A high-yielding and convenient procedure for the efficient conversion of α-hydroxyphosphonates to α-acetyloxyphosphonates using acetic anhydride in the presence of catalytic amounts of copper triflate is described.
A convenient and eco-friendly procedure is described for the efficient preparation of a variety of α-acetyloxyphosphonates from their corresponding α-hydroxyphosphonates using acetic anhydride under microwave irradiation in the absence of solvent.
An Efficient Route to Chiral α- and β-Hydroxyalkanephosphonates
作者:Oscar Pàmies、Jan-E. Bäckvall
DOI:10.1021/jo026888m
日期:2003.6.1
Enzymatic kinetic resolution of alpha- and beta-hydroxyphosphonates in combination with ruthenium-catalyzed alcohol isomerization led to a successful dynamic kinetic resolution. A variety of racemic hydroxyphosphonates were efficiently transformed to the corresponding enantiomerically pure acetates (ee up to 99% and yield up to 87%).
The Reaction of Diethyl Acyl Phosphites with α,β-Unsaturated Carbonyl Compounds
作者:Yoshiki Okamoto、Toshio Azuhata
DOI:10.1246/bcsj.57.2693
日期:1984.9
Diethyl acetyl and diethyl benzoyl phosphites reacted with propenal and 3-buten-2-one to give 1,4-addition products respectively. While the reaction of diethyl acetyl phosphite with 2-butenal and 2-methyl- and 3-phenylpropenals gave 1,2-addition products exclusively.