1952
DOI: 10.1002/jlac.19525760106
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Über das Verhalten von Schwefelverbindungen in Gegenwart von Raneynickel. IV

Abstract: H a u p t m a n n , W l a d i s l a w , N a z a r i o und W a l t e r 45Die XH,-Entwicklung ist nach 5 Stunden beendet. Xach der 6. Stunde werden 11,9 g Propargylbromid zugegeben und 20 Stunden am RiickfluB gekocht. Mali filtriert ab und erhalt einen Riickstand, der weil3e Schuppen und braunkornigen h'iederschlag enthalt. Die Zersetzung mit Wasser und Aufarbeiten der stark alkalischen Losung, die NH, entbindet, zeigt Bromid-ion und nach Filtration volt wenig lockerem brauncn Polymerisat beim Aiisauern cinen he… Show more

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Cited by 15 publications
(9 citation statements)
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“…When p-tolyl sulfide was heated with a tenfold excess of degassed Raney Nickel, p-bitolyl could be isolated in up to 84% conversion. 6 In our hands this dimerization reaction was very sensitive to the weight…”
Section: Resultsmentioning
confidence: 84%
“…When p-tolyl sulfide was heated with a tenfold excess of degassed Raney Nickel, p-bitolyl could be isolated in up to 84% conversion. 6 In our hands this dimerization reaction was very sensitive to the weight…”
Section: Resultsmentioning
confidence: 84%
“…Bougault, Cattelain and Chabrier (83,84) observed in 1939 that in the presence of Raney nickel aliphatic organic sulfur compounds under very mild conditions loose their sulfur which is replaced by hydrogen. This is furnished, as was demonstrated later (72), by the Raney nickel which contains a considerable amount of it (76,82,179,188,245,252,305,337,407,448,484). The sulfur combines with the nickel to give nickel sulfide.…”
Section: Introductionmentioning
confidence: 71%
“…The behavior of sulfur compounds in the presence of Raney nickel degassed by heating in vacuo at 100°( Raney Ni 100) and 200°( Raney Ni 200) has been studied by Hauptmann, Wladislaw, and Camargo (248,249,251). Later the degassing temperature was raised to 500°( Raney Ni 500) (247,252) nickel powder obtained by reducing nickel oxide with hydrogen at 320°( 247) or by decomposing nickel oxalate at 350°( 246) has been employed; the former was degassed at 200°in vacuo before being used, the latter was used without pretreatment. W-7 Raney nickel heated in vacuo (12 mm.)…”
Section: Degassed Raney Nickelmentioning
confidence: 99%
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“…In absol. Pyridin (10 Teile auf j e1 Teil I1 und P,S,) aber, das fiir beide Komponenten ausreiohendes Lbsunpvermbgen besitzt, gelang die Umsetzung zu I11 in 69proz. Auebeute duroh 3stiindiges Koohen, Einengen und Ein-gieQen in h e i h Wasser.…”
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