Nucleophilic substitution reactions of monofunctional nucleophilic reagents with cyclotriphosphazenes containing 2,2-dioxybiphenyl units

摘要

The nucleophilic substitution reactions of mono- and bis-spiro-2,2' -dioxybiphenyl cyclotriphosphazenes (3 and 4 ) with cyclopropanemethylamine (5 ) and aniline (6 ) were performed in the presence of trimethylamine in THF. Five novel cyclopropanemethylamino- and anilino-substituted spiro-2,2' -dioxybiphenyl cyclotriphosphazene derivatives (7-11 ) were obtained from these reactions. The molecular structures of the new cyclotriphosphazene derivatives (7- 11 ) were characterized by elemental analysis, MALDI-TOF MS, FT-IR, and NMR ( $^{31}$P and $^{1}$H) spectroscopies. The structure of the spiro-(2,2' -dioxybiphenyl)-bis-(anilino)-cyclotriphosphazene (11 ) was also determined by single-crystal X-ray crystallography.