Works matching IS 0018019X AND DT 1998 AND VI 81 AND IP 5-8
Results: 59
Aldehyde-Promoted Addition of 2-(Trimethylsilyl)thiazole to α,α′-Dialkoxy Ketones: A new way to branched-chain monosaccharides.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 889, doi. 10.1002/hlca.19980810510
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Tetraepoxy[22]annulen(2.2.2.0): Ein neuartiges Tetraepoxy-verbrücktes, neutrales, aromatisches [22]Annulen.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1077, doi. 10.1002/hlca.19980810521
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A Novel and Efficient Synthesis of 14-Alkoxy-Substituted Indolo- and Benzofuromorphinans in the Series of Selective δ Opioid Receptor Antagonists.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1215, doi. 10.1002/hlca.19980810532
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Asymmetric synthesis of pentono- and 6-deoxyhexono-δ-lactams via hetero- Diels- Alder reactions with nitroso dienophile.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1417, doi. 10.1002/hlca.19980810550
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Selective Derivatization of the Ionophore X-206 at C(22) Maintaining Potassium Binding.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 812, doi. 10.1002/hlca.19980810503
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Enantioselektive Synthese von α-substituierten N-Methyl-sulfonamiden. Vorläufige Mitteilung.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1329, doi. 10.1002/hlca.19980810543
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Sulfur-Containing Heterocycles Derived by Reaction of ω-Keto Amides with Lawesson's Reagent.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1207, doi. 10.1002/hlca.19980810531
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γ-Peptides Forming More Stable Secondary Structures than α-Peptides: Synthesis and helical NMR-solution structure of the γ-hexapeptide analog of H-(Val-Ala-Leu)<sub>2</sub>-OH.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 983, doi. 10.1002/hlca.19980810514
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Synthesis of Vitamin-B<sub>12</sub> Derivatives with an Electropolymerizable Side Chain.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1117, doi. 10.1002/hlca.19980810525
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Origin of the Stereoselectivity in (Ethoxycarbonyl)-, Cyano-, and Phenyl-Substituted (Arylsulfinyl)methyl Radicals.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1048, doi. 10.1002/hlca.19980810518
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Synthesis of 1-(1 H-Imidazol-2-yl)ethane-1,2-diol Derivatives: A novel class of protein kinase C inhibitors.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1070, doi. 10.1002/hlca.19980810520
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New Enzyme Models of Chloroperoxidase: Improved stability and catalytic efficiency of iron porphyrinates containing a thiolato ligand.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1506, doi. 10.1002/hlca.19980810554
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Cooperative Interactions of the Catalytic Nucleophile and the Catalytic Acid in the Inhibition of β-Glycosidases. Calculations and their validation by comparative kinetic and structural studies of the inhibition of glycogen phosphorylase b.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 853, doi. 10.1002/hlca.19980810507
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Synthesis and Spectroscopic Characterization of 4-Chlorophenyl Isocyanate (= 1-chloro-4-isocyanatobenzene) Adducts with Amino Acids as Potential Dosimeters for the Biomonitoring of Isocyanate Exposure.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1254, doi. 10.1002/hlca.19980810536
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A Novel NO<sub>2</sub>/OH Exchange in α-Nitro Ketones: A mechanistic investigation.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1373, doi. 10.1002/hlca.19980810547
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Lipase-Catalyzed Acetylation of 3-Substituted 2,3-Dihydro-1 H-1,4-benzodiazepin-2-ones: Effect of temperature and conformation on enantioselectivity and configuration.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1567, doi. 10.1002/hlca.19980810558
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Synthesis of Oligo(3-hydroxybutanoate)(OHB)-Containing Peptides with High Binding Affinity to a Class-I-MHC Protein.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1181, doi. 10.1002/hlca.19980810529
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Synthesis of Oligonucleotides Containing 2′-Deoxyisoguanosine and 2′-Deoxy-5-methylisocytidine Using Phosphoramidite Chemistry.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 793, doi. 10.1002/hlca.19980810502
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3-Hydroxy-2-cyanoalk-2-enamides, and 2-Cyano-2-(tetrahydrofuran-2-ylidene)- and 2-Cyano-2-(tetrahydropyran-2-ylidene)acetamides: Synthesis, structure, and solvent-dependent ( Z)/( E)-isomerism.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1319, doi. 10.1002/hlca.19980810542
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β<sup>2</sup>- and β<sup>3</sup>-Peptides with Proteinaceous Side Chains: Synthesis and solution structures of constitutional isomers, a novel helical secondary structure and the influence of solvation and hydrophobic interactions on folding
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 932, doi. 10.1002/hlca.19980810513
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Makrocyclische [4 n + 2]- Hückel-Aromaten bis n = 9 und [4 n]-Antiaromaten bis n = 10: Homologe Reihen vom Tetraepoxy[24]-annulen(2.0.2.0) zum Tetraepoxy[40]annulen(12.0.12.0) und vom 'Tetraoxa-[22]porphyrin(2.0.2.0)'-zum 'Tetraepoxa[38]porphyrin(12.0.12.0)'-Dikation
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1480, doi. 10.1002/hlca.19980810553
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Synthesis of Vitamin-B<sub>12</sub> Derivatives with Peripheral Tris(oxyethylene) Chains.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1105, doi. 10.1002/hlca.19980810524
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Partial Synthesis and Characterization of Capsokarpoxanthins and 3,6-Epoxcapsanthins.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1242, doi. 10.1002/hlca.19980810535
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Synthesis and Structure Elucidation of a New Potent Sandalwood-Oil Substitute.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1349, doi. 10.1002/hlca.19980810545
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Nucleotides. Part LVII.. Synthesis of phosphoramidite building blocks of 2′-amino-2′-deoxyribonucleosides: New compounds for oligonucleotide synthesis.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1528, doi. 10.1002/hlca.19980810556
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Nucleotides. Part LVI. Synthesis and biological activity of modified (2′-5′)triadenylates containing 2′-terminal 2′,3′-dideoxy-3′-fluoroadenosine derivatives.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1278, doi. 10.1002/hlca.19980810538
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NMR Verification of Helical Conformations of Phycocyanobilin in Organic Solvents.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 881, doi. 10.1002/hlca.19980810509
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8-Azaadenosine and Its 2′-Deoxyribonucleoside: Synthesis and oligonucleotide base-pair stability.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1139, doi. 10.1002/hlca.19980810527
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An Unusual Acyliminium Cyclization and Other Drawbacks during an Attempted Synthesis of a Chiral Primary α-Phosphinoalkanamine.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 845, doi. 10.1002/hlca.19980810506
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Glycosylidene Carbenes. Part 27. Glucosidation of titanium dioxide with 1-aziglucoses: Preparation and characterization of modified titanium-dioxide surfaces.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1359, doi. 10.1002/hlca.19980810546
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α-Methylidene-γ-butyrolactones: Synthesis and evaluation of quinolin-2(1 H)-one derivatives.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1038, doi. 10.1002/hlca.19980810517
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Nucleosides. Part LXIII. Acetals as new 2′- O-protecting functions for the synthesis of oligoribonucleotides: Synthesis of uridine building blocks and evaluation of their relative acid stability.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1545, doi. 10.1002/hlca.19980810557
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Acridine-Labeled Primers as Tools for the Study of Nonenzymatic RNA Oligomerization.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1156, doi. 10.1002/hlca.19980810528
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New Types of Potentially Antimalarial Agents: Epidioxy-substituted norditerpene and norsesterpenes from the marine sponge Diacarnus levii.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1285, doi. 10.1002/hlca.19980810539
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Hydrogen Isotope Effect on the Isomerization of Peroxynitrous Acid.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1201, doi. 10.1002/hlca.19980810530
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Masthead.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. fmi, doi. 10.1002/hlca.19980810501
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Synthesis of the Spermidine Alkaloid (−)-(4 R)-Dihydroisomyricoidine.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1303, doi. 10.1002/hlca.19980810541
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Distamycin-NA: A DNA analog with an aromatic heterocyclic polyamide backbone. Part 2. Solid-phase synthesis of distamycin-NAs containing the nucleobase uracil: Unexpected solvent participation in the coupling step.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 916, doi. 10.1002/hlca.19980810512
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Synthesis of C-Linked Imino Disaccharides (= Aza- C-disaccharides) with a Pyrrolidine-3,4-diol Moiety Attached at C(3) of Galactose via a Hydroxymethylene Linker and of a 7-(1,2,3-Trihydroxypropyl)-octahydroxyindolizine-1,2,6,8-tetrol.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1439, doi. 10.1002/hlca.19980810552
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Aminocyclopentitols from N-Alkylpyridinium Salts: A photochemical approach.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1095, doi. 10.1002/hlca.19980810523
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Isolation of Carotenoids with 3,5,6-Trihydroxy-5,6-dihydro-β-end Groups from Red Paprika ( Capsicum annuum).
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1233, doi. 10.1002/hlca.19980810534
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Kinetic Study of the Reaction of Pyridoxal 5′-Phosphate with Hydrazino Compounds of Pharmacological Activity.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 837, doi. 10.1002/hlca.19980810505
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Minor Coumarins from Calophyllum teysmannii var. inophylloide and Synthesis of Cytotoxic Calanone Derivatives.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1404, doi. 10.1002/hlca.19980810549
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Antitumor Agents. Part 184. Syntheses and antitubulin activity of compounds derived from reaction of thiocolchicone with amines: Lactams, alcohols, and ester analogs of allothiocolchicinoids.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1023, doi. 10.1002/hlca.19980810516
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Synthesis of Thiophene-Substituted 3 H-Naphtho[2,1- b]pyrans, Precursors of Photomodulated Materials.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1293, doi. 10.1002/hlca.19980810540
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Heterosupramolecular Chemistry: Synthetic strategies for the covalent and noncovalent assembly and organization of nanocrystals and molecules.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 902, doi. 10.1002/hlca.19980810511
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1,2-Carbonyl Transposition of a Protected Rubanone: Stereoselective synthesis of bicyclic and tricyclic lactams derived from quinidine.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1429, doi. 10.1002/hlca.19980810551
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8-Fluoro-6-(methoxymethoxy)quinoline: Synthesis and regioselective functionalization via reaction with organolithium compounds.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1088, doi. 10.1002/hlca.19980810522
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On the Origin of Asymmetric Induction of the Palladium-Catalyzed Allylic Substitution Reaction with Chiral 4,4-Disubstituted 4,5-Dihydro-2-(phosphinoaryl)oxazole Ligands.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 1223, doi. 10.1002/hlca.19980810533
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A Novel Hydrocarbon, 8,10-Dimethylidenetricyclo[7.1.1.0<sup>2,7</sup>]undeca-2,4,6-triene: Synthesis of benzopinane skeleton via di-π-methane rearrangement of benzonorbornadiene system.
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- Helvetica Chimica Acta, 1998, v. 81, n. 5-8, p. 828, doi. 10.1002/hlca.19980810504
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