Abstract
The concept allowing to synthesize hitherto unknown 1,3,2-dioxabenzo-phosphor(III)inanes is introduced. On the basis of 1H, 19F, and 31P NMR evidence it was shown that the nature of the exocyclic substituent at the phosphorus atom can have a significant influence on the conformational 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 compounds and exhibited their synthetic value.