Works matching IS 0018019X AND DT 1981 AND VI 64 AND IP 8

Results: 49

High Asymmetric Induction in Conjugate Additions of RCu · BF3 to Chiral Enoates. Preliminary communication.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2808, doi. 10.1002/hlca.19810640842

By:

Oppolzer, Wolfgang;
Löher, Heinz J.

Publication type:

Article

Mechanistic Implications of the Tetrameric Cubic Structure of Lithium Enolates.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2622, doi. 10.1002/hlca.19810640820

By:

Seebach, Dieter;
Amstutz, René;
Dunitz, Jack D.

Publication type:

Article

Dediazoniation of Arenediazonium Ions. Part XIX. Effect of thiocyanate ion in the reactions of 2,4,6-trimethylbenzenediazonium tetrafluoroborate in 2,2,2-trifluoroethanol.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2721, doi. 10.1002/hlca.19810640831

By:

Szele, Ivanka;
Zollinger, Heinrich;
Deshpande, Ashok D.

Publication type:

Article

Enamines. II. A theoretical and photoelectron spectroscopic study of the molecular and electronic structures of aliphatic enamines.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2497, doi. 10.1002/hlca.19810640802

By:

Müller, Klaus;
Previdoli, Felix;
Desilvestro, Hans

Publication type:

Article

Umlagerung von α-Halogen- in α′-Halogen-cyclobutanone, Schlüsselstufe einer variationsreichen Synthese von Pyrethroiden.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2571, doi. 10.1002/hlca.19810640813

By:

Martin, Pierre;
Greuter, Hans;
Winkler, Tammo;
Belluš, Daniel;
Rihs, Grety

Publication type:

Article

13C-NMR. Spectral Differences between Corresponding Methyl Esters, Phenyl Esters and 2-Substituted Chromones.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2654, doi. 10.1002/hlca.19810640824

By:

Séquin, Urs

Publication type:

Article

Contribution à la phytochimie du genre Gentiana. XXVI.. Identification d'une nouvelle di- O-glucosyl cinnamoyl- C-glucosylflavone extraite des feuilles de Gentiana X marcailhouana R Y.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2741, doi. 10.1002/hlca.19810640835

By:

Luong, Minh Duc;
Saeby, Jan;
Fombasso, Pierre;
Jacot-Guillarmod, André

Publication type:

Article

Synthetic Methods and Reactions. Part 106. Suppression of anchimerically assisted rearrangement products in the synthesis of α-fluorocarboxylic acids from α-amino acids with 48:52 (w/w) hydrogen fluoride/pyridine [1].

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2528, doi. 10.1002/hlca.19810640806

By:

Olah, George A.;
Surya Prakash, G. K.;
Chao, Yah Li

Publication type:

Article

Inductive and Polarizability Effects of an Exocyclic Diene-Iron Tricarbonyl Group. The acetolyses of exo- and endo-irontricarbonyl complexes of 5,6-dimethylidene-2- exo-norbornyl and 2,3-dimethylidene-7- anti-norbornyl parabromobenzenesulfonates.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2841, doi. 10.1002/hlca.19810640846

By:

Barras, Charles;
Bell, Larry G.;
Roulet, Raymond;
Vogel, Pierre

Publication type:

Article

Low Temperature Grignard Reactions with Pure Mg Slurries. Trapping of cyclopropylmethyl and benzocyclobutenylmethyl Grignard reagents with CO2.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2606, doi. 10.1002/hlca.19810640817

By:

Künding, Ernst Peter;
Perret, Celia

Publication type:

Article

Action de nucléophiles simples sur un bromoénurononitrile, précurseur et équivalent synthétique partiel d'un ynurononitrile.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2696, doi. 10.1002/hlca.19810640828

By:

Tronchet, Jean M. J.;
Martin, Olivier R.

Publication type:

Article

Synthesis and biological properties of p-azidophenylalanine13-β-melanotropin, a potent photoaffinity label for MSH receptors.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2645, doi. 10.1002/hlca.19810640823

By:

Eberle, Alex N.;
De Graan, Pierre N. E.;
Hübscher, Willy

Publication type:

Article

Die Synthese von 6-substituierten 2-Norbornanolen. Norbornane, 7. Mitteilung.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2709, doi. 10.1002/hlca.19810640830

By:

Grob, Cyril A.;
Günther, Bettina;
Waldner, Adrian

Publication type:

Article

Masthead.

Published in:: Helvetica Chimica Acta, 1981, v. 64, n. 8, p. fmi, doi. 10.1002/hlca.19810640801
Publication type:: Article

Asymmetric induction in Diels- Alder reactions to acrylates derived from chiral sec-alcohols. Preliminary communication.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2802, doi. 10.1002/hlca.19810640841

By:

Oppolzer, Wolfgang;
Kurth, Mark;
Reichlin, Daniel;
Chapuis, Christian;
Mohnhaupt, Martin;
Moffatt, Frank

Publication type:

Article

Synthesis and Diels-Alder Reactivity of 2,3,5,6-Tetramethylidenenorbornane.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2563, doi. 10.1002/hlca.19810640812

By:

Pilet, Olivier;
Vogel, Pierre

Publication type:

Article

The mass spectra of organic compounds. 6th Communication.. The Ring Opening Reaction of Isomeric Cyclanones C8H14O \documentclass{article}\pagestyle{empty}\begin{document}$ 1^{+ \atop \dot{}} $\end{document}.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2782, doi. 10.1002/hlca.19810640839

By:

Gäumann, Tino;
Schwarz, Helmut;
Stahl, Daniel;
Tabet, Jean-Claude

Publication type:

Article

The Radicals and Radical Dianions of Bridged [11]- and [15]Annulenyls as Compared with Those of Benzotropyl and 2,3-Naphthotropyl.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2766, doi. 10.1002/hlca.19810640838

By:

Gerson, Fabian;
Huber, Walter;
Müllen, Klaus

Publication type:

Article

Activated C,H-Acids: N-Alkyl-9-fluorenimines. Preliminary communication.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2524, doi. 10.1002/hlca.19810640805

By:

Bradamante, Silvia;
Colombo, Silvana;
Pagani, Giorgio A.;
Roelens, Stefano

Publication type:

Article

Photodimerization of Solid Pleiadiene; Isomerization and Cycloreversion of the Dimer.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2830, doi. 10.1002/hlca.19810640845

By:

Hazell, Alan C.;
Pagni, Richard M.;
Persy, Gabriele;
Rommel, Erika;
Wirz, Jakob

Publication type:

Article

Photochemical Reactions. 125th communication [1]. Photochemistry of homoconjugated cyclobutanones. I. Synthesis and photolysis of a Spiro [3.6]deca-5, 7-dien-1-one.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2598, doi. 10.1002/hlca.19810640816

By:

Lyle, Terry A.;
Frei, Bruno

Publication type:

Article

Synthese von (−)-(5 R,6 S)-5,6-Epoxy-5,6-dihydro-β-ionon.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2691, doi. 10.1002/hlca.19810640827

By:

Acemoglu, Murat;
Eschenmoser, Walter;
Eugster, Conrad Hans

Publication type:

Article

Crystallographic and Spectroscopic Evidence for an Intramolecular (OH ... π)-Interaction.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2738, doi. 10.1002/hlca.19810640834

By:

Bernd Schweizer, W.;
Dunitz, Jack D.;
Pfund, Rolland A.;
Ramos Tombo, Gerardo M.;
Ganter, Camille

Publication type:

Article

Structure-Activity Relationship of Oxygenated Morphinans. V. Narcotic agonist and antagonist activity in the 14-hydroxymorphinan series. Preliminary communication.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2540, doi. 10.1002/hlca.19810640809

By:

Schmidhammer, Helmut;
Jacobson, Arthur E.;
Atwell, Louise;
Brossi, Arnold

Publication type:

Article

Mitteilungen.

Published in:: Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2861, doi. 10.1002/hlca.19810640849
Publication type:: Article

1H- und 13C-NMR.-Spektroskopie der Nonadride.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2791, doi. 10.1002/hlca.19810640840

By:

Nieminen, Sirkku;
Tamm, Christoph

Publication type:

Article

Tasmanin, ein neues Indolalkaloid aus Aristotelia peduncularis (L ABILL.) H OOK. F. 181. Mitteilung über organische Naturstoffe.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2555, doi. 10.1002/hlca.19810640811

By:

Kyburz, Rolf;
Schöpp, Emanuel;
Bick, I. Ralph C.;
Hesse, Manfred

Publication type:

Article

Methylthiofurane: Herstellung und Reaktionen.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2636, doi. 10.1002/hlca.19810640822

By:

Eugster, Conrad Hans;
Balmer, Markus;
Prewo, Roland;
Bieri, Jost H.

Publication type:

Article

Secondary Deuterium Isotope Effect in an Electrophilic Aromatic Substitution - Protodesilylation of Trimethylphenylsilane.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2733, doi. 10.1002/hlca.19810640833

By:

Szele, Ivanka

Publication type:

Article

Nucleosides and Nucleotides. Part 18. p-nitrobenzenesulfonyl nitroimidazole as a new condensing agent in the triester synthesis of oligonucleotides.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2515, doi. 10.1002/hlca.19810640804

By:

Leach, Colin A.;
Waldmeier, Felix;
Tamm, Christoph

Publication type:

Article

Relationship between Molecular Properties and Conformation of Chiral Alkanes.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2821, doi. 10.1002/hlca.19810640844

By:

Azzena, Ugo;
Luisi, Pier Luigi;
Suter, Ulrich W.;
Gladiali, Serafino

Publication type:

Article

A Convergent Synthesis of (±)-α- and β-Himachalenes.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2592, doi. 10.1002/hlca.19810640815

By:

Oppolzer, Wolfgang;
Snowden, Roger L.

Publication type:

Article

Synthese und Chiralität der enantiomeren 6-Hydroxy-α-ionone sowie von cis- und trans-5,6-Dihydroxy-5,6-dihydro-β-iononen.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2681, doi. 10.1002/hlca.19810640826

By:

Eschenmoser, Walter;
Uebelhart, Peter;
Eugster, Conrad Hans

Publication type:

Article

Nafion-TMS- and TMS-Trifluoroacetate-Induced Rearrangements of Cyclopropyl Ketones - A procedure for the regioselective conversion of semibullvalenes to barrelenes.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2759, doi. 10.1002/hlca.19810640837

By:

Demuth, Martin;
Mikhail, Gamal;
George, Manapurathu V.

Publication type:

Article

The Hydroperoxidation of Olefins by Singlet Oxygen. Validity of the zwitterionic peroxide model.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2534, doi. 10.1002/hlca.19810640808

By:

Jefford, Charles W.

Publication type:

Article

Errata.

Published in:: Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2860, doi. 10.1002/hlca.19810640848
Publication type:: Article

Tetrameric Cubic Structures of Two Solvated Lithium Enolates.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2617, doi. 10.1002/hlca.19810640819

By:

Amstutz, René;
Bernd Schweizer, W.;
Seebach, Dieter;
Dunitz, Jack D.

Publication type:

Article

Crystal structure and electrical conductivity of nickel 6, 13-di ( p-tolyl)-5, 14-dihydrodibenzo [ b, i]-1,4,8,11-tetraaza [14]annulene Iodide (Ni (dtdbtaa)I2.58).

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2544, doi. 10.1002/hlca.19810640810

By:

Hunziker, Max;
Loeliger, Hans;
Rihs, Grety;
Hilti, Bruno

Publication type:

Article

Über Pterinchemie. 79. Mitteilung. 13C-und 15N-NMR.-spektroskopische Untersuchungen an der (6RS)-5, 10-Methylen-5, 6, 7, 8-tetrahydro- L-folsäure; eindeutiger Beweis ihrer Struktur.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2627, doi. 10.1002/hlca.19810640821

By:

Kalbermatten, Roger;
Städeli, Werner;
Bieri, Jost H.;
Viscontini, Max

Publication type:

Article

Dediazoniation of Arenediazonium Ions. Part XX. Secondary deuterium isotope effects in reactions of benzenediazonium tetrafluoroborate.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2728, doi. 10.1002/hlca.19810640832

By:

Szele, Ivanka;
Zollinger, Heinrich

Publication type:

Article

Enamines. III. A theoretical and photoelectron spectroscopic study of the molecular and electronic structures of aziridine enamines.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2508, doi. 10.1002/hlca.19810640803

By:

Müller, Klaus;
Previdoli, Felix

Publication type:

Article

Synthesen von (1 R)- cis-3-(2′,2′-Dihalovinyl)-2, 2-dimethylcyclopropan-carbonsäuren via Favorskii-Umlagerung von optisch aktiven Cyclobutanonen.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2812, doi. 10.1002/hlca.19810640843

By:

Greuter, Hans;
Dingwall, John;
Martin, Pierre;
Belluš, Daniel

Publication type:

Article

Synthesis of L-α-aminoadipyl- L-serinyl- D-valine, a naturally occuring tripeptide from the fermentation of Penicillium chrysogenum.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2587, doi. 10.1002/hlca.19810640814

By:

Shields, James E.;
Campbell, Charles S.;
Scott Doyle, K.;
Miller, Roger D.;
Neuss, Norbert

Publication type:

Article

Kreuzkonjugierte Cyanine und Merocyanine aus Salzen 1-substituierter 2,3-Dimethylchinoxaline. 1. Mitteilung. Über die Isolierung der Farbbasen nach spontaner Umwandlung und nach Oxydation der Reaktanten mit Kupfer(II)acetat oder Silberoxid.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2665, doi. 10.1002/hlca.19810640825

By:

Schelz, Dieter

Publication type:

Article

Trennung und Charakterisierung von β-Carotin-Isomeren.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2746, doi. 10.1002/hlca.19810640836

By:

Vecchi, Max;
Englert, Gerhard;
Maurer, Res;
Meduna, Vladimir

Publication type:

Article

Ru-Catalyzed Oxidation of Acetylenes to α-Diketones with Iodosylbenzene.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2531, doi. 10.1002/hlca.19810640807

By:

Müller, Paul;
Godoy, José

Publication type:

Article

Synthesis and Absolute Configuration of New Trichloro Steroids with Cyclopropane-Containing Side Chains.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2853, doi. 10.1002/hlca.19810640847

By:

Lang, Robert W.;
Djerassi, Carl;
Strong, Phyllis D.;
Swenson, Dale C.;
Duax, William L.

Publication type:

Article

Correct Structure of a Condensation Product C6H12N4O4 from Hydrazine, Formaldehyde and Hydrogen Peroxide.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2614, doi. 10.1002/hlca.19810640818

By:

Whittleton, Stephen N.;
Seiler, Paul;
Dunitz, Jack D.

Publication type:

Article

Enantioselective Generation and Diastereoselective Reactions of Chiral Enolates Derived from α-Heterosubstituted Carboxylic Acids. Preliminary Communication.

Published in:

Helvetica Chimica Acta, 1981, v. 64, n. 8, p. 2704, doi. 10.1002/hlca.19810640829

By:

Seebach, Dieter;
Naef, Reto

Publication type:

Article