SYNTHESIS AND CHARACTERIZATION OF SIDE GROUP-MODIFIED CYCLOTETRAPHOSPHAZENE DERIVATIVES

Two novel cyclotetraphosphazene derivatives were synthesized by the reaction of octachlorocyclotetraphosphazene with the potassium salt of 4-hydroxybenzaldehyde, and subsequent reduction of aldehyde groups to alcohol groups using sodium borohydride. The bromination reaction was carried out using PBr(3) to give N(4)P(4)(OC(6)H(4)-p-CH(2)Br)(8) (4). This compound was employed in reaction with imidazole or morpholine to produce eight-armed, star-branched title compounds. The target compounds were characterized by (1)H, (31)P, and (13)C NMR as well as IR and ESI-MS. The Cu complex of 5a was effective in oxidative cleavage reactions.Natural Science Foundation of China[20972143, 20602032, 20732004, 20972130