o-Hydroxyarylphosphines and diphosphines: Metallation-rearrangement versus P-O reduction of o-halogenoaryloxyphosphines by sodium

Article abstract of DOI:10.1016/0022-328X(96)06314-0

o-Bromo-and o-chloroaryloxyphosphines 1 may react with sodium in two competing ways: (i) metal halogen exchange followed by rapid intramolecular 1,3-rearrangement to give sodium o-hydroxylato-arylphosphines 2, later converted to their OSiMe₃ de