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Showing 1 to 7 of 7 for “"Iminophosphorane"”.
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Electronic response of phosphorus and nitrogen based ligands on metal coordination
… derivative of the abovementioned phosphane, the iminophosphorane Ph2P(CH2Py)(NSiMe3), is discussed. The C-deprotonated anion of this iminophosphorane prefers (N,N’)-side arm- rather than C-coordination. The electron deficient pyridyl substituent at the C-atom leads to charge delocalization in the …
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Synthesis of o-isotoluenes, o-quinodimethanes, and benzoenynyl carbodiimides and their cyclizations to polycyclic and heterocyclic compounds
… The subsequent aza-Wittig reactions with the iminophosphorane, derived from aniline and Ph3P·Br2 then gave the benzoenynyl carbodiimides. Thermolysis of the benzoenynyl carbodiimides in refluxing p-xylene at 138°C produced the corresponding 6H-indolo[2,3-b]quinolines. Similarly, …
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Regioselective synthesis of curdlan derivatives
… reduction to afford 6-amino-6-deoxycurdlan. The iminophosphorane intermediate generated during Staudinger reactions was further investigated for subsequent syntheses: i) 6-amino or 6-amido-6-deoxycurdlan by in situ reaction with water or excess carboxylic anhydride, ii) 6-monoalkylamino curdlan …
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Organometallic Chemistry in Fe–S Clusters
… or arylated [Fe₄S₄] clusters with chelating iminophosphorane ligands in various oxidation states. In-depth spectroscopic and computational analysis of these clusters suggests that alkylat-ed/arylated Fe sites exhibit partial or complete valence-localization in each redox state. By …
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The Chemistry of Cycloaurated Complexes
… and elemental analysis. The simple cycloaurated iminophosphoranes (2-AuCl₂C₆H₄)Ph₂P=N-R (R = (R,S)-CHMePh, (S)-CHMePh, p-C₆H₄F or But) were synthesised by the reaction of the appropriate ortho-mercurated compound with [Me₄N][AuCl₄] and [Me₄N]Cl in acetonitrile; the complex …
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Neuartige Phosphoniumkatalysatoren für die anionisch ringöffnende Polymerisation von Propylenoxid
Die Dissertation behandelt die anionisch ringöffnende Polymerisation (ROP) von Propylenoxid mittels sterisch anspruchsvoller Iminophosphoniumkatalysatoren (P1). Durch Kontaktionenpaarseparation sollte die Polymerisationsaktivität und die Bildung von Allylethern als Nebenreaktion positiv beeinflusst …
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IN BATCH AND IN FLOW SYNTHESIS OF QUATERNARY AMINO ACIDS/AMINO DERIVATIVES
In Batch and In Flow Synthesis of Quaternary Amino Acids/Amino Derivatives (nel pdf n. 2 )