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.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1337, doi. 10.1002/hlca.19810640510

By:

Wykypiel, Werner;
Lohmann, Jean-Jaques;
Seebach, Dieter

Publication type:

Article

Molecular Structure of the Ethylenediammonium Complex of a Tetracarboxy-macrocyclic Receptor Molecule.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1444, doi. 10.1002/hlca.19810640521

By:

Daly, John J.;
Schönholzer, Peter;
Behr, Jean-Paul;
Lehn, Jean-Marie

Publication type:

Article

Alkyl-, Aryl-, Vinyl-, and Heterosubstituted Organozirconium Compounds. -Selective nucleophiles of low basicity. Preliminary communication.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1552, doi. 10.1002/hlca.19810640532

By:

Weidmann, Beat;
Maycock, Christopher D.;
Seebach, Dieter

Publication type:

Article

Novel Approach to the Synthesis of 6-Substituted 5,6-Dihydro-2(2 H)-pyranones.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1247, doi. 10.1002/hlca.19810640503

By:

Fehr, Charles;
Galindo, José;
Ohloff, Günther

Publication type:

Article

Röntgenstrukturanalysen von Chiralen Ionophoren: NH4NCS-Komplex von 9,9′-Spirobifluoren-22-Krone-5.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1653, doi. 10.1002/hlca.19810640543

By:

Neupert-Laves, Katarina;
Dobler, Max

Publication type:

Article

Eine neue Synthese von DL-Armentomycin und verwandten 2-Amino-4-polyhalobuttersäuren.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1379, doi. 10.1002/hlca.19810640514

By:

Heinzer, Franz;
Martin, Pierre

Publication type:

Article

Bestimmung der Chiralität optisch aktiver Nickelkomplexe mit porphinoidem Ligandysystem.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1496, doi. 10.1002/hlca.19810640525

By:

Meier, Kurt;
Scheffold, Rolf;
Engel, Peter

Publication type:

Article

Influence of the water content of the solvent on the product distribution in the electrohydrodimerization of 2-cyclohexenones.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1570, doi. 10.1002/hlca.19810640536

By:

Tissot, Paul;
Surbeck, Jean-Paul;
Gülaçar, Fazil O.;
Margaretha, Paul

Publication type:

Article

2-Oxocephems and 2-Acetylpenems - Selective Formation in an Intramolecular Wittig Reaction.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1303, doi. 10.1002/hlca.19810640507

By:

Ernest, Ivan;
Main, Alan J.;
Woodward, Robert B.

Publication type:

Article

Nucleotide. XIV. Substituierte β-Phenyläthyl-Gruppen. Neue Schutzgruppen für Oligonucleotid-Synthesen nach dem Phosphorsäuretriester-Verfahren.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1688, doi. 10.1002/hlca.19810640547

By:

Uhlmann, Eugen;
Pfleiderer, Wolfgang

Publication type:

Article

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.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1413, doi. 10.1002/hlca.19810640518

By:

Seebach, Dieter;
Goliński, Jerzy

Publication type:

Article

Röntgenstrukturanalyse eines neuartigen spirocyclischen Diglycosides, eines Abbauproduktes der Antibiotika Papulacandin A, B and C.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1533, doi. 10.1002/hlca.19810640529

By:

Rihs, Greti;
Traxler, Peter

Publication type:

Article

Aufbau der Ligandsysteme des C, D-Tetradehydrocorrins und Isobakteriochlorins durch Sulfidkontraktion. Kurzmitteilung.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1431, doi. 10.1002/hlca.19810640520

By:

Ofner, Silvio;
Rasetti, Vittorio;
Zehnder, Beat;
Eschenmoser, Albert

Publication type:

Article

Etude de la fragmentation par impact électronique en ions positifs et négatifs de dérivés nitrés de l'amino-2-benzothiazole.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1545, doi. 10.1002/hlca.19810640531

By:

Claude, Saturnin;
Tabacchi, Raffaele;
Duc, Laurent;
Marrel, Jean-François

Publication type:

Article

Photochemische Reaktionen. 121. Mitteilung. Zur Photochemie von ε,ζ-Methano-α,γ-dienonen und 7,8-Methano-1,3,5-trienen.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1235, doi. 10.1002/hlca.19810640502

By:

Ishii, Keitaro;
Frei, Bruno;
Wolf, Hans Richard;
Jeger, Oskar

Publication type:

Article

Stereoselective Introduction of Steroid Side Chains at C (17) and C (20).

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1682, doi. 10.1002/hlca.19810640546

By:

Batcho, Andrew D.;
Berger, Donald E.;
Davoust, Stephen G.;
Wovkulich, Peter M.;
Uskoković, Milan R.

Publication type:

Article

A Dynamic Study of the Stereoisomerization of Pentaphenylethane by Molecular Mechanics Methods.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1372, doi. 10.1002/hlca.19810640513

By:

Bernardinelli, Gerald;
Gerdil, Raymond

Publication type:

Article

Homologues of p-Menthane Derivatives in Roman Camomile.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1488, doi. 10.1002/hlca.19810640524

By:

Thomas, Alan F.;
Schouwey, Marina;
Egger, Jean-Claude

Publication type:

Article

A New Base-induced Rearrangement of Hexopyranuronic Acid Derivatives with Solvent Participation. Preliminary communication.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1566, doi. 10.1002/hlca.19810640535

By:

Kiss, Joseph;
Arnold, Wolf

Publication type:

Article

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.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1298, doi. 10.1002/hlca.19810640506

By:

Jacobson, Arthur E.;
Hsu, Fu-Lian;
Rozwadowska, Maria D.;
Schmidhammer, Helmut;
Atwell, Louise;
Brossi, Arnold;
Medzihradsky, Fedor

Publication type:

Article

Chemical Degradation of Lasalocid: (A) The Mannich reaction (B) Baeyer- Villiger oxidation of the retro-aldol ketone.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1645, doi. 10.1002/hlca.19810640542

By:

Coffen, David L.;
Katonak, David A.

Publication type:

Article

Cyclizations of the C10 Fatty Acids from the Mandibulary Glands of the Honeybee Apis mellifica L.: Queen substance and royal jelly acid.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1407, doi. 10.1002/hlca.19810640517

By:

Barbier, Michel

Publication type:

Article

Polarographische Untersuchungen an symmetrischen Triazacarbocyaninen in Acetonitril.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1522, doi. 10.1002/hlca.19810640528

By:

Hellrung, Bruno

Publication type:

Article

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.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1599, doi. 10.1002/hlca.19810640539

By:

Belevi, Hasan;
Bourne, John R.;
Rys, Paul

Publication type:

Article

Structural Modifications of Chaparrinone Using Benzeneseleninic Anhydride. Preliminary communication.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1540, doi. 10.1002/hlca.19810640530

By:

Khôi, Nguyên;
Polonsky, Judith

Publication type:

Article

Structure Determination of Brominated Morphinan-6-ones by 13C-NMR. Spectroscopy: A novel closure of the oxygen bridge using 4-acetoxymorphinan-6-ones.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1672, doi. 10.1002/hlca.19810640545

By:

Brossi, Arnold;
Hsu, Fu-Lian;
Rice, Kenner C.;
Rozwadowska, Maria D.;
Schmidhammer, Helmut;
Hufford, Charles D.;
Chiang, Chian Chian;
Karle, Isabella L.

Publication type:

Article

Masthead.

Published in:: Helvetica Chimica Acta, 1981, v. 64, n. 5, p. fmi, doi. 10.1002/hlca.19810640501
Publication type:: Article

The Crystal Structure of the Pentaphenylethane/Acetone Solvate by X-Ray Analysis.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1365, doi. 10.1002/hlca.19810640512

By:

Bernardinelli, Gerald;
Gerdil, Raymond

Publication type:

Article

Doppelt und dreifach funktionalisierte, enantiomerenreine C4-Synthesebausteine aus β-Hydroxybuttersäure, Äpfelsäure und Weinsäure.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1467, doi. 10.1002/hlca.19810640523

By:

Hungerbühler, Ernst;
Seebach, Dieter;
Wasmuth, Daniel

Publication type:

Article

Notiz zum massenspektrometrischen Zerfall monohalogenierter Essigsäuren und Essigsäureester. 36. Mitteilung über massenspektrometrische Untersuchungen.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1563, doi. 10.1002/hlca.19810640534

By:

Lorenzi-Riatsch, Annalaura;
Bild, Norbert;
Hesse, Manfred

Publication type:

Article

A 13C-NMR. Study of naphthalene chromium complexes. Correlation with reactivity: Nucleophilic aromatic substitution reactions.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1288, doi. 10.1002/hlca.19810640505

By:

Desobry, Vincent;
Kündig, Ernst Peter

Publication type:

Article

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.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1630, doi. 10.1002/hlca.19810640541

By:

Belevi, Hasan;
Bourne, John R.;
Rys, Paul

Publication type:

Article

Steroids and Sexhormones. Part 265. Limonin, Part VI. Synthesis of a model compound incorporating rings D and E of 14,15-deepoxylimonin.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1398, doi. 10.1002/hlca.19810640516

By:

Emmer, Gerhard;
Graf, Walter

Publication type:

Article

Kristallstruktur eines Tetrahydro-1(1 H)-isoindolons.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1515, doi. 10.1002/hlca.19810640527

By:

Prewo, Roland;
Bieri, Jost H.;
Widmer, Ulrich;
Heimgartner, Heinz

Publication type:

Article

Oxygenation of Co(II) Complexes with Tripodal Ligands.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1579, doi. 10.1002/hlca.19810640538

By:

Mäcke, Helmut

Publication type:

Article

Von der basenkatalysierten Ringöffnung von 2 H-Azirinen zu einer α-Alkylierungsmethode von primären Aminen.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1322, doi. 10.1002/hlca.19810640509

By:

Schulthess, Adrian Heinz;
Hansen, Hans-Jürgen

Publication type:

Article

Mitteilungen.

Published in:: Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1717, doi. 10.1002/hlca.19810640549
Publication type:: Article

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.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1618, doi. 10.1002/hlca.19810640540

By:

Belevi, Hasan;
Bourne, John R.;
Rys, Paul

Publication type:

Article

Multiple Wagner-Meerwein Shift. Biogenesis-like conversion of (±)-Δ7,8-Protoilludene to (±)-Hirsutene and related reactions.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1347, doi. 10.1002/hlca.19810640511

By:

Hayano, Kiyoharu;
Ohfune, Yasufumi;
Shirahama, Haruhisa;
Matsumoto, Takeshi

Publication type:

Article

Cyclometalation of Arylazo Compounds. Part 1 synthesis and cyclopalladation of some substituted 1-arylazonaphthalenes. 1st Communication on compounds with a metal-arene σ-bond.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1452, doi. 10.1002/hlca.19810640522

By:

Klaus, Alfred J.;
Rys, Paul

Publication type:

Article

NMR.-spektroskopische Methoden als Reinheitskriterien isomerer Weinsäuren und Weinsäureester.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1558, doi. 10.1002/hlca.19810640533

By:

Pfenninger, Armin;
Hochrainer, August

Publication type:

Article

Synthese von diastereo- und enantio-selektiv deuterierten β,ε-, β,β-, β,γ- und γ,γ-Carotinen.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1257, doi. 10.1002/hlca.19810640504

By:

Märki, Hans Peter;
Eugster, Conrad Hans

Publication type:

Article

Total synthesis of racemic ajmalicine and 19- epi-ajmalicine.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1663, doi. 10.1002/hlca.19810640544

By:

Gutzwiller, Jürg;
Pizzolato, Giacomo;
Uskoković, Milan R.

Publication type:

Article

A Stereocontrolled Access to (±)-, (−)-, and (+)-Patchouli Alcohol.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1387, doi. 10.1002/hlca.19810640515

By:

Näf, Ferdinand;
Decorzant, René;
Giersch, Wolfgang;
Ohloff, Günther

Publication type:

Article

Enantioselektive Reaktionen an porphinoiden Nickelkomplexen.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1505, doi. 10.1002/hlca.19810640526

By:

Meier, Kurt;
Scheffold, Rolf

Publication type:

Article

A New, Stereoselective Approach to the [3.3.3]Propellane System: Synthesis of (±)-modhephene. Preliminary communication.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1575, doi. 10.1002/hlca.19810640537

By:

Oppolzer, Wolfgang;
Marazza, Fabrizio

Publication type:

Article

The Electronic Structure of Phenylene and Naphthylene Bicyclobutanes. Photoelectron spectroscopy and model calculations.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1312, doi. 10.1002/hlca.19810640508

By:

Gleiter, Rolf;
Gubernator, Klaus;
Eckert-Maksić, Mirjana;
Spanget-Larsen, Jens;
Bianco, Bernard;
Gandillon, Gérard;
Burger, Ulrich

Publication type:

Article

Nucleotide. XV. Synthese und Eigenschaften von 2′- O- t-Butyldimethylsilyl-5′- O-monomethoxytritylribonucleosid-3′-phosphotriestern, Ausgangssubstanzen für Oligonucleotid-Synthesen.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1704, doi. 10.1002/hlca.19810640548

By:

Silber, Gunter;
Flockerzi, Dieter;
Varma, Rajendra Singh;
Charubala, Ramamurthy;
Uhlmann, Eugen;
Pfleiderer, Wolfgang

Publication type:

Article

New Irregular Monoterpenes in Artemisia vulgaris.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 5, p. 1424, doi. 10.1002/hlca.19810640519

By:

Näf-Müller, Regula;
Pickenhagen, Wilhelm;
Willhalm, Bruno

Publication type:

Article