Title of article
N-Thiophosphorylated and N-Phosphorylated Iminophosphoranes [R3P=N-P(X)R2; X = O, S] as Models for Dendrimers: Synthesis, Reactivity and Crystal Structures
Author/Authors
Donnadieu، Bruno نويسنده , , Larre، Christophe نويسنده , , Caminade، Anne-Marie نويسنده , , Majoral، Jean-Pierre نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 1999
Pages
-600
From page
601
To page
0
Abstract
Several R3P=N-P(X)Rʹ2 and Fe[C5H4Ph2P=N-P(X)Rʹ2]2 derivatives (X = S, O) are readily obtained from Staudinger reactions between phosphanes and N3-P(X)Rʹ2. The P=N-P=X groups are easily alkylated on the X atom with methyl or isopropyl triflates. The alkylation induces a lengthening of the P-X bond, as shown by X-ray diffraction studies. This corresponds to a weakening of the P-X bond which can be cleaved with P(NMe2)3 to yield [P=N-P:] linkages. The presence of tricoordinated phosphorus atoms opens the way to a versatile reactivity, including the reaction with alkyl iodides and functionalized azides. These molecules are good models for screening which types of reagents and reactions could be used with macromolecules possessing also P=N-P=X linkages, such as dendrimers.
Keywords
Phosphorus , Ferrocenes , Phosphorylated iminophosphoranes , Dendrimers , cations
Journal title
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
Serial Year
1999
Journal title
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
Record number
83555
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