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21Author    Friedrich Boberg, Rainer VossRequires cookie*
 Title    Markierte Verbindungen, XXV 1 Chloraustausch zwischen und Antimon(III)-chlorid -das 1.2.3-Trichlorpropenylium-Ion On Labelled Compounds, XXV 1 Chlorine Exchange between 1,2,3,3-Tetrachloro-l-propene and Antimony(Ill)-chloride — the 1,2,3-Trichloropropenylium Ion  
  Reference    (Z. Naturforsch. 31b, 480—486 [1976]; eingegangen am 13. November 1975) 
  Published    1976 
  Keywords    Chlorine Exchange, 1, 2, 3, 3-Tetrachloro-l-propene, 1, 2, 3-Trichloropropenylium Ion, Ally lie Rearrangement, eis j trans-Isomerization 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0480.pdf 
 Identifier    ZNB-1976-31b-0480 
 Volume    31 
22Author    NarendraS. SridharaRequires cookie*
 Title    Thermal Decomposition of P,P-diphenyl-N-benzyl-phosphinothioic Amide and P,P-diphenyl-N-methyl-phosphinothioic Amide  
  Reference    Z. Naturforsch. 33b, 212—213 (1978); received July 1 1977 
  Published    1978 
  Keywords    2, 2, 4, 4, 6, 6-Hexaphenylcyclophosphazatriene, Diphenylphosphinothioic Amide, 113355-Hexaphenyl-1 -methylaminotriphosphazene-5-sulphide, P, P-Diphenyl-N-dimethylphosphinothioic Amide 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0212.pdf 
 Identifier    ZNB-1978-33b-0212 
 Volume    33 
23Author    Ringverengungsreaktionen Von Chinolintrionen, Helga Wittmann, Friedrich GünzlRequires cookie*
 Title    Synthesen von Heterocyclen, CCVIII [1] Zur Chemie der vicinalen Triketone, XI [2]  
 Abstract    -lH,5H-benzo [ij] quinolizine (I) does not react with 2-aminopyridine to give a Schiff base [2], but reacts by ringcontraction to the spiro-indolone 1/1, which can be hydrolysed to l-(2-pyridyl-amino)l,2,5,6-tetrahydro-4H-pyrrolo[3,2,l-ij]quinoline-2-one (2/1). In the same way the reaction of I resp. 1-phenyl-quinolinetrione (LI) with tfert-butylamine in aliphatic alcohols yields by ringcontraction the indolone acid esters 5 a-c. Reaction of I with £er£-butylamine without solvent forms the ringcontracted amide 5c/I. 
  Reference    Z. Naturforsch. 33b, 1540—1546 (1978); eingegangen am 12. Juli 1978 
  Published    1978 
  Keywords    Quinolinetriones, Ringcontractions, 2-Aminopyridine, 2, 3-Diaminopyridine, Zerf-Butylamine l, 2, 3-Trioxo-2, 3, 6, 7-tetrahydro 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-1540.pdf 
 Identifier    ZNB-1978-33b-1540 
 Volume    33 
24Author    Herbert Fisch, Hans Pritzkow, Walter SiebertRequires cookie*
 Title    Enthalogenierung von Bis(diisopropylamino-chlorboryl)methan: Lösungsmittelabhängige Bildung eines 1,2,4,5-Tetraborinan-und eines l-Aza-2,4-diborolidin-Derivats Dehalogenation of Bis(diisopropylamino-chloroboryl)methane: Solvent-dependent Formation of a 1,2,4,5-Tetraborinane and of a l-Aza-2,4-diborolidine Derivative  
  Reference    Z. Naturforsch. 43b, 658—664 (1988); eingegangen am 7. Dezember 1987 
  Published    1988 
  Keywords    l, 2, 4, 5-Tetrakis(diisopropylamino-chloroboryl)-l, 2, 4, 5-tetraborinane, l-Aza-2, 4-diborolidine Derivatives 
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 TEI-XML for    default:Reihe_B/43/ZNB-1988-43b-0658.pdf 
 Identifier    ZNB-1988-43b-0658 
 Volume    43 
25Author    G. Unther Seitz, Johanna SieglRequires cookie*
 Title    Synthese neuer Pyridin-C-nukleoside der 2 ,3 -D i d e s o x y r i b o s e durch "inverse" [4+2]-Cycloaddition Synthesis of Novel Pyridine-C-nucleosides of 2,3-Dideoxyribose by "Inverse" [4+2]-Cycloaddition  
 Abstract    The anomeric imido esters 5 and 6, appropriate precursors for C-nucleoside synthesis, were prepared and utilized as heterodienophiles in a Diels-Alder reaction with inverse electron 
  Reference    Z. Naturforsch. 52b, 851—858 (1997); eingegangen am 22. April 1997 
  Published    1997 
  Keywords    Pyridine-C-nucleosides, "Inverse" [4+2] Cycloadditions, 1, 2, 4-Triazine-C-nucleosides, 2, 3'-Dideoxy-/?-D-ribofuranosyl-pyridines 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0851.pdf 
 Identifier    ZNB-1997-52b-0851 
 Volume    52 
26Author    Armin Traub, Hans GeigerRequires cookie*
 Title    Nachweis  
 Abstract    von,-Pentahydroxy-flavanon-5-glucosid in den Samen von G a le g a o f f ic in a lis L. (Fabaceae) Detection of 2,5,7,3/,4/-Pentahydroxy-flavanone-5-glucoside in the Seeds of Galega officinalis L. (Fabaceae) 
  Reference    (Z. Naturforsch. 30c, 823 [1975]; eingegangen am 14. Juli 1975) 
  Published    1975 
  Keywords    Galega officinalis L, Fabaceae, 2, 5, 7, 3', 4'-Pentahydroxy flavanon, 2, 4, 6, 3', 4'-Pentahydroxydibenzoylmethane, Flavonoids, Glycosides 
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 TEI-XML for    default:Reihe_C/30/ZNC-1975-30c-0823_n.pdf 
 Identifier    ZNC-1975-30c-0823_n 
 Volume    30 
27Author    Ryszard Stolarski3, Zygmunt Kazimierczuk3, Piotr Lassotab, David Shugara-Requires cookie*
 Title    Acyclo Nucleosides and Nucleotides: Synthesis, Conformation and Other Properties, and Behaviour in Some Enzyme Systems, of 2',3'-Seco Purine Nucleosides, Nucleotides and 3 ':5'-Cyclic Phosphates, Analogues of cAMP and cGMP  
 Abstract    The 3':5'-cyclic phosphates of 2',3'-secoadenosine and guanosine, structural analogues of cAMP and cGMP, were synthesized by cyclization of the 5'-phosphates of 2',3'-secoadenosine and guanosine, respectively. The 2',3'-seco-3':5'-cAMP was converted to the IM P analogue by nitrous acid deamination, and to the 8-bromo analogue by bromination. Chemical phosphorylation of 2',3'-secoadenosine gave four products, the major one of which, in 50% yield, was 2',3'-seco-3':5'-cAMP, identical to that obtained by the cyclization reaction above. The three other products have been tentatively identified. The conformations in solution of the seco nucleosides, their 5'-monophosphates, and their 3':5'-cyclic phosphates, were determined with the aid of 'H , 13C and 31P N M R spectroscopy, particular attention being devoted to orientations about the C —O bonds and the glycosidic bond, and the results compared with crystallographic data available for the 2',3'-seco congener of ribofuranosyl benzimidazole. The findings are briefly discussed in relation to substrate and inhibitor properties in some enzyme systems. Some of the foregoing compounds have been examined as potential enzyme substrates and inhibitors. In particular, the seco 3':5'-cyclic phosphates are resistant to cAM P cyclic phos­ phodiesterase of mammalian origin, but are slowly hydrolyzed by purified higher plant cyclic nucleotide phosphodiesterase to the corresponding monophosphates. 
  Reference    Z. Naturforsch. 41c, 758—770 (1986); received March 17 1986 
  Published    1986 
  Keywords    2', 3'-Seco Cyclic Nucleotides, cAMP and cGMP Analogues, Synthesis, Phosphorylation, N M R and Conformation, Enzymology 
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 TEI-XML for    default:Reihe_C/41/ZNC-1986-41c-0758.pdf 
 Identifier    ZNC-1986-41c-0758 
 Volume    41 
28Author    Werner GosselRequires cookie*
  Reference    (Z. Naturforsch. 27b, 1005—1006 [1972]; eingegangen am 24. April/ 7. Juni 1972) 
  Published    1972 
  Keywords    sulfuric acid, 2, 2-Dimethyltriazanium salts 
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 TEI-XML for    default:Reihe_B/27/ZNB-1972-27b-1005_n.pdf 
 Identifier    ZNB-1972-27b-1005_n 
 Volume    27 
29Author    Requires cookie*
 Title    Cleavage Reactions o f 5-Arylazo Derivatives o f l-M ethyl-2-benzyl-2-im idazolin-4-ones  
 Abstract    N azm i A b d e l L a t if K a s s a b , A b d e l H a m id H a k h a s h , and S a n n a O sm a n A b d A lla h The 5-arylazo-l-methyl-2-benzyl-2-imidazolin-4-ones (la-c) undergo ring cleavage 
  Reference    (Z. Naturforsch. 30b, 603—605 [1975]; received March 10 1975) 
  Published    1975 
  Keywords    Rearrangement Reaction, 1, 2, 4-Triazinones, Grignard Reaction 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0603.pdf 
 Identifier    ZNB-1975-30b-0603 
 Volume    30 
30Author    NasimH. Pirzada, LindsayA. SummersRequires cookie*
 Title    Chemical Constitution and Activity of Bipyridylium Herbicides, XI 1 A Diquaternary Salt of 2,2' -Oxydipyridine  
 Abstract    A diquaternary salt of 2,2'-oxydipyridine has been prepared using methyl fluoro-sulphonate as quaternising agent. It is unstable at physiological pH values and is reduced at a much lower potential than the bipyridylium herbicides, diquat and paraquat. 
  Reference    (Z. Naturforsch. 31b, 122—123 [1976]; received May 26 1975) 
  Published    1976 
  Keywords    Bipyridylium Salts, Herbicides, 2, 2'-Oxydipyridine 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0122.pdf 
 Identifier    ZNB-1976-31b-0122 
 Volume    31 
31Author    M. M., P. Či, S. InRequires cookie*
 Title    The Preparation of Some Unsymmetrically 2,2' -Disubstituted Stilbenes  
 Abstract    The new unsym m etrically 2,2'-disubstituted stilbenes with NO2 , F, Cl, Br, OCH3 , CH3 and NH2 groups as substituents have been prepared by W it t ig or P e r k i n reactions. The compounds 1 -8 were prepared due to the studies o f fragm entation on electron impact, photochem istry and photoelectron spectroscopy. Their geometrical configuration has been established by X H NMR and IR spectra. 
  Reference    (Z. Naturforsch. 32b, 181—183 [1977]; received October 18 1976) 
  Published    1977 
  Keywords    2, 2'-Disubstituted Stilbenes, Synthesis, Configuration 
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 TEI-XML for    default:Reihe_B/32/ZNB-1977-32b-0181.pdf 
 Identifier    ZNB-1977-32b-0181 
 Volume    32 
32Author    Annegret Lipka, Hartmut WunderlichRequires cookie*
 Title    Die Kristallstruktur des l:l-Komplexes von Antimontrichlorid und 2.2'-Bipyridin The Crystal Structure of the 1:1 Complex of Antimony Trichloride and 2,2'-Bipyridine  
 Abstract    The crystal structure of the complex compound of SbCL with a chelating bipyridyl group was determined. Sb(CioH8N2)Cl3 crystallizes in the space group P2i/c with a = 818.9(4), b = 695.8(7), c = 2331.3(12) pm, ß = 103.59(4)° and Z = 4 molecules per unit cell. The SbCL fragment is T-shaped with <Sb-Cl> at 254.7 pm. Taking into account also the N atoms of the chelating 2,2'-bipyridyl group (<Sb-N> = 228.1 pm) and an inter-molecular Sb-Cl contact at 334.0 pm the Sb coordination is distorted octahedral. 
  Reference    Z. Naturforsch. 35b, 1548—1551 (1980); eingegangen am 22. August 1980 
  Published    1980 
  Keywords    Stereochemistry, Crystal Structure, Antimontrichloride, 2, 2'-Bipyridine 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1548.pdf 
 Identifier    ZNB-1980-35b-1548 
 Volume    35 
33Author    Gerd Becker, Gudrun Gresser, Werner UhlRequires cookie*
 Title    Acyl-und Alkylidenphosphane, XV [1] 2.2-Dimethylpropylidinphosphan, eine stabile Verbindung mit einem Phosphoratom der Koordinationszahl  
 Abstract    In the presence of small amounts of solid sodium hydroxide, [2,2-dimethyl-l-(trimethyl-siloxy)propylidene]-trimethylsilylphosphine reacts at -f 20 °C to give hexamethyldisil-oxane and 2,2-dimethylpropylidynephosphine (2). In contrast to similar alkylidyne-phosphines this compound is stable at room temperature. The IR and mass spectrum are discussed, and iH, 13 C and 31 P NMR spectral data are given. 
  Reference    (Z. Naturforsch. 36b, 16—19 [1981]; eingegangen am 3. Oktober 1980) 
  Published    1981 
  Keywords    Alkylidynephosphines, 2, 2-Dimethylpropylidynephosphine, P-C Triple Bond 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-0016.pdf 
 Identifier    ZNB-1981-36b-0016 
 Volume    36 
34Author    Klaus Burger, Herbert GothRequires cookie*
 Title    Positionsselektivität und Regiochemie bei Abfangreaktionen mit Heterokumulenen Cycloaddition Behaviour of Bis(trifluoromethyl) Substituted Nitrile Ylides [1] Site Selectivity and Regiochemistry of Trapping Reactions with Heterocumulenes  
 Abstract    3,3-bis(trifluoromethyl)-2,2-dihydro-l,4,2-oxazaphosphol-4-enes on thermolysis undergo a 1,3-dipolar cycloreversion reaction with formation of bis(trifluoro-methyl) substituted nitrile ylides and trimethyl phosphate. The nitrile ylides are trapped by N-8ulfinyl aniline, phenyl isocyanate, phenyl isothiocyanate, diphenyl ketene, and carbon disulfide. Site selectivity and regiochemistry of the [3 + 2]cycloaddition reactions are described. The results are compared with those obtained from [3 + 2]cycloaddition reactions of nitrile imines, nitrile oxides, alkyl, and aryl substituted nitrile ylides with heterocumulenes. 
  Reference    Z. Naturforsch. 37b, 473—485 (1982); eingegangen am 30. September 1981 
  Published    1982 
  Keywords    1, 3-Dipolar Cycloreversion Reactions, 2, 2-Dihydro-l, 4, 2-oxazaphosphol-4-enes, Trifluoromethyl Substituted 1, 3-Dipoles, Partially Fluorinated Heterocyclic Compounds 2, 2, 2-Trimethoxy- 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-0473.pdf 
 Identifier    ZNB-1982-37b-0473 
 Volume    37 
35Author    Siegfried PohlRequires cookie*
 Title    Synthesis and Crystal Structure of a Polymeric Adduct of 2,2'-Dipyridil and Iodine: CioHgN^  
 Abstract    The reaction of 2,2'-dipyridil with iodine (I2; molar ratio 1:3) in CH2C12 solution yields the polymeric complex 2,2'-dipyridil(I2)3. The crystal structure of the compound was determined from single crystal X-ray data (monoclinic, C2/c, a — 3215.0(16), b = 439.9(1), c = 1824.1(9) pm, ß = 130.79(3)°, Z = 4). 2,2'-Dipyridil(I2)3 forms infinite chains of alternating Iß units and bifunctional dipyri-dil molecules. 
  Reference    Z. Naturforsch. 38b, 1535—1538 (1983); eingegangen am 12. Juli 1983 
  Published    1983 
  Keywords    2, 2'-Dipyridil(I2)3, Preparation, Crystal Structure 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-1535.pdf 
 Identifier    ZNB-1983-38b-1535 
 Volume    38 
36Author    E. Hanecker, H. NöthRequires cookie*
 Title    Beiträge zur Chemie des Bors, 163 [1] Die Molekülstruktur zweier Silaborazine Contributions to the Chemistry of Boron, 163 [1] The Molecular Structure of Two Silaborazines  
  Reference    Z. Naturforsch. 40b, 717—721 (1985); eingegangen am 4. Januar 1985 
  Published    1985 
  Keywords    2, 3, 4, 5, 6-Pentamethyl-l, l-diphenyl-l-silaborazine, 2, 4, 5, 6-Tetramethyl-l, l, 3, 3-tetraphenyl-l, 3-disilaborazine, X-Ray Structure 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0717.pdf 
 Identifier    ZNB-1985-40b-0717 
 Volume    40 
37Author    ShyamK. Singh, LindsayA. SummersRequires cookie*
 Abstract    Departm ent o f Chem istry, The U niversity o f N ew castle, Reaction o f 2,3'-bipyridine with dibrom oalkanes affords both r-brom oalkyl-2,3'-bipyridinium bromides and l',l"'-(alkanediyl)-bis-2,3'-bipyridinium dibromides. The latter diquaternary salts react with dimethyl sulfate to afford r,l'" -(alk anediyl)-b is-(l-m ethyl-2,3'-bip yridinium) tetra­ quaternary salts which are reduced to diradical dications at potentials (E 0) o f about —0.47 V to -0 .6 2 V. 
  Reference    Z. Naturforsch. 41b, 239 (1986); received Septem ber 19 1985 
  Published    1986 
  Keywords    2, 3'-Bipyridinium Tetraquaternary Salts, Reduction Potentials, Diradical Dications 
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 TEI-XML for    default:Reihe_B/41/ZNB-1986-41b-0239.pdf 
 Identifier    ZNB-1986-41b-0239 
 Volume    41 
38Author    Richard Neidlein, Dagmar Knecht, Alfred Gieren, Catalina Ruiz-PérezRequires cookie*
 Abstract    The synthesis of 1 by reaction of phenanthro[9,10-c]-l,2,5-selenadiazole with ethylmagnesium-bromide and TeCI 4 is described; the X-ray structure analysis is reported. 
  Reference    (Z. Naturforsch. 42b, 84—90 [1987]; eingegangen am 9. August 1986) 
  Published    1987 
  Keywords    Chalkogen-Diimides, 1, 2, 5-Telluradiazole, X-Ray 
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 TEI-XML for    default:Reihe_B/42/ZNB-1987-42b-0084.pdf 
 Identifier    ZNB-1987-42b-0084 
 Volume    42 
39Author    Josef Hahn, Tina NatanielRequires cookie*
 Title    Synthese und Eigenschaften von 3,6-Diorgano-3,6-dithio  
 Abstract    l,2,4,5,3,6-tetrathiadiphosphorinanen; eine neue Möglichkeit zur Knüpfung von S—S-Bindungen Synthesis and Properties of 3,6-D iorgano-3,6-dithio-l,2,4,5,3,6-tetrathiadiphosphorinanes; a New Possibility of Forming S—S Bonds 
  Reference    Z. Naturforsch. 42b, 1263 (1987); eingegangen am 15. Mai 1987 
  Published    1987 
  Keywords    3, 6-Diorgano-3, 6-dithio-l, 2, 4, 5, 3, 6-tetrathiadiphosphorinanes, 3, 5-Dimethyl-3, 5-dithio-l, 2, 4, 3, 5-trithiadiphospholan, Heterocycles, Formation of S -S Bonds 
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 TEI-XML for    default:Reihe_B/42/ZNB-1987-42b-1263.pdf 
 Identifier    ZNB-1987-42b-1263 
 Volume    42 
40Author    Anton Meller, Christoph Kümmel, Mathias NoltemRequires cookie*
 Title    Monomere Iodide von o-substituierten Aryl-Gallium-und Indiumverbindungen Monomeric Iodides of o-Substituted Aryl Gallium and Indium Compounds  
 Abstract    Monomerie diiodides of 2,4,6-tri(rm -butyl)phenyl = (s-M es), 2,4,6-triisopropylphenyl = (Trip)-and 2,4-di-terf-butyl-6-methylphenyl = (D BM P)-gallium and -indium were prepared by the reaction of the lithiated aryls with MI3 (M = Ga, In) in hexane/Et20 . s-M esInI2 (1), s-M es2InI (2), s-M esGaI2 (3), s-M es2GaI (4), Trip2InI (5) and (D B M P)2InI (6) were obtained and characterized by their mass and NM R spectra (!H, 13C), and/or by elem ental analyses. An X-ray crystal structure analysis was carried out for 1. 
  Reference    (Z. Naturforsch. 51b, 107—111 [1996]; eingegangen am 6. Juni 1995) 
  Published    1996 
  Keywords    Galliumiodides, Indiumiodides, 2, 6-Disubstituted Aryl 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0107.pdf 
 Identifier    ZNB-1996-51b-0107 
 Volume    51