PHOSPHONATION OF 1,1'-BINAPHTHALENE-2,2'-DIOL (BINOL) - SYNTHESIS OF DIHYDROXY-1,1'-BINAPHTHATENE-6,6'-DIYLDIPHOSPHONIC AND DIHYDROXY-1,1'-BINAPHTHATENE-6,6'-DIYLDIPHOSPHONIC ACID

The synthesis of 6,6'-bis(diethoxyphosphoryl)-1,1 '-binaphthalene-2,2' -diol 1 in racemic and chiral forms is described. This synthesis, whic h involves a palladium-assisted phosphonation step, allows study of th e phosphonation of bromophenol as an;electron-rich aryl bromide model. Furthermore, the synthesis of 2,2'-dihydroxy-1,1 '-binaphthalene-6,6' -diyldiphosphonic acid 2, from its diester 1, leads to a key intermedi ate in the synthesis of hybrid organic-inorganic materials.