Travis Lundrigan, Chieh-Hung Tien, Katherine N. Robertson and Alexander W. H. Speed
Chem. Commun., 2020,56, 8027-8030
DOI:
10.1039/D0CC01072C,
Communication
Air-stable secondary phosphine oxides (SPOs) are readily formed from diazaphospholene bromides. In the presence of pinacolborane, these SPOs are transformed into catalytically active diazaphospholene hydrides. A silyl triflate transforms the SPOs into phosphenium triflates. The use of diazaphospholene SPOs as reduction reaction precatalysts was validated by imine reduction, conjugate reduction, pyridine hydroboration, and asymmetric reduction.
