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21Author    Boris Janistyn, M. Artha StockerRequires cookie*
 Title    Enzymatischer Abbau von [Ring B-U-14C]-5.7.3'.4'-Tetrahydroxy- flavanon-7-O-glucosid zu 5.7-Dihydroxychromon-7-0-glucosid und [Ring-U-14C]-1.2.4-Trihydroxybenzol mit einem zellfreien Extrakt von Mentha longifolia Enzymatic D egradation of [Ring B-U-14C] -S ^S ^'-tetrahydroxyflavanone-T -O - glucoside to 5,7-Dihydroxychromone-7-0-glucoside and [Ring-U-14C]-1,2,4-trihy- droxybenzene with a Cell Free System from M entha longifolia  
  Reference    (Z. Naturforsch. 31c, 408 [1976]; eingegangen am 12. April 1976) 
  Published    1976 
  Keywords    Flavanone Degradation, [Ring B-U-14C]-5, 7, 3', 4'-tetrahydroyflavanon-7-0-glucoside, Chromone Formation 
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 TEI-XML for    default:Reihe_C/31/ZNC-1976-31c-0408.pdf 
 Identifier    ZNC-1976-31c-0408 
 Volume    31 
22Author    Helga Wittmann, Hossein Taleban, Reinhard HerzogRequires cookie*
 Title    Synthesen von Heterocyclen, 199 1 Spiro-lactone aus 1.2.3-Trioxo-2.3-dihydro-phenalen sowie 2.3.4-Trioxo- und Anthranilsäure The Chemistry of Vicinal Triketones, VIII 1 Spiro Lactones from l,2,3-Trioxo-2,3-dihydro-phenalene and 2,3,4-Trioxo-l,2,3,4-tetrahydro-quinolines with Anthranilic Acid  
 Abstract    l,2,3-Trioxo-2,3-dihydro-phenalene (PT) and l,2,3-trioxo-2,3,6,7-tetrahydro-l H, 5H- benzo[ij]quinolizine (TMCHi) react with anthranilic acid (AS) primarily to give the spirolactones la-lb, which are thermically rearranged to the corresponding benzoxazine carboxylic acids 2 a - 2 b . l-phenyl-2,3,4-trioxo-l,2,3,4-tetrahydro-quinoline (PHCHi) reacts with AS yielding the spirolactone 1 c, which decomposes upon heating. 
  Reference    (Z. Naturforsch. 31b, 1407—1409 [1976]; eingegangen am 5. Juli 1976) 
  Published    1976 
  Keywords    Anthranilic Acid, l, 2, 3-Trioxo-2, 3-dihydro-phenalene, 2, 3, 4-Trioxo-l, 2, 3, 4-tetrahydro-quinoline, Spirolactone, Benzoxazine Carboxylic Acid 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-1407.pdf 
 Identifier    ZNB-1976-31b-1407 
 Volume    31 
23Author    Klaus Burger, UlrikeWolfgang Schöntag, WassmuthRequires cookie*
 Title    Überraschende Selektivitäten bei der Cycloaddition von a ,ß -ungesättigten Aldehyden und Ketonen an trifluormethyl-substituierte Hetero-1.3 -diene Unexpected Selectivity Phenomena in Cycloaddition Reactions of a,/?-Unsaturated Aldehydes and Ketones to Trifluoromethyl Substituted Hetero-l,3-dienes  
  Reference    Z. Naturforsch. 37b, 1669—1671 (1982); eingegangen am 23. Juli 1982 
  Published    1982 
  Keywords    [4 +2]-Cycloaddition Reactions, 2, 6-Dihydro-1, 3, 5-dioxazines, 2, 6-Dihydro-1, 3, 5-oxathiazines, 2, 3 -Dihydro -6 H -oxadiazines 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-1669_n.pdf 
 Identifier    ZNB-1982-37b-1669_n 
 Volume    37 
24Author    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 
25Author    Michael Farkens, ThomasG. Meyer, Ion Neda, R.Alf Sonnenburg, Christian Müller, AxelK. Fischer, PeterG. Jones, Reinhard SchmutzlerRequires cookie*
 Title    Zur Chemie der l,3,5-Triaza-2-phosphinan-4,6-dione. Teil VI*. Darstellung von l,3>5-Triaza-2 A3  
 Abstract    , l,3,5-Triaza-2 A4-und 1,3,5-T riaza-2 A5-phosphinan-4,6-dionen Chemistry o f the l,3,5-Triaza-2-phosphinane-4,6-diones. Part VI. Synthesis o f l,3,5-Triaza-2^3-, 1,3,5-Triaza-2A4-and l,3,5-Triaza-225-phosphinane-4,6-diones The reactions o f 1,3,5-trimethylbiuret with dicyclohexylam inodichlorophosphine and with pyrrolidinodichlorophosphine furnished the triazaphosphinane-diones 1 and 2. Oxidation 
  Reference    Z. Naturforsch. 49b, 145—164 (1994); eingegangen am 29. Juli 1993 
  Published    1994 
  Keywords    1, 3, 5-Triorgano-Substituted l, 3, 5-Triaza-2-phosphinan-4, 6-diones, Oxidation Reactions, N M R Spectra, M ass Spectra, X -R ay 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0145.pdf 
 Identifier    ZNB-1994-49b-0145 
 Volume    49 
26Author    Bettina Eichhorn, Heinrich NöthRequires cookie*
 Title    New Diazasilaphosphetidines and their Precursors  
 Abstract    A series of aminosilanes (R 'H N bSiR : have been prepared. In case of bulky substituents R' the aminolysis of Ph^SiCb stops at the (R'HN)ClSiPh2 stage. Replacement of the Cl atom is achieved with LiNHR' which allows the synthesis o f mixed bisaminosilanes (R'HN)(R"HN)SiPh2. The X-ray structures of three of these compounds have been determined. There are no intermolecular N-H -N hydrogen bonds in these compounds in the solid state. Several 1,3,2,4-diazaphosphetidines have been synthesized using bis(N-lithioamino)silanes and bis(N-lithioamino)phosphanes . Amongst these the heterocycle 18 possesses an almost planar four membered N iSiP ring system. 
  Reference    Z. Naturforsch. 55b, 352—360 (2000); received January 18 2000 
  Published    2000 
  Keywords    Bis(monoorganylamino)diorganylsilanes, 1, 3, 2, 4-Diazasilaphosphetinides 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0352.pdf 
 Identifier    ZNB-2000-55b-0352 
 Volume    55 
27Author    Florian Breitsameter, Peter Mayer, Alfred SchmidpeterRequires cookie*
 Title    Die Kondensation von Ylidylchlorphosphanen mit Phosphanen und Bis(diphenylphosphanyl)methan und -amin The Condensation o f Ylidyl Chlorophosphines with Phosphines and Bis(diphenylphosphino)methane and -amine  
 Abstract    Ylidyl chlorophosphanes 1 and dichlorophosphanes 2 react with trimethylsilyl phosphanes to yield the ylidyl diphosphanes 3, 4,5, 7 and the 2-ylidyl triphosphanes 8. From the reaction of compounds 1 with lithium diphosphanyl amide and diphosphanyl methanide result the ylidyl diphosphonium ylides 11 and ylidyl diphosphinimines 13. The former rearrange to give the ylidyl triphosphanyl methanes 12. The chloromethyl diphosphinimine 13c enters a cyclization to give the 1,2,3,5-azatriphosphole derivative 14, the structure of which has been solved by X-ray analysis. From the reaction of ylidyl bis(chlorophosphanes) 17 and 20 with the same reagents the 1,2,4,5-tetraphosphinine derivative 18 and the 1,2,3,5,6-azatetraphosphinine derivatives 19 and 21 are obtained. 
  Reference    Z. Naturforsch. 55b, 519—526 (2000); eingegangen am 21. Februar 2000 
  Published    2000 
  Keywords    Phosphonium Ylides, Diphosphanes, 1, 2, 3, 5-Azatriphospholes 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0519.pdf 
 Identifier    ZNB-2000-55b-0519 
 Volume    55 
28Author    M.S S A A Haw AliRequires cookie*
 Abstract    The synthesis and antimicrobial activity of a series of the title thiones were examined. Reaction of such thiones with hydrazonoyl halides, resulted in ring transformation to give 5-acylhydrazono derivatives of 1,3,4-thiadiazoles. The mechanisms of the studied reactions are discussed. 
  Reference    Z. Naturforsch. 55b, 546—552 (2000); received February 4. 2000 
  Published    2000 
  Keywords    Ring-Chain Tautomerism Heterocyclic Ring Transformation, 1, 3, 4-Thiadiazoles 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0546.pdf 
 Identifier    ZNB-2000-55b-0546 
 Volume    55 
29Author    Z. NaturforschRequires cookie*
 Title    Long Chain Cinnamoic Acid Esters from Daphne oleoides  
 Abstract    N isa r U lla h 3, S. A . Q u re s h ib, S aee d A n w a rb, A b d u l M a lik c, an d E rn s t H a s lin g e r3 Two new natural products, tridecyl and undecyl 3,4-dihydroxycinnamate, were isolated from the chloroform soluble fraction of the whole plant of Daphne oleoides. Their structures were established on the basis of modern spectroscopic techniques including 2D NMR. 
  Reference    Z. Naturforsch. 55b, 982—984 (2000); received April 13 2000 
  Published    2000 
  Keywords    3, 4-Dihydroxycinnamoic Acid Esters, Thymelaeaceae, Daphne oleoides 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0982.pdf 
 Identifier    ZNB-2000-55b-0982 
 Volume    55 
30Author    Klaus-MichaelW. Eltring, W. Olfgang BarzRequires cookie*
 Title    Degradation of 3,9-Dimethoxypterocarpan and Medicarpin by Fusarium proliferatum  
 Abstract    The degradation o f 3,9-dimethoxypterocarpan was investigated in selected strains of Fusarium. Fusarium proliferatum (/'. e. Gibberella fujikuroi (SAW)WR) degrades this substrate via 3-meth-oxy-9-hydroxypterocarpan, 3,9-dihydroxypterocarpan and 2',4',7-trihydroxyisoflavan. During degradation by this organism medicarpin is first demethylated to 3,9-dihydroxypterocarpan. 
  Reference    Z. Naturforsch. 35c, 399—405 (1980); received March 10 1980 
  Published    1980 
  Keywords    Phytoalexins, 3, 9-Dimethoxypterocarpan, Medicarpin, Fusarium, Degradation, Demethylation 
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 TEI-XML for    default:Reihe_C/35/ZNC-1980-35c-0399.pdf 
 Identifier    ZNC-1980-35c-0399 
 Volume    35 
31Author    Hamako Obata-Sasamoto, Atsushi Komamine, Koshi SaitoRequires cookie*
 Title    Biosynthesis of 3-Carboxy-6,7-dihydroxy-l, 2,3,4-tetra- hydroisoquinoline and l-Methyl-3-carboxy-6,7-dihydroxy-l, 2,3,4- tetrahydroisoquinoline in a Callus Culture of Stizolobium hassjoo  
 Abstract    dl-[/?-14C] 3,4-Dihydroxyphenylalanine (DOPA), [2-14C]pyruvate and [2-14C]acetate were ad­ ministered to a callus culture o f S. hassjoo and incorporation of the radioactivity into 3-carboxy-6,7-dihydroxy-1,2,3,4-tetrahydroisoquinoline (I) and l-methyl-3-carboxy-6,7-dihydroxy-1,2,3,4-tetrahydroisoquinoline (II) was examined. Incorporation of radioactivity from labelled DOPA into I and II, and from acetate into I were observed, while that from pyruvate into I and II and from acetate into II were hardly detected. The biosynthetic pathways o f I and D were discussed. 
  Reference    Z. Naturforsch. 36c, 921 (1981); received August 21 1981 
  Published    1981 
  Keywords    Stizolobium hassjoo, Biosynthesis, 3-Carboxy-6, 7-dihydroxy-1, 2, 3, 4-tetrahydroisoquinoline, 1 -Methyl-3-carboxy-6, 7-dihydroxy-1, 2, 3, 4-tetrahydroisoquinoline, Callus Culture 
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 TEI-XML for    default:Reihe_C/36/ZNC-1981-36c-0921.pdf 
 Identifier    ZNC-1981-36c-0921 
 Volume    36 
32Author    A. O., W.J SRequires cookie*
 Title    Axial Preference of Methylthio Substituent in Dioxaphosphorinanyl Ring System  
 Abstract    The spatial disposition of a 2-methvlthio group in the 4-m ethyl-1,3,2-dioxaphosphorin­ anyl ring system was studied by stereochemical correlation, X H, 13C and 31P NMR. It has been established that a CH3S-group prefers an axial orientation much more strongly than does a m ethoxy group. 
  Reference    (Z. Naturforsch. 30b, 430—436 [1975]; received February 4 1975) 
  Published    1975 
  Keywords    ) 2-Methylthio-l, 3, 2-dioxaphosphorinans, Synthesis, Spectral Characteristics, Conformation 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0430.pdf 
 Identifier    ZNB-1975-30b-0430 
 Volume    30 
33Author    Krystyna Lesiak, WojciechJ. StecRequires cookie*
 Title    The Stereochemistry of P-N Bond Cleavage in the Staudinger -Wittig-type Reaction of 2-Anilido-3,4-dimethyl-5-phenyl-l,3,2-oxazaphospholidine-2-thiones  
 Abstract    Both isomers of 2-anilido-3,4-dimethyl-5-phenyl-l,3,2-oxazaphospholidine-2-thiones (2 a and 2 b) derived from (—)ephedrine were obtained and converted to corresponding 2-thiomethyl derivatives (3 a and 3 b). The Staudinger-Wittig-type reaction of P-N bond cleavage was found to proceed with full retention of configuration at P-atom involved into five-membered ring system. 
  Reference    Z. Naturforsch. 33b, 782—785 (1978); received March 28 1978 
  Published    1978 
  Keywords    1, 3, 2-Oxazaphospholidines, (—)Ephedrine, Thioanilides, Thioesters, Stereochemistry 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0782.pdf 
 Identifier    ZNB-1978-33b-0782 
 Volume    33 
34Author    Markus Wieber, Christian Burschka, Ulrich BaudisRequires cookie*
 Title    Darstellung und Molekülstruktur von 2-Methylthio-l,3,2-benzodithiastibol Preparation and X-ray Structure of 2-Methylthio-l,3,2-benzodithiastibole  
 Abstract    Starting with SbCl3 and 1,2-benzenedithiol, one can easily obtain heterocyclic 2-chloro-1,3,2-benzodithiastibole [1], which, without iso-lation, can be treated with a solution of sodium methanethiolate to yield 2-methylthio-1,3,2-benzodithiastibole. Yellow crystals were obtain-ed by recrystallization from acetonitrile. The compound was found to be monomeric in ben-zene solution. The crystal structure was solved by means of X-ray diffraction methods and could be refined to an .R-value of 0.03 with 870 independent reflections observed. The monoclinic unit cell contains 4 formula units, the space group is P2i/c. The structure can be compared with that of 2-methoxi-l,3,2-benzodioxastibole, a prelimi-nary report of which has been given [2]. The compounds are, however, not isomorphous. Interactions between neighbouring molecules in the thiastibole seem to be significantly weaker than in the corresponding oxygen compound. Verbindungen des Typs R-M<^j^>R', M = P, As, 
  Reference    Z. Naturforsch. 33b, 1051—1052 (1978); eingegangen am 2. Juni 1978 
  Published    1978 
  Keywords    2-Methylthio -1, 3, 2 -benzodithiastibole, Preparation, X-ray 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-1051_n.pdf 
 Identifier    ZNB-1978-33b-1051_n 
 Volume    33 
35Author    El Sebai, A. Ibrahim, S. A. Shams, El Dine, FaridS G Soliman, IbrahimM. LaboutaRequires cookie*
 Title    Synthesis of 5,6-Diaryl-l,2,4-triazines  
 Abstract    The synthesis of 6-(4-methoxyphenyl)-5-phenyl-3-oxo-2,3-dihydro-I,2,4-triazine (5a) from 4-methoxybenzoin, 4-methoxybenzil, or 4-methoxybenzoin semicarbazone and semi-carbazide hydrochloride is reported. The condensation of 4-methoxybenzil with thiosemi-carbazide yielded 6-(4-methoxyphenyl)-5-phenyl-3-thioxo-2,3-dihydro-I,2,4-triazine (5b) which was converted to its 3-oxo analogue 5 a with acetic anhydride. Reduction of 5 a and 5 b with zinc and aqueous acetic acid led to the corresponding 2,3,4,5-tetrahydro-1,2,4-triazines 6 a and 6b, respectively. Oxidation of 5 b with iodine in sodium carbonate solution afforded bis [6-(4-methoxyphenyl)-5-phenyl-l,2,4-triazin-3-yl]disulphide (7). Analogous triazines were prepared by condensing 3,3'-diiodobenzil with semicarbazide hydrochloride or thiosemicarbazide. 
  Reference    Z. Naturforsch. 33b, 1503—1507 (1978); received July 24 1978 
  Published    1978 
  Keywords    4-Methoxybenzoin, 3, 3'-Diiodobenzil, Semicarbazide, Thiosemicarbazide, Condensation Reactions 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-1503.pdf 
 Identifier    ZNB-1978-33b-1503 
 Volume    33 
36Author    Peter Paetzold, Günther SchimmelRequires cookie*
 Title    ungesättigter Stickstoffbasen Boration Reactions with the N-Oxides and m-Imines of Unsaturated Nitrogen Bases  
 Abstract    -Dipolar reagents with an unsaturated CNO-or CNN-skeleton undergo 1,3-organo-boration by triorganoboranes. On the other hand, the unsaturated NNO-skeletons in azoxybenzene or nitrous-oxide are reduced to the corresponding NN-fragment by trialkyl-boranes. The 1,3-addition of aminoborane Cl2BNMe2 to the aldimineoxide PhHC = NMe-0 represents one of the rare examples of analogous reactivity of BN-and CC-double bonds. O-Borylhydroxylamines PhHCR-NMe-OBR2 are reduced by BR'3 to PhHCR-NMe-BR'2 and R'0-BR2. Similar reduction products are isolated from liquid-phase thermolysis of PhHCEt-NMe-OBEt2 (16), whereas gas-phase thermolysis of 16 gives PhCH = NMe, (EtBO)3, and C4HI0. 
  Reference    Z. Naturforsch. 35b, 568—577 (1980); eingegangen am 6. Dezember 1979 
  Published    1980 
  Keywords    O-Borylhydroxylamines, Borylhydrazines, 2-Borylhydrazones, Organoboration, Aminoboration 1, 3 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0568.pdf 
 Identifier    ZNB-1980-35b-0568 
 Volume    35 
37Author    Richard Goetze, Heinrich NöthRequires cookie*
 Title    Zur Kenntnis von 1.3.2-Dithiaborolen [2] Contributions to the Chemistry of Boron, 112 [1] 1,3,2-Dithiaboroles [2]  
 Abstract    Several methods were used to prepare a series of boron substituted 1,3,2-dithiaborols. The NMR data of this new class of compounds indicate in comparison to 1,3,2-dithia-borolanes, that the heterocycle can be looked at as a 6 jt-electron system. A high degree of analogy in the mass spectrometric fragmentation of dithiaborolanes and dithiaborols exists, however, the parent ion of 2-methyl dithiaborol is more stable than that of the saturated analogon. 
  Reference    Z. Naturforsch. 35b, 1212—1221 (1980); eingegangen am 30. Januar 1980 
  Published    1980 
  Keywords    1, 3, 2 -Dithiaboroles, n B NMR Spectra, 13 C NMR Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1212.pdf 
 Identifier    ZNB-1980-35b-1212 
 Volume    35 
38Author    Rosalinda Contreras, Bernd WrackmeyerRequires cookie*
 Title    Anwendung der 11 B-NMR-Spektroskopie zur Untersuchung von Hydroborierungen, II [1] Hydroborierung von 1.5-Cyclooctadien mit Boran in Tetrahydrofuran Application of n B NMR Spectroscopy to the Study of Hydroboration, II [1] Hydroboration of 1,5-Cyclooctadiene with Borane in Tetrahydrofurane  
 Abstract    The existence of various intermediates in the hydroboration of 1,5-cyclooctadiene with borane in tetrahydrofurane (BH3-THF) is revealed by n B NMR spectroscopy. The presence of the THF adduct of 9-borabicyclo[3,3,l]nonane in solutions of the dimer in THF is proved for the first time, and the importance of the adduct in accelerating exchange reactions shown by U B NMR spectroscopy. 
  Reference    Z. Naturforsch. 35b, 1236—1240 (1980); eingegangen am 13. Juni 1980 
  Published    1980 
  Keywords    Hydroboration, 9-Borabicyclo[3, 3, l]nonane, U B NMR Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1236.pdf 
 Identifier    ZNB-1980-35b-1236 
 Volume    35 
39Author    Lothar Weber, Dietmar WewersRequires cookie*
 Title    ÜbergangsmetaU-Schwefelylid-Komplexe, XII [1] ?7 5 -Thiacyclohexadienyl-l-oxid als Ligand in neutralen Halogenomolybdän-und Halogenowolframkomplexen Transition Metal Sulfur Ylide Complexes, XII [1] ?y 5 -Thiacyclohexadienyl-l-oxide as a Ligand in Neutral Halide Complexes of Molybdenum and Tungsten  
 Abstract    The organometallic anion in tetraethylammonium-tricarbonyl(3,5-diphenylthiacyclo-hexadienyl-1-oxide)molybdate and its tungsten analogue can be halogenated by treatment with iodine, C5H5N • Br2, and I,I-dichloroiodobenzene to yield neutral [7?5.C5H3(C6H5)2SO]M(CO)3X complexes (M = Mo, W; X = Cl, Br, I). Weitere neutrale Komplexe des r/ 5 -Thiacyclohexa-dienyl-l-oxid-Liganden sollten durch Halogenie-rungsreaktionen an 2, 3 und 4 zugänglich sein. Die Ligandenstärke des Heterocyclus sowie die Nucleo-philie von 2, 3 und 4 werden verglichen mit bekann-ten ?7 5 -Liganden wie (T^-CSHS)-und deren Tri-carbonylmetallat-Ionen [(jf-C5H5)M(CO)3]-(M = Cr, Mo, W). Präparative Ergebnisse Die Iodierung von 3 und 4 in Form ihrer Tetra-ethylammoniumsalze gelingt in CH2C12-Lösung durch Umsetzung mit äquivalenten Mengen Iod bei 0 °C (Gl. (2)). Der Verlauf der Reaktion ist IR-spektroskopisch im v(CO)-Bereich leicht zu ver-folgen. Ähnliches gilt für die Bromierung. Jedoch wird hier die Verwendung des bequem ab wägbaren festen Pyridin-Bromaddukts CsHsN-B^ der des freien Halogens vorgezogen (Gl. (3)). Bei der Um-setzung von äquivalenten Mengen an I.I-Dichlor-iodbenzol und 3 bzw. 4 in CH2CI2 werden die entsprechenden Chlorokomplexe erhalten (Gl. (4)). Die Halogenierung des Chromderivates 2 gelang unter analogen Bedingungen nicht. Die so erhaltenen Produkte sind die ersten neutra-len Molybdän-und Wolframkomplexe, die den rf>-Thiacyclohexadienyl-l-oxid-Liganden tragen. Sie stellen ockergelbe bis orangegelbe diamagnetische Feststoffe dar, die kurzzeitig unzersetzt an der Luft gehandhabt werden können. Sie lösen sich gut in CH2CI2 und CHCI3, weniger gut in Aceton, THF, Toluol und Ether und sind in gesättigten Kohlen-wasserstoffen unlöslich. Die Lösungen erleiden bei 
  Reference    (Z. Naturforsch. 37b, 68—72 [1982]; eingegangen am 10. September 1981) 
  Published    1982 
  Keywords    3, 5-Diphenylcyclohexadienyl-l-oxide, Halogenation, Molybdenum and Tungsten Complexes 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-0068.pdf 
 Identifier    ZNB-1982-37b-0068 
 Volume    37 
40Author    Hans-Ulrich Höfs, Rüdiger Mews, Mathias Noltemeyer, GeorgeM. Sheldrick, Martin Schmidt, Gerald Henkel, Bernt KrebsRequires cookie*
 Title    Reactions of Fluorinated Nitriles with Sulphur(II) Chlorides; Crystal Structure of 2,4,6-Tris(difluorosulphoximido)-l,3,5-triazene at 170 K  
 Abstract    The addition of CF3SC1 (2) to the fluorinated nitriles RfCN[Rf = CF3 (3), NSF2 (4), NSOF2 (5)] leads to N-perfluoromethanesulphenyl-formylimidoylchlorides CF3S-N = C(C1)/?/ (6, 11, 12). From the reactions of SC12 (1) with (3) and (5), which yielded the N-sulphenyl-chlorides C1S-N = C(C1)-R/ (7, 13), it proved possible also to isolate the oxidation product [CF3CC12NSC12 (8)] and an oligomer of the nitrile [(NCNSOF2)3 (14)]. Dechlorination of 7 with Hg gives the corresponding di-and tri-sulphides (CF3C(Cl) = N-)2Sa; (9, 10, x — 2, 3). Crystals of (14) are triclinic with a = 1133.6(5), b = 1332.6(5), c = 1715.1(8) pm, a = 109.31(3), ß = 105.30(3), y = 97.84(3)° at 170 K, Z = 8, space group P I. The structure was refined to R = 0.028 for 8290 diffractometer data with F > 4cr(F). The four crystallo-graphically independent molecules adopt similar unsymmetrical conformations. N-Sulphenylacetimidoyl halides of the type RC(X)=N-S-Y are important in preparative chem-istry for several reasons: (a) When Y is a halogen, it may be readily exchanged, leading to a chemistry analogous to that of the perhaloalkylsulfenylhalides RhaiSCl [1, 2]. Examples of such substitution reac-tions have already been reported [2, 3], (b) When the substituent X on the triply-coordinated carbon is a halogen, the -M effect of the imino-nitrogen facilitates nucleophilic attack. Hard nucleophiles (fluoride, alcohols, amines) tend to replace X [4], soft nucleophiles the sulphur-substituent Y. (c) The >C=N-S-system may be regarded as a shortened diene, in which the second double bond is replaced by the oxidisable sulphur atom; instead of the usual 1,4-addition this results in 1,3-addition with simul-taneous oxidation of the sulphur [5]. One of the simplest examples of this class of com-pounds , chlorosulphenylchloroformylimidoylchloride may be prepared in several ways; the synthesis [6] from C1CN and SC12 opens a general route to the N-sulphenylimidoyl derivatives [4, 7-9]: C1CN + SC12 C1S-N=CC12 1 RCN + R'SCl -> R'S-N=CC1R 2 * Reprint requests to Prof. R. Mews. 0340-5087/83/0400-0454/$ 01.00/0 We report here an investigation of the corresponding addition of CF3SCI and SC12 to the fluorinated nitriles N = C-CF3, N = C-NSF2 and N = C-NSOF2. Experimental 
  Reference    Z. Naturforsch. 38b, 454—459 (1983); eingegangen am 8. November 1982 
  Published    1983 
  Keywords    Crystal Structure, Perfluoromethanesulphenylformylimidoylchlorides, N-Sulphenylchlorides, 1, 3, 5 -Triazenes 
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 Identifier    ZNB-1983-38b-0454 
 Volume    38