Phosphorus–nitrogen compounds. Part XXXIX. Friedel–Crafts reactions of chloro(piperidino)cyclotriphosphazatrienes with benzene

Abstract

Chloro(piperidino)cyclotriphosphazatrienes, N₃P₃Cl_6–n(NC₅H₁₀)_n, react with boiling benzene in the presence of anhydrous aluminium chloride to give phenylpiperidino-derivatives, N₃P₃Ph_mCl_6–n–m(NC₅H₁₀)_n. Replacement of chlorine by phenyl occurs at PCl (NC₅H₁₀) but not at PCl₂, groups under the conditions investigated. Hydrocarbons are not observed as by-products except in reactions of chloro(dimethylamino)(piperidino)cyclotriphosphazatrienes. Differences in the behaviour of chloro(piperidino)- and chloro(dimethylamino)-cyclotriphosphazatrienes are discussed.