Works matching IS 0018019X AND DT 1991 AND VI 74 AND IP 8

Results: 46

A Convenient Synthesis of Vinyl Sulfides.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1931, doi. 10.1002/hlca.19910740830

By:

Katritzky, Alan R.;
Afridi, Amir S.;
Kuzmierkiewicz, Wojciech

Publication type:

Article

Masthead.

Published in:: Helvetica Chimica Acta, 1991, v. 74, n. 8, p. fmi, doi. 10.1002/hlca.19910740801
Publication type:: Article

Characterization of Nitrosocarbonyl Compounds by Neutralization-Reionization Mass Spectrometry.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 2068, doi. 10.1002/hlca.19910740841

By:

O'Bannon, Patrick E.;
Sülzle, Detlev;
Schwarz, Helmut

Publication type:

Article

Dependence of the Regioselectivity of Photo-oxidative Ring Opening of the Chlorophyll Macrocycle on the Complexed Metal Ion.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1713, doi. 10.1002/hlca.19910740812

By:

Iturraspe, José;
Gossauer, Albert

Publication type:

Article

Steric Effects on Reaction Rates. Part XII. Force-Field Calculations for the Solvolysis of Cyclobutyl and Tricyclyl Derivatives.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1808, doi. 10.1002/hlca.19910740823

By:

Müller, Paul;
Milin, Didier

Publication type:

Article

Energy Transfer within Oligonucleotides from a Lumazine (= Pteridine-2,4(1 H,3 H)-dione) Chromophore to Bathophenanthroline-ruthenium(II) Complexes.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1991, doi. 10.1002/hlca.19910740834

By:

Bannwarth, Willi;
Pfleiderer, Wolfgang;
Müller, Francis

Publication type:

Article

Synthesis of Aristotelia-type alkaloids. Part IX. Synthesis of (±)-alloaristoteline.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1643, doi. 10.1002/hlca.19910740805

By:

Güller, Rolf;
Borschberg, Hans-Jürg

Publication type:

Article

Glycosylidene Carbenes. Part 5. Synthesis of Glycono-1,5-lactone Tosylhydrazones as Precursors of Glycosylidene Carbenes.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 2100, doi. 10.1002/hlca.19910740845

By:

Mangholz, Sissi E.;
Vaseha, Andrea

Publication type:

Article

2′-Deoxyisoguanosine and Base-Modified Analogues: Chemical and Photochemical Synthesis.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1742, doi. 10.1002/hlca.19910740816

By:

Kazimierczuk, Zygmunt;
Mertens, Ralf;
Kawczynski, Wieslaw;
Seela, Frank

Publication type:

Article

Helicity Induction in Helicate Self-Organisation from Chiral Tris(bipyridine) Ligand Strands.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1843, doi. 10.1002/hlca.19910740827

By:

Zarges, Wolfgang;
Hall, Jonathan;
Lehn, Jean-Marie;
Bolm, Carsten

Publication type:

Article

Structure Determination of New Iridals from Iris pallida and Iris foetidissima.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 2035, doi. 10.1002/hlca.19910740838

By:

Littek, Andrè;
Marner, Franz-Josef

Publication type:

Article

Metal complexes with macrocyclic ligands. Part XXXIV. Geometrical and conformational changes during the on/off reaction of the side chain in the CuII complex of 11-(3-aminopropyl)-1,4,7,11-tetraazacyclotetradecane.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1689, doi. 10.1002/hlca.19910740809

By:

Schiegg, André;
Riesen, Andreas;
Kaden, Thomas A.

Publication type:

Article

9-(2′-Deoxy-β- D-xylofuranosyl)adenine Building Blocks for Solid-Phase Synthesis and Properties of Oligo(2′-deoxy-xylonucleotides).

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 2054, doi. 10.1002/hlca.19910740840

By:

Roscmeycr, Helmut;
Krečmerova, Marcela;
Seela, Frank

Publication type:

Article

Enzymatic Formation of Raucaffricine, the Major Indole Alkaloid of Rauwolfia serpentina Cell-Suspension Cultures.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1707, doi. 10.1002/hlca.19910740811

By:

Ruyter, Carl Michael;
Stöckigt, Joachim H. H.

Publication type:

Article

New Dolabellane Derivatives from the Brown Alga Dictyota pardalis.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1801, doi. 10.1002/hlca.19910740822

By:

Wright, Anthony D.;
König, Gabriele M.;
Sticher, Otto;
Lubini, Paolo;
Hofmann, Patrick;
Dobler, Max

Publication type:

Article

Thiocyclosporins: Preparation, Solution and Crystal Structure, and Immunosuppressive Activity.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1953, doi. 10.1002/hlca.19910740833

By:

Seebach, Dieter;
Ko, Soo Y.;
Kessler, Horst;
Köck, Matthias;
Reggelin, Michael;
Schmieder, Peter;
Walkinshaw, Malcolm D.;
Bölsterli, J. Jakob;
Bevec, Dorian

Publication type:

Article

Synthesis of Aristotelia-type alkaloids. Part VIII. Synthesis of (±)-aristolasicone.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1636, doi. 10.1002/hlca.19910740804

By:

Güller, Rolf;
Dobler, Markus;
Borschberg, Hans-Jurg

Publication type:

Article

Radical Cations and Radical Anions of Three Bridgehead Azopolycycloalkanes: A Fluid-Solution ESR Study.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 2094, doi. 10.1002/hlca.19910740844

By:

Gescheidt, Georg;
Lamprecht, Axel;
Rüchardt, Christoph;
Schmittel, Michael

Publication type:

Article

Unimolecular Gas-Phase Oxidation of Terminal Hydroxy Groups in [FeO(CH2) nOH]+ Complexes ( n = 2-8). A Case for OH Bond Activation by Late Transition-Metal Ions. Preliminary Communication.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1739, doi. 10.1002/hlca.19910740815

By:

Prüsse, Tilmann;
Schwarz, Helmut

Publication type:

Article

A Molecular-Mechanics Analysis of Complexes of the Sexidentate Macrocycles cis- and trans-6,13-Dimethyl-1,4,8,11-tetraazacyclotetradecane-6,13-diamine.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1834, doi. 10.1002/hlca.19910740826

By:

Bernhardt, Paul V.;
Comba, Peter

Publication type:

Article

Synthesis of N, N-Disubstituted Lactone Hydrazones via (Sulfonylimino)-ethers.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 2024, doi. 10.1002/hlca.19910740837

By:

Fritschi, Stephan;
Vasella, Andrea

Publication type:

Article

Cuprous complexes and dioxygen. Part 11. Concomitant one- and two-electron reduction of O2 by the Cu.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1679, doi. 10.1002/hlca.19910740808

By:

Mi, Li;
Zuberbühler, Andreas D.

Publication type:

Article

New Alkoxypyridine-sulfonamides: Synthesis, Biological Evaluation, and Physicochemical Properties.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1764, doi. 10.1002/hlca.19910740819

By:

Liegéois, Jean-François;
Dive, Georges;
Dupont, Léon;
Delarge, Jacques

Publication type:

Article

Synthesis of New Phospholipids Linked to Steroid-Hormone Derivatives Designed for Two-Dimensional Crystallization of Proteins.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1697, doi. 10.1002/hlca.19910740810

By:

Lebeau, Luc;
Oudet, Pierre;
Mioskowski, Charles

Publication type:

Article

3-Deazaguanine N7- and N9-(2′-Deoxy-β- D-ribofuranosides): Building Blocks for Solid-Phase Synthesis and Incorporation into Oligodeoxyribonucleotides.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1790, doi. 10.1002/hlca.19910740821

By:

Seela, Frank;
Lampe, Sigrid

Publication type:

Article

Stereoselective Hydrolysis of Substituted Cyclopropanedicarboxylates with Pig Liver Esterase.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1941, doi. 10.1002/hlca.19910740832

By:

Walser, Paula;
Renold, Peter;
N'Goka, Victor;
Hosseinzadeh, Fatemeh;
Tamm, Christoph

Publication type:

Article

Preparative Resolution of Heterocyclic Acetals Derived from Glycine, Mercapto-acetic Acid, β-Alanine, and Formyl- or Acetylacetic Acid by Recycling Chromatography on Chiraspher and Temperature Dependence of Separation Factors.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1622, doi. 10.1002/hlca.19910740803

By:

Kinkel, Joachim N.;
Gysel, Urs;
Blaser, Denis;
Seebach, Dieter

Publication type:

Article

Radical Anions of Cyclic Azoalkanes: An ESR, ENDOR, and TRIPLE-Resonance Study.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 2078, doi. 10.1002/hlca.19910740843

By:

Ess, Caspar H.;
Gerson, Fabian;
Adam, Waldemar

Publication type:

Article

Coenzyme F430 from Methanogenic Bacteria: Detection of a Paramagnetic Methylnickel(II) Derivative of the Pentamethyl Ester by 2H-NMR Spectroscopy.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1725, doi. 10.1002/hlca.19910740814

By:

Lin, Shu-Kun;
Jaun, Bernhard

Publication type:

Article

3 J(H,H) Coupling Constants as a Simple Criterion for π Delocalization of Pentafulvenes and Pentafulvalenes.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1823, doi. 10.1002/hlca.19910740825

By:

Neuenschwander, Markus;
Bönzli, Peter

Publication type:

Article

Addition of Carbon Nucleophiles to Tricarbonylchromium Complexes of 1,2-Dihydrocyclobutabenzene, Indane, 1,2,3,4-Tetrahydronaphtbalene and ortho-Xylene.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 2009, doi. 10.1002/hlca.19910740836

By:

Kündig, E. Peter;
Grivet, Chantal;
Wenger, Eric;
Bérnardinelli, Gerald;
Williams, Alan F.

Publication type:

Article

Studies for a Diastereoselective Synthesis of the Tetracyclic Diterpenic Diol Stemarin: A Model Study for a New Preparation of the Key Intermediate and the Synthesis of (+)-18-Deoxystemarin.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1671, doi. 10.1002/hlca.19910740807

By:

Berettoni, Marco;
Bettolo, Rinaldo Marini;
Montanari, Vittorio;
Prencipe, Teresa;
Romeo, Sergio

Publication type:

Article

Isomerès optiques du naftidrofuryl ( = 2-[(naphth-1-yl)méthyl]-3-(tétrahydrofur-2-yl)propanoate de 2-(diéthylamino) éthyle).

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1757, doi. 10.1002/hlca.19910740818

By:

Descours, Denis;
Festal, Didier;
Leger, Jean-Michel;
Carpy, Alain

Publication type:

Article

A Novel Synthesis of tert- Alkyl Sulfides.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1924, doi. 10.1002/hlca.19910740829

By:

Katritzky, Alan R.;
Perumal, Subbu;
Kuzmierkiewicz, Wojciech;
Lue, Ping;
Greenhill, John V.

Publication type:

Article

Stereochemical Studies on Homoterpene Biosynthesis in Higher Plants; Mechanistic, Phylogenetic, and Ecological Aspects.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1773, doi. 10.1002/hlca.19910740820

By:

Gäbler, Andreas;
Boland, Wilhelm;
Preiss, Ute;
Simon, Helmut

Publication type:

Article

Isomerization of N-[α-(Alkylthio)alkyl]- and N-[α-(Arylthio)alkyl]benzotriazoles.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1936, doi. 10.1002/hlca.19910740831

By:

Katritzky, Alan R.;
Kuzmierkiewic, Wojciech;
Perumal, Subbu

Publication type:

Article

Gas-Phase Chemistry of Ti+ to Zn+ with Butyl Isothiocyanate.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1609, doi. 10.1002/hlca.19910740802

By:

Eller, Karsten;
Akkök, Semiha;
Schwarz, Helmut

Publication type:

Article

A Highly Convergent Total Synthesis of (+)-Myxovirescine M2. Preliminary Communication.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 2112, doi. 10.1002/hlca.19910740846

By:

Seebach, Dieter;
Maestro, Miguel A.;
Sefkow, Michael;
Neidlein, Axel;
Sternleld, Francine;
Adam, Geo;
Sommerfeld, Thimo

Publication type:

Article

Metal π-complexes of benzene derivatives. Part. 38. Pentaphenyltriphosphane(5) as a chelating η12-ligand. Unusual formation of an interannular -(PPh)3-bridge at bis(benzene)chromium.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1718, doi. 10.1002/hlca.19910740813

By:

Elschenbroich, Christoph;
Sebbach, Jochen;
Metz, Bernhard

Publication type:

Article

Reaction of the 5-Azoniafulvene Ion with Enamines: A New Approach to Pyrrolizines.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1817, doi. 10.1002/hlca.19910740824

By:

Schärer, Daniel;
Jindra, Vladimir;
Bringhen, Alain O.;
Burger, Ulrich

Publication type:

Article

Energy Transfer from a Lumazine (= Pteridine-2,4(1 H,3 H)-dione) Chromophore to Bathophcnanthroline-ruthenium(II) Complexes during Hybridization Processes of DNA.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 2000, doi. 10.1002/hlca.19910740835

By:

Bamwarth, Willi;
Müller, Francis

Publication type:

Article

From 1-(Silyloxy)Butadiene to 4-Amino-4-Deoxy- DL-Erythrose and to 1-Amino-1-Deoxy- DL-Erythritol Derivatives via Hetero- Diels- Alder Reactions with Acylnitroso Dienophiles.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1653, doi. 10.1002/hlca.19910740806

By:

Defoin, Albert;
Pires, Joaquim;
Streith, Jacques

Publication type:

Article

Convenient Synthesis of 2-Azido-2-deoxy-aldoses by Diazo Transfer.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 2073, doi. 10.1002/hlca.19910740842

By:

Vasella, Andrea;
Witzig, Christian;
Chiara, Jose-Luis;
Martin-Lomas, Manuel

Publication type:

Article

On the Stability of the Schiff Bases of Pyridoxal 5′-Phosphate with Polypeptides Containing L-Lysine.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1749, doi. 10.1002/hlca.19910740817

By:

del Vado, M. Angeles García;
Echevarria, Gerardo R.;
Blanco, Francisco García;
Blanco, José G. Santos;
Vallejo, José Laynez;
de Paz, José L. García

Publication type:

Article

Synthese des Makrolid-Antibiotikums (−)-A26771B mit Photolactonisierung als Schlüsselreaktion und Computersimulation als effektive Optimierungshilfe.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1853, doi. 10.1002/hlca.19910740828

By:

Quinkert, Gerhard;
Küber, Frank;
Knauf, Wolfgang;
Wacker, Manfred;
Koch, Uwe;
Becker, Heinrich;
Nestler, Hans Peter;
Dürner, Gerd;
Zimmermann, Gottfried;
Bats, Jan W.;
Egert, Ernst

Publication type:

Article

Synthesis of a Glucose-Derived Tetrazole as a New β-Glucosidase Inhibitor. A New Synthesis of 1-Deoxynojirimycin.

Published in:

Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 2043, doi. 10.1002/hlca.19910740839

By:

Ermert, Philipp;
Vasella, Andrea

Publication type:

Article