M. Mayer et al., STUDIES ON TRIFLUOROMETHYLPHOSPHONAMIDITE ANALOGS AS BUILDING-BLOCKS IN OLIGONUCLEOTIDE SYNTHESIS, Tetrahedron letters, 36(12), 1995, pp. 2047-2050
The phosphorylating reagents CF3P(NMe(2))Cl and CF3P(NEt(2))Cl are use
d to phosphorylate the 3'-hydroxyl moiety of several protected 2'-deox
ynucleosides yielding the corresponding nucleoside trifluoromethyl pho
sphonamidites. Their scope and limitations towards amidite activation
are investigated but, however, their behavior is completely different
to commonly used nucleoside phosphorus amidites.