Approaches to water-soluble phosphines are described which involve conversion of ethylene glycol derivatives and sugar diacetonides into monoallylethers, and hydrophosphorylation of the latter. In the case of the sugars, water-solubility is conferred by a subsequent hydrolysis.
Phosphomolybdic Acid Supported on Silica Gel: An Efficient, Mild and Reusable Catalyst for the Chemoselective Hydrolysis of Acetonides
作者:J. S. Yadav、S. Raghavendra、M. Satyanarayana、E. Balanarsaiah
DOI:10.1055/s-2005-872701
日期:——
Carbohydrate acetonides were chemoselectively cleaved to the corresponding diols by using environmentally benign phosphomolybdic acid (H3PMo12O40) supported on silica gel (PMA-SiO2) at ambient temperature in a short span of 5-7 minutes in acetonitrile. Acid-labile protective groups such as THP, TBS, TBDPS, MOM, OMe and PMB were found to be stable under the reaction conditions.