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1986 (263)
21Author    R.M M Ohareb, S. M. FahmyRequires cookie*
 Title    Cyanothioacetamide in Heterocyclic Synthesis: A New Approach for the Synthesis of 2-Pyridothione and 2-Pyridazinothione Derivatives  
 Abstract    Heterocyclic Synthesis, C yanothioacetam ide, Pyridazine Derivatives Cyanothioacetam ide (1) undergoes self condensation to give 4,6-diamino-3-cyano-2-pyrido-thione (2). The latter was utilised in synthesis of pyrido[2,3-c]pyrazole, pyrido[2,3-d]pyrim idine, bis-(pyridothione derivatives) through reaction with hydrazine hydrate, ethoxycarbonyl isothio-cyanate and cinnam onitrile derivatives. Also 1 undergoes self dimerisation to give 13, the latter form the pyridazine derivative on coupling with benzenediazonium chloride. 
  Reference    (Z. Naturforsch. 41b, 105 [1986]; received July 8 1985) 
  Published    1986 
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 Identifier    ZNB-1986-41b-0105 
 Volume    41 
22Author    R.R G Upta, M. Kum, Rakesh KumarRequires cookie*
 Title    Studies on Diamagnetic Susceptibility of Biologically Active Heterocycles, Part 2 Diamagnetic Susceptibilities of 4H-l,4-Benzothiazines and their Sulfones  
  Reference    (Z. Naturforsch. 41b, 110 [1986]; received July 11 1985) 
  Published    1986 
  Keywords    4H -l, 4-B enzothiazines, Sulfones, Heterocycles, Diamagnetic Susceptibility 
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 Identifier    ZNB-1986-41b-0110 
 Volume    41 
23Author    Joachim Stauff, G.Erhard StärkRequires cookie*
 Title    Chemilumineszenz von Photoprodukten polyzyklischer aromatischer Kohlenwasserstoffe und deren Carbonylverbindungen Chemiluminescence of Photoproducts of Polycyclic Aromatic H ydrocarbons and their Carbonyl Compounds  
 Abstract    During photooxidation of polycyclic arom atic hydrocarbons (PA H) products can be form ed which develop chemiluminescence on treatm ent with bases. Flash photolysis experim ents show that this is the case only after previous form ation of cation radicals, e.g. in the presence of CC14 as solvent or of e-acceptors in aprotic solvents. These radicals react with oxygen to peroxy-radicals which can combine to several kinds of peroxides. Primary and secondary peroxides are the sources of chemilum inescent activity. C hemilum inescent peroxides can also be obtained by irradiation of PA H carbonyl com pounds in protic solvents under nitrogen. It is assumed that two excited CO groups combine exceptionally with their O -atom s thus creating a peroxide bond. 24 arom atic aldehydes, ketones, dicarboxylic acid anhydrides and coum arines develop chemiluminescence after illumination with w avelengths > 320 nm with intensities varying 4 magnitudes of order. The sensitivity of the photochem ilum inescent method is sufficient to detect amounts of PA H and their CO derivatives in the ppb to ppm range. 
  Reference    (Z. Naturforsch. 41b, 113—121 [1986]; eingegangen am 15. Juli 1985) 
  Published    1986 
  Keywords    Chem ilum inescence, Photooxidation Photoreduction, Polyaromatic H ydrocarbons, Carbonyl C om pounds 
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 Identifier    ZNB-1986-41b-0113 
 Volume    41 
24Author    George Sosnovsky, Jan LukszoRequires cookie*
 Title    In the Search for New Anticancer Drugs, XVI Selective Protection and Deprotection of Primary Amino Groups in Spermine, Spermidine and Other Polyamines  
 Abstract    Sperm ine, Sperm idine, Polyam ines, Nefkens R eagent, N -Ethoxycarbonylphthalim ide Sperm idine, spermine and oth er polyam ines 1—5 were selectively protected at the term inal primary amino functions w ithout affecting the secondary amino groups using N-ethoxycarbonyl-phthalim ide (15), the N efkens' reagent. T hree representative products, 17, 18 and 20, readily underw ent acylation at the secondary amino nitrogen to give the corresponding compounds 21—26. Selective deprotection of two representative samples 22 and 25 at the primary amino function by hydrazinolysis yielded the corresponding derivatives 27 and 28 with free primary amino groups. In summary, the application of N efkens' reagent for the term inal protection of primary amino groups in various polyam ines results in a simple, efficient and selective one-step procedure using commercially available reagents. 
  Reference    (Z. Naturforsch. 41b, 122 [1986]; received July 30 1985) 
  Published    1986 
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 Identifier    ZNB-1986-41b-0122 
 Volume    41 
25Author    Irpte Iridiumphosphidtellurid, Phosphide Iridium, IrpteG Erhard Telluride, KlicheRequires cookie*
 Title    N O T IZ E N  
 Abstract    Transition M etal, Iridium , Phosphide, Telluride, Preparation IrPTe was prepared by annealing stoichiometric mixtures of IrP2 and IrTe2 in evacuated quartz tubes at 1100—1150 °C/2 days. From the lattice constants (a = 6.030(1), b = 6.131(1), c = 12.132(1) Ä) and the infrared absorption spectrum a structure similar to CoSbS (paracostibite) is concluded. 
  Reference    (Z. Naturforsch. 41b, 130—131 [1986]; eingegangen am 26. August 1985) 
  Published    1986 
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 Identifier    ZNB-1986-41b-0130_n 
 Volume    41 
26Author    Taha El-Shihi, R. Udolf, Herrm AnnRequires cookie*
 Title    A Practical Synthesis o f 2-Azidophenylisocyanide  
 Abstract    G arching, W -G erm any Z. N aturforsch. 41b, 132-133 (1986): received A ugust 14, 1985 2-Azidoaniline, Hofmann D egradation, 2-Azidophenylisocyanide, /3-Lactams 
  Reference    Z. Naturforsch. 41b, 132 (1986) 
  Published    1986 
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 Identifier    ZNB-1986-41b-0132_n 
 Volume    41 
27Author    Chu LeRequires cookie*
 Title    C L n-n^ 0  
 Abstract    d c h 3 H3C || I S t S , Scheme 1. pyrazolin-5-one (l e) as acyl derivative no thiazolid-4-one derivative was isolated. This may be explained on the basis of the strong enolisation of l e to 4 . 
  Reference    Z. Naturforsch. 41b, 134 (1986) 
  Published    1986 
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 Identifier    ZNB-1986-41b-0134_n 
 Volume    41 
28Author    Requires cookie*
 Title    Bis  
 Abstract    (oxaIato)platinate des Bis(oxamidoxim)platin: Anisotrope Festkörper mit gemischten und mit getrennten Stapeln Bis(oxalato)platinate Salts of Bis(oxamide-oxime)platinum: A nisotropie Solids with Mixed and with Segregated Stacks Helm ut Endres* und Gisela Liebich-Brudy 
  Reference    Z. Naturforsch. 41b, 137 (1986) 
  Published    1986 
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 Identifier    ZNB-1986-41b-0137 
 Volume    41 
29Author    Max Herberhold, Wolfgang JellenRequires cookie*
 Title    Neue Selen-Stickstoff-Verbindungen terf-Butyl-seleninylamin, BuTVSeO, und Di(te/*-butyI)selendiimid, Se(NBur)2 New Selenium-Nitrogen Compounds /'err-Butyl-seleninylamine, BuTSfSeO, and Di(terf-butyl)selenium D iimide, Se(NBu')2  
 Abstract    Selenium-Nitrogen C om pounds, Selenium Diimides The first seleninylamine, 'BuNSeO , was prepared from /m -butylam ine, 'B uN H 2, and SeOCl2 (3:1). The selenium diimide Se(N Bu')2 was isolated from the corresponding reaction of 'B uN H 2 and SeCl4 (6:1); it decomposes at am bient tem perature to give cyclic Se3(N Bu')2. The new compounds were characterized on the basis of their IR , 'H and l3C NMR and mass spectra. 
  Reference    Z. Naturforsch. 41b, 144 (1986); eingegangen am 30. O ktober 1985 
  Published    1986 
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 Identifier    ZNB-1986-41b-0144 
 Volume    41 
30Author    JosephG. Robe, Duc Le Van, Jürgen NientiedtRequires cookie*
 Title    Reaktive  
 Abstract    E=C(p-p);r-Systeme, VI [1] Reaktionen des Phosphaalkens F3CP=CF2 mit H-aciden Verbindungen Reactive E = C(p-p);r-Systems. VI [1] Reactions of the Phosphaalkene F3C P = C F 2 with H Acidic Com pounds 
  Reference    Z. Naturforsch. 41b, 149—161 (1986); eingegangen am 21. O ktober 1985 
  Published    1986 
  Keywords    HX Addition to F3C P = C F 2, New Chiral C F, Substituted Phosphanes Phosphaalkenes, Mass Spectra N M R Spectra 
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 Identifier    ZNB-1986-41b-0149 
 Volume    41 
31Author    H. Erbert, W. Roesky, Jörg Sundermeyer, Jürgen Schimkowiak, Thomas Gries, M. Athias, N. Oltem Eyer, GeorgeM. SheldrickRequires cookie*
 Title    Reaktionen von l,2,4-Thiadiazol-3,5-dicarbonitril mit Schwefelchloriden: Röntgenstrukturanalyse von S3(CN)4C12* AsF5 und S3(CN)8C12 Reactions of l,2,4-Thiadiazol-3,5-dicarbonitrile with Sulfur Chlorides: X-Ray Crystal Structure Analysis of S3(CN)4C12-A sFs and S3(CN )8C12  
 Abstract    The reactions between l,2,4-thiadiazol-3,5-dicarbonitrile, S (C N)4, and sulfur chlorides (SC12 and S2C12) in the presence o f Adogen® 464 (Aldrich) proceeds with formation o f S3(C N)4C12 (1) 
  Reference    Z. Naturforsch. 41b, 162 (1986); eingegangen am 18. O ktober 1985 
  Published    1986 
  Keywords    Crystal Structure, Sulfur-Nitrogen, Catalyst, Lewis Acid A dduct 
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 Identifier    ZNB-1986-41b-0162 
 Volume    41 
32Author    Peter Paetzold3, N. Orbert Finke3, PiaW. Ennek3, G. Ünther, Schmidb, R. Oland BoesebRequires cookie*
 Title    2-Boratanaphthalin-Anion als hexahapto-gebundener Ligand 2-B oratanaphthaline Anion as H exahapto-B onded Ligand  
 Abstract    l,2-D ihydro-2-boranaphthalines, 2-Boratanaphthaline M etal Coordination C om pounds From a solution o f a lithium -2-boratanaphthaline L i(X B C 9H 7), 2a (X = Ph) and 2b (X = /Pr2N), the crystalline metal derivatives F e(X B C 9H 7)2 (4a, b), (tm ed a)L i(X B C 9H 7) (5 b), and D 2R h (X B C 9H 7) (7b: D = C2H 4; 8b: 2 D = cod) can be prepared. The m etal atom s Fe and Rh are 
  Reference    Z. Naturforsch. 41b, 167 (1986); eingegangen am 15. Oktober 1985 
  Published    1986 
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 Identifier    ZNB-1986-41b-0167 
 Volume    41 
33Author    H. Erbert, W. Roesky, Jürgen Schimkowiak, Mathias Noltemeyer, GeorgeM. SheldrickRequires cookie*
 Title    Darstellung und Eigenschaften des Tribrom-cyclo-1 A6-wolfram-3,5-dithia-2,4,6-triazens Synthesis and Properties of Tribromo-cyclo-lA6-tungsten-3,5-dithia-2,4,6-triazene  
 Abstract    H eterocycle, T ungsten, X -R ay, A n ion , Bromine The m etallacycle [Br3W S2N 3] has been obtained from the reaction o f S4N 4 with W Br,. The salt [Ph4P +][Br4W S2N 3_] was formed from [Br3W S2N 3] by addition o f Ph4PBr. It crystallizes in the orthorhom bic space group Pbca with a = 1396.8(4), b = 1961.9(5), c = 2108.0(4) pm, and Z = 8. The follow ing m ean bond lengths were observed in the anion: W —N 184.2, W -B r 256.8, N —S 157.8 pm. 
  Reference    Z. Naturforsch. 41b, 175 (1986); eingegangen am 21. Oktober 1985 
  Published    1986 
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 Identifier    ZNB-1986-41b-0175 
 Volume    41 
34Author    D. Ieter Wöhrle, UweH. Ündorf, G. Ünter, Schulz-Ekloff, Erwin IgnatzekRequires cookie*
 Title    Phthalocyanines on Mineral Carriers, 2* Synthesis of Cobalt(II) and Copper(II)-phthalocyanines on y-Al20 3 and S i0 2  
 Abstract    The reaction o f metal loaded y -A l20 3 and S i 0 2 with benzene-1,2-dicarbonitrile (2) resp. 1H-isoind ole-l,3(H)diim ine (3) results in the /^-modification o f m etallized phthalocyanines (1; metals: C u(II), C o(II)). 1 is form ed with an average yield o f 4 8 —64% in uniform distribution on the carriers from the reaction with 2. The sizes o f the surface areas of the supports are not changed significantly by loading with 1. Non-uniform distribution or even unsupported crystals o f 1 are found if the synthesis is carried out with 3. 
  Reference    Z. Naturforsch. 41b, 179 (1986); received A ugust 19 1985 
  Published    1986 
  Keywords    Phthalocyanines, Mineral Carriers, A lum ina, Silica 
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 Identifier    ZNB-1986-41b-0179 
 Volume    41 
35Author    Fritz Preuss, Flarald BeckerRequires cookie*
 Title    te/*-Butylimino-ff-Organovanadium(V)-Verbindungen Darstellung und NMR-spektroskopische Untersuchungen ter/-Butylim ino-a-Organovanadium (V) Compounds Synthesis and N M R Spectroscopic Studies  
 Abstract    o-O rganovanadium (V) Com pounds, Preparation, NM R Spectra The com pounds 'C4H yN = V R (0 'C 4Hc,)2 (R = CH 3, nC4H 9, CH 2SiM e3, M es) and 'C4H 9N = V M e s,(0 'C 4H 9) have been prepared by reaction of fm -butylim inovanadium (V) chlorides with LiR; 'C4H gN = V (C H 2SiM e3)2(0 'C 4H9) and 'C4H yN = V R 3 (R = C H 2SiM e3, M es) could only be characterized by N M R spectroscopy. The 'H , l3C and MV N M R spectra are dis­ cussed; the constants o f 51V , l4N coupling have been determined. An Alkyl-und A rylverbindungen des Vana-diums(V) sind bekannt: 
  Reference    Z. Naturforsch. 41b, 185 (1986); eingegangen am 11. Oktober 1985 
  Published    1986 
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 Identifier    ZNB-1986-41b-0185 
 Volume    41 
36Author    Heinrich Lang, G. Ottfried, H. Üttner, Beate Sigwarth, U. Te, W. Eber, Laszlo Zsolnai, Ibrahim Jibril, Olli OramaRequires cookie*
 Title    Phosphiniden-, Arsiniden-und Stibiniden-Komplexe, ihre valenztautomeren Formen und Dimerisierungsprodukte Phosphinidene-, Arsinidene-and Stibinidene Complexes, Valence Tautom erism and Dimerisation Products  
 Abstract    Phosphinidene C om plexes, Arsinidene C om plexes, Stibinidene C om plexes, V alence Tautom erism , Dim erisation Products 
  Reference    Z. Naturforsch. 41b, 191 (1986); eingegangen am 15. O ktober 1985 
  Published    1986 
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 Identifier    ZNB-1986-41b-0191 
 Volume    41 
37Author    Requires cookie*
 Title    On the Nonexistence of a Simple  
 Abstract    ^-O xo-diphosphorane Involving two 1,3.5.7-Tetram ethyl-1.3.5.7-tetra-aza-4A''-phospha-spiro[3.3]heptane-2.6-dione Groupings: Preparation and Structure of a A5P —O —A5P D iphosphorane Doubly Bridged with N .N '-D im ethylurea D ietm ar Schomburg3 +, Ulrich W erm uthb und Reinhard Schmutzlerb * a G esellschaft für B iotechnologische Forschung mbH, M ascheroder W eg The reaction between the spiro-chlorophosphorane, [ 0 = C (N M e)2]2PX (X = C l), and the related trimethylsiloxy com pound (X = O SiM e3) was expected to give rise to the formation o f a ^-oxo-bis(spirophosphorane), [ [ 0 = C (N M e)2]2P]20 . Instead, an isom er o f the expected com ­ pound, with two N.N '-dim ethylurea bridges across a A5P —O —A5P bond system was obtained. The identity o f the product was established by spectroscopic means (IR , N M R . mass spectroscopy), and by a single crystal X-ray diffraction study. 
  Reference    Z. Naturforsch. 41b, 207 (1986); eingegangen am 8. Juli/17. O ktober 1985 
  Published    1986 
  Keywords    Penta-co-ordinate Phosphorus, X -R ay, Crystal Structure 
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 Identifier    ZNB-1986-41b-0207 
 Volume    41 
38Author    Z. NaturforschRequires cookie*
 Title    Über die Konfigurations-und Substituenten-Abhängigkeit der 1H-und 13C-NMR-Parameter in substituierten Verbindungen vom Typ cis- und frafis-Bis(phenyI)bis(tri-fi-butylphosphan)platin(II)  
 Abstract    1H and 13C NMR spectroscopic parameter of in the phenyl rings substituted compounds of the type cis- and rram-bis(phenyl)bis(tri-«-butylphosphane)platinum(II) are reported and discussed with respect to correlations between coupling constants especially with platinum-195 and molecu­ lar configuration and substituent effects. 
  Reference    Z. Naturforsch. 41b, 211 (1986); eingegangen am 21. Oktober 1985 
  Published    1986 
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 Identifier    ZNB-1986-41b-0211 
 Volume    41 
39Author    Hermann Poschenrieder, Hans-Dietrich StachelRequires cookie*
 Title    Synthese und Eigenschaften von 5-BenzoyItetramsäuren  
 Abstract    The synthesis of the title compounds 4a/b and their enolethers 4c/d respectively by hydrolysis of the a-methoxybenzylidene-pyrrolinones 3 is reported. Methylation by diazomethane preferential­ ly yields the benzoylpyrroles 7. Analogously, hydrolysis of the a-methoxybenzylidene- pyrrolidinone 9 followed by methylation leads to the isomeric enolethers 10b and 11. 
  Reference    Z. Naturforsch. 41b, 219 (1986); eingegangen am 18. Oktober 1985 
  Published    1986 
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 Identifier    ZNB-1986-41b-0219 
 Volume    41 
40Author    Herrn, Dr, DrRequires cookie*
 Title    Transanulare Wechselwirkung bei  
 Abstract    [m.n]Phanen, 32 [1]: Modelle für Amin-Aromaten-Exciplexe: [2](l,4)Anthraceno[2](2,6)pyridinophan-l,13-dien Transanular Interaction in [m .n]Phanes, 32 [1 ]: Models for Am ine-A rene-Exciplexes: [2](l,4)A nthraceno[2](2,6)pyridinophan-l,13-dien M atthias W. H a e n e l* 3, Birgit L intnera und D ieter Schweitzer11 a M ax-Planck-Institut für K ohlenforschung, Kaiser-W ilhelm -Platz 1, D-4330 M ülheim a .d . Ruhr b M ax-Planck-Institut für M edizinische Forschung, A bteilung M olekulare Physik, Jahnstraße 29, D -6900 H eidelberg The [2](1.4)A nthracen o[2](2,6)pyridinop han-l,13-d ien (5) and the corresponding [2.2]phane (7) were synthesized as m odels for exciplexes. The dithia[3.3]phanes (9) and (11) were prepared by cyclisation o f the dithiols 13 and 16 with the dibrom ide 19. O xidation of 9 to the disulfone 10 and vapour phase pyrolysis led to 7. Ring contraction o f 9 by S-analogous Wittig ether rearrange­ ment led to 20 which was converted to the diene 5 via oxidation to the disulfoxide 21 and pyrolytic elim ination o f m ethane sulfenic acid. A ttem pts to prepare 6 and 8 via similar routes from 11 failed. Electron absorption spectra and fluorescence spectra o f 5 and 7 are discussed in terms of n-n interaction in 5 and jt-jt interaction in 7. 
  Reference    Z. Naturforsch. 41b, 223 (1986); eingegangen am 7. Oktober 1985 
  Published    1986 
  Keywords    Cyclophanes, Electronic Interaction, Exciplex M odels U V Spectra, Fluorescence 
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 Identifier    ZNB-1986-41b-0223 
 Volume    41 
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