EXAMPLES OF 1,3,2-DIOXABENZO-PHOSPHOR(III)INANES

The concept allowing to synthesize hitherto unknown 1,3,2-dioxabenzo-p hosphor(III)inanes is introduced. On the basis of H-1, F-19, and P-31 NMR evidence it was shown that the nature of the exocyclic substituent at the phosphorus atom can have a significant influence on the confor mational features of the bicyclic phosphorinane ring system as well as on the chemical properties of this system. The study of the reactions between 2-dialkylaminobenzo-1,3,2-dioxaphosphor(III)inanes and proton containing nucleophiles confirmed the structures of the obtained comp ounds and exhibited their synthetic value.