“…Finally, phosphorylation of nucleosides by ATPA supplemented by hydrolysis, sulfohydrolysis, or acidolysis provides a pathway to prototropic systems of the hydrogenphosphonate (hydrophosphoryl) type. This method was used to prepare primary 343,[417][418][419][420][421][422][423][424] and secondary 349,394 nucleoside phosphites, phosphoramidites, 425 and phosphorothioites, 400,403,426 which are now widely used in various hydrophosphoryl and thiophosphoryl syntheses.…”