Borane Complexes of the H(3)PO(2) P(III) Tautomer: Useful Phosphinate Equivalents.

The preparation and reactivity of novel (R(1)O)(R(2)O)P(BH(3))H [R(1), R(2) = Et, TIPS] synthons is investigated. The direct alkylation of these compounds with lithium hexamethyldisilazide (LiHMDS) and various electrophiles, provided new series of phosphonite-borane complexes, which can be converted into H-phosphinates and boranophosphonates.