Studies on aryl H-phosphonates. I. An efficient method for the preparation of deoxyribo- and ribonucleoside 3′-H-phosphonate monoesters by transesterification of diphenyl H-phosphonate

A convenient method for the preparation of deoxyribonucleoside and ribonucleoside 3′-H-phosphonate monoesters via transesterification of diphenyl H-phosphonate with suitable protected nucleosides in pyridine is described.