The reaction of N-salicylidene-2-aminophenolate (SAP-H-2) derivatives with
phenyl boronic acid afforded five new boron bicyclic species in moderate yi
elds, as confirmed by an X-ray study of the boron heterocycle derived from
2-amino-4-chlorophenol. The results also showed that the boron complexes de
rived from Schiff bases undergo an acetolysis reaction to give the correspo
nding dioxazaborocines containing all substituents on the same side also in
good yields. The structure of one of the addition products was established
by X-ray analysis showing that, in the solid state, it exists as a dimeric
structure formed by hydrogen bonds.