W. Dabkowski et al., NOVEL UNIQUE CATALYTIC ACTIVATING REAGENTS IN SYNTHESIS OF BIOPHOSPHATES VIA THE PHOSPHORAMIDITE ROUTE, Nucleosides & nucleotides, 17(9-11), 1998, pp. 1639-1644
Trimethylchlorosilane (TMSCl) and 2,4-dinitrophenol ore remarkably eff
icient activators in reaction of P(III) amides with nucleosides to giv
e P(III) esters in excellent yield.