| 21 | Author
| R.M M Ohareb, S. M. Fahmy | Requires 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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| default:Reihe_B/41/ZNB-1986-41b-0105.pdf | | | Identifier
| ZNB-1986-41b-0105 | | | Volume
| 41 | |
24 | Author
| George Sosnovsky, Jan Lukszo | Requires 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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| default:Reihe_B/41/ZNB-1986-41b-0122.pdf | | | Identifier
| ZNB-1986-41b-0122 | | | Volume
| 41 | |
25 | Author
| Irpte Iridiumphosphidtellurid, Phosphide Iridium, IrpteG Erhard Telluride, Kliche | Requires 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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| default:Reihe_B/41/ZNB-1986-41b-0130_n.pdf | | | Identifier
| ZNB-1986-41b-0130_n | | | Volume
| 41 | |
27 | Author
| Chu Le | Requires 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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| default:Reihe_B/41/ZNB-1986-41b-0134_n.pdf | | | Identifier
| ZNB-1986-41b-0134_n | | | Volume
| 41 | |
28 | Author
| | 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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| default:Reihe_B/41/ZNB-1986-41b-0137.pdf | | | Identifier
| ZNB-1986-41b-0137 | | | Volume
| 41 | |
29 | Author
| Max Herberhold, Wolfgang Jellen | Requires 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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| default:Reihe_B/41/ZNB-1986-41b-0144.pdf | | | Identifier
| ZNB-1986-41b-0144 | | | Volume
| 41 | |
31 | Author
| H. Erbert, W. Roesky, Jörg Sundermeyer, Jürgen Schimkowiak, Thomas Gries, M. Athias, N. Oltem Eyer, GeorgeM. Sheldrick | Requires 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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| default:Reihe_B/41/ZNB-1986-41b-0162.pdf | | | Identifier
| ZNB-1986-41b-0162 | | | Volume
| 41 | |
32 | Author
| Peter Paetzold3, N. Orbert Finke3, PiaW. Ennek3, G. Ünther, Schmidb, R. Oland Boeseb | Requires 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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| default:Reihe_B/41/ZNB-1986-41b-0167.pdf | | | Identifier
| ZNB-1986-41b-0167 | | | Volume
| 41 | |
33 | Author
| H. Erbert, W. Roesky, Jürgen Schimkowiak, Mathias Noltemeyer, GeorgeM. Sheldrick | Requires 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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| default:Reihe_B/41/ZNB-1986-41b-0175.pdf | | | Identifier
| ZNB-1986-41b-0175 | | | Volume
| 41 | |
34 | Author
| D. Ieter Wöhrle, UweH. Ündorf, G. Ünter, Schulz-Ekloff, Erwin Ignatzek | Requires 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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| default:Reihe_B/41/ZNB-1986-41b-0179.pdf | | | Identifier
| ZNB-1986-41b-0179 | | | Volume
| 41 | |
35 | Author
| Fritz Preuss, Flarald Becker | Requires 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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| default:Reihe_B/41/ZNB-1986-41b-0185.pdf | | | Identifier
| ZNB-1986-41b-0185 | | | Volume
| 41 | |
36 | Author
| Heinrich Lang, G. Ottfried, H. Üttner, Beate Sigwarth, U. Te, W. Eber, Laszlo Zsolnai, Ibrahim Jibril, Olli Orama | Requires 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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| default:Reihe_B/41/ZNB-1986-41b-0191.pdf | | | Identifier
| ZNB-1986-41b-0191 | | | Volume
| 41 | |
37 | Author
| | 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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| default:Reihe_B/41/ZNB-1986-41b-0207.pdf | | | Identifier
| ZNB-1986-41b-0207 | | | Volume
| 41 | |
39 | Author
| Hermann Poschenrieder, Hans-Dietrich Stachel | Requires 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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| default:Reihe_B/41/ZNB-1986-41b-0219.pdf | | | Identifier
| ZNB-1986-41b-0219 | | | Volume
| 41 | |
40 | Author
| Herrn, Dr, Dr | Requires 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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| default:Reihe_B/41/ZNB-1986-41b-0223.pdf | | | Identifier
| ZNB-1986-41b-0223 | | | Volume
| 41 | |
|