Works in Helvetica Chimica Acta, 1992, Vol 75, Issue 4

Results: 36

Complexes of Rhodium(III) with Two Chelating C⁁N Ligands and One Diimine Ligand.

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1320, doi. 10.1002/hlca.19920750434

By:

Maeder, Urs;
Von Zelewsky, Alex;
Stoeckli-Evans, Helen

Publication type:

Article

Efficient Synthesis of Enantiomerically Pure α-Ionone from ( R)- and ( S)-α-Damascone.

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1023, doi. 10.1002/hlca.19920750405

By:

Fehr, Charles;
Guntern, Olivier

Publication type:

Article

Base Hydrolysis of Pentaaminecobalt(III) Complexes: The [CoX(dien) (dapo)] n+ system. Part 1. Syntheses, structures, configuration, and spectroscopy.

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1130, doi. 10.1002/hlca.19920750416

By:

Comba, Peter;
House, Donald A.;
Jackson, W. Gregory;
Marty, Werner;
Stoeckli-Evans, Helen;
Zipper, Luc

Publication type:

Article

Nucleosides. Part L.. Structure of lumazine N1-(2′-deoxy- D-ribonucleosides) ( = 1-(2′-deoxy- D-ribofuranosyl)pteridine-2,4(1 H,3 H)-diones): A revision of the anomeric configuration.

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1267, doi. 10.1002/hlca.19920750427

By:

Cao, Xiaodong;
Pfleiderer, Wolfgang;
Rosemeyer, Helmut;
Seela, Frank;
Bannwarth, Willi;
Schönholzer, Peter

Publication type:

Article

Synthesis of Coumarins and Derivatives. Part 1. Biomimetic synthesis of esculetin and halogenated derivatives.

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1061, doi. 10.1002/hlca.19920750409

By:

Borges, Fernanda;
Pinto, Madalena

Publication type:

Article

A New Synthesis of Coprine and O-Ethylcoprine.

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1078, doi. 10.1002/hlca.19920750411

By:

Kienzler, Thomas;
Strazewski, Peter;
Tamm, Christoph

Publication type:

Article

Synthesis and Properties of Macrobicyclic Cryptates Incorporating Five- and Six-Membered Biheteroaryl Units.

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1221, doi. 10.1002/hlca.19920750422

By:

Lehn, Jean-Marie;
De Vains, Jean-Bernard Regnouf

Publication type:

Article

Synthesis and X-Ray Structural Studies of '4,7,13-Trioxa-1,10-diaza-5,6-benzocyclopentadecane-2,9-dione' ( = 5,6,9,10-Tetrahydro-2 H, 8 H-benzo[ b][1,4,10]trioxa[7,13]diazacyclopentadecene-311(4 H,12 H)-dione) and '4,7,13,16-Tetraoxa-1,10-diaza-5,6-benzocyclooctadecane-2,9-dione' ( = 5,6,8,9,12,13-Hexahydro-2 H,11 H-benzo[b][1,4,10,13]tetraoxa- [7,16]diazacyclooctadecene-3,14(4 H, 15 H)-dione)

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1313, doi. 10.1002/hlca.19920750433

By:

Gluziński, Przemyslaw;
Jurczak, Janusz;
Krajewski, Janusz W.;
Sałański, Piotr;
Stankiewicz, Tomasz;
Urbańczyk-Lipkowska, Zofia;
Armbruster, Thomas;
Bürgi, Hans-Beat

Publication type:

Article

Trialkyltin Compounds as Neutral Carriers for Anions in PVC Liquid Membranes and Complex Formation with Oxoanions.

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1012, doi. 10.1002/hlca.19920750404

By:

Fluri, Karl;
Koudelka, Juraj;
Simon, Wilhelm

Publication type:

Article

Photolytic Reactions of ( o-Allylbenzyl)dicarbonyl(η5-cyclopentadienyl)iron.

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1123, doi. 10.1002/hlca.19920750415

By:

Thoma, Gebhard;
Giese, Bernd

Publication type:

Article

Cycloaddition of Carbodiimides with a Heteroaromatic Substituent to Allenic Acids.

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1262, doi. 10.1002/hlca.19920750426

By:

Trifonov, Latchezar S.;
Christova, Nadja I.;
Dimitrov, Valentin S.;
Orahovats, Alexander S.

Publication type:

Article

1,7-Dideaza-2′-deoxyadenosine: Building blocks for solid-phase synthesis and secondary structure of base-modified oligodeoxyribonucleotides.

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1111, doi. 10.1002/hlca.19920750414

By:

Seela, Frank;
Wenzel, Thomas

Publication type:

Article

Catalytic One-Pot Osmylation of Cyclohexadienes: Stereochemical and conformational studies of the resulting polyols.

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1052, doi. 10.1002/hlca.19920750408

By:

Tschamber, Théophile;
Backenstrass, Frédérique;
Fritz, Hans;
Streith, Jacques

Publication type:

Article

Caro-Cryptands: Tris-carotenoid macrobicyclic ligands-synthesis, crystal structure, and dinuclear copper(I) complexes.

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1069, doi. 10.1002/hlca.19920750410

By:

Lehn, Jean-Marie;
Vigneron, Jean-Pierre;
Bkouche-Waksman, Itka;
Guilhem, Jean;
Pascard, Claudine

Publication type:

Article

Axially Dissymmetric diphosphines in the Biphenyl Series: Crystal structures of three new group-VIII metal complexes of (6,6′-dimethyl-1,1′-biphenyl-2,2′-diyl)bis(diphenylphosphine) ( = biphemp).

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1211, doi. 10.1002/hlca.19920750421

By:

Knierzinger, Andreas;
Schönholzer, Peter

Publication type:

Article

The Vinylidene/Acyl Coupling at Rhenium Centers.

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1305, doi. 10.1002/hlca.19920750432

By:

Feracin, Sibylle;
Hund, Hans-Ulrich;
Bosch, H. William;
Lippmann, Elisabeth;
Beck, Wolfgang;
Berke, Heinz

Publication type:

Article

SN2 or Electron Transfer?? A new technique discriminates the mechanisms of oxidative addition of alkyl halides to corrinato- and porphyrinatocobalt(I).

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 995, doi. 10.1002/hlca.19920750403

By:

Zhou, De-Ling;
Walder, Peristera;
Scheffold, Rolf;
Walder, Lorenz

Publication type:

Article

Synthèse et propriétés photochromiques de 1, 3-dihydrospiro[2 H-indole-2,3′-[3 H]pyrimido[5,4-f][1,4]benzoxazines] et de 1,3-dihydrospiro[2 H-indole-2,7′-[7 H]thiazolo[5,4- f][1,4]benzoxazines].

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1185, doi. 10.1002/hlca.19920750419

By:

Tardieu, Pascale;
Dubest, Roger;
Aubard, Jean;
Kellmann, Arlette;
Tfibel, Francis;
Samat, André;
Gugliemetti, Robert

Publication type:

Article

Ring-Transformation von Imidazolidin-2,4-dionen ( = Hydantoinen) zu 4 H-Imidazolen bei der Umsetzung mit 3-(Dimethylamino)-2,2-dimethyl-2 H -azirin.

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1251, doi. 10.1002/hlca.19920750425

By:

Schläpfer-Dähler, Marlise;
Mukherjee-Müller, Gabriele;
Heimgartner, Heinz

Publication type:

Article

Mitteilungen.

Published in:: Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1341, doi. 10.1002/hlca.19920750436
Publication type:: Article

Heterocyclen aus Bis(alkoxycarbonyl)keten-ethylen-acetalen ( = Dialkyl-2-(1,3-dioxolan-2-yliden)propan-1,3-dioate). Synthese und Eigenschaften einer neuen Klasse von Pyrazolium-Betainen.

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1039, doi. 10.1002/hlca.19920750407

By:

Neidlein, Richard;
Schröder, Günter;
Krieger, Claus;
Kikelj, Danijel

Publication type:

Article

Base Hydrolysis of Pentaaminecobalt (III) Complexes: The [CoX(dien) (dapo)] n+ system. Part 3. The internal conjugate base mechanism.

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1172, doi. 10.1002/hlca.19920750418

By:

Comba, Peter;
Jackson, W. Gregory;
Marty, Werner;
Zipper, Luc

Publication type:

Article

Benzene Oxidation by 'Bare' FeO+ in the Gas Phase.

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1281, doi. 10.1002/hlca.19920750429

By:

Schröder, Detlef;
Schwarz, Helmut

Publication type:

Article

Confromational Studies on Peptides Containing Enantiometric α-Methyl α-Amino Acids. Part I. Differential conformational properties of ( R)- and ( S)-2-methylaspartic acid.

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1198, doi. 10.1002/hlca.19920750420

By:

Altmann, Karl-Heinz;
Altmann, Eva;
Mutter, Manfred

Publication type:

Article

Studies on the Enzymatic Acylation of Quinic Acid, Shikimic Acid, Shikimic Acid, and Their Derivatives in Organic Solvents.

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1297, doi. 10.1002/hlca.19920750431

By:

Danieli, Bruno;
De Bellis, Paolo;
Barzaghi, Laura;
Carrea, Giacomo;
Ottolina, Gianluca;
Riva, Sergio

Publication type:

Article

Die Entwicklung der Carotinoid-Chemie im Spiegel der Helvetica Chimica Acta 1922-1991.

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 941, doi. 10.1002/hlca.19920750402

By:

Eugster, Conrad Hans

Publication type:

Article

Ab- initio-Studien an N- Acyliminium-Ionen.

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1095, doi. 10.1002/hlca.19920750413

By:

Lamatsch, Bernd;
Seebach, Dieter;
Ha, Tae-Kyu

Publication type:

Article

Struktur zweier trans-Bis ( N, N-dimethylethylendiamin)kobalt(III)-Komplexe. Simulation der sterischen Ligand-Ligand-Wechselwirkungen durch ein 'Molecular-Mechanics'-Modell.

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1245, doi. 10.1002/hlca.19920750424

By:

Eminger, Roman;
Fallab, Silvio;
Zehnder, Margareta;
Dobler, Max

Publication type:

Article

Synthesis and Photochemistry of 5,5-Dimethyl-1 H-pyrrol-2(5 H)-one and of Some N-Substituted Derivatives.

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1333, doi. 10.1002/hlca.19920750435

By:

Ihlefeld, Andreas;
Margaretha, Paul

Publication type:

Article

Pterin Chemistry. Part 92.. Loading experiments with 6α,β-tetrahydro- L-[3′-2H1] biopterin.

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1237, doi. 10.1002/hlca.19920750423

By:

Adler, Carmen;
Curtius, Hans-Christoph;
Wetzel, Erich;
Viscontini, Max;
Giudici, Tullio A.;
Blaskovics, Milan;
Rolland, Marie O.;
Guibaud, Pierre

Publication type:

Article

Kinetic Study on Stability of Schiff Base of Pyridoxal 5′-Phosphate and Leucine in Water Media with Cationic Surfactants.

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1029, doi. 10.1002/hlca.19920750406

By:

Vázquez, Miguel A.;
Muñoz, Francisco;
Donoso, Josefa;
García-Blanco, Francisco

Publication type:

Article

Stereoselectivity in Reactions of Metal Complexes. Part XIV.. Use of circular dichroism to determine the stereoselective formation of [M(his)2] and [M(PhEt-sal)2] (M = Ni2+, Cu2+, his = histidine, PhEt-sal = N-(1-phenylethyl)salicylaldimine)

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1288, doi. 10.1002/hlca.19920750430

By:

Bernauer, Klaus;
Bourqui, Stephanie;
Huti-Cleary, Deirdre;
Warmuth, Ruth

Publication type:

Article

Masthead.

Published in:: Helvetica Chimica Acta, 1992, v. 75, n. 4, p. fmi, doi. 10.1002/hlca.19920750401
Publication type:: Article

The Diels- Alder Chemoselectivity of 3,4,6,7-Tetramethylidenebicyclo[3.2.1]octane-2- exo, 8- syn-diyl Derivatives.

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1085, doi. 10.1002/hlca.19920750412

By:

Claret, François;
Razaname, Alain;
Vogel, Pierre

Publication type:

Article

Base Hydrolysis of Pentaaminecobalt(III) Complexes: The [CoX(dien) (dapo)]n+ system. Part 2. Structure and reactivity of the pentacoordinate intermediate.

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1147, doi. 10.1002/hlca.19920750417

By:

Comba, Peter;
Jackson, W. Gregory;
Marty, Werner;
Zipper, Luc

Publication type:

Article

Eine neue einfache Synthese spirocyclischer 1 H-Chinolin-Derivate.

Published in:

Helvetica Chimica Acta, 1992, v. 75, n. 4, p. 1274, doi. 10.1002/hlca.19920750428

By:

Walter, Harald;
Sauter, Hanspeter;
Winkler, Tammo

Publication type:

Article

Works in Helvetica Chimica Acta, 1992, Vol 75, Issue 4

Complexes of Rhodium(III) with Two Chelating C⁁N Ligands and One Diimine Ligand.

Efficient Synthesis of Enantiomerically Pure α-Ionone from ( R)- and ( S)-α-Damascone.

Base Hydrolysis of Pentaaminecobalt(III) Complexes: The [CoX(dien) (dapo)]<sup> n+</sup> system. Part 1. Syntheses, structures, configuration, and spectroscopy.

Nucleosides. Part L.. Structure of lumazine N<sup>1</sup>-(2′-deoxy- D-ribonucleosides) ( = 1-(2′-deoxy- D-ribofuranosyl)pteridine-2,4(1 H,3 H)-diones): A revision of the anomeric configuration.

Synthesis of Coumarins and Derivatives. Part 1. Biomimetic synthesis of esculetin and halogenated derivatives.

A New Synthesis of Coprine and O-Ethylcoprine.

Synthesis and Properties of Macrobicyclic Cryptates Incorporating Five- and Six-Membered Biheteroaryl Units.

Trialkyltin Compounds as Neutral Carriers for Anions in PVC Liquid Membranes and Complex Formation with Oxoanions.

Photolytic Reactions of ( o-Allylbenzyl)dicarbonyl(η<sup>5</sup>-cyclopentadienyl)iron.

Cycloaddition of Carbodiimides with a Heteroaromatic Substituent to Allenic Acids.

1,7-Dideaza-2′-deoxyadenosine: Building blocks for solid-phase synthesis and secondary structure of base-modified oligodeoxyribonucleotides.

Catalytic One-Pot Osmylation of Cyclohexadienes: Stereochemical and conformational studies of the resulting polyols.

Caro-Cryptands: Tris-carotenoid macrobicyclic ligands-synthesis, crystal structure, and dinuclear copper(I) complexes.

Axially Dissymmetric diphosphines in the Biphenyl Series: Crystal structures of three new group-VIII metal complexes of (6,6′-dimethyl-1,1′-biphenyl-2,2′-diyl)bis(diphenylphosphine) ( = biphemp).

The Vinylidene/Acyl Coupling at Rhenium Centers.

S<sub>N</sub>2 or Electron Transfer?? A new technique discriminates the mechanisms of oxidative addition of alkyl halides to corrinato- and porphyrinatocobalt(I).

Synthèse et propriétés photochromiques de 1, 3-dihydrospiro[2 H-indole-2,3′-[3 H]pyrimido[5,4-f][1,4]benzoxazines] et de 1,3-dihydrospiro[2 H-indole-2,7′-[7 H]thiazolo[5,4- f][1,4]benzoxazines].

Ring-Transformation von Imidazolidin-2,4-dionen ( = Hydantoinen) zu 4 H-Imidazolen bei der Umsetzung mit 3-(Dimethylamino)-2,2-dimethyl-2 H -azirin.

Mitteilungen.

Heterocyclen aus Bis(alkoxycarbonyl)keten-ethylen-acetalen ( = Dialkyl-2-(1,3-dioxolan-2-yliden)propan-1,3-dioate). Synthese und Eigenschaften einer neuen Klasse von Pyrazolium-Betainen.

Base Hydrolysis of Pentaaminecobalt (III) Complexes: The [CoX(dien) (dapo)]<sup> n+</sup> system. Part 3. The internal conjugate base mechanism.

Benzene Oxidation by 'Bare' FeO<sup>+</sup> in the Gas Phase.

Confromational Studies on Peptides Containing Enantiometric α-Methyl α-Amino Acids. Part I. Differential conformational properties of ( R)- and ( S)-2-methylaspartic acid.

Studies on the Enzymatic Acylation of Quinic Acid, Shikimic Acid, Shikimic Acid, and Their Derivatives in Organic Solvents.

Die Entwicklung der Carotinoid-Chemie im Spiegel der Helvetica Chimica Acta 1922-1991.

Ab- initio-Studien an N- Acyliminium-Ionen.

Struktur zweier trans-Bis ( N, N-dimethylethylendiamin)kobalt(III)-Komplexe. Simulation der sterischen Ligand-Ligand-Wechselwirkungen durch ein 'Molecular-Mechanics'-Modell.

Synthesis and Photochemistry of 5,5-Dimethyl-1 H-pyrrol-2(5 H)-one and of Some N-Substituted Derivatives.

Pterin Chemistry. Part 92.. Loading experiments with 6α,β-tetrahydro- L-[3′-<sup>2</sup>H<sub>1</sub>] biopterin.

Kinetic Study on Stability of Schiff Base of Pyridoxal 5′-Phosphate and Leucine in Water Media with Cationic Surfactants.

Stereoselectivity in Reactions of Metal Complexes. Part XIV.. Use of circular dichroism to determine the stereoselective formation of [M(his)<sub>2</sub>] and [M(PhEt-sal)<sub>2</sub>] (M = Ni<sup>2+</sup>, Cu<sup>2+</sup>, his = histidine, PhEt-sal = N-(1-phenylethyl)salicylaldimine)

Masthead.

The Diels- Alder Chemoselectivity of 3,4,6,7-Tetramethylidenebicyclo[3.2.1]octane-2- exo, 8- syn-diyl Derivatives.

Base Hydrolysis of Pentaaminecobalt(III) Complexes: The [CoX(dien) (dapo)]<sup>n+</sup> system. Part 2. Structure and reactivity of the pentacoordinate intermediate.

Eine neue einfache Synthese spirocyclischer 1 H-Chinolin-Derivate.