New Mixed Phosphonate Esters by Transesterification of Pinacol Phosphonates and Their Use in Aldehyde and Ketone Coupling Reactions with Nonstabilized Phosphonates
作者:John F. Reichwein、Brian L. Pagenkopf
DOI:10.1021/jo026834c
日期:2003.2.1
and alkylation with aldehydes or ketones gave beta-hydroxy mixed phosphonateesters. tert-Butyl and benzylic phosphonateester protective groups were introduced to improve the efficiency and functional group compatibility of beta-hydroxy phosphonate saponification. The beta-hydroxy phosphonic acid monomethyl esters were dehydrated with diisopropylcarbodiimide, which gave oxaphosphetane intermediates