| | 101 | Author
| M. I. Ali, M.M S El-Morsy, N. M. Hassan, M. Sharaf | Requires cookie* | | | Title
| Synthesis and Some Reactions of Naphthoylacetanilides  | | | | Abstract
| Naphthoylacetanilides The structure of some naphthoylacetanilides (1) obtained from a new route of synthesis is elucidated via inspection of IR, NMR, and mass spectral data. Napthoylacetanilides condensed with one or two moles of aromatic aldehyde to give 2-(naphthoyl)-cinnamanili-des (2) or 3-aryl-2,2'-dinaphthoyl-glutaric acid dianilides (3). Compound 2b added phenylmercaptan to give 3-phenyl 3-phenylthio-2-naphthoyl-propananilide (4). Reduction of 2b gave 2-benzyl 2-(2-naphthoyl)acetanilide (5). 1 is coupled with aryldiazonium salt to give 2-oxo naphthoylacetanilides-2-arylhydrazones (6). The mechanism of the reactions is discussed. | | | |
Reference
| Z. Naturforsch. 33b, 425—428 (1978); received December 12 1977 | | | |
Published
| 1978 | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/33/ZNB-1978-33b-0425.pdf | | | | Identifier
| ZNB-1978-33b-0425 | | | | Volume
| 33 | |
| 102 | Author
| Helga Wittmann, Hannes Siegel | Requires cookie* | | | Title
| Betaine als Zwischenprodukte der Umlagerung eines Spiro-oxirans in ein Dioxolen Betaines as Intermediates in the Rearrangement of a Spiro-oxiran into a Dioxolen 2,4-Dioxo-1-phenyl-1,2,3,4-tetrahydroquinoline-3-spiro-2'-oxirane, 3,4-Methylendioxy-1 -phenyl-1,2-dihydro-2-quinolone, tert-Amines Enolbetaines | | | |
Reference
| Z. Naturforsch. 33b, 429—432 (1978); eingegangen am 28. November 1977 | | | |
Published
| 1978 | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/33/ZNB-1978-33b-0429.pdf | | | | Identifier
| ZNB-1978-33b-0429 | | | | Volume
| 33 | |
| 105 | Author
| A. M. Qureshi, A. N. Patel | Requires cookie* | | | Title
| The Nature of Zolon Red | | | | Abstract
| Pyrazolone Dye, Zolon Red Zolon red is an acid dye obtained in the enol form as the stable condensation product of glutaconic aldehyde with two molecules of l-phenyl-3-methylpyrazol-5-one. Silver(l) replaces the hydroxylhydrogen of the dye to give deep blue precipitate of silver-zolon red compound. | | | |
Reference
| Z. Naturforsch. 33b, 450—453 (1978); received November 28 1977 | | | |
Published
| 1978 | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/33/ZNB-1978-33b-0450.pdf | | | | Identifier
| ZNB-1978-33b-0450 | | | | Volume
| 33 | |
| 106 | Author
| Maria Konieczny, George Sosnovsky | Requires cookie* | | | Title
| Novel Aspects in the Preparation of Phorone | | | | Abstract
| The condensation of acetone using anhydrous hydrogen chloride results after three weeks at room temperature, in a 15% yield of phorone (4) and a 75% yield of mesityl oxide (5). In the presence of one weight percent of the Lewis acid, aluminium chloride, the yield of 4 is increased to 39%. An increase in the amount of the Lewis acid, aluminium chloride, to ten weight percent results in a 22% yield of phorone (4) and a 68% yield of mesityl oxide (5). In the presence of one hundred weight percent of aluminium chloride, (CH3)2C = CHC CHr C(CH3)2 (CH3)2 C=CHCCH3 | | | |
Reference
| Z. Naturforsch. 33b, 454—460 (1978); received Januaiy 4 1978 | | | |
Published
| 1978 | | | |
Keywords
| Phorone, Mesityl Oxide, Triacetoneamine, Nitroxyls | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/33/ZNB-1978-33b-0454.pdf | | | | Identifier
| ZNB-1978-33b-0454 | | | | Volume
| 33 | |
| 111 | Author
| Atta-Ur-Rahman, Sadiqa Firdous, Anwer Basha | Requires cookie* | | | Title
| Alkaloids, IX* Some Aspects of the Chemistry of C atliar anthine | | | | Abstract
| Vinblastine and Vincristine are binary indole-indoline alkaloids occurring in traces in the leaves of Vinca rosea. They are among the most powerful chemotherapeutic agents available to man for the treatment of a variety of cancers. Their high cost and complexity of structure has attracted the attention of many eminent chemists towards their synthesis. The first synthesis of both these anta'-tumour alkaloids was reported by us last year [7] starting from two major alkaloids, catharanthine and vindo-line, which co-occur in the same plant. Some aspects of the chemistry of catharanthine are now presented including a novel one-step de-carbomethoxylation reaction with H2S in glacial acetic acid and a reversible isomerization of catharanthine with sodium borohydride. A study of the life-time of catharanthine in hot glacial acetic acid substantiates the earlier work of the Anglo-French group on the biosynthesis of indole alkaloids. | | | |
Reference
| Z. Naturforsch. 33b, 469—470 (1978); received December 5 1977 | | | |
Published
| 1978 | | | |
Keywords
| Vinblastine, Vincristine, Decarbomethoxylation, anti-Cancer Drugs, Indole Alkaloids | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/33/ZNB-1978-33b-0469_n.pdf | | | | Identifier
| ZNB-1978-33b-0469_n | | | | Volume
| 33 | |
| 115 | Author
| Manfred Spangenberg, Weif Bronger | Requires cookie* | | | Title
| KaPtSig, Synthese und Kristallstruktur K2PtSi5, Synthesis and Crystal Structure | | | | Abstract
| Crystal Structure, Ternary Poly sulfides K2PtSi5 can be synthesized from solutions of potassium polysulfide and hexachloro-platinic acid. X-ray investigations on single crystals revealed its structure. Similar to the ammonium salt (NH^PtSis 2 H2O, the Pt-atom of the PtSis 2-anion is found in an octahedral environment consisting of three bidentate five-membered sulfur chains. | | | |
Reference
| Z. Naturforsch. 33b, 482—484 (1978); eingegangen am 28. November 1977 | | | |
Published
| 1978 | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/33/ZNB-1978-33b-0482.pdf | | | | Identifier
| ZNB-1978-33b-0482 | | | | Volume
| 33 | |
| 116 | Author
| Wolfgang Schwarz, Hans-Jürgen Guder | Requires cookie* | | | Title
| Die | | | | Abstract
| Kristallstruktur des dimeren Dimethylantimontrichlorids und des Tetramethylantimon-hexachloroantimonats [(CH3)2SbCl3]2 und [(CH3)4Sb] + [SbCl6]-Crystal Structure of the Dimeric Dimethylantimony Trichloride and Tetramethylantimony Hexachloroantimonate [(CH3)2SbCl3]2 and [(CH3)4Sb]+[SbCl6]- Dimethylstibonium trichloride (CH3)2SbCl3 exists in two isomeric forms. In the dimeric "covalent" one, [(CH3)2SbCl3]2, two formula units are bridged by chlorine, building a four-membered ring. It crystallizes in the orthorhombic space group Pnma with lattice constants a = 1212.9, b = 1910 and c = 610.2 pm. The mean value of bond length from antimony to the terminal chlorine atoms is 235.5 pm, to the bridging chlorine atoms 280.0 pm and the averaged Sb-C distance is 213.3 pm. The second form [(CH3)4Sb]+[SbCl6] -is an ionic one and crystallizes in the triclinic space group Pi with lattice constants a = 715.6, b = 744.2, c = 1415.2 pm, a = 90.01, ß = 93.39 and y = 106.4°. The mean values of bond lengths are Sb-C 211.5 pm and Sb-Cl 238.2 pm. The tetrahedrical as well as the octahedrical coordination polyhedra are only slightly distorted. | | | |
Reference
| Z. Naturforsch. 33b, 485—488 (1978); eingegangen am 1. März 1978 | | | |
Published
| 1978 | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/33/ZNB-1978-33b-0485.pdf | | | | Identifier
| ZNB-1978-33b-0485 | | | | Volume
| 33 | |
| 118 | Author
| W. S. Sheldrick, D. Schomburg, W. Wolfsberger | Requires cookie* | | | Title
| Kristall-und Molekülstruktur von N-(TricHorgermyl)-trimethylphosphinimin [Cl3Ge-N=PMe3]", n = 1 und 2 Crystal and Molecular Structure of N-(Trichlorogermyl)-trimethylphosphinimine [Cl3Ge-N=PMe3]n) n= 1 and 2 | | | | Abstract
| X-ray, N-Germylphosphinimine, Pentacoordinate Germanium N-(Trichlorogermyl)trimethylphosphinimine crystallizes in the triclinic space group PI with a = 12.49(2), b = 12.54(3), c = 6.66(1) A,a = 100.96(10),ß = 91.45(14), y = 102.77(15)°. The structure was solved by Patterson and difference syntheses and refined to R = 0.063 for 2867 independent reflections. In the unit cell there are two symmetry related monomers containing tetracoordinated Ge and one crystallographically centrosymmetric dimer with a planar four-membered [GeN]2 ring exhibiting trigonal-bipyramidal pentacoordinated Ge and trigonal N. Significant differences are observed in the bond lengths from penta-coordinated Ge to its equatorial and axial ligands: Ge-Neq 1.837(7), Ge-Nax 1.972(7), Ge-Cleq 2.176(2) and 2.170(2), Ge-Cl ax 2.345(3) A. The Ge—Neq distance is similar to that observed in tetracoordinated derivatives [1.81-1.87 A], whereas the Ge-Nax distance is 0.22 A shorter than that observed for the axial N->Ge coordinate bond in hitherto known pentacoordinated derivatives [2.19-2.24 A]. The very short Ge-N bond length of 1.737(8)A in the monomer which is 0.07 A shorter than in other tetracoordinated derivatives may be indicative of the involvement of a (p-*d)ji component. | | | |
Reference
| Z. Naturforsch. 33b, 493—497 (1978); eingegangen am 3. März 1978 | | | |
Published
| 1978 | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/33/ZNB-1978-33b-0493.pdf | | | | Identifier
| ZNB-1978-33b-0493 | | | | Volume
| 33 | |
| 119 | Author
| HeinzP. Fritz, Helmut Gebauer, Peter Friedrich, Peter Ecker, Reinhold Artes, Ulrich Schubert | Requires cookie* | | | Title
| Elektrochemische Synthesen, XIV [1] Radikalkation-Salze des Naphthalins Electrochemical Syntheses, XIV [1]. Radical Cation Salts of Naphthalene | | | | Abstract
| By anodic oxidation of naphthalene in H2CCI2/O.O2 m Bu4NPF6 at —45 °C dark red-violet crystals of (CioHshPFö can be obtained by electrocrystallisation. They are stable at low temperatures, however, decompose on warming. In solution and in the poly-crystalline state these radical cation salts show only narrow e.p.r. signals without h.f.s. The specific conductivity of a polycrystalline pellet at room temperature was determined to be 0.12 ±0.046 Ohm -1 cm -1 . The structure determination of (CioHs^PFe yielded the tetragonal space group P42/n, Z = 2, a = b = 1156(2), c = 640(1) pm. Patterson synthesis and difference Fourier analyses showed the compound to have a columnar stacking of CioHg units the long molecular axes of which are twisted alternately by 90° around a screw axis in c-direction, and the molecular planes of which are 320 pm apart. The PFß -ions have four nearest CioHs neighbours lying in pairs in parallel planes 63 pm above and below that plane of PF6~ perpendicular to the c-axis and containing a PF4 group. This is the first established case for a columnar structure of a pure hydrocarbon radical cation. (CIOH8)2AsF6 is isomorphous. | | | |
Reference
| Z. Naturforsch. 33b, 498—506 (1978); eingegangen am 21. Februar 1978 | | | |
Published
| 1978 | | | |
Keywords
| Naphthalene Radical Cation, X-ray, Columnar Structure, Conductivity | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/33/ZNB-1978-33b-0498.pdf | | | | Identifier
| ZNB-1978-33b-0498 | | | | Volume
| 33 | |
|
