ZfN: Search Results

Browse byFacets

Bookbag ( 0 )

Facet section ZfN Section B:Volume 041 [X]
Facet Publication Year 1986 [X]

Results 263 Items

2

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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/41/ZNB-1986-41b-0105.pdf
	Identifier	ZNB-1986-41b-0105
	Volume	41

22	Author	R.R G Upta, M. Kum, Rakesh Kumar	Requires 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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/41/ZNB-1986-41b-0110.pdf
	Identifier	ZNB-1986-41b-0110
	Volume	41

23	Author	Joachim Stauff, G.Erhard Stärk	Requires 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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/41/ZNB-1986-41b-0113.pdf
	Identifier	ZNB-1986-41b-0113
	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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/41/ZNB-1986-41b-0130_n.pdf
	Identifier	ZNB-1986-41b-0130_n
	Volume	41

26	Author	Taha El-Shihi, R. Udolf, Herrm Ann	Requires 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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/41/ZNB-1986-41b-0132_n.pdf
	Identifier	ZNB-1986-41b-0132_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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/41/ZNB-1986-41b-0144.pdf
	Identifier	ZNB-1986-41b-0144
	Volume	41

30	Author	JosephG. Robe, Duc Le Van, Jürgen Nientiedt	Requires 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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/41/ZNB-1986-41b-0149.pdf
	Identifier	ZNB-1986-41b-0149
	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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/41/ZNB-1986-41b-0207.pdf
	Identifier	ZNB-1986-41b-0207
	Volume	41

38	Author	Z. Naturforsch	Requires 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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/41/ZNB-1986-41b-0211.pdf
	Identifier	ZNB-1986-41b-0211
	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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/41/ZNB-1986-41b-0223.pdf
	Identifier	ZNB-1986-41b-0223
	Volume	41

2