<i>P</i>‑Stereogenic Bicyclo[4.3.1]phosphite Boranes: Synthesis and Utility of Tunable <i>P</i>‑Tether Systems for the Desymmetrization of <i>C</i>₂‑Symmetric 1,3-<i>anti</i>-Diols

The development of <i>P-</i>stereogenic bicyclo[4.3.1]­phosphite borane tether systems for the desymmetrization of <i>C</i>₂-symmetric dienediols is reported. This report highlights preliminary studies including tether installation and removal as well as chemoselective functionalization of the exocyclic olefin via diimide reduction or cross-metathesis. Most notably, a divergent oxidation strategy allows for the transformation of the bicyclic phosphite borane complexes to the corresponding phosphate or thiophosphate systems, highlighting the electronic attenuation of this <i>P</i>-tether system