The Preparation of Dialkyl 1-Hydroxyalkylphosphonates in the Reaction of Trialkyl Phosphites with Oxonium Salts Derived from Aldehydes or Ketones
作者:Mirosław Soroka、Waldemar Goldeman
DOI:10.1055/s-2006-950200
日期:——
The reaction of trialkylphosphites with aldehydes or ketones in the presence of hydrogen chloride gives dialkyl 1-hydroxy-alkylphosphonates via Arbusov-like reaction of oxonium salts derived from aldehydes or ketones. This reaction is a very convenient instant method for the preparation of dialkyl 1-hydroxyalkyl-phosphonates with a good yield as an alternative to the well-known Abramov reaction.
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.