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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 110 (1977), S. 124-137 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis, Ring Cleavage Reactions, and Halogen/Lithium Exchange of 1-Bromo-1-fluorocyclopropanesThe synthesis of the bromofluorocyclopropanes 1-7 is described. Ring cleavage reactions with silver acetate, sodium malonate and phenolate yield the fluorine derivatives 9-12. With phenyl- or methyllithium the acetylenes 14a, b besides phenylallene (13) are obtained from 5. Selective bromine/lithium exchange of 8, 5, and 6 below -105°C with subsequent carboxylation and esterification affords the fluorocyclopropanecarboxylic esters 17, 19, and 21. At -90 to -100°C complex mixtures are obtained. 5, 6, 15, 19, and 21, separated as the isomers a and b, are assigned by detailed investigation of their 1H n. m. r. spectra. Particularly, the vicinal H-F coupling constants characteristically depend on the various cyclopropane substituents.
    Notes: Die Darstellung der Bromfluorcyclopropane 1-7 wird beschrieben. Ringöffnungsreaktionen mit Silberacetat, Natriummalonester und -phenolat ergeben die Fluorderivate 9-12. Mit Phenyl- bzw. Methyllithium werden aus 5 neben Phenylallen (13) die Acetylene 14a und b erhalten. Selektiver Brom/Lithium-Austausch von 8, 5 und 6 unterhalb -105°C ergibt nach Carboxylierung und Veresterung die Fluorcyclopropancarbonsäureester 17, 19 und 21. Bei -90 bis -100°C werden komplexe Gemische erhalten. Die in die jeweiligen Isomeren a und b getrennten 5,6,15,19 und 21 werden durch eingehende Untersuchung ihrer 1H-NMR-Spektren zugeordnet, wobei besonders die vicinalen H-F-Kopplungskonstanten charakteristisch von den anderen Substituenten am Cyclopropan abhängen.
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  • 2
    ISSN: 0009-2940
    Keywords: Diphosphorus zwitterion ; Phosphorus, hexacoordinated ; Phosphorus, tetracoordinated ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis and X-Ray Crystal Structure Analysis of a Novel Mixed-Valent Zwitterionic Diphosphorus Fluoro CompoundThe cyclic zwitterionic λ6P,λ4P-diphosphorus compound F5P-N(Me)P+ [N(Me)C(=O)]2NMe (3), which contains a biuret system, was synthesized by the reaction of (MeNPF3)2 (1) with MeNCO (2). Compound 3 was characterized by means of 1H-, 13C-, 19F- and 31P-NMR spectroscopy, IR spectroscopy, and mass spectrometry. A single-crystal X-ray structure determination revealed the presence of two independent formula units, in which the -N(Me)PF5 side chains display widely differing conformations.
    Additional Material: 1 Ill.
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  • 3
    ISSN: 0009-2940
    Keywords: Phosphaalkenes ; Cycloadditions ; Insertion reactions ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The dimethylamino-substituted phosphaalkene 1 reacts with hexafluoroacetone (HFA) with addition at the P=C bond to form the 1,5,2-dioxaphosphorinane 2. The structure of 2 was confirmed by an X-ray crystal structure analysis. The six-membered ring displays an envelope conformation with the phosphorus atom out of the plane, but the phosphorus is disordered over two sites. Reaction of P-trimethylsilyl-substituted phosphaalkenes with HFA proceeds with retention of the P=C double bond and insertion of HFA into the P—Si bond. Two isomeric products are obtained and are characterized by 1H-, 13C-, 19F-, and 31P-NMR spectroscopy, IR spectroscopy, mass spectrometry, and elemental analysis.
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 127 (1994), S. 1395-1397 
    ISSN: 0009-2940
    Keywords: 1,3,2λ5-Diazaphosphetidin-4-ones,2-chloro-2-phenyl-2-(p-tolylthio)-1,3-diorgano- ; Phosphorus, pentacoordinated ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The reaction of N,N′-dimethyl-N,N′-bis(trimethylsilyl)urea (1) or N-methyl-N′-phenyl-N,N′-bis(trimethylsilyl)urea (2) with p-toluenesulfenyl chloride furnished N,N′-dimethyl-N-(p-tolylthio)-N′-
    Additional Material: 1 Ill.
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  • 5
    ISSN: 0044-2313
    Keywords: sulfenamides ; phosphorus ; pentacoordinated ; X-ray structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reaktionen von Sulfenamiden mit Verbindungen des dreiwertigen PhosphorsChlor-dimethylamino-phenyl-p-tolylthio-phosphoniumchlorid 2, Dimethylamino-diphenyl-p-tolylthio-phosphoniumchlorid 3, Bis(diethylamino)-dimethylamino-p-tolylthiophosphoniumchlorid 4 und tert-Butyl-dimethylaminophenyl-p-tolylthiophosphonium-chlorid 5 wurden durch Umsetzung von N,N-Dimethylamino-p-tolylsulfenamid 1 mit PhPCl2, Ph2PCl, (Et2N)2PCl und tBu(Ph)PCl erhalten. Die Reaktion von N,N′-Dimethyl-N,N′-bis(trimethylsilyl)harnstoff 9 und N-Methyl-N′-phenyl-N,N′-bis(trimethylsilyl)harnstoff 10 mit Phenylsulfenylchlorid 6 oder p-Nitrophenylsulfenyl-chlorid 8 ergab die N-Arylthio-N,N′-diorgano-N′-(trimethylsilyl)harnstoffe 11 - 14. Die Umsetzung von 11 - 14 und der bereits bekannten Verbindungen 15 und 16 mit MePCl2, ClCH2PCl2, tBuPCl2 und PhPCl2 führte zur Bildung der 2-(Arylthio)-2-chlor-1,2,3-triorgano-1,3,2λ5-diazaphosphetidin-4-one17 - 26. 1,3-Dimethyl-2-(1,1,1,3,3,3-hexafluor-2-propoxy)-2-phenyl-2-phenylthio-1,3,2λ5-diazaphosphetidin-4-on 29 und die 2-Arylthio-1,3-dimethyl-2-(p-nitrophenoxy)-2-organyl-1,3,2λ5-diazaphosphetidin-4-one 30 - 32 wurden durch Umsetzung der Verbindungen 17, 24 und 27 mit 1,1,1,3,3,3-Hexafluor-2-propanol oder p-Nitrophenol in Anwesenheit von Triethylamin dargestellt. Die Reaktion von 21 mit Thiophenol in Anwesenheit von Triethylamin ergab ein Produktgemisch, aus dem das Spirophosphoran 1,3,4,5,7-Pentamethyl-1,3,5,7-tetraaza-4λ5-phosphaspiro[3.3]heptan-2,6-dion 33 isoliert werden konnte. Identität und Struktur aller neuen Verbindungen wurden durch 1H-, 13C- and 31P-NMR-Spektroskopie und durch Elementaranalyse nachgewiesen. Ein möglicher Mechanismus für die Reaktion von Sulfenamiden mit Verbindungen des dreiwertigen Phosphors wird diskutiert. Für die Verbindungen 5a, 32 und 33 wurden Einkristall-Röntgenstrukturanalysen durchgeführt. Das Kation der Verbindung 5a enthält vierfach-koordinierten Phosphor (nahezu tetraedrische Geometrie) und stellt ein seltenes Beispiel einer P-S-Einfachbindung in einem solchen System dar (P-S 207,37(9) pm). In 32 ist die Geometrie am Phosphor verzerrt trigonal bipyramidal, wobei die axialen Lagen durch Sauerstoff- und Stickstoffatome besetzt sind. Im Spirophosphoran 33 liegt die Geometrie am Phosphor zwischen trigonal bipyramidal und quadratisch pyramidal, mit nahezu planaren Vierringen.
    Notes: Chloro-dimethylamino-phenyl-p-tolylthio-phosphonium chloride 2, dimethylamino-diphenyl-p-tolylthio-phosphonium chloride 3, bis(diethylamino)-dimethylamino-p-tolylthiophosphonium chloride 4 and tert-butyl-dimethylamino-phenyl-p-tolylthio-phosphonium chloride 5 were prepared by the reaction of N,N-dimethylamino-p-tolylsulfenamide 1 with PhPCl2, Ph2PCl, (Et2N)2PCl and tBu(Ph)PCl, respectively. The reaction of N,N′-dimethyl-N,N′-bis(trimethylsilyl)urea 9 and N-methyl-N′-phenyl-N,N′-bis(trimethylsilyl)urea 10 with phenylsulfenyl chloride 6 or p-nitrophenylsulfenyl chloride 8 furnished the N-arylthio-N,N′-diorgano-N′-(trimethylsilyl)-ureas 11 - 14. The reaction of 11 - 14 and of the previously known compounds 15 and 16 with MePCl2, ClCH2PCl2, tBuPCl2 and PhPCl2 resulted in the formation of the 2-arylthio-2-chloro-1,2,3-triorgano-1,3,2λ5-diazaphosphetidin-4-ones 17 - 26. 1,3-Dimethyl-2-(1,1,1,3,3,3-hexafluoro-2-propoxy)-2-phenyl-2-phenylthio-1,3,2λ5-diazaphosphetidin-4-one 29 and the 2-arylthio-1,3-dimethyl-2-(p-nitrophenoxy)-2-organyl-1,3,2λ5-diazaphosphetidin-4-ones 30 - 32 were obtained in the reactions of compounds 17, 24 and 27 with 1,1,1,3,3,3-hexafluoro-2-propanol or p-nitrophenol in the presence of triethylamine. The reaction of compound 21 with thiophenol in the presence of triethylamine resulted in a mixture of products, from which 1,3,4,5,7-pentamethyl-1,3,5,7-tetraaza-4λ5-phosphaspiro[3.3]heptan-2,6-dione 33 was isolated. The identity and structure of all the new compounds were established by 1H-, 13C- and 31P-NMR spectroscopy and by elemental analysis. A possible mechanism of reaction of sulfenamides with compounds of trivalent phosphorus is discussed. For the compounds 5a, 32 and 33 X-ray structure analyses were conducted. The cation of compound 5a involves four-coordinate phosphorus (essentially tetrahedral geometry) and is a rare example of a P-S single bond in such a system (P-S 207.37(9) pm). In 32 the geometry at phosphorus is distorted trigonal bipyramidal, with axial positions occupied by oxygen and nitrogen atoms. In the spirophosphorane 33 the geometry at phosphorus is intermediate between trigonal bipyramidal and square pyramidal, with essentially planar four-membered rings.
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  • 6
    ISSN: 0044-2313
    Keywords: 1,3,2λ5-Diazaphosphetidin-4-ones ; 2-Arylseleno-2-chloro-1,2,3-triorgano Selenenamides ; 77Se-NMR ; X-ray structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthese und Charakterisierung von 2-Arylseleno-2-chloro-1,2,3-triorgano-1,3,2λ5-diazaphosphetidin-4-onenDie Reaktion von N,N′-Dimethyl-N,N′-bis(trimethylsilyl)harnstoff 8 und N-Methyl-N′-phenyl-N,N′-bis(trimethylsilyl)harnstoff 9 mit Phenylselenenylchlorid 6 oder p-Chlorophenylselenenylchlorid 7 ergab die N-Arylseleno-N,N′-diorgano-N′-(trimethylsilyl)harnstoffe 10-13. Die Umsetzung von 10-13 mit MePCl2 und PhPCl2 führte zur Bildung einer neuen Verbindungsklasse, der 2-Arylseleno-2-chloro-1,2,3-triorgano-1,3,2λ5-diazaphosphetidin-4-one 14-19. Die neuen Selenophosphorane 20 and 21 wurden durch Umsetzung der Verbindungen 15 und 17 mit p-Nitrophenol in Anwesenheit von Triethylamin dargestellt. Identität und Struktur der neuen Verbindungen wurden durch 1H- und 13C-NMR-Spektroskopie und durch Elementaranalyse sowie durch 31P- und 77Se-NMR-Spektroskopie für 14-21 und durch Massenspektrometrie für 11 und 13 bewiesen. Ein möglicher Mechanismus der Bildung der Selenophosphorane wird diskutiert. Für die Verbindungen 19 und 20 wurden Einkristall-Röntgenstrukturanalysen durchgeführt. Beide Strukturen zeigen eine verzerrt trigonalbipyramidale Geometrie am Phosphor, wobei die größten Verzerrungen durch die viergliedrigen Ringe verursacht werden.
    Notes: The reactions of N,N′-dimethyl-N,N′-bis(trimethylsilyl)urea 8 and N-methyl-N′-phenyl-N,N′-bis(trimethylsilyl)urea 9 with phenylselenenyl chloride 6 and p-chlorophenylselenenyl chloride 7 furnished the N-arylseleno-N,N′-diorgano-N′-(trimethylsilyl)ureas 10-13. The reactions of 10-13 with MePCl2 and PhPCl2 resulted in the formation of a new class of compounds, the 2-arylseleno-2-chloro-1,2,3-triorgano-1,3,2λ5-diazaphosphetidin-4-ones 14-19. The new selenophosphoranes 20 and 21 were obtained in the reaction of 15 and 17 with p-nitrophenol in the presence of triethylamine. The identity and structure of the new compounds were established by 1H- and 13C-NMR spectroscopy, elemental analysis, 31P- and 77Se-NMR spectroscopy in the case of the selenophosphoranes 14-21, and mass spectrometry in the case of 11 and 13. A possible mechanism of the reaction leading to the selenophosphoranes is discussed. Single-crystal X-ray structure analyses of the selenophosphoranes 19 and 20 were conducted. Both display distorted trigonal bipyramidal geometry at phosphorus, the major distortions being imposed by the four-membered rings.
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