Chemoselective Reduction of the P=O Bond in the Presence of P-O and P-N Bonds in Phosphonate and Phosphinate Derivatives
作者:Sylwia Sowa、K. Michał Pietrusiewicz
DOI:10.1002/ejoc.201801518
日期:2019.2.7
The chemoselectivereduction of P=O bond in α‐hydroxy and α‐amino phosphonic/phosphinic acid derivatives can be achieved without concomitant scission of their ester and amide bonds using commercially available BH3 complexes. The reduction involves an intramolecular assistance by the proximal OH or NH groups enabling preferential removal of the phosphoryl oxygen.
Alkylation of Phosphinite/Phosphonite-Boranes via Temporary Protection of the P–H Bond
作者:Sylwia Sowa、Kamil Modzelewski
DOI:10.1055/s-0040-1707104
日期:2020.8
removal–substitution sequences for the preparation of optically active phosphinite-boranes, our protocol provides a one-step procedure that occurs without loss of stereochemical information at phosphorus. This new approach provides a rather advantageous protocol when compared to direct alkylation methods (which may undergo P-epimerization) and occurs in a stereoselective manner even at 0 °C.