Syntheses and reactions of the bis-boryloxide O(Bpin)2 (pin = O2C2Me4)

Abstract

The reaction of the phosphine oxides, OPEt₃1 and OPn-Bu₃2 with pinacolborane (HBpin) results in phosphine oxide reduction and the formation of O(Bpin)₂3. In contrast, the phosphine oxide OPn-Bu₃ reacts with HB(C₆F₅)₂ or B(C₆F₅)₃ to give only the donor–acceptor adducts. Compound 3 reacts with HNPt-Bu₃ to give the phosphinimonium borate salt, [t-Bu₃PNH₂][(Bpin(OBpin)₂] 6, while reaction with Cp₂ZrMe₂ affords the species Cp₂Zr(OBpin)₂7.