Works matching IS 0018019X AND DT 1991 AND VI 74 AND IP 8
Results: 46
A Convenient Synthesis of Vinyl Sulfides.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1931, doi. 10.1002/hlca.19910740830
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Masthead.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. fmi, doi. 10.1002/hlca.19910740801
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Characterization of Nitrosocarbonyl Compounds by Neutralization-Reionization Mass Spectrometry.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 2068, doi. 10.1002/hlca.19910740841
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Dependence of the Regioselectivity of Photo-oxidative Ring Opening of the Chlorophyll Macrocycle on the Complexed Metal Ion.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1713, doi. 10.1002/hlca.19910740812
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Helicity Induction in Helicate Self-Organisation from Chiral Tris(bipyridine) Ligand Strands.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1843, doi. 10.1002/hlca.19910740827
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Energy Transfer within Oligonucleotides from a Lumazine (= Pteridine-2,4(1 H,3 H)-dione) Chromophore to Bathophenanthroline-ruthenium(II) Complexes.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1991, doi. 10.1002/hlca.19910740834
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Synthesis of Aristotelia-type alkaloids. Part IX. Synthesis of (±)-alloaristoteline.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1643, doi. 10.1002/hlca.19910740805
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Glycosylidene Carbenes. Part 5. Synthesis of Glycono-1,5-lactone Tosylhydrazones as Precursors of Glycosylidene Carbenes.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 2100, doi. 10.1002/hlca.19910740845
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2′-Deoxyisoguanosine and Base-Modified Analogues: Chemical and Photochemical Synthesis.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1742, doi. 10.1002/hlca.19910740816
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Steric Effects on Reaction Rates. Part XII. Force-Field Calculations for the Solvolysis of Cyclobutyl and Tricyclyl Derivatives.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1808, doi. 10.1002/hlca.19910740823
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Structure Determination of New Iridals from Iris pallida and Iris foetidissima.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 2035, doi. 10.1002/hlca.19910740838
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Radical Cations and Radical Anions of Three Bridgehead Azopolycycloalkanes: A Fluid-Solution ESR Study.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 2094, doi. 10.1002/hlca.19910740844
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Metal complexes with macrocyclic ligands. Part XXXIV. Geometrical and conformational changes during the on/off reaction of the side chain in the Cu<sup>II</sup> complex of 11-(3-aminopropyl)-1,4,7,11-tetraazacyclotetradecane.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1689, doi. 10.1002/hlca.19910740809
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Enzymatic Formation of Raucaffricine, the Major Indole Alkaloid of Rauwolfia serpentina Cell-Suspension Cultures.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1707, doi. 10.1002/hlca.19910740811
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New Dolabellane Derivatives from the Brown Alga Dictyota pardalis.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1801, doi. 10.1002/hlca.19910740822
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Thiocyclosporins: Preparation, Solution and Crystal Structure, and Immunosuppressive Activity.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1953, doi. 10.1002/hlca.19910740833
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Synthesis of Aristotelia-type alkaloids. Part VIII. Synthesis of (±)-aristolasicone.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1636, doi. 10.1002/hlca.19910740804
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9-(2′-Deoxy-β- D-xylofuranosyl)adenine Building Blocks for Solid-Phase Synthesis and Properties of Oligo(2′-deoxy-xylonucleotides).
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 2054, doi. 10.1002/hlca.19910740840
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Unimolecular Gas-Phase Oxidation of Terminal Hydroxy Groups in [FeO(CH<sub>2</sub>)<sub> n</sub>OH]<sup>+</sup> Complexes ( n = 2-8). A Case for OH Bond Activation by Late Transition-Metal Ions. Preliminary Communication.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1739, doi. 10.1002/hlca.19910740815
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A Molecular-Mechanics Analysis of Complexes of the Sexidentate Macrocycles cis- and trans-6,13-Dimethyl-1,4,8,11-tetraazacyclotetradecane-6,13-diamine.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1834, doi. 10.1002/hlca.19910740826
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Synthesis of N, N-Disubstituted Lactone Hydrazones via (Sulfonylimino)-ethers.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 2024, doi. 10.1002/hlca.19910740837
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Cuprous complexes and dioxygen. Part 11. Concomitant one- and two-electron reduction of O<sub>2</sub> by the Cu.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1679, doi. 10.1002/hlca.19910740808
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New Alkoxypyridine-sulfonamides: Synthesis, Biological Evaluation, and Physicochemical Properties.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1764, doi. 10.1002/hlca.19910740819
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Coenzyme F430 from Methanogenic Bacteria: Detection of a Paramagnetic Methylnickel(II) Derivative of the Pentamethyl Ester by <sup>2</sup>H-NMR Spectroscopy.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1725, doi. 10.1002/hlca.19910740814
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3-Deazaguanine N<sup>7</sup>- and N<sup>9</sup>-(2′-Deoxy-β- D-ribofuranosides): Building Blocks for Solid-Phase Synthesis and Incorporation into Oligodeoxyribonucleotides.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1790, doi. 10.1002/hlca.19910740821
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Stereoselective Hydrolysis of Substituted Cyclopropanedicarboxylates with Pig Liver Esterase.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1941, doi. 10.1002/hlca.19910740832
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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.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1622, doi. 10.1002/hlca.19910740803
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Radical Anions of Cyclic Azoalkanes: An ESR, ENDOR, and TRIPLE-Resonance Study.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 2078, doi. 10.1002/hlca.19910740843
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Synthesis of New Phospholipids Linked to Steroid-Hormone Derivatives Designed for Two-Dimensional Crystallization of Proteins.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1697, doi. 10.1002/hlca.19910740810
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<sup>3</sup> J(H,H) Coupling Constants as a Simple Criterion for π Delocalization of Pentafulvenes and Pentafulvalenes.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1823, doi. 10.1002/hlca.19910740825
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Addition of Carbon Nucleophiles to Tricarbonylchromium Complexes of 1,2-Dihydrocyclobutabenzene, Indane, 1,2,3,4-Tetrahydronaphtbalene and ortho-Xylene.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 2009, doi. 10.1002/hlca.19910740836
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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.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1671, doi. 10.1002/hlca.19910740807
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Isomerès optiques du naftidrofuryl ( = 2-[(naphth-1-yl)méthyl]-3-(tétrahydrofur-2-yl)propanoate de 2-(diéthylamino) éthyle).
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1757, doi. 10.1002/hlca.19910740818
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A Novel Synthesis of tert- Alkyl Sulfides.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1924, doi. 10.1002/hlca.19910740829
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Stereochemical Studies on Homoterpene Biosynthesis in Higher Plants; Mechanistic, Phylogenetic, and Ecological Aspects.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1773, doi. 10.1002/hlca.19910740820
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Isomerization of N-[α-(Alkylthio)alkyl]- and N-[α-(Arylthio)alkyl]benzotriazoles.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1936, doi. 10.1002/hlca.19910740831
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Gas-Phase Chemistry of Ti<sup>+</sup> to Zn<sup>+</sup> with Butyl Isothiocyanate.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1609, doi. 10.1002/hlca.19910740802
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Convenient Synthesis of 2-Azido-2-deoxy-aldoses by Diazo Transfer.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 2073, doi. 10.1002/hlca.19910740842
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Metal π-complexes of benzene derivatives. Part. 38. Pentaphenyltriphosphane(5) as a chelating η<sup>12</sup>-ligand. Unusual formation of an interannular -(PPh)<sub>3</sub>-bridge at bis(benzene)chromium.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1718, doi. 10.1002/hlca.19910740813
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Reaction of the 5-Azoniafulvene Ion with Enamines: A New Approach to Pyrrolizines.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1817, doi. 10.1002/hlca.19910740824
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Energy Transfer from a Lumazine (= Pteridine-2,4(1 H,3 H)-dione) Chromophore to Bathophcnanthroline-ruthenium(II) Complexes during Hybridization Processes of DNA.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 2000, doi. 10.1002/hlca.19910740835
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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.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1653, doi. 10.1002/hlca.19910740806
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A Highly Convergent Total Synthesis of (+)-Myxovirescine M<sub>2</sub>. Preliminary Communication.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 2112, doi. 10.1002/hlca.19910740846
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On the Stability of the Schiff Bases of Pyridoxal 5′-Phosphate with Polypeptides Containing L-Lysine.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1749, doi. 10.1002/hlca.19910740817
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Synthese des Makrolid-Antibiotikums (−)-A26771B mit Photolactonisierung als Schlüsselreaktion und Computersimulation als effektive Optimierungshilfe.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 1853, doi. 10.1002/hlca.19910740828
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Synthesis of a Glucose-Derived Tetrazole as a New β-Glucosidase Inhibitor. A New Synthesis of 1-Deoxynojirimycin.
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- Helvetica Chimica Acta, 1991, v. 74, n. 8, p. 2043, doi. 10.1002/hlca.19910740839
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