19810640528
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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.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1599, doi. 10.1002/hlca.19810640539
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Structural Modifications of Chaparrinone Using Benzeneseleninic Anhydride. Preliminary communication.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1540, doi. 10.1002/hlca.19810640530
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Structure Determination of Brominated Morphinan-6-ones by <sup>13</sup>C-NMR. Spectroscopy: A novel closure of the oxygen bridge using 4-acetoxymorphinan-6-ones.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1672, doi. 10.1002/hlca.19810640545
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Masthead.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. fmi, doi. 10.1002/hlca.19810640501
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The Crystal Structure of the Pentaphenylethane/Acetone Solvate by X-Ray Analysis.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1365, doi. 10.1002/hlca.19810640512
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Doppelt und dreifach funktionalisierte, enantiomerenreine C<sub>4</sub>-Synthesebausteine aus β-Hydroxybuttersäure, Äpfelsäure und Weinsäure.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1467, doi. 10.1002/hlca.19810640523
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Notiz zum massenspektrometrischen Zerfall monohalogenierter Essigsäuren und Essigsäureester. 36. Mitteilung über massenspektrometrische Untersuchungen.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1563, doi. 10.1002/hlca.19810640534
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A <sup>13</sup>C-NMR. Study of naphthalene chromium complexes. Correlation with reactivity: Nucleophilic aromatic substitution reactions.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1288, doi. 10.1002/hlca.19810640505
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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.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1630, doi. 10.1002/hlca.19810640541
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Steroids and Sexhormones. Part 265. Limonin, Part VI. Synthesis of a model compound incorporating rings D and E of 14,15-deepoxylimonin.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1398, doi. 10.1002/hlca.19810640516
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Kristallstruktur eines Tetrahydro-1(1 H)-isoindolons.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1515, doi. 10.1002/hlca.19810640527
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Oxygenation of Co(II) Complexes with Tripodal Ligands.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1579, doi. 10.1002/hlca.19810640538
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Von der basenkatalysierten Ringöffnung von 2 H-Azirinen zu einer α-Alkylierungsmethode von primären Aminen.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1322, doi. 10.1002/hlca.19810640509
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Mitteilungen.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1717, doi. 10.1002/hlca.19810640549
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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.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1618, doi. 10.1002/hlca.19810640540
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Multiple Wagner-Meerwein Shift. Biogenesis-like conversion of (±)-Δ<sup>7,8</sup>-Protoilludene to (±)-Hirsutene and related reactions.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1347, doi. 10.1002/hlca.19810640511
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Cyclometalation of Arylazo Compounds. Part 1 synthesis and cyclopalladation of some substituted 1-arylazonaphthalenes. 1st Communication on compounds with a metal-arene σ-bond.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1452, doi. 10.1002/hlca.19810640522
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NMR.-spektroskopische Methoden als Reinheitskriterien isomerer Weinsäuren und Weinsäureester.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1558, doi. 10.1002/hlca.19810640533
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Synthese von diastereo- und enantio-selektiv deuterierten β,ε-, β,β-, β,γ- und γ,γ-Carotinen.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1257, doi. 10.1002/hlca.19810640504
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Total synthesis of racemic ajmalicine and 19- epi-ajmalicine.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1663, doi. 10.1002/hlca.19810640544
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A Stereocontrolled Access to (±)-, (−)-, and (+)-Patchouli Alcohol.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1387, doi. 10.1002/hlca.19810640515
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Enantioselektive Reaktionen an porphinoiden Nickelkomplexen.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1505, doi. 10.1002/hlca.19810640526
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A New, Stereoselective Approach to the [3.3.3]Propellane System: Synthesis of (±)-modhephene. Preliminary communication.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1575, doi. 10.1002/hlca.19810640537
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The Electronic Structure of Phenylene and Naphthylene Bicyclobutanes. Photoelectron spectroscopy and model calculations.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1312, doi. 10.1002/hlca.19810640508
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Nucleotide. XV. Synthese und Eigenschaften von 2′- O- t-Butyldimethylsilyl-5′- O-monomethoxytritylribonucleosid-3′-phosphotriestern, Ausgangssubstanzen für Oligonucleotid-Synthesen.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1704, doi. 10.1002/hlca.19810640548
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New Irregular Monoterpenes in Artemisia vulgaris.
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- Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1424, doi. 10.1002/hlca.19810640519
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