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Improved synthesis of cyclic and polymeric phosphazenes based on facile chlorine substitution with phenols promoted by cesium carbonate
Author(s) -
Carriedo Gabino A.,
Alonso Francisco J. García,
González Pedro A.
Publication year - 1997
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.1997.030180503
Subject(s) - trimer , phenols , chemistry , tetrahydrofuran , solvent , acetone , medicinal chemistry , chlorine , polymer chemistry , organic chemistry , dimer
In this report we describe a very convenient synthetic method for the preparation in high yields and purity of cyclic [N 3 P 3 (OCH 2 CF 3 ) 6 ] and [N 3 P 3 (OC 6 H 4 R) 6 ] (R = Br, CN, CHO, COC 6 H 5 , COCH 3 , H, OCH 3 ), and polymeric [NP(OC 6 H 4 R) 2 ] n (R = Br, CHO, COC 6 H 5 , H, Bu t ) phosphazenes from the direct reaction of the trimer [N 3 P 3 Cl 6 ] or the high polymer [NPCl 2 ] n and the alcohol HOCH 2 CF 3 or the para ‐substituted phenols HOC 6 H 4 R, using Cs 2 CO 3 as proton abstractor and acetone or tetrahydrofuran as solvent.