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1Author    Heinrich Nöth, Siegfried WeberRequires cookie*
 Title    Beiträge zur Chemie des Bors, 137 [1] A Convenient Synthesis of an Amino-Imino-Borane and its Adducts with Boron Trichloride and Boron Tribromide  
 Abstract    Über eine einfache Synthese eines Amino-imino-borans und seiner Addukte mit Bortrichlorid und Bortribromid Contribution to the Chemistry of Boron, 137 [1] 
  Reference    Z. Naturforsch. 38b, 1460—1465 (1983); eingegangen am 2. August 1983 
  Published    1983 
  Keywords    2, 2, 6, 6 -Tetramethy lpiperidino-tert-butylimino -borane, Dibromboryl-(brom-2, 2, 6, 6-tetramethylpiperidinoboryl)-ier^-butylamine, X-Ray Structure 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-1460.pdf 
 Identifier    ZNB-1983-38b-1460 
 Volume    38 
2Author    Georg Ziegler, Willi KantlehnerRequires cookie*
 Title    Orthoamides, LVI [1]. A New Method of Wide Scope for the Preparation of Aryl Formates  
 Abstract    26 are prepared by formylation of hydroxyarenes 3a-u, 25 with /V,Af-diformylacetamide (1) or triformamide (2), respectively, in fairly good yields. The reactions can be catalyzed by sodium diformamide or praseodymium(III) triflate. The thiolformate 28 was obtained analogously from 1-thionaphthol (27). 
  Reference    Z. Naturforsch. 56b, 1172—1177 (2001); received July 13 2001 
  Published    2001 
  Keywords    Aryl Formates, Formylation, Hydroxyarenes Aryl formates 4a-u, 6 
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 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-1172.pdf 
 Identifier    ZNB-2001-56b-1172 
 Volume    56 
3Author    Joachim Thiem, Hans-Peter Wessel, Pharmazeutische Forschungsabteilung, F. Hoffmann, Laroche, Co Ag, PfRequires cookie*
 Title    Synthesen von Emodinaldehyd [1] Synthesis of Emodine Aldehyde [1]  
 Abstract    By chromium trioxide oxidation and subsequent acid hydrolysis triacetyl emodine (3) was transferred to the aldehyde 9 in a two-step synthesis. In a more favourable sequence 3 was reacted to the bromomethyl derivative 4 and this solvolyzed to the citreoroseine derivative 5. A second NBS reaction gave 8 which after acid hydrolysis led to emodine aldehyde (9). This five-step process proceeded without chromatographic separation in 27% overall yield. 
  Reference    Z. Naturforsch. 40b, 422—425 (1985); eingegangen am 15. August 1984 
  Published    1985 
  Keywords    Emodine, Citreoroseine, 3-Formyl-l, 6, 8-trihydroxyanthraquinone, 'H NMR Spectra 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0422.pdf 
 Identifier    ZNB-1985-40b-0422 
 Volume    40 
4Author    N. Orbert, K. Uhna, Michael Schulten3, Roland Boeseb, Dieter BläserbRequires cookie*
 Title    Synthese und Struktur von l,3?6,8-Tetra-terf-butylcarbazol  
 Abstract    The synthesis o f 1,3,6,8-tetra-/er/-butylcarbazole (2) by the reaction o f carbazole with tert-butyl chloride in the presence o f aluminium chloride is reported. The X-ray structures o f 2 and its diethyl ether adduct are compared. The gap formed by the ter/-butyl groups in 1,8-position has been calculated and compared with that o f the supermesithyl substituent. 
  Reference    Z. Naturforsch. 46b, 1503—1508 (1991); eingegangen am 4. April 1991 
  Published    1991 
  Keywords    l, 3, 6, 8-Tetra-?m -butylcarbazole, Synthesis, X-Ray 
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 TEI-XML for    default:Reihe_B/46/ZNB-1991-46b-1503.pdf 
 Identifier    ZNB-1991-46b-1503 
 Volume    46 
5Author    Marianne Baudler, Elmar TollsRequires cookie*
 Title    Beiträge zur Chemie des Phosphors, 84 [1] 1.2.3-Trimethyl  
 Abstract    The reaction of K2(PMe)4 • 2 THF with eis-1,2-dichloroethylene yields the hitherto unknown cyclocarbaphosphanes 1,2,3-trimethyl-1,2,3-triphosphole, (PMe)3C2H2 (1), and 2,3,4,6,7,8-hexamethyl-2,3,4,6,7,8-hexaphosphabicyclo[3,3,0]octane, (PMe)6C2H2 (2). Besides, (PMe)s, (PMe)4CH2, (PMe)3C2Hi, and the new six-membered heterocycle (PMe)2(C2H2)2 are formed. The cyclocarbaphosphanes 1 and 2 were characterized by elemental analysis, mass, IR, Raman, and NMR spectra. For the bicyclic compound 2 two diastereomers were obtained and separated. They differ in the position of the methine hydrogens and of the methyl substituents (eis-2 and trans-2). Compound 2 is also produced in the reaction of K2(PMe)4 • 2 THF with £rans-l,2-dichloroethylene whereas with 1,1,2,2- tetrachloroethane mainly (PMe)s is formed. In 1 and in each of thefive-memberedrings of cis-2 and trans-2 the methyl substituents at adjacent phosphorus atoms are situated on opposite sides of the ring. 
  Reference    Z. Naturforsch. 33b, 691—697 (1978); eingegangen am 24. April 1978 
  Published    1978 
  Keywords    3-Trimethyl-1, 2, 3-triphosphole, (PMe)3C2H2, and 2, 3, 4, 6, 7, 8-Hexamethyl-2, 3, 4, 6, 7, 8-hexaphosphabicyclo[3, 3, 0]oetane, (PMe)6C2H2 l, 2, 3-Trimethyl-l, 2, 3-triphosphole, l, 2, 3-Trimethyl-cyclo-4, 5-dicarba-4-en-l, 2, 3-triphosphane, Hexaphosphabicyclo[3, 3, 0]octanes (eis and trans), Cyclocarbaphosphanes, Heterocyclophosphanes 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0691.pdf 
 Identifier    ZNB-1978-33b-0691 
 Volume    33 
6Author    Christian Reichardt, Wolfgang ScheibeleinRequires cookie*
 Title    Synthesen mit aliphatischen Dialdehyden, XXVII [1] Eine "non-template"-Synthese zur Darstellung metallfreier 1.4.8.11-Tetraaza [14] annulen-Derivate Syntheses with Aliphatic Dialdehydes, XXVII [1] A Non-Template Synthesis for the Preparation of Metal-Free 1,4,8,11-Tetraaza[14]annulene Derivatives  
  Reference    Z. Naturforsch. 33b, 1012—1015 (1978); eingegangen am 2. Mai 1978 
  Published    1978 
  Keywords    6, 3-Disubstituted l, 4, 8, ll-Tetraaza[14]annulenes, Non-Template Synthesis 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-1012.pdf 
 Identifier    ZNB-1978-33b-1012 
 Volume    33 
7Author    Giorgio Malesani, Ugo Quintily, Gianfranco ChiarelottoRequires cookie*
 Title    345 G. Malesani et al. * Keto-enol Tautomerism in 4,7-Dioxo-4,5,6,7-tetrahydroindoles  
 Abstract    The tautomeric equilibria of 4,7-dioxo-4,5,6,7-tetrahydroindoles have been investigated by nuclear magnetic resonance spectroscopy. Proton chemical shift measurements have been made for a series of alkyl or arylindole derivatives, and equilibrium constants ([enol]/[keto]) have been determined. The effect of solvent on the enol-keto equilibria has been studied. 
  Reference    Z. Naturforsch. 34b, 333—338 (1979); received September 8 1978 
  Published    1979 
  Keywords    Keto-enol Tautomerism, 4, 7-Dioxo-4, 5, 6, 7-tetrahydroindoles, 4, 7-Dihydroxyindole Derivatives 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0333.pdf 
 Identifier    ZNB-1979-34b-0333 
 Volume    34 
8Author    MichaelA. Rm Brecht, W. Alter Maringgele, A. Nton Meller, M. Athias, N. Oltem Eyer, GeorgeM. SheldrickRequires cookie*
 Title    Synthesen und Eigenschaften von Piperidin-N-oxyboranen Synthesis and Properties of Piperidine-N-oxyboranes  
 Abstract    Piperidine-N-oxyboranes and 2,2,6,6-Tetram ethylpiperidine-N -oxyboranes have been p re­ pared starting from halogenoboranes by three methods: a) By reaction with N-hydroxypiperidine and triethylam ine; b) by cleavage of the Si —O-bond in piperidine-N-oxy-trim ethylsilanes and c) by reaction with metallated piperidine-N-oxy compounds. Diboryloxides and diborylamides, resp., are obtained upon reaction of piperidine-N-oxy-brom oboranes with hexamethyldisiloxane and hexamethyldisilazane. Steric influences upon reac­ tivity and spectroscopic properties are discussed. The com pounds are characterized by elem ental analysis, mass and NMR spectroscopy ('H , "B , 13C , 14N , 29Si). A n X-ray analysis has been carried out for tris(2,2,6,6-tetram ethylpiperidine-l-oxy)borane 13. 
  Reference    Z. Naturforsch. 40b, 1113—1122 (1985); eingegangen am 24. April 1985 
  Published    1985 
  Keywords    Piperidine-N-oxyboranes, 2, 2, 6, 6-Tetram ethylpiperidine-N -oxyboranes, Diboryloxides, Diborylamides, Piperidine-N-oxysilanes 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-1113.pdf 
 Identifier    ZNB-1985-40b-1113 
 Volume    40 
9Author    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 
10Author    George Sosnovsky, Maria KoniecznyRequires cookie*
 Title    Utilization of the Sterically Hindered Base, 4-Hydroxy-2,2,6,6-tetramethylpiperidine, as a Hydrogen Halide Acceptor  
  Reference    Z. Naturforsch. 33b, 792—796 (1978); received March 17 1978 
  Published    1978 
  Keywords    Dehydrobromination, Preparation of Alkenes, Quaternization of Amines, Sterically Hindered Bases, 4-Hydroxy-2, 2, 6, 6-tetramethylpiperidine 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0792.pdf 
 Identifier    ZNB-1978-33b-0792 
 Volume    33 
11Author    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 
12Author    Borislav Bogdanović, Richard Goddard, Peter Göttsch, Carl Krüger, Klaus Schlichte, Yi-Hung TsayRequires cookie*
 Title    7) 3 -Allylmetall-Schwefel-Cluster des Nickels, Palladiums und Platins r/ 3 -Allyl Metal Sulfur Cluster Compounds of Nickel, Palladium, and Platinum  
  Reference    Z. Naturforsch. 34b, 609—613 (1979); eingegangen am 14. Dezember 1978 
  Published    1979 
  Keywords    Trigonal Prismatic Metal Sulfur Cluster, -Allyl Compounds of Ni, Pt, Pd, l, 6, 6a-Trithiapentalene, X-ray 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0609.pdf 
 Identifier    ZNB-1979-34b-0609 
 Volume    34 
13Author    New Monocyclic Acyloxyfluoroboranes, Herbert Binder, Walter Matheis, Hans-Jörg Deiseroth, Han Fu-Son, ProfH. Dr, W. Binder, MatheisRequires cookie*
 Title    Über neue monocyclische Acyloxyfluoroborane 2.2.6.6-Tetrafluoro-1.4-dialkyl-1.3.5-trioxa-1.6-diboracyclohexene: Darstellung, Molekül-und Kristallstruktur  
 Abstract    Acyloxyfluoroboranes Trimeric alkoxydifluoroboranes (F2BOR)3 (2) react with organic acid anhydrides by substitution of a ring group OR forming monocyclic acyloxyfluoroboranes of the type 2,2,6,6-tetrafluoro-l,4-dialkyl-l,3,5-trioxa-2,6-diboracyclohexene (3). The X-ray crystal structure determination of 3a shows two conformational isomers: two planar and two non-planar six-membered rings are present in the unit cell. The ring conformation is influenced by weak intermolecular H — F interactions. 
  Reference    Z. Naturforsch. 38b, 554—558 (1983); eingegangen am 15. November 1982/26. Januar 1983 
  Published    1983 
  Keywords    6, 6-Tetrafluoro-l, 4-dialkyl-l, 3, 5-trioxa-2, 6-diboracyclohexenes: Synthesis, Molecular and Crystal Structure 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0554.pdf 
 Identifier    ZNB-1983-38b-0554 
 Volume    38 
14Author    Armin Traub, Hans GeigerRequires cookie*
 Title    Nachweis  
 Abstract    von 2.5.7.3/.4,-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 
15Author    Franz Dallacker, Bodo Holtmann, Wim CoerverRequires cookie*
 Title    Derivate des 1.3-BenzdioxoIs, 48 [1] Darstellung und Reaktionen von substituierten 1.3-Benzdioxol-4.7-cliinonen Derivatives of 1,3-Benzdioxoles, 48 [1] Preparation and Reactions of l,3-Benzdioxole-4,7-quinones  
  Reference    Z. Naturforsch. 38b, 392—397 (1983); eingegangen am 6. Oktober 1982 
  Published    1983 
  Keywords    l, 3-Benzdioxol-4, 7-chinon, 6, 7-Dimethyl-naphtho[2, 3-d]-l, 3-dioxol-4, 9-chinon, 6-Hydroxy-naphtho[2, 3-d]-l, 3-dioxol-4, 9-chinon 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0392.pdf 
 Identifier    ZNB-1983-38b-0392 
 Volume    38