STEREOCHEMISTRY OF SOME BIS-SPIROCYCLIC PHOSPHAZENES

Abstract

Remarkably, although chiral cyclophosphazenes bearing biphenoxy or binaphtoxy groups are known, no particular attention was given to the stereochemical course of the reaction. We have therefore investigated in more detail the synthesis of some bis-spirocyclic phosphazenes obtained with racemic mixtures of the diols 2,2'-dioxybiphenyl and 2', 2''-dioxy-1'-1''-bi-2-naphtyl (abbreviated as biphenoxy or binaphtoxy, respectively) and N₃P₃Cl₆.