| abstract |
A process for preparing phosphoramidates of nucleosides where a desired enantiomer, having regard to the asymmetric chiral centre of the phosphorus atom P, is provided in an enriched amount. The process comprises admixing a nucleoside with a phosphorochloridate in the presence of a catalyst comprising a metal salt selected from the group consisting of salts of Ciu Fe, La and Yb. |