N-Thiophosphorylated and N-Phosphorylated Iminophosphoranes [R3P=N–P(X)R′2; × = O, S] as Models for Dendrimers: Synthesis, Reactivity and Crystal Structures

✍ Scribed by Christophe Larré; Bruno Donnadieu; Anne-Marie Caminade; Jean-Pierre Majoral

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 436 KB
• Volume: 1999
• Category: Article
• ISSN: 1434-1948
• DOI: 10.1002/(sici)1099-0682(199904)1999:4<601::aid-ejic601>3.0.co;2-x

✦ Synopsis

Several R 3 P=N-P(X)RЈ 2 and Fe[C 5 H 4 Ph 2 P=N-P(X)RЈ 2 ] 2 cleaved with P(NMe 2 ) 3 to yield [P=N-P:] linkages. The presence of tricoordinated phosphorus atoms opens the way derivatives (X = S, O) are readily obtained from Staudinger reactions between phosphanes and N 3 -P(X)RЈ 2 . The P=N-P= to a versatile reactivity, including the reaction with alkyl iodides and functionalized azides. These molecules are good X groups are easily alkylated on the X atom with methyl or isopropyl triflates. The alkylation induces a lengthening of models for screening which types of reagents and reactions could be used with macromolecules possessing also P=N-P= the P-X bond, as shown by X-ray diffraction studies. This corresponds to a weakening of the P-X bond which can be X linkages, such as dendrimers.

S, O) groups determined by X-ray diffraction is also pre- [a]