Syntheses and characterizations of cyclotriphosphazenes containing a 4-oxy-1-naphthaldehyde group

摘要

The nucleophilic substitution reaction of hexachlorocyclotriphosphazene (N$_{3}$P$_{3}$Cl$_{6}$, trimer) (1 ) with 4-hydroxy-1-naphthaldehyde (2 ) has been investigated for the first time. 4$^{{prime}} $-Oxy-1$^{{prime}} $-naphthaldehyde substituted mono- (3 ), bis- (4 ), and tris- (5 ) cyclotriphosphazenes were obtained from the nucleophilic substitution of compound 1 with 2 in a 1:2 molar ratio in the presence of Cs$_{2}$CO$_{3}$ in acetone at reflux. The pentakis-(6 ) and hexakis-substituted (7 ) cyclotriphosphazenes were prepared from the reaction of 1 with 2 in a 1:7 molar ratio using K$_{2}$CO$_{3}$ as a proton abstractor in tetrahydrofuran at room temperature. The structures of the new compounds (3-7 ) were determined by elemental analysis, FT-IR, and mass and nuclear magnetic resonance ($^{1}$H and $^{31}$P) spectroscopies.