作者:A. O. Kolodyazhnaya、V. P. Kukhar、O. I. Kolodyazhnyi
DOI:10.1134/s1070363208110091
日期:2008.11
Phospha-aldol reaction of dialkylphosphites with carbonyl compounds is catalyzed by cinchonine alkaloids and thier modified derivatives to give optically active hydroxyphosphonates. The use of diastereomeric pairs of alkaloids allowed obtaining both optical antipodes of hydroxyphosphonates. Cinchonine alkaloids show the highest enantioselectivity as organic catalysts. It was found that ordinary crystallization of some enantiomerically enriched hydroxyphosphonates leads to isolation of the enantiomerically pure stereoisomers. Hydroxyphosphonic acids were obtained by hydrolysis of phosphonates. Fluoroalkylphosphonates were obtained by reaction with diethylaminotrifluorosulfurane (DAST).