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1994 (4)
1Author    M. Anfred Fild, PeterG. Jones, Karsten Ruhnau, Carsten ThöneRequires cookie*
 Title    Darstellung und Strukturen von 2,2,4,4-Tctrafluor-l,3-diphosphctancn und -1,3-diphosphetan-disulfiden Synthesis and Structures of 2,2,4,4-Tetrafluoro-l,3-diphosphetanes and of -1,3-diphosphetane Disulfides  
 Abstract    A simple route to 1,3-diphosphetanes [RPCF2]2 [R = Ph, Me, Bu'] is described. The phos-phaalkene intermediates RP=CF2, as well as the corresponding disulfides [R (S)PC F2]2 have been characterized. The crystal structures of [PhPCF2]2, and of the sulfides [Ph(S)PCF2]2 and [Bu'(S)PCF2]2 are reported. 
  Reference    Z. Naturforsch. 49b, 1361—1367 (1994); eingegangen am 6. Juni 1994 
  Published    1994 
  Keywords    Phosphaalkenes, 1, 3-Diphosphetanes, 1, 3-Diphosphetane Disulfides, NM R Spectra, Crystal Structure 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-1361.pdf 
 Identifier    ZNB-1994-49b-1361 
 Volume    49 
2Author    HansG. Ünter Aurich, Abdellatif ChairRequires cookie*
 Title    .3-DipoIare Cycloaddition von Dinitronen - Bildung tricyclischer Dimerer 1 .3 -Dipolar Cycloaddition of Dinitrones -Formation of Tricyclic Dimers  
 Abstract    Various dialdehydes (1 -5) were formed by addition of dithiols to acrolein. Reaction of these dialdehydes with N-alkylhydroxylamines afforded dinitrones the two nitrone groups of which were joined by an alkylidene chain containing two sulfur atoms (6 a ,b -1 0 a ,b). Cycloaddition of these dinitrones with dimethyl acetylenedicarboxylate proceeded in the usual way giving bis(4-isoxazolines) (lla -1 5 a) . 
  Reference    Z. Naturforsch. 49b, 963—9 (1994); eingegangen am 16. März 1994 
  Published    1994 
  Keywords    Dialdehydes, Dinitrones, 1, 3-Dipolar Cycloaddition, Tricyclic Compounds, Metal C om plexes 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0963.pdf 
 Identifier    ZNB-1994-49b-0963 
 Volume    49 
3Author    Akinori ShiotaniRequires cookie*
 Title    Die Pd-katalysierte oxidative Kupplungsreaktion von Methylbenzoesäuremethylester The Pd-Catalyzed Oxidative Coupling Reaction of Methyl Methylbenzoates  
 Abstract    The Pd-catalyzed oxidative coupling reaction of methyl o-toluate gives, in the presence of a Pd/l,10-phenanthroline(phen)/Cu catalyst, exclusively, the para-linked biphenyldicarboxy-lates 1, 2, and 3. On the other hand, the meta-linked biphenyldicarboxylates 4 and 5, were predominantly formed in a catalyst system of Pd/2,4-pentanedione(acacH)/Cu, and under similar conditions 6 and 7 were also obtained from the coupling reaction of methyl m-toluate and methyl p-toluate, respectively. A reaction scheme has been proposed. 
  Reference    Z. Naturforsch. 49b, 1731—1736 (1994); eingegangen am 21. April 1994 
  Published    1994 
  Keywords    Coupling Reaction, Steric Influence, Palladium, 1, 10-Phenanthroline, 2, 4-Pentanedione 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-1731.pdf 
 Identifier    ZNB-1994-49b-1731 
 Volume    49 
4Author    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